rendering engine : _on_change_layout() called when pos/size changed

[chaz/tint2] / src / util / area.h

diff --git a/src/util/area.h b/src/util/area.h
index b016674ed4f3c97f602addd00252e5a42e42b506..37e1dc42132f00db8df59e97f54f5d79ae4003df 100644 (file)
--- a/src/util/area.h
+++ b/src/util/area.h
@@ -63,7 +63,8 @@ typedef struct {
        // list of child : Area object
        GSList *list;
 
-       // object visible on screen
+       // object visible on screen. 
+       // An object (like systray) could be enabled but hidden (because no tray icon).
        int on_screen;
        // way to calculate the size (SIZE_BY_CONTENT or SIZE_BY_LAYOUT)
        int size_mode;
@@ -81,23 +82,34 @@ typedef struct {
 
        // each object can overwrite following function
        void (*_draw_foreground)(void *obj, cairo_t *c);
-       // calculate size. return '1' if size changed, '0' otherwise.
+       // update area's content and update size (width/heith). 
+       // return '1' if size changed, '0' otherwise.
        int (*_resize)(void *obj);
-       void (*_add_child)(void *obj);
-       int (*_remove_child)(void *obj);
+       // after pos/size changed, the rendering engine will call _on_change_layout(Area*)
+       int on_changed;
+       void (*_on_change_layout)(void *obj);
        const char* (*_get_tooltip_text)(void *obj);
 } Area;
 
+// on startup, initialize fixed pos/size
+void init_rendering(void *obj, int pos);
 
-void rendering(void *panel);
+void rendering(void *obj);
 void size_by_content (Area *a);
 void size_by_layout (Area *a, int pos, int level);
 // draw background and foreground
 void refresh (Area *a);
  
+// generic resize for SIZE_BY_LAYOUT objects
+int resize_by_layout(void *obj);
+
 // set 'redraw' on an area and childs
 void set_redraw (Area *a);
 
+// hide/unhide area
+void hide(Area *a);
+void show(Area *a);
+
 // draw pixmap
 void draw (Area *a);
 void draw_background (Area *a, cairo_t *c);