imgui: bump copy

Updated at :

commit f977871854af941289f2a9090dcc90f7aa3449a8
Author: omar <[email protected]>
Date:   Fri Feb 15 13:10:22 2019 +0100

    ImFont: Minor adjustment to the structure.
    Examples: Removed unused variable.

Signed-off-by: Lionel Landwerlin <[email protected]>
Acked-by: Jason Ekstrand <[email protected]>
+1-by: Mike Lothian <[email protected]>
+1-by: Tapani Pälli <[email protected]>
+1-by: Eric Engestrom <[email protected]>
+1-by: Yurii Kolesnykov <[email protected]>
+1-by: myfreeweb <[email protected]>
+1-by: Kenneth Graunke <[email protected]>

1 files changed, 440 insertions, 133 deletions

diff --git a/src/imgui/imgui_internal.h b/src/imgui/imgui_internal.h
index 18302826f0e..3a5b0582984 100644
--- a/src/imgui/imgui_internal.h
+++ b/src/imgui/imgui_internal.h
@@ -1,13 +1,32 @@
-// dear imgui, v1.63 WIP
-// (internals)
+// dear imgui, v1.68 WIP
+// (internal structures/api)
 
 // You may use this file to debug, understand or extend ImGui features but we don't provide any guarantee of forward compatibility!
 // Set:
 //   #define IMGUI_DEFINE_MATH_OPERATORS
 // To implement maths operators for ImVec2 (disabled by default to not collide with using IM_VEC2_CLASS_EXTRA along with your own math types+operators)
 
+/*
+
+Index of this file:
+// Header mess
+// Forward declarations
+// STB libraries includes
+// Context pointer
+// Generic helpers
+// Misc data structures
+// Main imgui context
+// Tab bar, tab item
+// Internal API
+
+*/
+
 #pragma once
 
+//-----------------------------------------------------------------------------
+// Header mess
+//-----------------------------------------------------------------------------
+
 #ifndef IMGUI_VERSION
 #error Must include imgui.h before imgui_internal.h
 #endif
@@ -24,47 +43,57 @@
 
 #ifdef __clang__
 #pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wunused-function"        // for stb_textedit.h
-#pragma clang diagnostic ignored "-Wmissing-prototypes"     // for stb_textedit.h
+#pragma clang diagnostic ignored "-Wunused-function"                // for stb_textedit.h
+#pragma clang diagnostic ignored "-Wmissing-prototypes"             // for stb_textedit.h
 #pragma clang diagnostic ignored "-Wold-style-cast"
+#if __has_warning("-Wzero-as-null-pointer-constant")
+#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
+#endif
+#if __has_warning("-Wdouble-promotion")
+#pragma clang diagnostic ignored "-Wdouble-promotion"
+#endif
 #endif
 
 //-----------------------------------------------------------------------------
-// Forward Declarations
+// Forward declarations
 //-----------------------------------------------------------------------------
 
 struct ImRect;                      // An axis-aligned rectangle (2 points)
 struct ImDrawDataBuilder;           // Helper to build a ImDrawData instance
 struct ImDrawListSharedData;        // Data shared between all ImDrawList instances
-struct ImGuiColMod;                 // Stacked color modifier, backup of modified data so we can restore it
+struct ImGuiColorMod;               // Stacked color modifier, backup of modified data so we can restore it
 struct ImGuiColumnData;             // Storage data for a single column
 struct ImGuiColumnsSet;             // Storage data for a columns set
 struct ImGuiContext;                // Main imgui context
 struct ImGuiGroupData;              // Stacked storage data for BeginGroup()/EndGroup()
+struct ImGuiInputTextState;         // Internal state of the currently focused/edited text input box
 struct ImGuiItemHoveredDataBackup;  // Backup and restore IsItemHovered() internal data
 struct ImGuiMenuColumns;            // Simple column measurement, currently used for MenuItem() only
 struct ImGuiNavMoveResult;          // Result of a directional navigation move query result
 struct ImGuiNextWindowData;         // Storage for SetNexWindow** functions
 struct ImGuiPopupRef;               // Storage for current popup stack
-struct ImGuiSettingsHandler;
+struct ImGuiSettingsHandler;        // Storage for one type registered in the .ini file
 struct ImGuiStyleMod;               // Stacked style modifier, backup of modified data so we can restore it
-struct ImGuiTextEditState;          // Internal state of the currently focused/edited text input box
+struct ImGuiTabBar;                 // Storage for a tab bar
+struct ImGuiTabItem;                // Storage for a tab item (within a tab bar)
 struct ImGuiWindow;                 // Storage for one window
-struct ImGuiWindowTempData;         // Temporary storage for one, that's the data which in theory we could ditch at the end of the frame
+struct ImGuiWindowTempData;         // Temporary storage for one window (that's the data which in theory we could ditch at the end of the frame)
 struct ImGuiWindowSettings;         // Storage for window settings stored in .ini file (we keep one of those even if the actual window wasn't instanced during this session)
 
-typedef int ImGuiLayoutType;        // enum: horizontal or vertical             // enum ImGuiLayoutType_
-typedef int ImGuiButtonFlags;       // flags: for ButtonEx(), ButtonBehavior()  // enum ImGuiButtonFlags_
-typedef int ImGuiItemFlags;         // flags: for PushItemFlag()                // enum ImGuiItemFlags_
-typedef int ImGuiItemStatusFlags;   // flags: storage for DC.LastItemXXX        // enum ImGuiItemStatusFlags_
-typedef int ImGuiNavHighlightFlags; // flags: for RenderNavHighlight()          // enum ImGuiNavHighlightFlags_
-typedef int ImGuiNavDirSourceFlags; // flags: for GetNavInputAmount2d()         // enum ImGuiNavDirSourceFlags_
-typedef int ImGuiNavMoveFlags;      // flags: for navigation requests           // enum ImGuiNavMoveFlags_
-typedef int ImGuiSeparatorFlags;    // flags: for Separator() - internal        // enum ImGuiSeparatorFlags_
-typedef int ImGuiSliderFlags;       // flags: for SliderBehavior()              // enum ImGuiSliderFlags_
+// Use your programming IDE "Go to definition" facility on the names of the center columns to find the actual flags/enum lists.
+typedef int ImGuiLayoutType;        // -> enum ImGuiLayoutType_        // Enum: Horizontal or vertical
+typedef int ImGuiButtonFlags;       // -> enum ImGuiButtonFlags_       // Flags: for ButtonEx(), ButtonBehavior()
+typedef int ImGuiItemFlags;         // -> enum ImGuiItemFlags_         // Flags: for PushItemFlag()
+typedef int ImGuiItemStatusFlags;   // -> enum ImGuiItemStatusFlags_   // Flags: for DC.LastItemStatusFlags
+typedef int ImGuiNavHighlightFlags; // -> enum ImGuiNavHighlightFlags_ // Flags: for RenderNavHighlight()
+typedef int ImGuiNavDirSourceFlags; // -> enum ImGuiNavDirSourceFlags_ // Flags: for GetNavInputAmount2d()
+typedef int ImGuiNavMoveFlags;      // -> enum ImGuiNavMoveFlags_      // Flags: for navigation requests
+typedef int ImGuiSeparatorFlags;    // -> enum ImGuiSeparatorFlags_    // Flags: for Separator() - internal
+typedef int ImGuiSliderFlags;       // -> enum ImGuiSliderFlags_       // Flags: for SliderBehavior()
+typedef int ImGuiDragFlags;         // -> enum ImGuiDragFlags_         // Flags: for DragBehavior()
 
 //-------------------------------------------------------------------------
-// STB libraries
+// STB libraries includes
 //-------------------------------------------------------------------------
 
 namespace ImGuiStb
@@ -72,15 +101,15 @@ namespace ImGuiStb
 
 #undef STB_TEXTEDIT_STRING
 #undef STB_TEXTEDIT_CHARTYPE
-#define STB_TEXTEDIT_STRING             ImGuiTextEditState
+#define STB_TEXTEDIT_STRING             ImGuiInputTextState
 #define STB_TEXTEDIT_CHARTYPE           ImWchar
 #define STB_TEXTEDIT_GETWIDTH_NEWLINE   -1.0f
-#include "stb_textedit.h"
+#include "imstb_textedit.h"
 
 } // namespace ImGuiStb
 
 //-----------------------------------------------------------------------------
-// Context
+// Context pointer
 //-----------------------------------------------------------------------------
 
 #ifndef GImGui
@@ -88,7 +117,7 @@ extern IMGUI_API ImGuiContext* GImGui;  // Current implicit ImGui context pointe
 #endif
 
 //-----------------------------------------------------------------------------
-// Helpers
+// Generic helpers
 //-----------------------------------------------------------------------------
 
 #define IM_PI           3.14159265358979323846f
@@ -98,6 +127,11 @@ extern IMGUI_API ImGuiContext* GImGui;  // Current implicit ImGui context pointe
 #define IM_NEWLINE      "\n"
 #endif
 
+#define IMGUI_DEBUG_LOG(_FMT,...)       printf("[%05d] " _FMT, GImGui->FrameCount, __VA_ARGS__)
+#define IM_STATIC_ASSERT(_COND)         typedef char static_assertion_##__line__[(_COND)?1:-1]
+#define IM_F32_TO_INT8_UNBOUND(_VAL)    ((int)((_VAL) * 255.0f + ((_VAL)>=0 ? 0.5f : -0.5f)))   // Unsaturated, for display purpose
+#define IM_F32_TO_INT8_SAT(_VAL)        ((int)(ImSaturate(_VAL) * 255.0f + 0.5f))               // Saturated, always output 0..255
+
 // Enforce cdecl calling convention for functions called by the standard library, in case compilation settings changed the default to e.g. __vectorcall
 #ifdef _MSC_VER
 #define IMGUI_CDECL __cdecl
@@ -107,13 +141,15 @@ extern IMGUI_API ImGuiContext* GImGui;  // Current implicit ImGui context pointe
 
