[gtk+] GtkCellRendererText: Add [foreground|background]-rgba properties

[Carlos Garnacho <carlosg src gnome org>]

commit d1140d0b1e3969ee567c8fac51779eed71a18185
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Oct 22 18:33:07 2010 +0200

    GtkCellRendererText: Add [foreground|background]-rgba properties
    
    These properties use GdkRGBA to render the cell renderer's content.
    Note that Pango attributes are used to render the foreground color,
    so the alpha value is currently ignored.

 gtk/gtkcellrenderertext.c |  136 ++++++++++++++++++++++++++++++++------------
 1 files changed, 99 insertions(+), 37 deletions(-)
---
diff --git a/gtk/gtkcellrenderertext.c b/gtk/gtkcellrenderertext.c
index 4a3110c..0313d16 100644
--- a/gtk/gtkcellrenderertext.c
+++ b/gtk/gtkcellrenderertext.c
@@ -93,6 +93,8 @@ enum {
   PROP_FOREGROUND,
   PROP_BACKGROUND_GDK,
   PROP_FOREGROUND_GDK,
+  PROP_BACKGROUND_RGBA,
+  PROP_FOREGROUND_RGBA,
   PROP_FONT,
   PROP_FONT_DESC,
   PROP_FAMILY,
@@ -140,8 +142,8 @@ struct _GtkCellRendererTextPrivate
 
   PangoAlignment        align;
   PangoAttrList        *extra_attrs;
-  PangoColor            foreground;
-  PangoColor            background;
+  GdkRGBA               foreground;
+  GdkRGBA               background;
   PangoEllipsizeMode    ellipsize;
   PangoFontDescription *font;
   PangoLanguage        *language;
@@ -274,6 +276,20 @@ gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class)
                                                        GDK_TYPE_COLOR,
                                                        GTK_PARAM_READWRITE));  
 
+  /**
+   * GtkCellRendererText:background-rgba:
+   *
+   * Background color as a #GdkRGBA
+   *
+   * Since: 3.0
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_BACKGROUND_RGBA,
+                                   g_param_spec_boxed ("background-rgba",
+                                                       P_("Background color as RGBA"),
+                                                       P_("Background color as a GdkRGBA"),
+                                                       GDK_TYPE_RGBA,
+                                                       GTK_PARAM_READWRITE));
   g_object_class_install_property (object_class,
                                    PROP_FOREGROUND,
                                    g_param_spec_string ("foreground",
@@ -290,6 +306,21 @@ gtk_cell_renderer_text_class_init (GtkCellRendererTextClass *class)
                                                        GDK_TYPE_COLOR,
                                                        GTK_PARAM_READWRITE));
 
+  /**
+   * GtkCellRendererText:foreground-rgba:
+   *
+   * Foreground color as a #GdkRGBA
+   *
+   * Since: 3.0
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_FOREGROUND_RGBA,
+                                   g_param_spec_boxed ("foreground-rgba",
+                                                       P_("Foreground color as RGBA"),
+                                                       P_("Foreground color as a GdkRGBA"),
+                                                       GDK_TYPE_RGBA,
+                                                       GTK_PARAM_READWRITE));
+
 
   g_object_class_install_property (object_class,
                                    PROP_EDITABLE,
@@ -717,11 +748,11 @@ gtk_cell_renderer_text_get_property (GObject        *object,
     case PROP_BACKGROUND_GDK:
       {
         GdkColor color;
-        
-        color.red = priv->background.red;
-        color.green = priv->background.green;
-        color.blue = priv->background.blue;
-        
+
+        color.red = (guint16) (priv->background.red * 65535);
+        color.green = (guint16) (priv->background.green * 65535);
+        color.blue = (guint16) (priv->background.blue * 65535);
+
         g_value_set_boxed (value, &color);
       }
       break;
@@ -729,15 +760,23 @@ gtk_cell_renderer_text_get_property (GObject        *object,
     case PROP_FOREGROUND_GDK:
       {
         GdkColor color;
-        
-        color.red = priv->foreground.red;
-        color.green = priv->foreground.green;
-        color.blue = priv->foreground.blue;
-        
+
+        color.red = (guint16) (priv->foreground.red * 65535);
+        color.green = (guint16) (priv->foreground.green * 65535);
+        color.blue = (guint16) (priv->foreground.blue * 65535);
+
         g_value_set_boxed (value, &color);
       }
       break;
 
+    case PROP_BACKGROUND_RGBA:
+      g_value_set_boxed (value, &priv->background);
+      break;
+
+    case PROP_FOREGROUND_RGBA:
+      g_value_set_boxed (value, &priv->foreground);
+      break;
+
     case PROP_FONT:
         g_value_take_string (value, pango_font_description_to_string (priv->font));
       break;
@@ -887,21 +926,19 @@ gtk_cell_renderer_text_get_property (GObject        *object,
 
 static void
 set_bg_color (GtkCellRendererText *celltext,
-              GdkColor            *color)
+              GdkRGBA             *rgba)
 {
   GtkCellRendererTextPrivate *priv = celltext->priv;
 
