added the widget and the composite widget classes

1 files changed, 67 insertions, 7 deletions

diff --git a/src/gui/widget.c b/src/gui/widget.c
index 313fd49..cd77d03 100644
--- a/src/gui/widget.c
+++ b/src/gui/widget.c
@@ -5,12 +5,14 @@
 
 static widget_vtable_t widget_vtable = {
 	widget_draw,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL
+	widget_get_focus,
+	widget_model_to_screen,
+	widget_contains_coordinate,
+	widget_on_mouse_down,
+	widget_on_mouse_up,
+	widget_on_mouse_move,
+	widget_on_key_down,
+	widget_on_key_up
 };
 
 void widget_init( widget_t *widget, widget_t *parent, const int x, const int y, const int w, const int h )
@@ -29,7 +31,65 @@ void widget_init( widget_t *widget, widget_t *parent, const int x, const int y,
 void widget_draw( void *obj, graphics_context_t *context )
 {
 	widget_t *widget = obj;
+	int x = 0;
+	int y = 0;
 
-	vga_draw_rectangle( context, widget->x, widget->y, widget->w, widget->h,
+	widget->vtable->model_to_screen( widget, &x, &y );
+
+	vga_draw_rectangle( context, x, y, widget->w, widget->h,
 		vga_make_RGB( 0xFF, 0xFF, 0xFF ) );
 }
+
+void widget_get_focus( void *obj, widget_t *widget )
+{
+	widget_t *o = obj;
+
+	if( o->parent != NULL ) {
+		o->parent->vtable->get_focus( widget->parent, widget );
+	}
+}
+
+void widget_model_to_screen( void *obj, int *x, int *y )
+{
+	widget_t *widget = obj;	
+
+	if( widget->parent != NULL ) {
+		widget->parent->vtable->model_to_screen( widget->parent, x, y );
+	}
+
+	*x += widget->x;
+	*y += widget->y;
+}
+
+bool widget_contains_coordinate( void *obj, const int x, const int y )
+{
+	widget_t *widget = obj;
+
+	return widget->x <= x && x < widget->x + widget->w &&
+		widget->y <= y && y < widget->y + widget->h;
+}
+
+void widget_on_mouse_down( void *obj, const int x, const int y )
+{
+	widget_t *widget = obj;	
+
+	if( widget->focusable ) {
+		widget->vtable->get_focus( widget, widget );
+	}
+}
+
+void widget_on_mouse_up( void *obj, const int x, const int y )
+{
+}
+
+void widget_on_mouse_move( void *obj, const int old_x, const int old_y, const int x, const int y )
+{
+}
+
+void widget_on_key_down( void *obj, char c )
+{
+}
+
+void widget_on_key_up( void *obj, char c )
+{
+}