 // Helpers: UTF-8 <> wchar
 IMGUI_API int           ImTextStrToUtf8(char* buf, int buf_size, const ImWchar* in_text, const ImWchar* in_text_end);      // return output UTF-8 bytes count
-IMGUI_API int           ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end);          // return input UTF-8 bytes count
+IMGUI_API int           ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end);          // read one character. return input UTF-8 bytes count
 IMGUI_API int           ImTextStrFromUtf8(ImWchar* buf, int buf_size, const char* in_text, const char* in_text_end, const char** in_remaining = NULL);   // return input UTF-8 bytes count
 IMGUI_API int           ImTextCountCharsFromUtf8(const char* in_text, const char* in_text_end);                            // return number of UTF-8 code-points (NOT bytes count)
-IMGUI_API int           ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end);                   // return number of bytes to express string as UTF-8 code-points
+IMGUI_API int           ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end);                        // return number of bytes to express one char in UTF-8
+IMGUI_API int           ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end);                   // return number of bytes to express string in UTF-8
 
 // Helpers: Misc
-IMGUI_API ImU32         ImHash(const void* data, int data_size, ImU32 seed = 0);    // Pass data_size==0 for zero-terminated strings
+IMGUI_API ImU32         ImHashData(const void* data, size_t data_size, ImU32 seed = 0);
+IMGUI_API ImU32         ImHashStr(const char* data, size_t data_size, ImU32 seed = 0);
 IMGUI_API void*         ImFileLoadToMemory(const char* filename, const char* file_open_mode, size_t* out_file_size = NULL, int padding_bytes = 0);
 IMGUI_API FILE*         ImFileOpen(const char* filename, const char* file_open_mode);
 static inline bool      ImCharIsBlankA(char c)          { return c == ' ' || c == '\t'; }
@@ -121,28 +157,34 @@ static inline bool      ImCharIsBlankW(unsigned int c)  { return c == ' ' || c =
 static inline bool      ImIsPowerOfTwo(int v)           { return v != 0 && (v & (v - 1)) == 0; }
 static inline int       ImUpperPowerOfTwo(int v)        { v--; v |= v >> 1; v |= v >> 2; v |= v >> 4; v |= v >> 8; v |= v >> 16; v++; return v; }
 #define ImQsort         qsort
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+static inline ImU32     ImHash(const void* data, int size, ImU32 seed = 0) { return size ? ImHashData(data, (size_t)size, seed) : ImHashStr((const char*)data, 0, seed); } // [moved to ImHashStr/ImHashData in 1.68]
+#endif
 
 // Helpers: Geometry
 IMGUI_API ImVec2        ImLineClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& p);
 IMGUI_API bool          ImTriangleContainsPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p);
 IMGUI_API ImVec2        ImTriangleClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p);
 IMGUI_API void          ImTriangleBarycentricCoords(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p, float& out_u, float& out_v, float& out_w);
+IMGUI_API ImGuiDir      ImGetDirQuadrantFromDelta(float dx, float dy);
 
 // Helpers: String
 IMGUI_API int           ImStricmp(const char* str1, const char* str2);
 IMGUI_API int           ImStrnicmp(const char* str1, const char* str2, size_t count);
 IMGUI_API void          ImStrncpy(char* dst, const char* src, size_t count);
 IMGUI_API char*         ImStrdup(const char* str);
+IMGUI_API char*         ImStrdupcpy(char* dst, size_t* p_dst_size, const char* str);
 IMGUI_API const char*   ImStrchrRange(const char* str_begin, const char* str_end, char c);
 IMGUI_API int           ImStrlenW(const ImWchar* str);
-IMGUI_API const ImWchar*ImStrbolW(const ImWchar* buf_mid_line, const ImWchar* buf_begin); // Find beginning-of-line
+IMGUI_API const char*   ImStreolRange(const char* str, const char* str_end);                // End end-of-line
+IMGUI_API const ImWchar*ImStrbolW(const ImWchar* buf_mid_line, const ImWchar* buf_begin);   // Find beginning-of-line
 IMGUI_API const char*   ImStristr(const char* haystack, const char* haystack_end, const char* needle, const char* needle_end);
 IMGUI_API void          ImStrTrimBlanks(char* str);
 IMGUI_API int           ImFormatString(char* buf, size_t buf_size, const char* fmt, ...) IM_FMTARGS(3);
 IMGUI_API int           ImFormatStringV(char* buf, size_t buf_size, const char* fmt, va_list args) IM_FMTLIST(3);
 IMGUI_API const char*   ImParseFormatFindStart(const char* format);
 IMGUI_API const char*   ImParseFormatFindEnd(const char* format);
-IMGUI_API const char*   ImParseFormatTrimDecorations(const char* format, char* buf, int buf_size);
+IMGUI_API const char*   ImParseFormatTrimDecorations(const char* format, char* buf, size_t buf_size);
 IMGUI_API int           ImParseFormatPrecision(const char* format, int default_value);
 
 // Helpers: ImVec2/ImVec4 operators
@@ -205,8 +247,44 @@ static inline ImVec2 ImRotate(const ImVec2& v, float cos_a, float sin_a)
 static inline float  ImLinearSweep(float current, float target, float speed)    { if (current < target) return ImMin(current + speed, target); if (current > target) return ImMax(current - speed, target); return current; }
 static inline ImVec2 ImMul(const ImVec2& lhs, const ImVec2& rhs)                { return ImVec2(lhs.x * rhs.x, lhs.y * rhs.y); }
 
+// Helper: ImBoolVector. Store 1-bit per value.
+// Note that Resize() currently clears the whole vector.
+struct ImBoolVector
+{
+    ImVector<int>   Storage;
+    ImBoolVector()  { }
+    void            Resize(int sz)          { Storage.resize((sz + 31) >> 5); memset(Storage.Data, 0, (size_t)Storage.Size * sizeof(Storage.Data[0])); }
+    void            Clear()                 { Storage.clear(); }
+    bool            GetBit(int n) const     { int off = (n >> 5); int mask = 1 << (n & 31); return (Storage[off] & mask) != 0; }
+    void            SetBit(int n, bool v)   { int off = (n >> 5); int mask = 1 << (n & 31); if (v) Storage[off] |= mask; else Storage[off] &= ~mask; }
+};
+
+// Helper: ImPool<>. Basic keyed storage for contiguous instances, slow/amortized insertion, O(1) indexable, O(Log N) queries by ID over a dense/hot buffer,
+// Honor constructor/destructor. Add/remove invalidate all pointers. Indexes have the same lifetime as the associated object.
+typedef int ImPoolIdx;
+template<typename T>
+struct IMGUI_API ImPool
+{
+    ImVector<T>     Data;       // Contiguous data
+    ImGuiStorage    Map;        // ID->Index
+    ImPoolIdx       FreeIdx;    // Next free idx to use
+
+    ImPool()    { FreeIdx = 0; }
+    ~ImPool()   { Clear(); }
+    T*          GetByKey(ImGuiID key)               { int idx = Map.GetInt(key, -1); return (idx != -1) ? &Data[idx] : NULL; }
+    T*          GetByIndex(ImPoolIdx n)             { return &Data[n]; }
+    ImPoolIdx   GetIndex(const T* p) const          { IM_ASSERT(p >= Data.Data && p < Data.Data + Data.Size); return (ImPoolIdx)(p - Data.Data); }
+    T*          GetOrAddByKey(ImGuiID key)          { int* p_idx = Map.GetIntRef(key, -1); if (*p_idx != -1) return &Data[*p_idx]; *p_idx = FreeIdx; return Add(); }
+    void        Clear()                             { for (int n = 0; n < Map.Data.Size; n++) { int idx = Map.Data[n].val_i; if (idx != -1) Data[idx].~T(); }  Map.Clear(); Data.clear(); FreeIdx = 0; }
+    T*          Add()                               { int idx = FreeIdx; if (idx == Data.Size) { Data.resize(Data.Size + 1); FreeIdx++; } else { FreeIdx = *(int*)&Data[idx]; } IM_PLACEMENT_NEW(&Data[idx]) T(); return &Data[idx]; }
+    void        Remove(ImGuiID key, const T* p)     { Remove(key, GetIndex(p)); }
+    void        Remove(ImGuiID key, ImPoolIdx idx)  { Data[idx].~T(); *(int*)&Data[idx] = FreeIdx; FreeIdx = idx; Map.SetInt(key, -1); }
+    void        Reserve(int capacity)               { Data.reserve(capacity); Map.Data.reserve(capacity); }
+    int         GetSize() const                     { return Data.Size; }
+};
+
 //-----------------------------------------------------------------------------
-// Types
+// Misc data structures
 //-----------------------------------------------------------------------------
 
 enum ImGuiButtonFlags_
@@ -234,6 +312,12 @@ enum ImGuiSliderFlags_
     ImGuiSliderFlags_Vertical               = 1 << 0
 };
 
+enum ImGuiDragFlags_
+{
+    ImGuiDragFlags_None                     = 0,
+    ImGuiDragFlags_Vertical                 = 1 << 0
+};
+
 enum ImGuiColumnsFlags_
 {
     // Default: 0
@@ -251,8 +335,7 @@ enum ImGuiSelectableFlagsPrivate_
     ImGuiSelectableFlags_NoHoldingActiveID  = 1 << 10,
     ImGuiSelectableFlags_PressedOnClick     = 1 << 11,
     ImGuiSelectableFlags_PressedOnRelease   = 1 << 12,
-    ImGuiSelectableFlags_Disabled           = 1 << 13,
-    ImGuiSelectableFlags_DrawFillAvailWidth = 1 << 14
+    ImGuiSelectableFlags_DrawFillAvailWidth = 1 << 13
 };
 
 enum ImGuiSeparatorFlags_
@@ -262,21 +345,45 @@ enum ImGuiSeparatorFlags_
     ImGuiSeparatorFlags_Vertical            = 1 << 1
 };
 
