SugarPreview API improvements

lib/sugar/_sugarext.defs

@@ -173,11 +173,24 @@
   )
 )
 
-(define-method save
+(define-method set_size
   (of-object "SugarPreview")
-  (c-name "sugar_preview_save")
+  (c-name "sugar_preview_set_size")
-  (return-type "gboolean")
+  (return-type "none")
   (parameters
-    '("const-char*" "key")
+    '("int" "width")
+    '("int" "height")
   )
 )
+
+(define-method clear
+  (of-object "SugarPreview")
+  (c-name "sugar_preview_clear")
+  (return-type "none")
+)
+
+(define-method get_pixbuf
+  (of-object "SugarPreview")
+  (c-name "sugar_preview_get_pixbuf")
+  (return-type "GdkPixbuf*")
+)

lib/sugar/sugar-preview.c

@@ -27,13 +27,20 @@ static void sugar_preview_init       (SugarPreview *menu);
 
 G_DEFINE_TYPE(SugarPreview, sugar_preview, G_TYPE_OBJECT)
 
-gboolean
+void
-sugar_preview_save(SugarPreview *preview, const char *file_name)
+sugar_preview_set_size(SugarPreview *preview, int width, int height)
+{
+    preview->width = width;
+    preview->height = height;
+}
+
+GdkPixbuf *
+sugar_preview_get_pixbuf(SugarPreview *preview)
 {
     GdkPixbuf *pixbuf;
 
-    if (preview->image != NULL) {
+    if (preview->image == NULL) {
-        return FALSE;
+        return NULL;
     }
 
     pixbuf = gdk_pixbuf_get_from_image(NULL, preview->image, NULL,
@@ -41,14 +48,16 @@ sugar_preview_save(SugarPreview *preview, const char *file_name)
                                        preview->image->width,
                                        preview->image->height);
 
-    gdk_pixbuf_save(pixbuf, file_name, "png", NULL);
+    return pixbuf;
+}
 
+void
+sugar_preview_clear(SugarPreview *preview)
+{
     if (preview->image != NULL) {
         g_object_unref(G_OBJECT(preview->image));
         preview->image = NULL;
     }
-
-    return TRUE;
 }
 
 void
@@ -59,16 +68,14 @@ sugar_preview_take_screenshot(SugarPreview *preview, GdkDrawable *drawable)
     GdkColormap *colormap;
     gint width, height;
 
+    sugar_preview_clear(preview);
+
     gdk_drawable_get_size(drawable, &width, &height);
 
     screen = gdk_drawable_get_screen(drawable);
     visual = gdk_drawable_get_visual(drawable);
     colormap = gdk_drawable_get_colormap(drawable);
 
-    if (preview->image != NULL) {
-        g_object_unref(G_OBJECT(preview->image));
-    }
-
     preview->image = gdk_image_new(GDK_IMAGE_SHARED, visual, width, height);
     gdk_image_set_colormap(preview->image, colormap);
 
@@ -79,17 +86,12 @@ sugar_preview_take_screenshot(SugarPreview *preview, GdkDrawable *drawable)
 }
 
 static void
-sugar_preview_dispose (GObject *object)
+sugar_preview_dispose(GObject *object)
 {
     SugarPreview *preview = SUGAR_PREVIEW(object);
-
+    sugar_preview_clear(preview);
-    if (preview->image != NULL) {
-        g_object_unref(G_OBJECT(preview->image));
-        preview->image = NULL;
-    }
 }
 
-
 static void
 sugar_preview_class_init(SugarPreviewClass *preview_class)
 {

lib/sugar/sugar-preview.h

@@ -38,6 +38,8 @@ struct _SugarPreview {
     GObject base_instance;
 
     GdkImage *image;
+    int width;
+    int height;
 };
 
 struct _SugarPreviewClass {
@@ -45,10 +47,13 @@ struct _SugarPreviewClass {
 };
 
 GType	   sugar_preview_get_type        (void);
-void     sugar_preview_take_screenshot  (SugarPreview *menu,
+void       sugar_preview_take_screenshot (SugarPreview *preview,
                                           GdkDrawable  *drawable);
-gboolean sugar_preview_save             (SugarPreview *menu,
+void       sugar_preview_set_size        (SugarPreview *preview,
-                                         const char *file_name);
+                                          int width,
+                                          int height);
+GdkPixbuf *sugar_preview_get_pixbuf      (SugarPreview *preview);
+void       sugar_preview_clear           (SugarPreview *preview);
 
 G_END_DECLS
 

tests/graphics/preview.py

@@ -28,7 +28,8 @@ import common
 def _preview_timeout_cb():
     preview = _sugarext.Preview()
     preview.take_screenshot(button.window)
-    preview.save('/home/marco/test.png')
+    preview.get_pixbuf().save('/home/marco/test.png','png')
+    preview.clear()
 
 test = common.Test()