[ease] Added InspectorPane base class.

[Nate Stedman <natesm src gnome org>]

commit 122790c8e41d736a0e775ca5563091b467182934
Author: Nate Stedman <natesm gmail com>
Date:   Fri May 28 20:19:47 2010 -0400

    Added InspectorPane base class.
    
    Removes redundant "slide" property from subclasses. Virtual method added to
    replace the additional work that was done in those properties' setters.

 Makefile.am             |    1 +
 src/Inspector.vala      |    7 +++++++
 src/InspectorPane.vala  |   44 ++++++++++++++++++++++++++++++++++++++++++++
 src/SlidePane.vala      |    4 +---
 src/TransitionPane.vala |   34 +++++++++++++++-------------------
 5 files changed, 68 insertions(+), 22 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 239c2ab..80a596e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,6 +24,7 @@ ease_SOURCES = \
 	src/HTMLExporter.vala \
 	src/ImageActor.vala \
 	src/Inspector.vala\
+	src/InspectorPane.vala\
 	src/InspectorWindow.vala\
 	src/MainToolbar.vala \
 	src/Main.vala \
diff --git a/src/Inspector.vala b/src/Inspector.vala
index d0b7441..a267f51 100644
--- a/src/Inspector.vala
+++ b/src/Inspector.vala
@@ -15,12 +15,19 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+/**
+ * Inspector widget for editing slide properties
+ */
 public class Ease.Inspector : Gtk.Notebook
 {
 	private TransitionPane transition_pane;
 	private SlidePane slide_pane;
 	
 	private Slide slide_priv;
+	
+	/**
+	 * The { link Slide} that this Inspector is currently affecting.
+	 */
 	public Slide slide
 	{
 		get { return slide_priv; }
diff --git a/src/InspectorPane.vala b/src/InspectorPane.vala
new file mode 100644
index 0000000..0496992
--- /dev/null
+++ b/src/InspectorPane.vala
@@ -0,0 +1,44 @@
+/*  Ease, a GTK presentation application
+    Copyright (C) 2010 Nate Stedman
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * Base class for inspector panes
+ */
+public abstract class Ease.InspectorPane : Gtk.VBox
+{
+	private Slide slide_priv;
+
+	public Slide slide
+	{
+		get { return slide_priv; }
+		set {
+			slide_priv = value;
+			slide_updated();
+		}
+	}
+
+	public InspectorPane()
+	{
+		
+	}
+	
+	/**
+	 * Override this method to update interface elements when the displayed
+	 * slide changes.
+	 */
+	protected virtual void slide_updated() {}
+}
diff --git a/src/SlidePane.vala b/src/SlidePane.vala
index aa6359b..3586725 100644
--- a/src/SlidePane.vala
+++ b/src/SlidePane.vala
@@ -18,7 +18,7 @@
 /**
  * The inspector pane concerning slides
  */
-public class Ease.SlidePane : Gtk.VBox
+public class Ease.SlidePane : InspectorPane
 {
 	public Gtk.ComboBox effect;
 	public Gtk.SpinButton duration;
@@ -26,8 +26,6 @@ public class Ease.SlidePane : Gtk.VBox
 	public Gtk.Label variant_label;
 	public Gtk.ComboBox start_transition;
 	public Gtk.SpinButton delay;
-	
-	public Slide slide { get; set; }
 
 	public SlidePane()
 	{
diff --git a/src/TransitionPane.vala b/src/TransitionPane.vala
index 95b7f9b..d588b0a 100644
--- a/src/TransitionPane.vala
+++ b/src/TransitionPane.vala
@@ -19,7 +19,7 @@
 /**
  * The inspector pane for changing transitions
  */
-public class Ease.TransitionPane : Gtk.VBox
+public class Ease.TransitionPane : InspectorPane
 {
 	public Gtk.ComboBox effect;
 	private Gtk.SpinButton transition_time;
@@ -29,24 +29,6 @@ public class Ease.TransitionPane : Gtk.VBox
 	private Gtk.ComboBox start_transition;
 	private Gtk.SpinButton delay;
 	private GtkClutter.Embed preview;
-	
-	
-	private Slide slide_priv;
-	public Slide slide
-	{
-		get { return slide_priv; }
-		set {
-			slide_priv = value;
-			
-			transition_time.set_value(value.transition_time);
-			effect.set_active(Transitions.get_transition_id(slide.transition));
-			if (slide.variant != "" && slide.variant != null)
-			{
-				variant.set_active(Transitions.get_variant_id(slide.transition,
-				                                              slide.variant));
-			}
-		}
-	}
 
 	public TransitionPane()
 	{
@@ -175,5 +157,19 @@ public class Ease.TransitionPane : Gtk.VBox
 			}
 		});
 	}
+	
+	protected override void slide_updated()
+	{
+		// set transition time box
+		transition_time.set_value(slide.transition_time);
+		
+		// set effect and variant combo boxes
+		effect.set_active(Transitions.get_transition_id(slide.transition));
+		if (slide.variant != "" && slide.variant != null)
+		{
+			variant.set_active(Transitions.get_variant_id(slide.transition,
+			                                              slide.variant));
+		}
+	}
 }