[mistelix] Use no preview images when browsing imaages and videos too

[Jordi Mas <jmas src gnome org>]

commit 1c41029ad895a3890c773a9a6b4df7c2071ec05b
Author: Jordi Mas <jmas softcatala org>
Date:   Tue Jul 7 20:52:37 2009 +0100

    Use no preview images when browsing imaages and videos too

 src/widgets/DataImageSurface.cs   |   26 ++++++++++++++++----------
 src/widgets/FileView.cs           |   22 +++++++++++++++++-----
 src/widgets/GtkUtils.cs           |   29 +++++++++++++++++++++++++++++
 src/widgets/SlideShowImageView.cs |   26 +-------------------------
 4 files changed, 63 insertions(+), 40 deletions(-)
---
diff --git a/src/widgets/DataImageSurface.cs b/src/widgets/DataImageSurface.cs
index 3d6cecc..54499cd 100644
--- a/src/widgets/DataImageSurface.cs
+++ b/src/widgets/DataImageSurface.cs
@@ -35,7 +35,7 @@ namespace Mistelix.Widgets
 		static int user_data_key = 0;
 		static cairo_destroy_func_t destroy_func;
 		protected IntPtr data;
-		protected bool is_le = BitConverter.IsLittleEndian;
+		static protected bool is_le = BitConverter.IsLittleEndian;
 		       
 		static void DestroyPixelData (IntPtr data)
 		{
@@ -60,20 +60,19 @@ namespace Mistelix.Widgets
 			SetDestroyFunc ();
 		}
 
-		// Converts from Cairo 32-bits to GTK 24 bits (3 channels)
 		public byte[] Get24bitsPixBuf ()
 		{
+			return FromCairo32ToPixBuf (Data, Width, Height, 3);
+		}
+
+		// Converts a pixel data array from Cairo 32-bits to GDK 24/32 bits
+		static public byte[] FromCairo32ToPixBuf (byte[] cairo_pixels, int width, int height, int channels)
+		{
 			int pos_cairo = 0;
 			int pos_gdk = 0;
-			byte [] cairo_pixels;
 			byte [] pixels;
-			int width, height;
-			const int channels = 3;
 
-			width = Width;
-			height = Height;
-			pixels = new byte [height * Width * channels];
-			cairo_pixels = Data;
+			pixels = new byte [height * width * channels];
 
 			for (int h = 0; h < height; h++) 
 			{
@@ -83,10 +82,18 @@ namespace Mistelix.Widgets
 						pixels[pos_gdk + 2] = cairo_pixels[pos_cairo + 0];
 					   	pixels[pos_gdk + 1] = cairo_pixels[pos_cairo + 1];
 					   	pixels[pos_gdk + 0] = cairo_pixels[pos_cairo + 2];
+
+						if (channels == 4)
+							pixels[pos_gdk + 3] = cairo_pixels[pos_cairo + 3];
+						
+						
 					} else {
 					   	pixels[pos_gdk + 0] = cairo_pixels[pos_cairo + 1];
 					   	pixels[pos_gdk + 1] = cairo_pixels[pos_cairo + 2];
 					   	pixels[pos_gdk + 2] = cairo_pixels[pos_cairo + 3];
+
+						if (channels == 4)
+							pixels[pos_gdk + 3] = cairo_pixels[pos_cairo + 0];
 					}
 
 					pos_gdk += channels;
@@ -96,7 +103,6 @@ namespace Mistelix.Widgets
 			return pixels;
 		}
 
-
 		[DllImport ("libcairo.so.2")]
 		static extern Cairo.Status cairo_surface_set_user_data (IntPtr surface, ref int key, IntPtr userdata, cairo_destroy_func_t destroy);
 
diff --git a/src/widgets/FileView.cs b/src/widgets/FileView.cs
index aa67345..4447e02 100644
--- a/src/widgets/FileView.cs
+++ b/src/widgets/FileView.cs
@@ -1,5 +1,5 @@
 //
-// Copyright (C) 2008 Jordi Mas i Hernandez, jmas softcatala org
+// Copyright (C) 2008-2009 Jordi Mas i Hernandez, jmas softcatala org
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the
@@ -60,7 +60,6 @@ namespace Mistelix.Widgets
 		protected FileView ()
 		{
 			store = CreateStore ();
-			LoadElements ();
 			SelectionMode = SelectionMode.Multiple;
 
 			TextColumn = COL_DISPLAY_NAME;
@@ -69,7 +68,8 @@ namespace Mistelix.Widgets
 			thumbnail_height = ThumbnailSizeManager.Current.Height;
 			thumbnail_width = ThumbnailSizeManager.Current.Width;
 
-			def_image = Gtk.IconTheme.Default.LoadIcon ("gtk-new", thumbnail_width, (Gtk.IconLookupFlags) 0);
+			CreateDefaultImage ();
+			LoadElements ();
 			Model = store;
 		}
 