+// Transient per-window flags, reset at the beginning of the frame. For child window, inherited from parent on first Begin().
+// This is going to be exposed in imgui.h when stabilized enough.
+enum ImGuiItemFlags_
+{
+    ImGuiItemFlags_NoTabStop                = 1 << 0,  // false
+    ImGuiItemFlags_ButtonRepeat             = 1 << 1,  // false    // Button() will return true multiple times based on io.KeyRepeatDelay and io.KeyRepeatRate settings.
+    ImGuiItemFlags_Disabled                 = 1 << 2,  // false    // [BETA] Disable interactions but doesn't affect visuals yet. See github.com/ocornut/imgui/issues/211
+    ImGuiItemFlags_NoNav                    = 1 << 3,  // false
+    ImGuiItemFlags_NoNavDefaultFocus        = 1 << 4,  // false
+    ImGuiItemFlags_SelectableDontClosePopup = 1 << 5,  // false    // MenuItem/Selectable() automatically closes current Popup window
+    ImGuiItemFlags_Default_                 = 0
+};
+
 // Storage for LastItem data
 enum ImGuiItemStatusFlags_
 {
     ImGuiItemStatusFlags_None               = 0,
     ImGuiItemStatusFlags_HoveredRect        = 1 << 0,
-    ImGuiItemStatusFlags_HasDisplayRect     = 1 << 1
+    ImGuiItemStatusFlags_HasDisplayRect     = 1 << 1,
+    ImGuiItemStatusFlags_Edited             = 1 << 2    // Value exposed by item was edited in the current frame (should match the bool return value of most widgets)
+
+#ifdef IMGUI_ENABLE_TEST_ENGINE
+    , // [imgui-test only]
+    ImGuiItemStatusFlags_Openable           = 1 << 10,  //
+    ImGuiItemStatusFlags_Opened             = 1 << 11,  //
+    ImGuiItemStatusFlags_Checkable          = 1 << 12,  //
+    ImGuiItemStatusFlags_Checked            = 1 << 13   //
+#endif
 };
 
 // FIXME: this is in development, not exposed/functional as a generic feature yet.
+// Horizontal/Vertical enums are fixed to 0/1 so they may be used to index ImVec2
 enum ImGuiLayoutType_
 {
-    ImGuiLayoutType_Vertical,
-    ImGuiLayoutType_Horizontal
+    ImGuiLayoutType_Horizontal = 0,
+    ImGuiLayoutType_Vertical = 1
 };
 
+// X/Y enums are fixed to 0/1 so they may be used to index ImVec2
 enum ImGuiAxis
 {
     ImGuiAxis_None = -1,
@@ -313,14 +420,16 @@ enum ImGuiInputReadMode
 
 enum ImGuiNavHighlightFlags_
 {
+    ImGuiNavHighlightFlags_None         = 0,
     ImGuiNavHighlightFlags_TypeDefault  = 1 << 0,
     ImGuiNavHighlightFlags_TypeThin     = 1 << 1,
-    ImGuiNavHighlightFlags_AlwaysDraw   = 1 << 2,
+    ImGuiNavHighlightFlags_AlwaysDraw   = 1 << 2,       // Draw rectangular highlight if (g.NavId == id) _even_ when using the mouse.
     ImGuiNavHighlightFlags_NoRounding   = 1 << 3
 };
 
 enum ImGuiNavDirSourceFlags_
 {
+    ImGuiNavDirSourceFlags_None         = 0,
     ImGuiNavDirSourceFlags_Keyboard     = 1 << 0,
     ImGuiNavDirSourceFlags_PadDPad      = 1 << 1,
     ImGuiNavDirSourceFlags_PadLStick    = 1 << 2
@@ -328,6 +437,7 @@ enum ImGuiNavDirSourceFlags_
 
 enum ImGuiNavMoveFlags_
 {
+    ImGuiNavMoveFlags_None                  = 0,
     ImGuiNavMoveFlags_LoopX                 = 1 << 0,   // On failed request, restart from opposite side
     ImGuiNavMoveFlags_LoopY                 = 1 << 1,
     ImGuiNavMoveFlags_WrapX                 = 1 << 2,   // On failed request, request from opposite side one line down (when NavDir==right) or one line up (when NavDir==left)
@@ -343,6 +453,28 @@ enum ImGuiNavForward
     ImGuiNavForward_ForwardActive
 };
 
+enum ImGuiNavLayer
+{
+    ImGuiNavLayer_Main  = 0,    // Main scrolling layer
+    ImGuiNavLayer_Menu  = 1,    // Menu layer (access with Alt/ImGuiNavInput_Menu)
+    ImGuiNavLayer_COUNT
+};
+
+enum ImGuiPopupPositionPolicy
+{
+    ImGuiPopupPositionPolicy_Default,
+    ImGuiPopupPositionPolicy_ComboBox
+};
+
+// 1D vector (this odd construct is used to facilitate the transition between 1D and 2D, and the maintenance of some branches/patches)
+struct ImVec1
+{
+    float   x;
+    ImVec1()         { x = 0.0f; }
+    ImVec1(float _x) { x = _x; }
+};
+
+
 // 2D axis aligned bounding-box
 // NB: we can't rely on ImVec2 math operators being available here
 struct IMGUI_API ImRect
@@ -380,7 +512,7 @@ struct IMGUI_API ImRect
 };
 
 // Stacked color modifier, backup of modified data so we can restore it
-struct ImGuiColMod
+struct ImGuiColorMod
 {
     ImGuiCol    Col;
     ImVec4      BackupValue;
@@ -401,12 +533,12 @@ struct ImGuiGroupData
 {
     ImVec2      BackupCursorPos;
     ImVec2      BackupCursorMaxPos;
-    float       BackupIndentX;
-    float       BackupGroupOffsetX;
-    float       BackupCurrentLineHeight;
+    ImVec1      BackupIndent;
+    ImVec1      BackupGroupOffset;
+    ImVec2      BackupCurrentLineSize;
     float       BackupCurrentLineTextBaseOffset;
     float       BackupLogLinePosY;
-    bool        BackupActiveIdIsAlive;
+    ImGuiID     BackupActiveIdIsAlive;
     bool        BackupActiveIdPreviousFrameIsAlive;
     bool        AdvanceCursor;
 };
@@ -426,27 +558,32 @@ struct IMGUI_API ImGuiMenuColumns
 };
 
 // Internal state of the currently focused/edited text input box
-struct IMGUI_API ImGuiTextEditState
+struct IMGUI_API ImGuiInputTextState
 {
-    ImGuiID             Id;                         // widget id owning the text state
-    ImVector<ImWchar>   Text;                       // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer.
-    ImVector<char>      InitialText;                // backup of end-user buffer at the time of focus (in UTF-8, unaltered)
-    ImVector<char>      TempTextBuffer;
-    int                 CurLenA, CurLenW;           // we need to maintain our buffer length in both UTF-8 and wchar format.
-    int                 BufSizeA;                   // end-user buffer size
-    float               ScrollX;
-    ImGuiStb::STB_TexteditState   StbState;
-    float               CursorAnim;
-    bool                CursorFollow;
-    bool                SelectedAllMouseLock;
-
-    ImGuiTextEditState()                            { memset(this, 0, sizeof(*this)); }
+    ImGuiID                 ID;                     // widget id owning the text state
+    ImVector<ImWchar>       TextW;                  // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer.
+    ImVector<char>          InitialText;            // backup of end-user buffer at the time of focus (in UTF-8, unaltered)
+    ImVector<char>          TempBuffer;             // temporary buffer for callback and other other operations. size=capacity.
+    int                     CurLenA, CurLenW;       // we need to maintain our buffer length in both UTF-8 and wchar format.
+    int                     BufCapacityA;           // end-user buffer capacity
+    float                   ScrollX;
+    ImGuiStb::STB_TexteditState StbState;
+    float                   CursorAnim;
+    bool                    CursorFollow;
+    bool                    SelectedAllMouseLock;
+
+    // Temporarily set when active
+    ImGuiInputTextFlags     UserFlags;
+    ImGuiInputTextCallback  UserCallback;
+    void*                   UserCallbackData;
+
+    ImGuiInputTextState()                           { memset(this, 0, sizeof(*this)); }
     void                CursorAnimReset()           { CursorAnim = -0.30f; }                                   // After a user-input the cursor stays on for a while without blinking
     void                CursorClamp()               { StbState.cursor = ImMin(StbState.cursor, CurLenW); StbState.select_start = ImMin(StbState.select_start, CurLenW); StbState.select_end = ImMin(StbState.select_end, CurLenW); }
     bool                HasSelection() const        { return StbState.select_start != StbState.select_end; }
     void                ClearSelection()            { StbState.select_start = StbState.select_end = StbState.cursor; }
-    void                SelectAll()                 { StbState.select_start = 0; StbState.cursor = StbState.select_end = CurLenW; StbState.has_preferred_x = false; }
-    void                OnKeyPressed(int key);
+    void                SelectAll()                 { StbState.select_start = 0; StbState.cursor = StbState.select_end = CurLenW; StbState.has_preferred_x = 0; }
+    void                OnKeyPressed(int key);      // Cannot be inline because we call in code in stb_textedit.h implementation
 };
 
 // Windows data saved in imgui.ini file
@@ -463,8 +600,8 @@ struct ImGuiWindowSettings
 
 struct ImGuiSettingsHandler
 {
-    const char* TypeName;   // Short description stored in .ini file. Disallowed characters: '[' ']'
-    ImGuiID     TypeHash;   // == ImHash(TypeName, 0, 0)
+    const char* TypeName;       // Short description stored in .ini file. Disallowed characters: '[' ']'
+    ImGuiID     TypeHash;       // == ImHashStr(TypeName, 0, 0)
     void*       (*ReadOpenFn)(ImGuiContext* ctx, ImGuiSettingsHandler* handler, const char* name);              // Read: Called when entering into a new ini entry e.g. "[Window][Name]"
     void        (*ReadLineFn)(ImGuiContext* ctx, ImGuiSettingsHandler* handler, void* entry, const char* line); // Read: Called for every line of text within an ini entry
     void        (*WriteAllFn)(ImGuiContext* ctx, ImGuiSettingsHandler* handler, ImGuiTextBuffer* out_buf);      // Write: Output every entries into 'out_buf'
@@ -554,6 +691,7 @@ struct ImDrawDataBuilder
 struct ImGuiNavMoveResult
 {
     ImGuiID       ID;           // Best candidate
+    ImGuiID       SelectScopeId;// Best candidate window current selectable group ID
     ImGuiWindow*  Window;       // Best candidate window
     float         DistBox;      // Best candidate box distance to current NavId
     float         DistCenter;   // Best candidate center distance to current NavId
@@ -561,7 +699,7 @@ struct ImGuiNavMoveResult
     ImRect        RectRel;      // Best candidate bounding box in window relative space
 
