[ease/text] Added "zoom" property to Actor.

[Nate Stedman <natesm src gnome org>]

commit 28c019a6892686dfef694766bbf8f39946e2232d
Author: Nate Stedman <natesm gmail com>
Date:   Mon Nov 29 15:36:36 2010 -0500

    Added "zoom" property to Actor.
    
    Allows Cairo-based actors to perform higher resolution renders to
    prevent pixelization/blurring. Also makes the editor rectangle
    always visible, even when zoomed out to 10%.

 ease-core/ease-actor.vala       |   13 +++++++++++++
 ease-core/ease-cairo-actor.vala |   12 +++++++++++-
 ease/ease-editor-embed.vala     |    5 +++++
 3 files changed, 29 insertions(+), 1 deletions(-)
---
diff --git a/ease-core/ease-actor.vala b/ease-core/ease-actor.vala
index 1493caa..01bca7a 100644
--- a/ease-core/ease-actor.vala
+++ b/ease-core/ease-actor.vala
@@ -75,6 +75,14 @@ public abstract class Ease.Actor : Clutter.Group
 	 * Whether or not the actor is currently in editing mode.
 	 */
 	public bool editing { get; set; default = false; }
+	
+	/**
+	 * The current zoom factor of the Actor. This refers to the size at which
+	 * the Actor is being displayed, typically in an editor view. Actors that
+	 * use Cairo rendering can use this properly to properly use Cairo's vector
+	 * nature to provide non-pixelated renderings at higher zoom levels.
+	 */
+	public float zoom { get; set; default = 1; }
 
 	/**
 	 * Instantiate a new Actor
@@ -100,6 +108,11 @@ public abstract class Ease.Actor : Clutter.Group
 			editor_rect.width = e.width;
 			editor_rect.height = e.height;
 			add_actor(editor_rect);
+			
+			notify["zoom"].connect(() => {
+				editor_rect.border_width =
+					(uint)Math.ceil(((1 / zoom) * RECT_WIDTH));
+			});
 		}
 		
 		// update the actor's position when changed in the element
diff --git a/ease-core/ease-cairo-actor.vala b/ease-core/ease-cairo-actor.vala
index 2a98bb4..f8087a8 100644
--- a/ease-core/ease-cairo-actor.vala
+++ b/ease-core/ease-cairo-actor.vala
@@ -39,15 +39,25 @@ public class Ease.CairoActor : Actor
 		
 		// draw at full resolution again once redraw is complete
 		notify["resizing"].connect(() => { if (!resizing) draw(); });
+		
+		// render when zooming
+		notify["zoom"].connect(() => {
+			if (zoom > 1) draw();
+		});
 	}
 	
 	internal void draw()
 	{
-		tex.set_surface_size((uint)element.width, (uint)element.height);
+		// only rescale if zoom is larger than 1
+		var render_zoom = zoom > 1 ? zoom : 1;
+		
+		tex.set_surface_size((uint)(element.width * render_zoom),
+		                     (uint)(element.height * render_zoom));
 		tex.clear();
 		var cr = tex.create();
 		try
 		{
+			cr.scale(render_zoom, render_zoom);
 			element.cairo_render(cr, resizing);
 		}
 		catch (Error e)
diff --git a/ease/ease-editor-embed.vala b/ease/ease-editor-embed.vala
index f56ad07..1a72415 100644
--- a/ease/ease-editor-embed.vala
+++ b/ease/ease-editor-embed.vala
@@ -397,6 +397,11 @@ internal class Ease.EditorEmbed : ScrolledEmbedWindow, UndoSource
 			return;
 		}
 		
+		foreach (var actor in slide_actor.contents)
+		{
+			(actor as Actor).zoom = zoom;
+		}
+		
 		var w = zoom * slide_actor.slide.width;
 		var h = zoom * slide_actor.slide.height;