-  if (color)
+  if (rgba)
     {
       if (!priv->background_set)
         {
           priv->background_set = TRUE;
           g_object_notify (G_OBJECT (celltext), "background-set");
         }
-      
-      priv->background.red = color->red;
-      priv->background.green = color->green;
-      priv->background.blue = color->blue;
+
+      priv->background = *rgba;
     }
   else
     {
@@ -916,21 +953,19 @@ set_bg_color (GtkCellRendererText *celltext,
 
 static void
 set_fg_color (GtkCellRendererText *celltext,
-              GdkColor            *color)
+              GdkRGBA             *rgba)
 {
   GtkCellRendererTextPrivate *priv = celltext->priv;
 
-  if (color)
+  if (rgba)
     {
       if (!priv->foreground_set)
         {
           priv->foreground_set = TRUE;
           g_object_notify (G_OBJECT (celltext), "foreground-set");
         }
-      
-      priv->foreground.red = color->red;
-      priv->foreground.green = color->green;
-      priv->foreground.blue = color->blue;
+
+      priv->foreground = *rgba;
     }
   else
     {
@@ -1140,12 +1175,12 @@ gtk_cell_renderer_text_set_property (GObject      *object,
       
     case PROP_BACKGROUND:
       {
-        GdkColor color;
+        GdkRGBA rgba;
 
         if (!g_value_get_string (value))
           set_bg_color (celltext, NULL);       /* reset to background_set to FALSE */
-        else if (gdk_color_parse (g_value_get_string (value), &color))
-          set_bg_color (celltext, &color);
+        else if (gdk_rgba_parse (g_value_get_string (value), &rgba))
+          set_bg_color (celltext, &rgba);
         else
           g_warning ("Don't know color `%s'", g_value_get_string (value));
 
@@ -1155,12 +1190,12 @@ gtk_cell_renderer_text_set_property (GObject      *object,
       
     case PROP_FOREGROUND:
       {
-        GdkColor color;
+        GdkRGBA rgba;
 
         if (!g_value_get_string (value))
           set_fg_color (celltext, NULL);       /* reset to foreground_set to FALSE */
-        else if (gdk_color_parse (g_value_get_string (value), &color))
-          set_fg_color (celltext, &color);
+        else if (gdk_rgba_parse (g_value_get_string (value), &rgba))
+          set_fg_color (celltext, &rgba);
         else
           g_warning ("Don't know color `%s'", g_value_get_string (value));
 
@@ -1169,11 +1204,39 @@ gtk_cell_renderer_text_set_property (GObject      *object,
       break;
 
     case PROP_BACKGROUND_GDK:
+      {
+        GdkColor *color;
+        GdkRGBA rgba;
+
+        color = g_value_get_boxed (value);
+        rgba.red = color->red / 65535.;
+        rgba.green = color->green / 65535.;
+        rgba.blue = color->blue / 65535.;
+
+        set_bg_color (celltext, &rgba);
+      }
+      break;
+
+    case PROP_FOREGROUND_GDK:
+      {
+        GdkColor *color;
+        GdkRGBA rgba;
+
+        color = g_value_get_boxed (value);
+        rgba.red = color->red / 65535.;
+        rgba.green = color->green / 65535.;
+        rgba.blue = color->blue / 65535.;
+
+        set_fg_color (celltext, &rgba);
+      }
+      break;
+
+    case PROP_BACKGROUND_RGBA:
       /* This notifies the GObject itself. */
       set_bg_color (celltext, g_value_get_boxed (value));
       break;
 
-    case PROP_FOREGROUND_GDK:
+    case PROP_FOREGROUND_RGBA:
       /* This notifies the GObject itself. */
       set_fg_color (celltext, g_value_get_boxed (value));
       break;
@@ -1465,8 +1528,10 @@ get_layout (GtkCellRendererText *celltext,
         {
           PangoColor color;
 
-          color = priv->foreground;
-          
+          color.red = (guint16) (priv->foreground.red * 65535);
+          color.green = (guint16) (priv->foreground.green * 65535);
+          color.blue = (guint16) (priv->foreground.blue * 65535);
+
           add_attr (attr_list,
                     pango_attr_foreground_new (color.red, color.green, color.blue));
         }
@@ -1738,10 +1803,7 @@ gtk_cell_renderer_text_render (GtkCellRenderer      *cell,
       (flags & GTK_CELL_RENDERER_SELECTED) == 0)
     {
       gdk_cairo_rectangle (cr, background_area);
-      cairo_set_source_rgb (cr,
-			    priv->background.red / 65535.,
-			    priv->background.green / 65535.,
-			    priv->background.blue / 65535.);
+      gdk_cairo_set_source_rgba (cr, &priv->background);
       cairo_fill (cr);
     }