     ImGuiNavMoveResult() { Clear(); }
-    void Clear()         { ID = 0; Window = NULL; DistBox = DistCenter = DistAxial = FLT_MAX; RectRel = ImRect(); }
+    void Clear()         { ID = SelectScopeId = 0; Window = NULL; DistBox = DistCenter = DistAxial = FLT_MAX; RectRel = ImRect(); }
 };
 
 // Storage for SetNexWindow** functions
@@ -604,10 +742,25 @@ struct ImGuiNextWindowData
     }
 };
 
+//-----------------------------------------------------------------------------
+// Tabs
+//-----------------------------------------------------------------------------
+
+struct ImGuiTabBarSortItem
+{
+    int         Index;
+    float       Width;
+};
+
+//-----------------------------------------------------------------------------
 // Main imgui context
+//-----------------------------------------------------------------------------
+
 struct ImGuiContext
 {
     bool                    Initialized;
+    bool                    FrameScopeActive;                   // Set by NewFrame(), cleared by EndFrame()
+    bool                    FrameScopePushedImplicitWindow;     // Set by NewFrame(), cleared by EndFrame()
     bool                    FontAtlasOwnedByContext;            // Io.Fonts-> is owned by the ImGuiContext and will be destructed along with it.
     ImGuiIO                 IO;
     ImGuiStyle              Style;
@@ -620,7 +773,8 @@ struct ImGuiContext
     int                     FrameCount;
     int                     FrameCountEnded;
     int                     FrameCountRendered;
-    ImVector<ImGuiWindow*>  Windows;
+    ImVector<ImGuiWindow*>  Windows;                            // Windows, sorted in display order, back to front
+    ImVector<ImGuiWindow*>  WindowsFocusOrder;                  // Windows, sorted in focus order, back to front
     ImVector<ImGuiWindow*>  WindowsSortBuffer;
     ImVector<ImGuiWindow*>  CurrentWindowStack;
     ImGuiStorage            WindowsById;
@@ -631,29 +785,33 @@ struct ImGuiContext
     ImGuiID                 HoveredId;                          // Hovered widget
     bool                    HoveredIdAllowOverlap;
     ImGuiID                 HoveredIdPreviousFrame;
-    float                   HoveredIdTimer;
+    float                   HoveredIdTimer;                     // Measure contiguous hovering time
+    float                   HoveredIdNotActiveTimer;            // Measure contiguous hovering time where the item has not been active
     ImGuiID                 ActiveId;                           // Active widget
     ImGuiID                 ActiveIdPreviousFrame;
+    ImGuiID                 ActiveIdIsAlive;                    // Active widget has been seen this frame (we can't use a bool as the ActiveId may change within the frame)
     float                   ActiveIdTimer;
-    bool                    ActiveIdIsAlive;                    // Active widget has been seen this frame
     bool                    ActiveIdIsJustActivated;            // Set at the time of activation for one frame
     bool                    ActiveIdAllowOverlap;               // Active widget allows another widget to steal active id (generally for overlapping widgets, but not always)
-    bool                    ActiveIdValueChanged;
+    bool                    ActiveIdHasBeenPressed;             // Track whether the active id led to a press (this is to allow changing between PressOnClick and PressOnRelease without pressing twice). Used by range_select branch.
+    bool                    ActiveIdHasBeenEdited;              // Was the value associated to the widget Edited over the course of the Active state.
     bool                    ActiveIdPreviousFrameIsAlive;
-    bool                    ActiveIdPreviousFrameValueChanged;
+    bool                    ActiveIdPreviousFrameHasBeenEdited;
     int                     ActiveIdAllowNavDirFlags;           // Active widget allows using directional navigation (e.g. can activate a button and move away from it)
+    int                     ActiveIdBlockNavInputFlags;
     ImVec2                  ActiveIdClickOffset;                // Clicked offset from upper-left corner, if applicable (currently only set by ButtonBehavior)
     ImGuiWindow*            ActiveIdWindow;
     ImGuiWindow*            ActiveIdPreviousFrameWindow;
     ImGuiInputSource        ActiveIdSource;                     // Activating with mouse or nav (gamepad/keyboard)
     ImGuiID                 LastActiveId;                       // Store the last non-zero ActiveId, useful for animation.
     float                   LastActiveIdTimer;                  // Store the last non-zero ActiveId timer since the beginning of activation, useful for animation.
+    ImVec2                  LastValidMousePos;
     ImGuiWindow*            MovingWindow;                       // Track the window we clicked on (in order to preserve focus). The actually window that is moved is generally MovingWindow->RootWindow.
-    ImVector<ImGuiColMod>   ColorModifiers;                     // Stack for PushStyleColor()/PopStyleColor()
+    ImVector<ImGuiColorMod> ColorModifiers;                     // Stack for PushStyleColor()/PopStyleColor()
     ImVector<ImGuiStyleMod> StyleModifiers;                     // Stack for PushStyleVar()/PopStyleVar()
     ImVector<ImFont*>       FontStack;                          // Stack for PushFont()/PopFont()
     ImVector<ImGuiPopupRef> OpenPopupStack;                     // Which popups are open (persistent)
-    ImVector<ImGuiPopupRef> CurrentPopupStack;                  // Which level of BeginPopup() we are in (reset every frame)
+    ImVector<ImGuiPopupRef> BeginPopupStack;                    // Which level of BeginPopup() we are in (reset every frame)
     ImGuiNextWindowData     NextWindowData;                     // Storage for SetNextWindow** functions
     bool                    NextTreeNodeOpenVal;                // Storage for SetNextTreeNode** functions
     ImGuiCond               NextTreeNodeOpenCond;
@@ -666,9 +824,10 @@ struct ImGuiContext
     ImGuiID                 NavActivatePressedId;               // ~~ IsNavInputPressed(ImGuiNavInput_Activate) ? NavId : 0
     ImGuiID                 NavInputId;                         // ~~ IsNavInputPressed(ImGuiNavInput_Input) ? NavId : 0
     ImGuiID                 NavJustTabbedId;                    // Just tabbed to this id.
-    ImGuiID                 NavJustMovedToId;                   // Just navigated to this id (result of a successfully MoveRequest)
-    ImGuiID                 NavNextActivateId;                  // Set by ActivateItem(), queued until next frame
-    ImGuiInputSource        NavInputSource;                     // Keyboard or Gamepad mode?
+    ImGuiID                 NavJustMovedToId;                   // Just navigated to this id (result of a successfully MoveRequest).
+    ImGuiID                 NavJustMovedToSelectScopeId;        // Just navigated to this select scope id (result of a successfully MoveRequest).
+    ImGuiID                 NavNextActivateId;                  // Set by ActivateItem(), queued until next frame.
+    ImGuiInputSource        NavInputSource;                     // Keyboard or Gamepad mode? THIS WILL ONLY BE None or NavGamepad or NavKeyboard.
     ImRect                  NavScoringRectScreen;               // Rectangle used for scoring, in screen space. Based of window->DC.NavRefRectRel[], modified for directional navigation scoring.
     int                     NavScoringCount;                    // Metrics for debugging
     ImGuiWindow*            NavWindowingTarget;                 // When selecting a window (holding Menu+FocusPrev/Next, or equivalent of CTRL-TAB) this window is temporarily displayed front-most.
@@ -677,7 +836,7 @@ struct ImGuiContext
     float                   NavWindowingTimer;
     float                   NavWindowingHighlightAlpha;
     bool                    NavWindowingToggleLayer;
-    int                     NavLayer;                           // Layer we are navigating on. For now the system is hard-coded for 0=main contents and 1=menu/title bar, may expose layers later.
+    ImGuiNavLayer           NavLayer;                           // Layer we are navigating on. For now the system is hard-coded for 0=main contents and 1=menu/title bar, may expose layers later.
     int                     NavIdTabCounter;                    // == NavWindow->DC.FocusIdxTabCounter at time of NavId processing
     bool                    NavIdIsAlive;                       // Nav widget has been seen this frame ~~ NavRefRectRel is valid
     bool                    NavMousePosDirty;                   // When set we will update mouse position if (io.ConfigFlags & ImGuiConfigFlags_NavEnableSetMousePos) if set (NB: this not enabled by default)
@@ -709,6 +868,7 @@ struct ImGuiContext
     bool                    DragDropActive;
     bool                    DragDropWithinSourceOrTarget;
     ImGuiDragDropFlags      DragDropSourceFlags;
+    int                     DragDropSourceFrameCount;
     int                     DragDropMouseButton;
     ImGuiPayload            DragDropPayload;
     ImRect                  DragDropTargetRect;
@@ -721,8 +881,13 @@ struct ImGuiContext
     ImVector<unsigned char> DragDropPayloadBufHeap;             // We don't expose the ImVector<> directly
     unsigned char           DragDropPayloadBufLocal[8];         // Local buffer for small payloads
 
