widgets: Adapt brush previews to theme

We now check the current theme and 
draw the brush preview color and
background to match.

app/core/gimpbrush.c

@@ -26,6 +26,9 @@
 
 #include "core-types.h"
 
+#include "config/gimpguiconfig.h"
+
+#include "gimp.h"
 #include "gimpbezierdesc.h"
 #include "gimpbrush.h"
 #include "gimpbrush-boundary.h"
@@ -37,6 +40,7 @@
 #include "gimpbrushcache.h"
 #include "gimpbrushgenerated.h"
 #include "gimpbrushpipe.h"
+#include "gimpcontext.h"
 #include "gimptagged.h"
 #include "gimptempbuf.h"
 
@@ -366,13 +370,21 @@ gimp_brush_get_new_preview (GimpViewable *viewable,
     }
   else
     {
+      GimpGuiConfig *config;
+      guint8         rgb[3] = {0, 0, 0};
+
+      config = GIMP_GUI_CONFIG (context->gimp->config);
+
+      if (config->theme_scheme == GIMP_THEME_DARK)
+        rgb[0] = rgb[1] = rgb[2] = 255;
+
       for (y = 0; y < mask_height; y++)
         {
           for (x = 0; x < mask_width ; x++)
             {
-              *buf++ = 0;
+              *buf++ = rgb[0];
-              *buf++ = 0;
+              *buf++ = rgb[1];
-              *buf++ = 0;
+              *buf++ = rgb[2];
               *buf++ = *mask++;
             }
         }

app/widgets/gimpbrusheditor.c

@@ -81,11 +81,14 @@ gimp_brush_editor_class_init (GimpBrushEditorClass *klass)
 {
   GObjectClass        *object_class = G_OBJECT_CLASS (klass);
   GimpDataEditorClass *editor_class = GIMP_DATA_EDITOR_CLASS (klass);
+  GtkWidgetClass      *widget_class = GTK_WIDGET_CLASS (klass);
 
   object_class->constructed = gimp_brush_editor_constructed;
 
   editor_class->set_data    = gimp_brush_editor_set_data;
   editor_class->title       = _("Brush Editor");
+
+  gtk_widget_class_set_css_name (widget_class, "GimpBrushEditor");
 }
 
 static void

app/widgets/gimpview.c

@@ -164,6 +164,8 @@ gimp_view_class_init (GimpViewClass *klass)
   klass->clicked                     = NULL;
   klass->double_clicked              = NULL;
   klass->context                     = NULL;
+
+  gtk_widget_class_set_css_name (widget_class, "GimpView");
 }
 
 static void

app/widgets/gimpviewrenderer.c

@@ -1176,6 +1176,29 @@ gimp_view_render_temp_buf_to_surface (GimpViewRenderer *renderer,
     case GIMP_VIEW_BG_WHITE:
       cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
       break;
+
+    case GIMP_VIEW_BG_USE_STYLE:
+      {
+        GtkStyleContext *style;
+        GdkRGBA         *color = NULL;
+
+        style = gtk_widget_get_style_context (widget);
+        gtk_style_context_get (style, gtk_style_context_get_state (style),
+                               GTK_STYLE_PROPERTY_BACKGROUND_COLOR, &color,
+                               NULL);
+
+        if (color)
+          {
+            cairo_set_source_rgb (cr, color->red, color->green, color->blue);
+
+            gdk_rgba_free (color);
+          }
+        else
+          {
+            cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+          }
+      }
+      break;
     }
 
   cairo_paint (cr);
@@ -1205,6 +1228,10 @@ gimp_view_render_temp_buf_to_surface (GimpViewRenderer *renderer,
         case GIMP_VIEW_BG_WHITE:
           cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
           break;
+
+        case GIMP_VIEW_BG_USE_STYLE:
+        default:
+          break;
         }
 
       cairo_fill (cr);

app/widgets/gimpviewrendererbrush.c

@@ -119,8 +119,8 @@ gimp_view_renderer_brush_render (GimpViewRenderer *renderer,
       gimp_view_renderer_render_temp_buf (renderer, widget, temp_buf,
                                           temp_buf_x, temp_buf_y,
                                           -1,
-                                          GIMP_VIEW_BG_WHITE,
+                                          GIMP_VIEW_BG_USE_STYLE,
-                                          GIMP_VIEW_BG_WHITE);
+                                          GIMP_VIEW_BG_USE_STYLE);
 
       gimp_temp_buf_unref (temp_buf);
 
@@ -139,8 +139,8 @@ gimp_view_renderer_brush_render (GimpViewRenderer *renderer,
   gimp_view_renderer_render_temp_buf (renderer, widget, temp_buf,
                                       temp_buf_x, temp_buf_y,
                                       -1,
-                                      GIMP_VIEW_BG_WHITE,
+                                      GIMP_VIEW_BG_USE_STYLE,
-                                      GIMP_VIEW_BG_WHITE);
+                                      GIMP_VIEW_BG_USE_STYLE);
 
   gimp_temp_buf_unref (temp_buf);
 }
@@ -193,8 +193,8 @@ gimp_view_renderer_brush_render_timeout (gpointer data)
   gimp_view_renderer_render_temp_buf (renderer, renderbrush->widget, temp_buf,
                                       temp_buf_x, temp_buf_y,
                                       -1,
-                                      GIMP_VIEW_BG_WHITE,
+                                      GIMP_VIEW_BG_USE_STYLE,
-                                      GIMP_VIEW_BG_WHITE);
+                                      GIMP_VIEW_BG_USE_STYLE);
 
   gimp_temp_buf_unref (temp_buf);
 

app/widgets/widgets-enums.h

@@ -128,7 +128,8 @@ typedef enum
 typedef enum  /*< skip >*/
 {
   GIMP_VIEW_BG_CHECKS,
-  GIMP_VIEW_BG_WHITE
+  GIMP_VIEW_BG_WHITE,
+  GIMP_VIEW_BG_USE_STYLE
 } GimpViewBG;
 
 typedef enum  /*< skip >*/

themes/Default/common.css

@@ -67,6 +67,11 @@ GimpDock .view:drop(active) {
   border-top-color: @dimmed-fg-color;
 }
 
+/* Widget for various previews and icon tabs  */
+GimpView {
+  background-color: @extreme-bg-color;
+}
+
 /* Define the mouse-over color for the path
  * buttons in the various file dialogs.
  */