[longomatch] Add some new events to inform about video window dragging.

[Andoni Morales Alastruey <amorales src gnome org>]

commit a56771920d9d233ef0f9e9a6320e7b5c3a06be84
Author: Julien Moutte <julien fluendo com>
Date:   Thu Apr 23 19:10:20 2015 +0200

    Add some new events to inform about video window dragging.
    
    We will use those to move the ROI.

 LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs  |   50 +++++++++++++++++++++++-
 LongoMatch.GUI.Multimedia/gtk-gui/gui.stetic  |    2 +
 LongoMatch.GUI.Multimedia/gtk-gui/objects.xml |    4 ++
 3 files changed, 53 insertions(+), 3 deletions(-)
---
diff --git a/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs b/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs
index efac1c4..5b66dbb 100644
--- a/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs
+++ b/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs
@@ -28,32 +28,47 @@ namespace LongoMatch.Gui
        {
                AspectFrame frame;
                DrawingArea drawingWindow;
+               bool dragStarted;
 
                public event EventHandler ReadyEvent;
                public new event ExposeEventHandler ExposeEvent;
                public new event ButtonPressEventHandler ButtonPressEvent;
+               public new event ButtonReleaseEventHandler ButtonReleaseEvent;
                public new event ScrollEventHandler ScrollEvent;
+               public event ButtonPressEventHandler VideoDragStarted;
+               public event ButtonReleaseEventHandler VideoDragStopped;
+               public new event MotionNotifyEventHandler VideoDragged;
 
                public VideoWindow ()
                {
                        this.Build ();
+
                        frame = new AspectFrame (null, 0.5f, 0.5f, 1f, false);
                        frame.Shadow = ShadowType.None;
 
                        messageLabel.NoShowAll = true;
+
                        drawingWindow = new DrawingArea ();
                        drawingWindow.DoubleBuffered = false;
                        drawingWindow.ExposeEvent += HandleExposeEvent;
+                       drawingWindow.MotionNotifyEvent += HandleMotionNotifyEvent;
+                       drawingWindow.ButtonPressEvent += HandleButtonPressEvent;
+                       drawingWindow.ButtonReleaseEvent += HandleButtonReleaseEvent;
+                       drawingWindow.AddEvents ((int)(Gdk.EventMask.ButtonPressMask | 
Gdk.EventMask.ButtonReleaseMask | Gdk.EventMask.PointerMotionMask | Gdk.EventMask.ScrollMask));
+
                        videoeventbox.ButtonPressEvent += HandleButtonPressEvent;
+                       videoeventbox.ButtonReleaseEvent += HandleButtonReleaseEvent;
                        videoeventbox.ScrollEvent += HandleScrollEvent;
                        videoeventbox.BorderWidth = 0;
                        if (Environment.OSVersion.Platform == PlatformID.Win32NT) {
                                // Workaround for GTK bugs on Windows not showing the video window
                                videoeventbox.VisibilityNotifyEvent += HandleVisibilityNotifyEvent;
                        }
+
                        frame.Add (drawingWindow);
                        videoeventbox.Add (frame);
                        videoeventbox.ShowAll ();
+
                        MessageVisible = false;
                }
 
@@ -111,12 +126,20 @@ namespace LongoMatch.Gui
                        set;
                }
 
+               void HandleMotionNotifyEvent (object o, MotionNotifyEventArgs args)
+               {
+                       if (dragStarted == true) {
+                               if (VideoDragged != null) {
+                                       VideoDragged (this, args);
+                               }
+                       }
+               }
+
                void HandleScrollEvent (object o, ScrollEventArgs args)
                {
                        if (ScrollEvent != null) {
                                ScrollEvent (this, args);
                        }
-                       
                }
 
                void HandleExposeEvent (object o, ExposeEventArgs args)
@@ -134,8 +157,29 @@ namespace LongoMatch.Gui
 
                void HandleButtonPressEvent (object o, ButtonPressEventArgs args)
                {
-                       if (ButtonPressEvent != null) {
-                               ButtonPressEvent (this, args);
+                       if (o == drawingWindow) {
+                               dragStarted = true;
+                               if (VideoDragStarted != null) {
+                                       VideoDragStarted (this, args);
+                               }
+                       } else {
+                               if (ButtonPressEvent != null) {
+                                       ButtonPressEvent (this, args);
+                               }
+                       }
+               }
+
+               void HandleButtonReleaseEvent (object o, ButtonReleaseEventArgs args)
+               {
+                       if (o == drawingWindow) {
+                               dragStarted = false;
+                               if (VideoDragStopped != null) {
+                                       VideoDragStopped (this, args);
+                               }
+                       } else {
+                               if (ButtonReleaseEvent != null) {
+                                       ButtonReleaseEvent (this, args);
+                               }
                        }
                }
 
diff --git a/LongoMatch.GUI.Multimedia/gtk-gui/gui.stetic b/LongoMatch.GUI.Multimedia/gtk-gui/gui.stetic
index 648adfa..963c278 100644
--- a/LongoMatch.GUI.Multimedia/gtk-gui/gui.stetic
+++ b/LongoMatch.GUI.Multimedia/gtk-gui/gui.stetic
@@ -93,6 +93,7 @@
                     <property name="MemberName" />
                     <property name="Visible">False</property>
                     <property name="Events">ButtonPressMask</property>
+                    <property name="Ratio">0</property>
                     <property name="Ready">False</property>
                   </widget>
                   <packing>
@@ -437,6 +438,7 @@
             <property name="MemberName" />
             <property name="Visible">False</property>
             <property name="Events">ButtonPressMask</property>
+            <property name="Ratio">0</property>
             <property name="Ready">False</property>
           </widget>
           <packing>
diff --git a/LongoMatch.GUI.Multimedia/gtk-gui/objects.xml b/LongoMatch.GUI.Multimedia/gtk-gui/objects.xml
index 98ea6dc..53e3a2c 100644
--- a/LongoMatch.GUI.Multimedia/gtk-gui/objects.xml
+++ b/LongoMatch.GUI.Multimedia/gtk-gui/objects.xml
@@ -27,6 +27,10 @@
         <signal name="ExposeEvent" />
         <signal name="ButtonPressEvent" />
         <signal name="ScrollEvent" />
+        <signal name="ButtonReleaseEvent" />
+        <signal name="VideoDragged" />
+        <signal name="VideoDragStarted" />
+        <signal name="VideoDragStopped" />
       </itemgroup>
     </signals>
   </object>