+    // Tab bars
+    ImPool<ImGuiTabBar>     TabBars;
+    ImVector<ImGuiTabBar*>  CurrentTabBar;
+    ImVector<ImGuiTabBarSortItem>   TabSortByWidthBuffer;
+
     // Widget state
-    ImGuiTextEditState      InputTextState;
+    ImGuiInputTextState     InputTextState;
     ImFont                  InputTextPasswordFont;
     ImGuiID                 ScalarAsInputTextId;                // Temporary text input when CTRL+clicking on a slider, etc.
     ImGuiColorEditFlags     ColorEditOptions;                   // Store user options for color edit widgets
@@ -733,7 +898,14 @@ struct ImGuiContext
     ImVec2                  ScrollbarClickDeltaToGrabCenter;    // Distance between mouse and center of grab box, normalized in parent space. Use storage?
     int                     TooltipOverrideCount;
     ImVector<char>          PrivateClipboard;                   // If no custom clipboard handler is defined
-    ImVec2                  PlatformImePos, PlatformImeLastPos; // Cursor position request & last passed to the OS Input Method Editor
+
+    // Range-Select/Multi-Select
+    // [This is unused in this branch, but left here to facilitate merging/syncing multiple branches]
+    ImGuiID                 MultiSelectScopeId;
+
+    // Platform support
+    ImVec2                  PlatformImePos;                     // Cursor position request & last passed to the OS Input Method Editor
+    ImVec2                  PlatformImeLastPos;
 
     // Settings
     bool                           SettingsLoaded;
@@ -761,6 +933,7 @@ struct ImGuiContext
     ImGuiContext(ImFontAtlas* shared_font_atlas) : OverlayDrawList(NULL)
     {
         Initialized = false;
+        FrameScopeActive = FrameScopePushedImplicitWindow = false;
         Font = NULL;
         FontSize = FontBaseSize = 0.0f;
         FontAtlasOwnedByContext = shared_font_atlas ? false : true;
@@ -776,36 +949,39 @@ struct ImGuiContext
         HoveredId = 0;
         HoveredIdAllowOverlap = false;
         HoveredIdPreviousFrame = 0;
-        HoveredIdTimer = 0.0f;
+        HoveredIdTimer = HoveredIdNotActiveTimer = 0.0f;
         ActiveId = 0;
         ActiveIdPreviousFrame = 0;
+        ActiveIdIsAlive = 0;
         ActiveIdTimer = 0.0f;
-        ActiveIdIsAlive = false;
         ActiveIdIsJustActivated = false;
         ActiveIdAllowOverlap = false;
-        ActiveIdValueChanged = false;
+        ActiveIdHasBeenPressed = false;
+        ActiveIdHasBeenEdited = false;
         ActiveIdPreviousFrameIsAlive = false;
-        ActiveIdPreviousFrameValueChanged = false;
-        ActiveIdAllowNavDirFlags = 0;
+        ActiveIdPreviousFrameHasBeenEdited = false;
+        ActiveIdAllowNavDirFlags = 0x00;
+        ActiveIdBlockNavInputFlags = 0x00;
         ActiveIdClickOffset = ImVec2(-1,-1);
         ActiveIdWindow = ActiveIdPreviousFrameWindow = NULL;
         ActiveIdSource = ImGuiInputSource_None;
         LastActiveId = 0;
         LastActiveIdTimer = 0.0f;
+        LastValidMousePos = ImVec2(0.0f, 0.0f);
         MovingWindow = NULL;
         NextTreeNodeOpenVal = false;
         NextTreeNodeOpenCond = 0;
 
         NavWindow = NULL;
         NavId = NavActivateId = NavActivateDownId = NavActivatePressedId = NavInputId = 0;
-        NavJustTabbedId = NavJustMovedToId = NavNextActivateId = 0;
+        NavJustTabbedId = NavJustMovedToId = NavJustMovedToSelectScopeId = NavNextActivateId = 0;
         NavInputSource = ImGuiInputSource_None;
         NavScoringRectScreen = ImRect();
         NavScoringCount = 0;
         NavWindowingTarget = NavWindowingTargetAnim = NavWindowingList = NULL;
         NavWindowingTimer = NavWindowingHighlightAlpha = 0.0f;
         NavWindowingToggleLayer = false;
-        NavLayer = 0;
+        NavLayer = ImGuiNavLayer_Main;
         NavIdTabCounter = INT_MAX;
         NavIdIsAlive = false;
         NavMousePosDirty = false;
@@ -828,6 +1004,7 @@ struct ImGuiContext
 
         DragDropActive = DragDropWithinSourceOrTarget = false;
         DragDropSourceFlags = 0;
+        DragDropSourceFrameCount = -1;
         DragDropMouseButton = -1;
         DragDropTargetId = 0;
         DragDropAcceptFlags = 0;
@@ -843,6 +1020,9 @@ struct ImGuiContext
         DragSpeedDefaultRatio = 1.0f / 100.0f;
         ScrollbarClickDeltaToGrabCenter = ImVec2(0.0f, 0.0f);
         TooltipOverrideCount = 0;
+
+        MultiSelectScopeId = 0;
+
         PlatformImePos = PlatformImeLastPos = ImVec2(FLT_MAX, FLT_MAX);
 
         SettingsLoaded = false;
@@ -861,18 +1041,9 @@ struct ImGuiContext
     }
 };
 
-// Transient per-window flags, reset at the beginning of the frame. For child window, inherited from parent on first Begin().
-// This is going to be exposed in imgui.h when stabilized enough.
-enum ImGuiItemFlags_
-{
-    ImGuiItemFlags_AllowKeyboardFocus           = 1 << 0,  // true
-    ImGuiItemFlags_ButtonRepeat                 = 1 << 1,  // false    // Button() will return true multiple times based on io.KeyRepeatDelay and io.KeyRepeatRate settings.
-    ImGuiItemFlags_Disabled                     = 1 << 2,  // false    // [BETA] Disable interactions but doesn't affect visuals yet. See github.com/ocornut/imgui/issues/211
-    ImGuiItemFlags_NoNav                        = 1 << 3,  // false
-    ImGuiItemFlags_NoNavDefaultFocus            = 1 << 4,  // false
-    ImGuiItemFlags_SelectableDontClosePopup     = 1 << 5,  // false    // MenuItem/Selectable() automatically closes current Popup window
-    ImGuiItemFlags_Default_                     = ImGuiItemFlags_AllowKeyboardFocus
-};
+//-----------------------------------------------------------------------------
+// ImGuiWindow
+//-----------------------------------------------------------------------------
 
 // Transient per-window data, reset at the beginning of the frame. This used to be called ImGuiDrawContext, hence the DC variable name in ImGuiWindow.
 // FIXME: That's theory, in practice the delimitation between ImGuiWindow and ImGuiWindowTempData is quite tenuous and could be reconsidered.
@@ -880,11 +1051,11 @@ struct IMGUI_API ImGuiWindowTempData
 {
     ImVec2                  CursorPos;
     ImVec2                  CursorPosPrevLine;
-    ImVec2                  CursorStartPos;
+    ImVec2                  CursorStartPos;         // Initial position in client area with padding
     ImVec2                  CursorMaxPos;           // Used to implicitly calculate the size of our contents, always growing during the frame. Turned into window->SizeContents at the beginning of next frame
-    float                   CurrentLineHeight;
+    ImVec2                  CurrentLineSize;
     float                   CurrentLineTextBaseOffset;
-    float                   PrevLineHeight;
+    ImVec2                  PrevLineSize;
     float                   PrevLineTextBaseOffset;
     float                   LogLinePosY;
     int                     TreeDepth;
@@ -893,12 +1064,12 @@ struct IMGUI_API ImGuiWindowTempData
     ImGuiItemStatusFlags    LastItemStatusFlags;
     ImRect                  LastItemRect;           // Interaction rect
     ImRect                  LastItemDisplayRect;    // End-user display rect (only valid if LastItemStatusFlags & ImGuiItemStatusFlags_HasDisplayRect)
-    bool                    NavHideHighlightOneFrame;
-    bool                    NavHasScroll;           // Set when scrolling can be used (ScrollMax > 0.0f)
-    int                     NavLayerCurrent;        // Current layer, 0..31 (we currently only use 0..1)
+    ImGuiNavLayer           NavLayerCurrent;        // Current layer, 0..31 (we currently only use 0..1)
     int                     NavLayerCurrentMask;    // = (1 << NavLayerCurrent) used by ItemAdd prior to clipping.
     int                     NavLayerActiveMask;     // Which layer have been written to (result from previous frame)
     int                     NavLayerActiveMaskNext; // Which layer have been written to (buffer for current frame)
+    bool                    NavHideHighlightOneFrame;
+    bool                    NavHasScroll;           // Set when scrolling can be used (ScrollMax > 0.0f)
     bool                    MenuBarAppending;       // FIXME: Remove this
     ImVec2                  MenuBarOffset;          // MenuBarOffset.x is sort of equivalent of a per-layer CursorPos.x, saved/restored as we switch to the menu bar. The only situation when MenuBarOffset.y is > 0 if when (SafeAreaPadding.y > FramePadding.y), often used on TVs.
     ImVector<ImGuiWindow*>  ChildWindows;
@@ -914,17 +1085,17 @@ struct IMGUI_API ImGuiWindowTempData
     ImVector<float>         ItemWidthStack;
     ImVector<float>         TextWrapPosStack;
     ImVector<ImGuiGroupData>GroupStack;
-    int                     StackSizesBackup[6];    // Store size of various stacks for asserting
+    short                   StackSizesBackup[6];    // Store size of various stacks for asserting
 
-    float                   IndentX;                // Indentation / start position from left of window (increased by TreePush/TreePop, etc.)
-    float                   GroupOffsetX;
-    float                   ColumnsOffsetX;         // Offset to the current column (if ColumnsCurrent > 0). FIXME: This and the above should be a stack to allow use cases like Tree->Column->Tree. Need revamp columns API.
+    ImVec1                  Indent;                 // Indentation / start position from left of window (increased by TreePush/TreePop, etc.)
+    ImVec1                  GroupOffset;
+    ImVec1                  ColumnsOffset;          // Offset to the current column (if ColumnsCurrent > 0). FIXME: This and the above should be a stack to allow use cases like Tree->Column->Tree. Need revamp columns API.
     ImGuiColumnsSet*        ColumnsSet;             // Current columns set
 
