From ab78d646ad7feb94e534c50f9e6386ba87edd9cb Mon Sep 17 00:00:00 2001
From: sr55 <sr55.hb@outlook.com>
Date: Sun, 30 Sep 2012 14:18:23 +0000
Subject: WinGui: Cancel Scan menu option now greyed out when not scan running.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@4998 b64f7644-9d1e-0410-96f1-a4d463321fa5
---
 win/CS/HandBrakeWPF/Commands/CancelScanCommand.cs | 105 ++++++++++++++++++++++
 win/CS/HandBrakeWPF/HandBrakeWPF.csproj           |   1 +
 win/CS/HandBrakeWPF/ViewModels/MainViewModel.cs   |   6 ++
 win/CS/HandBrakeWPF/Views/MainView.xaml           |   2 +-
 4 files changed, 113 insertions(+), 1 deletion(-)
 create mode 100644 win/CS/HandBrakeWPF/Commands/CancelScanCommand.cs

(limited to 'win')

diff --git a/win/CS/HandBrakeWPF/Commands/CancelScanCommand.cs b/win/CS/HandBrakeWPF/Commands/CancelScanCommand.cs
new file mode 100644
index 000000000..617778b08
--- /dev/null
+++ b/win/CS/HandBrakeWPF/Commands/CancelScanCommand.cs
@@ -0,0 +1,105 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="CancelScanCommand.cs" company="HandBrake Project (http://handbrake.fr)">
+//   This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
+// </copyright>
+// <summary>
+//   Command to cancel a scan that is in progress
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace HandBrakeWPF.Commands
+{
+    using System;
+    using System.Windows.Input;
+
+    using HandBrake.ApplicationServices.Services.Interfaces;
+
+    /// <summary>
+    /// Command to cancel a scan that is in progress
+    /// </summary>
+    public class CancelScanCommand : ICommand
+    {
+        /// <summary>
+        /// The scan service wrapper.
+        /// </summary>
+        private readonly IScanServiceWrapper scanServiceWrapper;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CancelScanCommand"/> class.
+        /// </summary>
+        /// <param name="ssw">
+        /// The scan service wrapper.
+        /// </param>
+        public CancelScanCommand(IScanServiceWrapper ssw)
+        {
+            this.scanServiceWrapper = ssw;
+            this.scanServiceWrapper.ScanStared += this.ScanServiceWrapperScanStared;
+            this.scanServiceWrapper.ScanCompleted += this.ScanServiceWrapperScanCompleted;
+        }
+
+        /// <summary>
+        /// The scan service Scan Completed Event Handler.
+        /// Fires CanExecuteChanged
+        /// </summary>
+        /// <param name="sender">
+        /// The sender.
+        /// </param>
+        /// <param name="e">
+        /// The ScanCompletedEventArgs.
+        /// </param>
+        private void ScanServiceWrapperScanCompleted(object sender, HandBrake.ApplicationServices.EventArgs.ScanCompletedEventArgs e)
+        {
+            Caliburn.Micro.Execute.OnUIThread(() => this.CanExecuteChanged(sender, EventArgs.Empty));    
+        }
+
+        /// <summary>
+        /// The scan service scan started event handler.
+        /// Fires CanExecuteChanged
+        /// </summary>
+        /// <param name="sender">
+        /// The sender.
+        /// </param>
+        /// <param name="e">
+        /// The EventArgs.
+        /// </param>
+        private void ScanServiceWrapperScanStared(object sender, EventArgs e)
+        {
+            Caliburn.Micro.Execute.OnUIThread(() => this.CanExecuteChanged(sender, EventArgs.Empty));    
+        }
+
+        #region Implementation of ICommand
+
+        /// <summary>
+        /// Defines the method to be called when the command is invoked.
+        /// </summary>
+        /// <param name="parameter">Data used by the command.  If the command does not require data to be passed, this object can be set to null.</param>
+        public void Execute(object parameter)
+        {
+            this.scanServiceWrapper.Stop();
+        }
+
+        /// <summary>
+        /// Defines the method that determines whether the command can execute in its current state.
+        /// </summary>
+        /// <returns>
+        /// true if this command can be executed; otherwise, false.
+        /// </returns>
+        /// <param name="parameter">Data used by the command.  If the command does not require data to be passed, this object can be set to null.</param>
+        public bool CanExecute(object parameter)
+        {
+            if (this.scanServiceWrapper != null)
+            {
+                return this.scanServiceWrapper.IsScanning;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// The can execute changed.
+        /// </summary>
+        public event EventHandler CanExecuteChanged;
+
+        #endregion
+    }
+}
diff --git a/win/CS/HandBrakeWPF/HandBrakeWPF.csproj b/win/CS/HandBrakeWPF/HandBrakeWPF.csproj
index bae0eff7a..3597bb029 100644
--- a/win/CS/HandBrakeWPF/HandBrakeWPF.csproj
+++ b/win/CS/HandBrakeWPF/HandBrakeWPF.csproj
@@ -113,6 +113,7 @@
       <SubType>Designer</SubType>
     </ApplicationDefinition>
     <Compile Include="AttachedProperties\MenuItemExtensions.cs" />
+    <Compile Include="Commands\CancelScanCommand.cs" />
     <Compile Include="Commands\ProcessShortcutCommand.cs" />
     <Compile Include="Commands\SourceMenuCommand.cs" />
     <Compile Include="Controls\Loading.xaml.cs">
diff --git a/win/CS/HandBrakeWPF/ViewModels/MainViewModel.cs b/win/CS/HandBrakeWPF/ViewModels/MainViewModel.cs
index c2aef69ed..b68237883 100644
--- a/win/CS/HandBrakeWPF/ViewModels/MainViewModel.cs
+++ b/win/CS/HandBrakeWPF/ViewModels/MainViewModel.cs
@@ -219,6 +219,7 @@ namespace HandBrakeWPF.ViewModels
             this.queueProcessor.EncodeService.EncodeStatusChanged += this.EncodeStatusChanged;
 
             this.Presets = this.presetService.Presets;
+            this.CancelScanCommand = new CancelScanCommand(this.scanService);
         }
 
         #region View Model Properties
@@ -609,6 +610,11 @@ namespace HandBrakeWPF.ViewModels
            }
         }
 
+        /// <summary>
+        /// Gets or sets the cancel scan command.
+        /// </summary>
+        public CancelScanCommand CancelScanCommand { get; set; }
+
         #endregion
 
         #region Properties for Settings
diff --git a/win/CS/HandBrakeWPF/Views/MainView.xaml b/win/CS/HandBrakeWPF/Views/MainView.xaml
index 0ab5e87b9..ac4085146 100644
--- a/win/CS/HandBrakeWPF/Views/MainView.xaml
+++ b/win/CS/HandBrakeWPF/Views/MainView.xaml
@@ -95,7 +95,7 @@
                   VerticalAlignment="Top"
                   >
                 <MenuItem Header="File">
-                    <MenuItem Header="Cancel Scan" Micro:Message.Attach="[Event Click] = [Action CancelScan]" />
+                    <MenuItem Header="Cancel Scan" Command="{Binding CancelScanCommand}" />
                     <Separator />
                     <MenuItem Header="Exit" Micro:Message.Attach="[Event Click] = [Action ExitApplication]" />
                 </MenuItem>
-- 
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