#include <QApplication>
#include <QWidget>
#include <QMainWindow>
#include <QDockWidget>

enum EPane {
	  PANE_TOP
	, PANE_BOTTOM
	, COUNT_PANE
};

void InitMainWindow(QMainWindow* pMainWindow)
{
	pMainWindow->show();
	pMainWindow->setWindowTitle("main window");
	pMainWindow->setDockNestingEnabled(true);
}

void InitDockWidgets(QMainWindow* pMainWindow, QDockWidget* paDockWidget)
{
	for (int i=0; i < COUNT_PANE; ++i)
	{
		QDockWidget* const p = paDockWidget + i;

		p->setParent(pMainWindow);
		p->setFeatures(QDockWidget::DockWidgetClosable | QDockWidget::DockWidgetMovable | QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetVerticalTitleBar);
		p->setAutoFillBackground(true);
		p->activateWindow();
	}
}

void SetDockWidget(QMainWindow* pMainWindow, QDockWidget* p, Qt::DockWidgetArea dockArea, const char* pTitle, int iRed, int iGreen, int iBlue)
{
	pMainWindow->addDockWidget(dockArea, p);
	
	p->setWindowTitle(pTitle);

	QPalette pal = p->palette();       
	QColor color;
	pal.setBrush(QPalette::Window, color.fromRgb(iRed,iGreen,iBlue));
	p->setPalette(pal);

	p->show();
}

int main(int argc, char* argv[])
{
	QApplication app(argc, argv);
	
	QMainWindow mainwin;
	QDockWidget aWidgets[COUNT_PANE];
	
	InitMainWindow(&mainwin);
	InitDockWidgets(&mainwin, aWidgets);
	
	SetDockWidget(&mainwin, aWidgets + PANE_TOP,    Qt::TopDockWidgetArea,    "top",    128,255,255);
	SetDockWidget(&mainwin, aWidgets + PANE_BOTTOM, Qt::BottomDockWidgetArea, "bottom", 255,128,255);
	
	return app.exec();
}