     ImGuiWindowTempData()
     {
         CursorPos = CursorPosPrevLine = CursorStartPos = CursorMaxPos = ImVec2(0.0f, 0.0f);
-        CurrentLineHeight = PrevLineHeight = 0.0f;
+        CurrentLineSize = PrevLineSize = ImVec2(0.0f, 0.0f);
         CurrentLineTextBaseOffset = PrevLineTextBaseOffset = 0.0f;
         LogLinePosY = -1.0f;
         TreeDepth = 0;
@@ -932,11 +1103,11 @@ struct IMGUI_API ImGuiWindowTempData
         LastItemId = 0;
         LastItemStatusFlags = 0;
         LastItemRect = LastItemDisplayRect = ImRect();
+        NavLayerActiveMask = NavLayerActiveMaskNext = 0x00;
+        NavLayerCurrent = ImGuiNavLayer_Main;
+        NavLayerCurrentMask = (1 << ImGuiNavLayer_Main);
         NavHideHighlightOneFrame = false;
         NavHasScroll = false;
-        NavLayerActiveMask = NavLayerActiveMaskNext = 0x00;
-        NavLayerCurrent = 0;
-        NavLayerCurrentMask = 1 << 0;
         MenuBarAppending = false;
         MenuBarOffset = ImVec2(0.0f, 0.0f);
         StateStorage = NULL;
@@ -946,9 +1117,9 @@ struct IMGUI_API ImGuiWindowTempData
         TextWrapPos = -1.0f;
         memset(StackSizesBackup, 0, sizeof(StackSizesBackup));
 
-        IndentX = 0.0f;
-        GroupOffsetX = 0.0f;
-        ColumnsOffsetX = 0.0f;
+        Indent = ImVec1(0.0f);
+        GroupOffset = ImVec1(0.0f);
+        ColumnsOffset = ImVec1(0.0f);
         ColumnsSet = NULL;
     }
 };
@@ -968,6 +1139,7 @@ struct IMGUI_API ImGuiWindow
     ImVec2                  WindowPadding;                      // Window padding at the time of begin.
     float                   WindowRounding;                     // Window rounding at the time of begin.
     float                   WindowBorderSize;                   // Window border size at the time of begin.
+    int                     NameBufLen;                         // Size of buffer storing Name. May be larger than strlen(Name)!
     ImGuiID                 MoveId;                             // == window->GetID("#MOVE")
     ImGuiID                 ChildId;                            // ID of corresponding item in parent window (for navigation to return from child window to parent window)
     ImVec2                  Scroll;
@@ -979,14 +1151,15 @@ struct IMGUI_API ImGuiWindow
     bool                    WasActive;
     bool                    WriteAccessed;                      // Set to true when any widget access the current window
     bool                    Collapsed;                          // Set when collapsing window to become only title-bar
-    bool                    CollapseToggleWanted;
+    bool                    WantCollapseToggle;
     bool                    SkipItems;                          // Set when items can safely be all clipped (e.g. window not visible or collapsed)
     bool                    Appearing;                          // Set during the frame where the window is appearing (or re-appearing)
     bool                    Hidden;                             // Do not display (== (HiddenFramesForResize > 0) ||
     bool                    HasCloseButton;                     // Set when the window has a close button (p_open != NULL)
-    int                     BeginOrderWithinParent;             // Order within immediate parent window, if we are a child window. Otherwise 0.
-    int                     BeginOrderWithinContext;            // Order within entire imgui context. This is mostly used for debugging submission order related issues.
-    int                     BeginCount;                         // Number of Begin() during the current frame (generally 0 or 1, 1+ if appending via multiple Begin/End pairs)
+    signed char             ResizeBorderHeld;                   // Current border being held for resize (-1: none, otherwise 0-3)
+    short                   BeginCount;                         // Number of Begin() during the current frame (generally 0 or 1, 1+ if appending via multiple Begin/End pairs)
+    short                   BeginOrderWithinParent;             // Order within immediate parent window, if we are a child window. Otherwise 0.
+    short                   BeginOrderWithinContext;            // Order within entire imgui context. This is mostly used for debugging submission order related issues.
     ImGuiID                 PopupId;                            // ID in the popup stack when this window is used as a popup/menu (because we use generic Name/ID for recycling)
     int                     AutoFitFramesX, AutoFitFramesY;
     bool                    AutoFitOnlyGrows;
@@ -1022,8 +1195,8 @@ struct IMGUI_API ImGuiWindow
     ImGuiWindow*            RootWindowForNav;                   // Point to ourself or first ancestor which doesn't have the NavFlattened flag.
 
     ImGuiWindow*            NavLastChildNavWindow;              // When going to the menu bar, we remember the child window we came from. (This could probably be made implicit if we kept g.Windows sorted by last focused including child window.)
-    ImGuiID                 NavLastIds[2];                      // Last known NavId for this window, per layer (0/1)
-    ImRect                  NavRectRel[2];                      // Reference rectangle, in window relative space
+    ImGuiID                 NavLastIds[ImGuiNavLayer_COUNT];    // Last known NavId for this window, per layer (0/1)
+    ImRect                  NavRectRel[ImGuiNavLayer_COUNT];    // Reference rectangle, in window relative space
 
     // Navigation / Focus
     // FIXME-NAV: Merge all this with the new Nav system, at least the request variables should be moved to ImGuiContext
@@ -1041,6 +1214,7 @@ public:
     ImGuiID     GetID(const char* str, const char* str_end = NULL);
     ImGuiID     GetID(const void* ptr);
     ImGuiID     GetIDNoKeepAlive(const char* str, const char* str_end = NULL);
+    ImGuiID     GetIDNoKeepAlive(const void* ptr);
     ImGuiID     GetIDFromRectangle(const ImRect& r_abs);
 
     // We don't use g.FontSize because the window may be != g.CurrentWidow.
@@ -1066,6 +1240,71 @@ struct ImGuiItemHoveredDataBackup
 };
 
 //-----------------------------------------------------------------------------
+// Tab bar, tab item
+//-----------------------------------------------------------------------------
+
+enum ImGuiTabBarFlagsPrivate_
+{
+    ImGuiTabBarFlags_DockNode                   = 1 << 20,  // Part of a dock node
+    ImGuiTabBarFlags_IsFocused                  = 1 << 21,
+    ImGuiTabBarFlags_SaveSettings               = 1 << 22   // FIXME: Settings are handled by the docking system, this only request the tab bar to mark settings dirty when reordering tabs
+};
+
+enum ImGuiTabItemFlagsPrivate_
+{
+    ImGuiTabItemFlags_NoCloseButton             = 1 << 20   // Store whether p_open is set or not, which we need to recompute WidthContents during layout.
+};
+
+// Storage for one active tab item (sizeof() 26~32 bytes)
+struct ImGuiTabItem
+{
+    ImGuiID             ID;
+    ImGuiTabItemFlags   Flags;
+    int                 LastFrameVisible;
+    int                 LastFrameSelected;      // This allows us to infer an ordered list of the last activated tabs with little maintenance
+    int                 NameOffset;             // When Window==NULL, offset to name within parent ImGuiTabBar::TabsNames
+    float               Offset;                 // Position relative to beginning of tab
+    float               Width;                  // Width currently displayed
+    float               WidthContents;          // Width of actual contents, stored during BeginTabItem() call
+
+    ImGuiTabItem()      { ID = Flags = 0; LastFrameVisible = LastFrameSelected = -1; NameOffset = -1; Offset = Width = WidthContents = 0.0f; }
+};
+
+// Storage for a tab bar (sizeof() 92~96 bytes)
+struct ImGuiTabBar
+{
+    ImVector<ImGuiTabItem> Tabs;
+    ImGuiID             ID;                     // Zero for tab-bars used by docking
+    ImGuiID             SelectedTabId;          // Selected tab
+    ImGuiID             NextSelectedTabId;
+    ImGuiID             VisibleTabId;           // Can occasionally be != SelectedTabId (e.g. when previewing contents for CTRL+TAB preview)
+    int                 CurrFrameVisible;
+    int                 PrevFrameVisible;
+    ImRect              BarRect;
+    float               ContentsHeight;
+    float               OffsetMax;              // Distance from BarRect.Min.x, locked during layout
+    float               OffsetNextTab;          // Distance from BarRect.Min.x, incremented with each BeginTabItem() call, not used if ImGuiTabBarFlags_Reorderable if set.
+    float               ScrollingAnim;
+    float               ScrollingTarget;
+    ImGuiTabBarFlags    Flags;
+    ImGuiID             ReorderRequestTabId;
+    int                 ReorderRequestDir;
+    bool                WantLayout;
+    bool                VisibleTabWasSubmitted;
+    short               LastTabItemIdx;         // For BeginTabItem()/EndTabItem()
+    ImVec2              FramePadding;           // style.FramePadding locked at the time of BeginTabBar()
+    ImGuiTextBuffer     TabsNames;              // For non-docking tab bar we re-append names in a contiguous buffer.
+
+    ImGuiTabBar();
+    int                 GetTabOrder(const ImGuiTabItem* tab) const  { return Tabs.index_from_ptr(tab); }
+    const char*         GetTabName(const ImGuiTabItem* tab) const
+    {
+        IM_ASSERT(tab->NameOffset != -1 && tab->NameOffset < TabsNames.Buf.Size);
+        return TabsNames.Buf.Data + tab->NameOffset;
+    }
+};
+
+//-----------------------------------------------------------------------------
 // Internal API
 // No guarantee of forward compatibility here.
 //-----------------------------------------------------------------------------
@@ -1078,13 +1317,26 @@ namespace ImGui
     // - You are calling ImGui functions after ImGui::EndFrame()/ImGui::Render() and before the next ImGui::NewFrame(), which is also illegal.
     inline    ImGuiWindow*  GetCurrentWindowRead()      { ImGuiContext& g = *GImGui; return g.CurrentWindow; }
     inline    ImGuiWindow*  GetCurrentWindow()          { ImGuiContext& g = *GImGui; g.CurrentWindow->WriteAccessed = true; return g.CurrentWindow; }
+    IMGUI_API ImGuiWindow*  FindWindowByID(ImGuiID id);
     IMGUI_API ImGuiWindow*  FindWindowByName(const char* name);
     IMGUI_API void          FocusWindow(ImGuiWindow* window);
-    IMGUI_API void          BringWindowToFront(ImGuiWindow* window);
-    IMGUI_API void          BringWindowToBack(ImGuiWindow* window);
+    IMGUI_API void          FocusPreviousWindowIgnoringOne(ImGuiWindow* ignore_window);
+    IMGUI_API void          BringWindowToFocusFront(ImGuiWindow* window);
+    IMGUI_API void          BringWindowToDisplayFront(ImGuiWindow* window);
+    IMGUI_API void          BringWindowToDisplayBack(ImGuiWindow* window);
     IMGUI_API void          UpdateWindowParentAndRootLinks(ImGuiWindow* window, ImGuiWindowFlags flags, ImGuiWindow* parent_window);
+    IMGUI_API ImVec2        CalcWindowExpectedSize(ImGuiWindow* window);
     IMGUI_API bool          IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent);
     IMGUI_API bool          IsWindowNavFocusable(ImGuiWindow* window);
+    IMGUI_API void          SetWindowScrollX(ImGuiWindow* window, float new_scroll_x);
+    IMGUI_API void          SetWindowScrollY(ImGuiWindow* window, float new_scroll_y);
+    IMGUI_API float         GetWindowScrollMaxX(ImGuiWindow* window);
+    IMGUI_API float         GetWindowScrollMaxY(ImGuiWindow* window);
+    IMGUI_API ImRect        GetWindowAllowedExtentRect(ImGuiWindow* window);
+    IMGUI_API void          SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond);
+    IMGUI_API void          SetWindowSize(ImGuiWindow* window, const ImVec2& size, ImGuiCond cond);
+    IMGUI_API void          SetWindowCollapsed(ImGuiWindow* window, bool collapsed, ImGuiCond cond);
+
     IMGUI_API void          SetCurrentFont(ImFont* font);
     inline ImFont*          GetDefaultFont() { ImGuiContext& g = *GImGui; return g.IO.FontDefault ? g.IO.FontDefault : g.IO.Fonts->Fonts[0]; }
 
