// qt includes
#include <QtWidgets\QMainWindow>
#include <QtWidgets\QApplication>
#include <QtWidgets\QToolBar>
#include <QtWidgets\QDockWidget>
#include <QtWidgets\QStatusBar>
#include <QtCore\QSettings>

class MyMainWindow : public QMainWindow
{
public:
	MyMainWindow(QWidget* parent = nullptr) : QMainWindow(parent)
	{
		// setup main window
		setCentralWidget(new QWidget(this));

		// toolbar 1 setup
		toolbar1 = new QToolBar("Toolbar 1");
		toolbar1->setObjectName("Toolbar 1");
		addToolBar(Qt::TopToolBarArea, toolbar1);
		toolbar1->addAction("Toolbar 1", []() {});

		// toolbar 2
		toolbar2 = new QToolBar("Toolbar 2");
		toolbar2->setObjectName("Toolbar 2");
		addToolBar(Qt::TopToolBarArea, toolbar2);
		toolbar2->addAction("Toolbar 2", []() {});

		// dock examples
		dock1 = new QDockWidget("Dock 1", this);
		dock1->setObjectName("Dock 1");
		addDockWidget(Qt::LeftDockWidgetArea, dock1);
		dock2 = new QDockWidget("Dock 2", this);
		dock2->setObjectName("Dock 2");
		addDockWidget(Qt::LeftDockWidgetArea, dock2);

		// *** CRUX OF ISSUES *** //
		// setup toolbar 1 calls
		toolbar1->addAction("View 1", [this]()
		{
			// attempt 1 - PREFERRED - use remove? Issue 1. requires custom restore (why no restoreToolBar?)
			////QSettings settings;
			////settings.setValue(toolbar2->objectName(), toolbar2->saveGeometry()); 
			//removeToolBar(toolbar2); 

			// attempt 2 - setHidden? Issue 1. displays anyways if it was user-set to hidden; Issue 2. bad context menu entry
			toolbar2->setHidden(true);

			// attempt 3 - use QSettings? Issue 1. misses state - need more custom QSettings; Issue 2. bad context menu entry
			//QSettings settings;
			//settings.setValue(toolbar2->objectName(), toolbar2->saveGeometry()); 
			//toolbar2->setHidden(true); 

			// attempt 4 - custom use of QSettings? Main Issue: lots to save and "get right", including area, relative location in area, geometry, etc. 
			//QSettings settings;
			//settings.setValue(toolbar2->objectName() + "_floating", toolbar2->isFloating());
			//settings.setValue(toolbar2->objectName() + "_geometry", toolbar2->geometry());
			//settings.setValue(toolbar2->objectName() + "_visible", toolbar2->isVisible());
			//settings.setValue(toolbar2->objectName() + "_toolbararea", (unsigned)this->toolBarArea(toolbar2));
			//removeToolBar(toolbar2);

			// easy dock example - works fine!
			removeDockWidget(dock2);

			statusBar()->showMessage("View 1");
		});
		QAction* defaultView = toolbar1->addAction("View 2", [this]()
		{
			// attempt 1 - PREFERRED - use remove? Issue 1. requires custom restore (why no restoreToolBar?)
			////QSettings settings;
			////toolbar2->restoreGeometry(settings.value(toolbar2->objectName()).toByteArray()); 
			//addToolBar(toolbar2); // ? insertToolBar? need to save/restore: floating position and/or toolbar placement (top/left, etc.; after which toolbar(s); below which toolbar(s))
			//toolbar2->show(); // has bad placement

			// attempt 2 - setHidden? 1. displays anyways if it was user-set to hidden; 2. bad context menu entry
			toolbar2->setHidden(false);

			// attempt 3 - use QSettings? Issue 1. misses state - need more custom QSettings; Issue 2. bad context menu entry
			//QSettings settings;
			//toolbar2->restoreGeometry(settings.value(toolbar2->objectName()).toByteArray()); 
			//toolbar2->setHidden(false); 

			// attempt 4 - custom use of QSettings? Main Issue: lots to save and "get right", including area, relative location in area, geometry, etc. 
			//QSettings settings;
			//Qt::ToolBarArea area = ( Qt::ToolBarArea )settings.value(toolbar2->objectName() + "_toolbararea").toUInt();
			//addToolBar(area, toolbar2); // not right - may re-order toolbars
			//toolbar2->setVisible(settings.value(toolbar2->objectName() + "_visible").toBool());
			//bool isFloating = settings.value(toolbar2->objectName() + "_floating").toBool();
			//if ( isFloating )
			//	toolbar2->setWindowFlags(toolbar2->windowFlags() | Qt::FramelessWindowHint);
			//toolbar2->setGeometry(settings.value(toolbar2->objectName() + "_geometry").toRect());

			// easy dock example - works fine!
			restoreDockWidget(dock2);

			statusBar()->showMessage("View 2");
		});
		// *** END CRUX OF ISSUES *** //

		QAction* quitAction = toolbar1->addAction("Quit", [this]() { this->close(); });
		quitAction->setShortcut(Qt::Key_Q);

		resize(1200, 800);

		// its all setup - restore prior state
		LoadUI();

		// load default view
		defaultView->trigger();
	}

	void LoadUI()
	{
		// load settings from registry
		QSettings settings;
		QString sQState = "windowState";
		bool hasSettings = settings.contains(sQState);
		if ( hasSettings )
			restoreState(settings.value(sQState).toByteArray());
		QString sQGeometry = "windowGeometry";
		hasSettings = settings.contains(sQGeometry);
		if ( hasSettings )
			restoreGeometry(settings.value(sQGeometry).toByteArray());
	}

	void closeEvent(QCloseEvent* event)
	{
		QSettings settings;
		QString sQState = "windowState";
		settings.setValue(sQState, saveState());
		QString sQGeometry = "windowGeometry";
		settings.setValue(sQGeometry, saveGeometry());
	}

private:
	QToolBar *toolbar1, *toolbar2;
	QDockWidget *dock1, *dock2;
};

int main( int argc, char *argv[] )
{
	// setup application
	QApplication app( argc, argv );
	app.setOrganizationName("QtExample");
	app.setApplicationName("ToolBarSettingsBug");

	// setup main window
	MyMainWindow mainWin;

	mainWin.show();
	return app.exec();
}