Method onMouse

gui/manager.go:115–143

onMouse is called when mouse events are received. OnMouseDown/OnMouseUp are dispatched to gm.target or to non-GUI, while OnMouseDownOut/OnMouseUpOut are dispatched to all non-target panels.

(evname string, ev interface{})

// OnMouseDown/OnMouseUp are dispatched to gm.target or to non-GUI, while
// OnMouseDownOut/OnMouseUpOut are dispatched to all non-target panels.
func (gm *manager) onMouse(evname string, ev interface{}) {

	// Check if gm.scene is nil and if so then there are no IPanels to send events to
	if gm.scene == nil {
		gm.Dispatch(evname, ev) // Dispatch event to non-GUI since event was not filtered by any GUI component
		return
	}

	// Dispatch OnMouseDownOut/OnMouseUpOut to all panels except ancestors of target
	gm.forEachIPanel(func(ipan IPanel) {
		if gm.target == nil || !ipan.IsAncestorOf(gm.target) {
			switch evname {
			case OnMouseDown:
				ipan.Dispatch(OnMouseDownOut, ev)
			case OnMouseUp:
				ipan.Dispatch(OnMouseUpOut, ev)
			}
		}
	})

	// Appropriately dispatch the event to target panel's lowest subscribed ancestor or to non-GUI or not at all
	if gm.target != nil {
		if gm.modal == nil || gm.modal.IsAncestorOf(gm.target) {
			sendAncestry(gm.target, false, nil, gm.modal, evname, ev)
		}
	} else if gm.modal == nil {
		gm.Dispatch(evname, ev)
	}
}

// onScroll is called when scroll events are received.
// The events are dispatched to the target panel or to non-GUI.