@@ -1095,13 +1347,16 @@ namespace ImGui
     // NewFrame
     IMGUI_API void          UpdateHoveredWindowAndCaptureFlags();
     IMGUI_API void          StartMouseMovingWindow(ImGuiWindow* window);
-    IMGUI_API void          UpdateMouseMovingWindow();
+    IMGUI_API void          UpdateMouseMovingWindowNewFrame();
+    IMGUI_API void          UpdateMouseMovingWindowEndFrame();
 
     // Settings
     IMGUI_API void                  MarkIniSettingsDirty();
     IMGUI_API void                  MarkIniSettingsDirty(ImGuiWindow* window);
-    IMGUI_API ImGuiSettingsHandler* FindSettingsHandler(const char* type_name);
+    IMGUI_API ImGuiWindowSettings*  CreateNewWindowSettings(const char* name);
     IMGUI_API ImGuiWindowSettings*  FindWindowSettings(ImGuiID id);
+    IMGUI_API ImGuiWindowSettings*  FindOrCreateWindowSettings(const char* name);
+    IMGUI_API ImGuiSettingsHandler* FindSettingsHandler(const char* type_name);
 
     // Basic Accessors
     inline ImGuiID          GetItemID()     { ImGuiContext& g = *GImGui; return g.CurrentWindow->DC.LastItemId; }
@@ -1113,7 +1368,7 @@ namespace ImGui
     IMGUI_API ImGuiID       GetHoveredID();
     IMGUI_API void          SetHoveredID(ImGuiID id);
     IMGUI_API void          KeepAliveID(ImGuiID id);
-    IMGUI_API void          MarkItemValueChanged(ImGuiID id);
+    IMGUI_API void          MarkItemEdited(ImGuiID id);
 
     // Basic Helpers for widget code
     IMGUI_API void          ItemSize(const ImVec2& size, float text_offset_y = 0.0f);
@@ -1121,7 +1376,7 @@ namespace ImGui
     IMGUI_API bool          ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb = NULL);
     IMGUI_API bool          ItemHoverable(const ImRect& bb, ImGuiID id);
     IMGUI_API bool          IsClippedEx(const ImRect& bb, ImGuiID id, bool clip_even_when_logged);
-    IMGUI_API bool          FocusableItemRegister(ImGuiWindow* window, ImGuiID id, bool tab_stop = true);      // Return true if focus is requested
+    IMGUI_API bool          FocusableItemRegister(ImGuiWindow* window, ImGuiID id, bool tab_stop = true);   // Return true if focus is requested
     IMGUI_API void          FocusableItemUnregister(ImGuiWindow* window);
     IMGUI_API ImVec2        CalcItemSize(ImVec2 size, float default_x, float default_y);
     IMGUI_API float         CalcWrapWidthForPos(const ImVec2& pos, float wrap_pos_x);
@@ -1131,16 +1386,18 @@ namespace ImGui
 
     // Popups, Modals, Tooltips
     IMGUI_API void          OpenPopupEx(ImGuiID id);
-    IMGUI_API void          ClosePopup(ImGuiID id);
-    IMGUI_API void          ClosePopupToLevel(int remaining);
+    IMGUI_API void          ClosePopupToLevel(int remaining, bool apply_focus_to_window_under);
     IMGUI_API void          ClosePopupsOverWindow(ImGuiWindow* ref_window);
-    IMGUI_API bool          IsPopupOpen(ImGuiID id);
+    IMGUI_API bool          IsPopupOpen(ImGuiID id); // Test for id within current popup stack level (currently begin-ed into); this doesn't scan the whole popup stack!
     IMGUI_API bool          BeginPopupEx(ImGuiID id, ImGuiWindowFlags extra_flags);
     IMGUI_API void          BeginTooltipEx(ImGuiWindowFlags extra_flags, bool override_previous_tooltip = true);
     IMGUI_API ImGuiWindow*  GetFrontMostPopupModal();
+    IMGUI_API ImVec2        FindBestWindowPosForPopup(ImGuiWindow* window);
+    IMGUI_API ImVec2        FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& size, ImGuiDir* last_dir, const ImRect& r_outer, const ImRect& r_avoid, ImGuiPopupPositionPolicy policy = ImGuiPopupPositionPolicy_Default);
 
     // Navigation
     IMGUI_API void          NavInitWindow(ImGuiWindow* window, bool force_reinit);
+    IMGUI_API bool          NavMoveRequestButNoResultYet();
     IMGUI_API void          NavMoveRequestCancel();
     IMGUI_API void          NavMoveRequestForward(ImGuiDir move_dir, ImGuiDir clip_dir, const ImRect& bb_rel, ImGuiNavMoveFlags move_flags);
     IMGUI_API void          NavMoveRequestTryWrapping(ImGuiWindow* window, ImGuiNavMoveFlags move_flags);
@@ -1148,6 +1405,14 @@ namespace ImGui
     IMGUI_API ImVec2        GetNavInputAmount2d(ImGuiNavDirSourceFlags dir_sources, ImGuiInputReadMode mode, float slow_factor = 0.0f, float fast_factor = 0.0f);
     IMGUI_API int           CalcTypematicPressedRepeatAmount(float t, float t_prev, float repeat_delay, float repeat_rate);
     IMGUI_API void          ActivateItem(ImGuiID id);   // Remotely activate a button, checkbox, tree node etc. given its unique ID. activation is queued and processed on the next frame when the item is encountered again.
+    IMGUI_API void          SetNavID(ImGuiID id, int nav_layer);
+    IMGUI_API void          SetNavIDWithRectRel(ImGuiID id, int nav_layer, const ImRect& rect_rel);
+
+    // Inputs
+    inline bool             IsKeyPressedMap(ImGuiKey key, bool repeat = true)           { const int key_index = GImGui->IO.KeyMap[key]; return (key_index >= 0) ? IsKeyPressed(key_index, repeat) : false; }
+    inline bool             IsNavInputDown(ImGuiNavInput n)                             { return GImGui->IO.NavInputs[n] > 0.0f; }
+    inline bool             IsNavInputPressed(ImGuiNavInput n, ImGuiInputReadMode mode) { return GetNavInputAmount(n, mode) > 0.0f; }
+    inline bool             IsNavInputPressedAnyOfTwo(ImGuiNavInput n1, ImGuiNavInput n2, ImGuiInputReadMode mode) { return (GetNavInputAmount(n1, mode) + GetNavInputAmount(n2, mode)) > 0.0f; }
 
     // Drag and Drop
     IMGUI_API bool          BeginDragDropTargetCustom(const ImRect& bb, ImGuiID id);
@@ -1159,22 +1424,39 @@ namespace ImGui
     IMGUI_API void          EndColumns();                                                             // close columns
     IMGUI_API void          PushColumnClipRect(int column_index = -1);
 