@@ -88,7 +88,7 @@ namespace Mistelix.Widgets
 				for (int i = 0; i < items.Length; i++)
 				{			
 					store.GetIter (out iter, items [i]); 
-					files.Add ((string) store.GetValue (iter, 0));
+					files.Add ((string) store.GetValue (iter, COL_PATH));
 				}
 				return files;
 			}
@@ -112,7 +112,7 @@ namespace Mistelix.Widgets
 			Logger.Debug ("Fileview.Disposing");
 			store.Foreach (delegate (TreeModel model, TreePath path, TreeIter iter)  
 			{
-				Gdk.Pixbuf im = (Gdk.Pixbuf) store.GetValue (iter, 2);
+				Gdk.Pixbuf im = (Gdk.Pixbuf) store.GetValue (iter, COL_PIXBUF);
 				im.Dispose ();
 
 				return false;
@@ -151,5 +151,17 @@ namespace Mistelix.Widgets
 
 			thumbnailing.RunWorkerAsync (store);
 		}
+
+		void CreateDefaultImage ()
+		{
+			const int channels = 4;
+			Cairo.ImageSurface image;
+
+			image = GtkUtils.CreateNoPreviewImage (thumbnail_width, thumbnail_height);
+			byte[] data = DataImageSurface.FromCairo32ToPixBuf (image.Data, thumbnail_width, thumbnail_height, channels);
+			def_image = new Pixbuf (data, true, 8, thumbnail_width, thumbnail_height, thumbnail_width * channels, null);
+			image.Destroy ();
+		}
+
 	}
 }
diff --git a/src/widgets/GtkUtils.cs b/src/widgets/GtkUtils.cs
index 1593ae2..c4397de 100644
--- a/src/widgets/GtkUtils.cs
+++ b/src/widgets/GtkUtils.cs
@@ -23,10 +23,13 @@
 
 using System;
 using Gtk;
+using Cairo;
+using Mono.Posix;
 
 namespace Mistelix.Widgets
 {
 	// General GTK toolbox class
+	// TODO: Rename it to WidgetsUtils
 	public static class GtkUtils
 	{			
 		static public void DrawSelectionBox (Cairo.Context cr, double x, double y, double width, double height)
@@ -66,5 +69,31 @@ namespace Mistelix.Widgets
 
 			return new Gdk.Color ((byte)r, (byte)g, (byte)b);
 		}
+		
+		// Create the image indicating that there is no preview available yet
+		public static Cairo.ImageSurface CreateNoPreviewImage (int width, int height)
+		{
+			const int min_xpad = 10;
+			Cairo.Context cr;
+			int box_width, box_height;
+			Cairo.ImageSurface image;
+	
+			image = new Cairo.ImageSurface (Cairo.Format.Argb32, width, height);
+			cr = new Cairo.Context (image);
+
+			using (Pango.Layout layout = Pango.CairoHelper.CreateLayout (cr))
+			{
+				layout.FontDescription = Pango.FontDescription.FromString ("sans 8");
+				layout.SetMarkup (Catalog.GetString ("No preview available"));
+				layout.Alignment = Pango.Alignment.Center;
+				layout.SingleParagraphMode = false;
+				layout.Width = (int) ((width - min_xpad * 2) * Pango.Scale.PangoScale);
+				layout.GetPixelSize (out box_width, out box_height);
+				cr.MoveTo (min_xpad, (height - box_height) / 2);
+	     			Pango.CairoHelper.ShowLayout (cr, layout);
+			}
+			((IDisposable)cr).Dispose ();
+			return image;
+		}
 	}
 }
diff --git a/src/widgets/SlideShowImageView.cs b/src/widgets/SlideShowImageView.cs
index 63c4f47..893688b 100644
--- a/src/widgets/SlideShowImageView.cs
+++ b/src/widgets/SlideShowImageView.cs
@@ -111,7 +111,7 @@ namespace Mistelix.Widgets
 			ButtonPressEvent += new ButtonPressEventHandler (OnButtonPressed);
 			KeyPressEvent += OnKeyPressed;
 
-			CreateDefaultImage ();
+			def_image = GtkUtils.CreateNoPreviewImage (thumbnail_width, thumbnail_height);
 		}
 
 		~SlideShowImageView ()
@@ -622,30 +622,6 @@ namespace Mistelix.Widgets
 			}
 		}
 
-		// Create the image indicating that there is no preview available yet
-		void CreateDefaultImage ()
-		{
-			const int min_xpad = 10;
-			Cairo.Context cr;
-			int box_width, box_height;
-	
-			def_image = new Cairo.ImageSurface (Format.Argb32, thumbnail_width, thumbnail_height);
-			cr = new Cairo.Context (def_image);
-
-			using (Pango.Layout layout = Pango.CairoHelper.CreateLayout (cr))
-			{
-				layout.FontDescription = Pango.FontDescription.FromString ("sans 8");
-				layout.SetMarkup (Catalog.GetString ("No preview available"));
-				layout.Alignment = Pango.Alignment.Center;
-				layout.SingleParagraphMode = false;
-				layout.Width = (int) ((thumbnail_width - min_xpad * 2) * Pango.Scale.PangoScale);
-				layout.GetPixelSize (out box_width, out box_height);
-				cr.MoveTo (min_xpad, (thumbnail_height - box_height) / 2);
-	     			Pango.CairoHelper.ShowLayout (cr, layout);
-			}
-			((IDisposable)cr).Dispose ();
-		}
-
 		void OnEffect (object sender, Effect.EffectEventArgs e)
 		{
 			TreeIter iter;