I've run into some odd behavior with tabified QDockWidgets, below is an example program with comments that demonstrates the behavior.
Is this a bug or is it expected behavior and I'm missing some nuance in QDockWidget that causes this?
Directly, since this does not work, how would one properly "undock" a hidden QDockWidget then display it?
#include <QApplication>
#include <QMainWindow>
#include <QAction>
#include <QDockWidget>
#include <QMenu>
#include <QSize>
#include <QMenuBar>
using namespace std;
int main (int argc, char* argv[])
{
QApplication app(argc, argv);
QMainWindow window;
QDockWidget dock1(&window);
QDockWidget dock2(&window);
QMenu menu("View");
dock1.setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
dock2.setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
dock1.setWindowTitle("Dock One");
dock2.setWindowTitle("Dock Two");
window.addDockWidget(Qt::RightDockWidgetArea, &dock1);
window.addDockWidget(Qt::RightDockWidgetArea, &dock2);
window.menuBar()->addMenu(&menu);
window.setMinimumSize(QSize(800, 600));
window.tabifyDockWidget(&dock1, &dock2);
dock1.hide();
dock2.hide();
menu.addAction(dock1.toggleViewAction());
menu.addAction(dock2.toggleViewAction());
window.show();
// Below is where the oddness starts. It seems to only exhibit the
// behavior if the dock widgets are tabified.
// Odd behavior here
// This does not work. the window never shows, though its menu action shows
// checked. Not only does this window not show up, but all toggle actions
// for all dock windows (e.g. dock1 and dock2) are broken for the duration
// of the application loop.
// dock1.setFloating(true);
// dock1.show();
// This does work. . . of course only if you do _not_ run the above first.
// however, you can often get a little lag or "blip" in the rendering as
// the dock is shown docked before setFloating is set to true.
dock1.show();
dock1.setFloating(true);
return app.exec();
}
