[hyena] [Hyena.Gui] New GrabHandle widget

[Gabriel Burt <gburt src gnome org>]

commit 37c984fc7254403c5ca8ed0095616f3af9715e79
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Wed Oct 13 16:35:14 2010 -0500

    [Hyena.Gui] New GrabHandle widget

 Hyena.Gui/Hyena.Gui.csproj            |    1 +
 Hyena.Gui/Hyena.Widgets/GrabHandle.cs |   90 +++++++++++++++++++++++++++++++++
 Hyena.Gui/Makefile.am                 |    1 +
 3 files changed, 92 insertions(+), 0 deletions(-)
---
diff --git a/Hyena.Gui/Hyena.Gui.csproj b/Hyena.Gui/Hyena.Gui.csproj
index a428722..37f0e6b 100644
--- a/Hyena.Gui/Hyena.Gui.csproj
+++ b/Hyena.Gui/Hyena.Gui.csproj
@@ -178,6 +178,7 @@
     <Compile Include="Hyena.Gui\ActionManager.cs" />
     <Compile Include="Hyena.Gui\HyenaActionGroup.cs" />
     <Compile Include="Hyena.Widgets\GenericToolItem.cs" />
+    <Compile Include="Hyena.Widgets\GrabHandle.cs" />
     <Compile Include="Hyena.Widgets\HigMessageDialog.cs" />
     <Compile Include="Hyena.Widgets\EntryPopup.cs" />
     <Compile Include="Hyena.Widgets\SimpleTable.cs" />
diff --git a/Hyena.Gui/Hyena.Widgets/GrabHandle.cs b/Hyena.Gui/Hyena.Widgets/GrabHandle.cs
new file mode 100644
index 0000000..82e1e90
--- /dev/null
+++ b/Hyena.Gui/Hyena.Widgets/GrabHandle.cs
@@ -0,0 +1,90 @@
+//
+// GrabHandle.cs
+//
+// Author:
+//   Gabriel Burt <gburt novell com>
+//
+// Copyright (C) 2010 Novell, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using Gtk;
+
+namespace Hyena.Widgets
+{
+    public class GrabHandle : EventBox
+    {
+        Gtk.DrawingArea da;
+
+        public GrabHandle () : this (5, 28) {}
+
+        public GrabHandle (int w, int h)
+        {
+            da = new DrawingArea ();
+            da.SetSizeRequest (w, h);
+            Orientation = Gtk.Orientation.Vertical;
+
+            Child = da;
+            ShowAll ();
+
+            ButtonPressEvent += (o, a) => Dragging = true;
+            ButtonReleaseEvent += (o, a) => Dragging = false;
+            EnterNotifyEvent += (o, a) => Inside = true;
+            LeaveNotifyEvent += (o, a) => Inside = false;
+
+            da.ExposeEvent += (o, a) => {
+                if (da.IsDrawable) {
+                    Gtk.Style.PaintHandle (da.Style, da.GdkWindow, da.State, ShadowType.In,
+                        a.Event.Area, this, "entry", 0, 0, da.Allocation.Width, da.Allocation.Height, Orientation);
+                }
+            };
+        }
+
+        public void ControlWidthOf (Widget widget, int min, int max, bool grabberOnRight)
+        {
+            MotionNotifyEvent += (o, a) => {
+                var x = a.Event.X;
+                var w = Math.Min (max, Math.Max (min, widget.WidthRequest + (grabberOnRight ? 1 : -1 ) * x));
+                widget.WidthRequest = (int)w;
+            };
+        }
+
+        public Gtk.Orientation Orientation { get; set; }
+
+        private bool inside, dragging;
+        private bool Inside {
+            set {
+                inside = value;
+                GdkWindow.Cursor = dragging || inside ? resize_cursor : null;
+            }
+        }
+
+        private bool Dragging {
+            set {
+                dragging = value;
+                GdkWindow.Cursor = dragging || inside ? resize_cursor : null;
+            }
+        }
+
+        private static Gdk.Cursor resize_cursor = new Gdk.Cursor (Gdk.CursorType.SbHDoubleArrow);
+    }
+}
diff --git a/Hyena.Gui/Makefile.am b/Hyena.Gui/Makefile.am
index 756ac3e..a3a5018 100644
--- a/Hyena.Gui/Makefile.am
+++ b/Hyena.Gui/Makefile.am
@@ -103,6 +103,7 @@ SOURCES =  \
 	Hyena.Widgets/ComplexMenuItem.cs \
 	Hyena.Widgets/EntryPopup.cs \
 	Hyena.Widgets/GenericToolItem.cs \
+	Hyena.Widgets/GrabHandle.cs \
 	Hyena.Widgets/HigMessageDialog.cs \
 	Hyena.Widgets/ImageButton.cs \
 	Hyena.Widgets/MenuButton.cs \