SF Bugs#133: Remove the auto added map when opening the first .vik file from the...

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

diff --git a/src/ui_util.c b/src/ui_util.c
index 6d8b17c1e6afeb0aee73cc50068e0fc2f192c003..2d41cee985655d138af64b147348bf2787700956 100644 (file)
--- a/src/ui_util.c
+++ b/src/ui_util.c
@@ -206,7 +206,119 @@ GdkPixbuf *ui_pixbuf_set_alpha ( GdkPixbuf *pixbuf, guint8 alpha )
   for (iii = 0; iii < width; iii++) for (jjj = 0; jjj < height; jjj++)
   {
     pixels += 3;
-    *pixels++ = alpha;
+    if ( *pixels != 0 )
+      *pixels = alpha;
+    pixels++;
   }
   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;
+    if ( *pixels != 0 )
+      *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);
+       }
+}
+
+/**
+ * Clear the entry text if the specified icon is pressed
+ */
+static void ui_icon_clear_entry ( GtkEntry             *entry,
+                                  GtkEntryIconPosition position,
+                                  GdkEventButton       *event,
+                                  gpointer             data )
+{
+       if ( position == GPOINTER_TO_INT(data) )
+               gtk_entry_set_text ( entry, "" );
+}
+
+static void
+text_changed_cb (GtkEntry   *entry,
+                 GParamSpec *pspec,
+                 gpointer   data)
+{
+       if ( data ) {
+               gboolean has_text = gtk_entry_get_text_length(entry) > 0;
+               gtk_entry_set_icon_sensitive ( entry, GPOINTER_TO_INT(data), has_text );
+       }
+}
+
+/**
+ * Create an entry field with an icon to clear the entry
+ *
+ * Ideal for entries used for getting user entered transitory data,
+ *  so it is easy to delete the text and start again.
+ */
+GtkWidget *ui_entry_new ( const gchar *str, GtkEntryIconPosition position )
+{
+       GtkWidget *entry = gtk_entry_new();
+       if ( str )
+               gtk_entry_set_text ( GTK_ENTRY(entry), str );
+       gtk_entry_set_icon_from_stock ( GTK_ENTRY(entry), position, GTK_STOCK_CLEAR );
+#if GTK_CHECK_VERSION (2,20,0)
+       text_changed_cb ( GTK_ENTRY(entry), NULL, GINT_TO_POINTER(position) );
+       g_signal_connect ( entry, "notify::text", G_CALLBACK(text_changed_cb), GINT_TO_POINTER(position) );
+#endif
+       g_signal_connect ( entry, "icon-release", G_CALLBACK(ui_icon_clear_entry), GINT_TO_POINTER(position) );
+       return entry;
+}
+
+/**
+ * Create a spinbutton with an icon to clear the entry
+ *
+ * Ideal for entries used for getting user entered transitory data,
+ *  so it is easy to delete the number and start again.
+ */
+GtkWidget *ui_spin_button_new ( GtkAdjustment *adjustment,
+                                gdouble climb_rate,
+                                guint digits )
+{
+       GtkWidget *spin = gtk_spin_button_new ( adjustment, climb_rate, digits );
+       gtk_entry_set_icon_from_stock ( GTK_ENTRY(spin), GTK_ENTRY_ICON_PRIMARY, GTK_STOCK_CLEAR );
+       g_signal_connect ( spin, "icon-release", G_CALLBACK(ui_icon_clear_entry), GINT_TO_POINTER(GTK_ENTRY_ICON_PRIMARY) );
+       return spin;
+}