1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* compositor_example.c
* Copyright (C) John Stebbins 2008-2016 <stebbins@stebbins>
*
* compositor_example.c is free software.
*
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* compositor_example.c is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with callbacks.h. If not, write to:
* The Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301, USA.
*/
#include <gtk/gtk.h>
#include "ghbcompositor.h"
// GhbCompositor example
int
main(gint argc, gchar *argv[])
{
GtkWidget *window;
GtkWidget *blender;
GtkWidget *eb_bottom;
GtkWidget *eb_top1;
GtkWidget *eb_top2;
GtkWidget *eb_top3;
GtkWidget *bottom;
GtkWidget *top1;
GtkWidget *top2;
GtkWidget *top3;
GtkWidget *table;
GtkWidget *image;
gtk_init(&argc, &argv);
// Make the top level window
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
// Only widgets that have a GdkDrawing area can be composited
// These would be GtkEventBox or GtkDrawingArea
// Create the widgets that will be composited
eb_bottom = gtk_event_box_new();
eb_top1 = gtk_event_box_new();
eb_top2 = gtk_event_box_new();
eb_top3 = gtk_event_box_new();
// Create the compositor
blender = ghb_compositor_new();
// Create an button to put on the bottom layer
bottom = gtk_button_new_with_label("Bottom");
image = gtk_image_new_from_stock("gtk-help", 6);
gtk_button_set_image(GTK_BUTTON(bottom), image);
// The button must be placed inside an event box since
// buttons do not have their own window.
gtk_container_add(GTK_CONTAINER(eb_bottom), bottom);
// Create the buttons that will be visible on the top layer
top1 = gtk_button_new_with_label("Top 1");
top2 = gtk_button_new_with_label("Top 2");
top3 = gtk_button_new_with_label("Top 3");
// The buttons must be placed inside an event box since
// buttons do not have their own window.
gtk_container_add(GTK_CONTAINER(eb_top1), top1);
gtk_container_add(GTK_CONTAINER(eb_top2), top2);
gtk_container_add(GTK_CONTAINER(eb_top3), top3);
// Create the table that will be the top layer
// Using a layout widget gives flexibility in the layout of the layer
table = gtk_table_new(3, 3, TRUE);
gtk_table_attach(GTK_TABLE(table), eb_top1, 0, 1, 0, 1, 0, 0, 0, 0);
gtk_table_attach(GTK_TABLE(table), eb_top2, 1, 2, 1, 2, 0, 0, 0, 0);
gtk_table_attach(GTK_TABLE(table), eb_top3, 2, 3, 2, 3, 0, 0, 0, 0);
// Add the blender to the main window.
gtk_container_add(GTK_CONTAINER(window), blender);
// Set the blenders zlist, with opacity values
// Bottom layer is opaque, top layer 60%
ghb_compositor_zlist_insert(GHB_COMPOSITOR(blender), eb_bottom, 1, 1);
ghb_compositor_zlist_insert(GHB_COMPOSITOR(blender), table, 2, 0.6);
// Start the show
gtk_widget_show_all(window);
gtk_main();
return 0;
}
|
