DOC: Fix typo

[andy/viking.git] / src / ui_util.c

diff --git a/src/ui_util.c b/src/ui_util.c
index 13e9764dfc682f48e4fa19b556d70bbd8b5fe494..bc061ea5dc81beee4e5c3e35c217b7d9e5c35061 100644 (file)
--- a/src/ui_util.c
+++ b/src/ui_util.c
@@ -168,3 +168,95 @@ GtkWidget *ui_lookup_widget(GtkWidget *widget, const gchar *widget_name)
                g_warning("Widget not found: %s", widget_name);
        return found_widget;
 }
+
+/**
+ * Returns a label widget that is made selectable (i.e. the user can copy the text)
+ * @param text String to display - maybe NULL
+ * @return The label widget
+ */
+GtkWidget* ui_label_new_selectable ( const gchar* text )
+{
+       GtkWidget *widget = gtk_label_new ( text );
+       gtk_label_set_selectable ( GTK_LABEL(widget), TRUE );
+       return widget;
+}
+
+/**
+ * Apply the alpha value to the specified pixbuf
+ */
+GdkPixbuf *ui_pixbuf_set_alpha ( GdkPixbuf *pixbuf, guint8 alpha )
+{
+  guchar *pixels;
+  gint width, height, iii, jjj;
+
+  if ( ! gdk_pixbuf_get_has_alpha ( pixbuf ) )
+  {
+    GdkPixbuf *tmp = gdk_pixbuf_add_alpha(pixbuf,FALSE,0,0,0);
+    g_object_unref(G_OBJECT(pixbuf));
+    pixbuf = tmp;
+    if ( !pixbuf )
+      return NULL;
+  }
+
+  pixels = gdk_pixbuf_get_pixels(pixbuf);
+  width = gdk_pixbuf_get_width(pixbuf);
+  height = gdk_pixbuf_get_height(pixbuf);
+
+  /* r,g,b,a,r,g,b,a.... */
+  for (iii = 0; iii < width; iii++) for (jjj = 0; jjj < height; jjj++)
+  {
+    pixels += 3;
+    *pixels++ = alpha;
+  }
+  return pixbuf;
+}
+
+
+/**
+ * Reduce the alpha value of the specified pixbuf by alpha / 255
+ */
+GdkPixbuf *ui_pixbuf_scale_alpha ( GdkPixbuf *pixbuf, guint8 alpha )
+{
+  guchar *pixels;
+  gint width, height, iii, jjj;
+
+  if ( ! gdk_pixbuf_get_has_alpha ( pixbuf ) )
+  {
+    GdkPixbuf *tmp = gdk_pixbuf_add_alpha(pixbuf,FALSE,0,0,0);
+    g_object_unref(G_OBJECT(pixbuf));
+    pixbuf = tmp;
+    if ( !pixbuf )
+      return NULL;
+  }
+
+  pixels = gdk_pixbuf_get_pixels(pixbuf);
+  width = gdk_pixbuf_get_width(pixbuf);
+  height = gdk_pixbuf_get_height(pixbuf);
+
+  /* r,g,b,a,r,g,b,a.... */
+  for (iii = 0; iii < width; iii++) for (jjj = 0; jjj < height; jjj++)
+  {
+    pixels += 3;
+    *pixels = (guint8)(((guint16)*pixels * (guint16)alpha) / 255);
+    pixels++;
+  }
+  return pixbuf;
+}
+
+
+
+/**
+ *
+ */
+void ui_add_recent_file ( const gchar *filename )
+{
+       if ( filename ) {
+               GtkRecentManager *manager = gtk_recent_manager_get_default();
+               GFile *file = g_file_new_for_commandline_arg ( filename );
+               gchar *uri = g_file_get_uri ( file );
+               if ( uri && manager )
+                       gtk_recent_manager_add_item ( manager, uri );
+               g_object_unref( file );
+               g_free (uri);
+       }
+}