+    // Tab Bars
+    IMGUI_API bool          BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& bb, ImGuiTabBarFlags flags);
+    IMGUI_API ImGuiTabItem* TabBarFindTabByID(ImGuiTabBar* tab_bar, ImGuiID tab_id);
+    IMGUI_API void          TabBarRemoveTab(ImGuiTabBar* tab_bar, ImGuiID tab_id);
+    IMGUI_API void          TabBarCloseTab(ImGuiTabBar* tab_bar, ImGuiTabItem* tab);
+    IMGUI_API void          TabBarQueueChangeTabOrder(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, int dir);
+    IMGUI_API bool          TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open, ImGuiTabItemFlags flags);
+    IMGUI_API ImVec2        TabItemCalcSize(const char* label, bool has_close_button);
+    IMGUI_API void          TabItemBackground(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImU32 col);
+    IMGUI_API bool          TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImVec2 frame_padding, const char* label, ImGuiID tab_id, ImGuiID close_button_id);
+
     // Render helpers
     // AVOID USING OUTSIDE OF IMGUI.CPP! NOT FOR PUBLIC CONSUMPTION. THOSE FUNCTIONS ARE A MESS. THEIR SIGNATURE AND BEHAVIOR WILL CHANGE, THEY NEED TO BE REFACTORED INTO SOMETHING DECENT.
-    // NB: All position are in absolute pixels coordinates (never using window coordinates internally)
+    // NB: All position are in absolute pixels coordinates (we are never using window coordinates internally)
     IMGUI_API void          RenderText(ImVec2 pos, const char* text, const char* text_end = NULL, bool hide_text_after_hash = true);
     IMGUI_API void          RenderTextWrapped(ImVec2 pos, const char* text, const char* text_end, float wrap_width);
     IMGUI_API void          RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0,0), const ImRect* clip_rect = NULL);
+    IMGUI_API void          RenderTextClippedEx(ImDrawList* draw_list, const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0, 0), const ImRect* clip_rect = NULL);
     IMGUI_API void          RenderFrame(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, bool border = true, float rounding = 0.0f);
     IMGUI_API void          RenderFrameBorder(ImVec2 p_min, ImVec2 p_max, float rounding = 0.0f);
     IMGUI_API void          RenderColorRectWithAlphaCheckerboard(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, float grid_step, ImVec2 grid_off, float rounding = 0.0f, int rounding_corners_flags = ~0);
     IMGUI_API void          RenderArrow(ImVec2 pos, ImGuiDir dir, float scale = 1.0f);
-    IMGUI_API void          RenderArrowPointingAt(ImDrawList* draw_list, ImVec2 pos, ImVec2 half_sz, ImGuiDir direction, ImU32 col);
     IMGUI_API void          RenderBullet(ImVec2 pos);
     IMGUI_API void          RenderCheckMark(ImVec2 pos, ImU32 col, float sz);
     IMGUI_API void          RenderNavHighlight(const ImRect& bb, ImGuiID id, ImGuiNavHighlightFlags flags = ImGuiNavHighlightFlags_TypeDefault); // Navigation highlight
-    IMGUI_API void          RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, ImU32 col, float x_start_norm, float x_end_norm, float rounding);
     IMGUI_API const char*   FindRenderedTextEnd(const char* text, const char* text_end = NULL); // Find the optional ## from which we stop displaying text.
+    IMGUI_API void          LogRenderedText(const ImVec2* ref_pos, const char* text, const char* text_end = NULL);
+
+    // Render helpers (those functions don't access any ImGui state!)
+    IMGUI_API void          RenderMouseCursor(ImDrawList* draw_list, ImVec2 pos, float scale, ImGuiMouseCursor mouse_cursor = ImGuiMouseCursor_Arrow);
+    IMGUI_API void          RenderArrowPointingAt(ImDrawList* draw_list, ImVec2 pos, ImVec2 half_sz, ImGuiDir direction, ImU32 col);
+    IMGUI_API void          RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, ImU32 col, float x_start_norm, float x_end_norm, float rounding);
+    IMGUI_API void          RenderPixelEllipsis(ImDrawList* draw_list, ImVec2 pos, int count, ImU32 col);
 
     // Widgets
     IMGUI_API bool          ButtonEx(const char* label, const ImVec2& size_arg = ImVec2(0,0), ImGuiButtonFlags flags = 0);
@@ -1182,28 +1464,41 @@ namespace ImGui
     IMGUI_API bool          CollapseButton(ImGuiID id, const ImVec2& pos);
     IMGUI_API bool          ArrowButtonEx(const char* str_id, ImGuiDir dir, ImVec2 size_arg, ImGuiButtonFlags flags);
     IMGUI_API void          Scrollbar(ImGuiLayoutType direction);
+    IMGUI_API ImGuiID       GetScrollbarID(ImGuiLayoutType direction);
     IMGUI_API void          VerticalSeparator();        // Vertical separator, for menu bars (use current line height). Not exposed because it is misleading and it doesn't have an effect on regular layout.
 
     // Widgets low-level behaviors
     IMGUI_API bool          ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool* out_held, ImGuiButtonFlags flags = 0);
-    IMGUI_API bool          DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_speed, const void* v_min, const void* v_max, const char* format, float power);
-    IMGUI_API bool          SliderBehavior(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, void* v, const void* v_min, const void* v_max, const char* format, float power, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_speed, const void* v_min, const void* v_max, const char* format, float power, ImGuiDragFlags flags);
+    IMGUI_API bool          SliderBehavior(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, void* v, const void* v_min, const void* v_max, const char* format, float power, ImGuiSliderFlags flags, ImRect* out_grab_bb);
     IMGUI_API bool          SplitterBehavior(const ImRect& bb, ImGuiID id, ImGuiAxis axis, float* size1, float* size2, float min_size1, float min_size2, float hover_extend = 0.0f, float hover_visibility_delay = 0.0f);
     IMGUI_API bool          TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* label, const char* label_end = NULL);
     IMGUI_API bool          TreeNodeBehaviorIsOpen(ImGuiID id, ImGuiTreeNodeFlags flags = 0);                     // Consume previous SetNextTreeNodeOpened() data, if any. May return true when logging
     IMGUI_API void          TreePushRawID(ImGuiID id);
 
-    IMGUI_API bool          InputTextEx(const char* label, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiTextEditCallback callback = NULL, void* user_data = NULL);
+    // Template functions are instantiated in imgui_widgets.cpp for a finite number of types.
+    // To use them externally (for custom widget) you may need an "extern template" statement in your code in order to link to existing instances and silence Clang warnings (see #2036).
+    // e.g. " extern template IMGUI_API float RoundScalarWithFormatT<float, float>(const char* format, ImGuiDataType data_type, float v); "
+    template<typename T, typename SIGNED_T, typename FLOAT_T>   IMGUI_API bool  DragBehaviorT(ImGuiDataType data_type, T* v, float v_speed, const T v_min, const T v_max, const char* format, float power, ImGuiDragFlags flags);
+    template<typename T, typename SIGNED_T, typename FLOAT_T>   IMGUI_API bool  SliderBehaviorT(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, T* v, const T v_min, const T v_max, const char* format, float power, ImGuiSliderFlags flags, ImRect* out_grab_bb);
+    template<typename T, typename FLOAT_T>                      IMGUI_API float SliderCalcRatioFromValueT(ImGuiDataType data_type, T v, T v_min, T v_max, float power, float linear_zero_pos);
+    template<typename T, typename SIGNED_T>                     IMGUI_API T     RoundScalarWithFormatT(const char* format, ImGuiDataType data_type, T v);
+
+    // InputText
+    IMGUI_API bool          InputTextEx(const char* label, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
     IMGUI_API bool          InputScalarAsWidgetReplacement(const ImRect& bb, ImGuiID id, const char* label, ImGuiDataType data_type, void* data_ptr, const char* format);
 
+    // Color
     IMGUI_API void          ColorTooltip(const char* text, const float* col, ImGuiColorEditFlags flags);
     IMGUI_API void          ColorEditOptionsPopup(const float* col, ImGuiColorEditFlags flags);
+    IMGUI_API void          ColorPickerOptionsPopup(const float* ref_col, ImGuiColorEditFlags flags);
 
-    IMGUI_API void          PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 graph_size);
+    // Plot
+    IMGUI_API void          PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 frame_size);
 
     // Shade functions (write over already created vertices)
-    IMGUI_API void          ShadeVertsLinearColorGradientKeepAlpha(ImDrawVert* vert_start, ImDrawVert* vert_end, ImVec2 gradient_p0, ImVec2 gradient_p1, ImU32 col0, ImU32 col1);
-    IMGUI_API void          ShadeVertsLinearUV(ImDrawVert* vert_start, ImDrawVert* vert_end, const ImVec2& a, const ImVec2& b, const ImVec2& uv_a, const ImVec2& uv_b, bool clamp);
+    IMGUI_API void          ShadeVertsLinearColorGradientKeepAlpha(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, ImVec2 gradient_p0, ImVec2 gradient_p1, ImU32 col0, ImU32 col1);
+    IMGUI_API void          ShadeVertsLinearUV(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, const ImVec2& a, const ImVec2& b, const ImVec2& uv_a, const ImVec2& uv_b, bool clamp);
 
 } // namespace ImGui
 
@@ -1211,11 +1506,23 @@ namespace ImGui
 IMGUI_API bool              ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas);
 IMGUI_API void              ImFontAtlasBuildRegisterDefaultCustomRects(ImFontAtlas* atlas);
 IMGUI_API void              ImFontAtlasBuildSetupFont(ImFontAtlas* atlas, ImFont* font, ImFontConfig* font_config, float ascent, float descent);
-IMGUI_API void              ImFontAtlasBuildPackCustomRects(ImFontAtlas* atlas, void* spc);
+IMGUI_API void              ImFontAtlasBuildPackCustomRects(ImFontAtlas* atlas, void* stbrp_context_opaque);
 IMGUI_API void              ImFontAtlasBuildFinish(ImFontAtlas* atlas);
 IMGUI_API void              ImFontAtlasBuildMultiplyCalcLookupTable(unsigned char out_table[256], float in_multiply_factor);
 IMGUI_API void              ImFontAtlasBuildMultiplyRectAlpha8(const unsigned char table[256], unsigned char* pixels, int x, int y, int w, int h, int stride);
 
+// Test engine hooks (imgui-test)
+//#define IMGUI_ENABLE_TEST_ENGINE
+#ifdef IMGUI_ENABLE_TEST_ENGINE
+extern void                 ImGuiTestEngineHook_PreNewFrame(ImGuiContext* ctx);
+extern void                 ImGuiTestEngineHook_PostNewFrame(ImGuiContext* ctx);
+extern void                 ImGuiTestEngineHook_ItemAdd(ImGuiContext* ctx, const ImRect& bb, ImGuiID id);
+extern void                 ImGuiTestEngineHook_ItemInfo(ImGuiContext* ctx, ImGuiID id, const char* label, ImGuiItemStatusFlags flags);
+#define IMGUI_TEST_ENGINE_ITEM_INFO(_ID, _LABEL, _FLAGS)  ImGuiTestEngineHook_ItemInfo(&g, _ID, _LABEL, _FLAGS)   // Register status flags
+#else
+#define IMGUI_TEST_ENGINE_ITEM_INFO(_ID, _LABEL, _FLAGS)  do { } while (0)
+#endif
+
 #ifdef __clang__
 #pragma clang diagnostic pop
 #endif