Method onDragDrop

src/app/PortWidget.cpp:535–594

void PortWidget::onDragDrop(const DragDropEvent& e) {
	if (e.button != GLFW_MOUSE_BUTTON_LEFT)
		return;

	PortWidget* pwOrigin = dynamic_cast<PortWidget*>(e.origin);
	if (!pwOrigin)
		return;

	// HACK: Only delete tooltip if we're not (normal) dragging it.
	if (pwOrigin == this) {
		createTooltip();
	}

	for (CableWidget* cw : APP->scene->rack->getIncompleteCables()) {
		// These should already be NULL because onDragLeave() is called immediately before onDragDrop().
		cw->hoveredOutputPort = NULL;
		cw->hoveredInputPort = NULL;
		if (type == engine::Port::OUTPUT) {
			// Check that similar cable doesn't exist
			if (cw->inputPort && !APP->scene->rack->getCable(this, cw->inputPort)) {
				cw->outputPort = this;
			}
			else {
				continue;
			}
		}
		else {
			if (cw->outputPort && !APP->scene->rack->getCable(cw->outputPort, this)) {
				cw->inputPort = this;
			}
			else {
				continue;
			}
		}
		cw->updateCable();

		// This should always be true since the ComplexAction is created in onDragStart()
		history::ComplexAction* history = pwOrigin->internal->history;
		if (history) {
			// Reject history if plugging into same port
			auto& actions = history->actions;
			auto it = std::find_if(actions.begin(), actions.end(), [&](history::Action* h) {
				history::CableAdd* hca = dynamic_cast<history::CableAdd*>(h);
				if (!hca)
					return false;
				return hca->isCable(cw);
			});

			if (it != actions.end()) {
				actions.erase(it);
			}
			else {
				// Push CableAdd action
				history::CableAdd* h = new history::CableAdd;
				h->setCable(cw);
				history->push(h);
			}
		}