#include <UT/UT_DSOVersion.h>
#include <DM/DM_EventTable.h>
#include <DM/DM_MouseHook.h>
#include <DM/DM_VPortAgent.h>
#include <UI/UI_Event.h>

#include <QtCore/qcoreapplication.h>
#include <QtWidgets/qmainwindow.h>


class DM_GreedyMouseEventHook : public DM_MouseEventHook {

public:
	DM_GreedyMouseEventHook(DM_VPortAgent &vport) : DM_MouseEventHook(vport, DM_VIEWPORT_ALL_3D) { }
	~DM_GreedyMouseEventHook() override { }

	bool handleMouseEvent(const DM_MouseHookData &hook_data, UI_Event *event) override {

		if ((event->state.values[W] & UI_RIGHT_BUTTON) && (event->state.altFlags & UI_SHIFT_KEY)) {
			if (event->reason == UI_VALUE_START) {
                                // This will not work, the widget is not coupled with Houdini's main thread
				widget = std::make_unique<QWidget>();
				widget.get()->resize(640, 480);
				widget.get()->setWindowTitle("Hello, world!!!");
				widget.get()->show();
				
			}
		}

		return true;
	}

	bool handleMouseWheelEvent(const DM_MouseHookData &hook_data, UI_Event *event) override {
		return false;
	}

	bool handleDoubleClickEvent(const DM_MouseHookData &hook_data, UI_Event *event) override {
		return false;
	}

	bool allowRMBMenu(const DM_MouseHookData &hook_data, UI_Event *event) override {
		return false;
	}

private:
	std::unique_ptr<QWidget> widget; // I'm using unique_prt so I don't need to deal with memory management,
                                         // but I'm open to other suggestions.
};

// DM_GreedyMouseHook is a factory for DM_GreedyMouseEventHook objects.
class DM_GreedyMouseHook : public DM_MouseHook {
	
public:
		
	DM_GreedyMouseHook() : DM_MouseHook("Greedy", 0) { }
	DM_MouseEventHook *newEventHook(DM_VPortAgent &vport) override {
		return new DM_GreedyMouseEventHook(vport);
	}

	void retireEventHook(DM_VPortAgent &vport, DM_MouseEventHook *hook) override {
		// Shared hooks might deference a ref count, but this example just
		// creates one hook per viewport.
		delete hook;
	}
};

void DMnewEventHook(DM_EventTable *table) {
	table->registerMouseHook(new DM_GreedyMouseHook);
}

#include <UT/UT_DSOVersion.h>
#include <DM/DM_EventTable.h>
#include <DM/DM_MouseHook.h>
#include <DM/DM_VPortAgent.h>
#include <UI/UI_Event.h>

#include <qwidget.h>


class DM_GreedyMouseEventHook : public DM_MouseEventHook {

public:
	DM_GreedyMouseEventHook(DM_VPortAgent &vport) : DM_MouseEventHook(vport, DM_VIEWPORT_ALL_3D) { }
	~DM_GreedyMouseEventHook() override { }

	bool handleMouseEvent(const DM_MouseHookData &hook_data, UI_Event *event) override {

		if (event->reason == UI_VALUE_CHANGED) {
			// Mouse up. We destroy the widget.
				
			widget->deleteLater();
			return true;
		}
		else if (event->state.values[W] & UI_RIGHT_BUTTON && event->reason == UI_VALUE_START) {
			// Mouse down. We create a standalone widget.

			myWidget = new QWidget(nullptr);
			myWidget->setGeometry(300, 300, 100, 100);
			myWidget->show();

			return true;
		}

		return true;

	}

	bool handleMouseWheelEvent(const DM_MouseHookData &hook_data, UI_Event *event) override {
		return false;
	}

	bool handleDoubleClickEvent(const DM_MouseHookData &hook_data, UI_Event *event) override {
		return false;
	}

	bool allowRMBMenu(const DM_MouseHookData &hook_data, UI_Event *event) override {
		return false;
	}

private:
	QWidget* widget;

};

// DM_GreedyMouseHook is a factory for DM_GreedyMouseEventHook objects.
class DM_GreedyMouseHook : public DM_MouseHook {
	
public:
		
	DM_GreedyMouseHook() : DM_MouseHook("Greedy", 0) { }
	DM_MouseEventHook *newEventHook(DM_VPortAgent &vport) override {
		return new DM_GreedyMouseEventHook(vport);
	}

	void retireEventHook(DM_VPortAgent &vport, DM_MouseEventHook *hook) override {
		// Shared hooks might deference a ref count, but this example just
		// creates one hook per viewport.
		delete hook;
	}
};

void DMnewEventHook(DM_EventTable *table) {
	table->registerMouseHook(new DM_GreedyMouseHook);
}