/*
Function: wz_update
Updates the widget tree, call this every frame
Doesn't update the disabled widgets
Parameters:
dt - Time that has passed since the last update
*/
void wz_update(WZ_WIDGET* wgt, double dt)
{
ALLEGRO_EVENT event;
wz_craft_event(&event, WZ_UPDATE, 0, 0);
wz_broadcast_event(wgt, &event);
wz_craft_event(&event, WZ_UPDATE_POSITION, 0, 0);
wz_broadcast_event(wgt, &event);
}
/*
Function: wz_enable
Enables/disables the widget tree
Parameters:
enable - pass 1 to enable the widget tree, or 0 to disable it
*/
void wz_enable(WZ_WIDGET* wgt, int enable)
{
ALLEGRO_EVENT event;
wz_craft_event(&event, enable ? WZ_ENABLE : WZ_DISABLE, 0, 0);
wz_broadcast_event(wgt, &event);
}
/*
Function: wz_show
Shows/hides the widget tree
Parameters:
show - pass 1 to show the widget tree, or 0 to hide it
*/
void wz_show(WZ_WIDGET* wgt, int show)
{
ALLEGRO_EVENT event;
wz_craft_event(&event, show ? WZ_SHOW : WZ_HIDE, 0, 0);
wz_broadcast_event(wgt, &event);
}
/*
Function: wz_destroy
Destroys the widget tree. Call it to free all of the memory used by the widget tree.
*/
void wz_destroy(WZ_WIDGET* wgt)
{
ALLEGRO_EVENT event;
wz_detach(wgt);
wz_craft_event(&event, WZ_DESTROY, 0, 0);
wz_broadcast_event(wgt, &event);
}
/*
Function: wz_focus
Focuses/defocuses the widget tree. This function propagates the focus down the tree.
Parameters:
focus - pass 1 to focus the widget tree, or 0 to defocus it
*/
void wz_focus(WZ_WIDGET* wgt, int focus)
{
if (focus)
{
wz_ask_parent_for_focus(wgt);
}
else
{
ALLEGRO_EVENT event;
wz_craft_event(&event, WZ_LOSE_FOCUS, 0, 0);
wz_broadcast_event(wgt, &event);
}
}
/*
Function: wz_broadcast_event
Broadcasts an event to a widget, and to all of its children, propagating down the tree
Returns:
1 if the event was handled by some widget, 0 if it was not
*/
int wz_broadcast_event(WZ_WIDGET* wgt, ALLEGRO_EVENT* event)
{
int ret = 0;
WZ_WIDGET* child = wgt->first_child;
ret |= wgt->proc(wgt, event);
while (child)
{
WZ_WIDGET* next = child->next_sib;
ret |= wz_broadcast_event(child, event);
child = next;
}
return ret;
}
/*
Function: wz_draw
Draws the widget tree. Only affects the visible widgets
*/
void wz_draw(WZ_WIDGET* wgt)
{
ALLEGRO_EVENT event;
wz_craft_event(&event, WZ_DRAW, 0, 0);
wz_broadcast_event(wgt, &event);
}
/*
Function: wz_resize
Resizes the widget tree.
Parameters:
factor: scaling factor
*/
void wz_resize(WZ_WIDGET* wgt, float factor)
{
ALLEGRO_EVENT event;
wz_craft_event(&event, WZ_RESIZE, 0, *(intptr_t*)&factor);
wz_broadcast_event(wgt, &event);
}