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List:       kde-devel
Subject:    Strange behaviour of keyPressEvent and KActions with shortcut
From:       "Albert 'TSDgeos' Astals Cid" <tsdgeos () terra ! es>
Date:       2003-07-20 22:00:42
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If it define a KAction with Left_arrow as shortcut, the widget's keyPressEvent 
function never receives an event for the press of Left_arrow. This is a 
strange behaviour as keyPressEvent should receive all the key events that 
happen in that widget (i think that is reasonable).

keyReleaseEvent does receive the release event.

Some code illustrating that.


#include <kapplication.h>
#include <kcmdlineargs.h>
#include <kaboutdata.h>
#include <kaction.h>
#include <kmainwindow.h>

class MyWidget : public KMainWindow
{
	public:
		MyWidget();
	protected:
		virtual void keyPressEvent( QKeyEvent *event );
		virtual void keyReleaseEvent( QKeyEvent *event );

	private:
		KAction *mAction;
};

MyWidget::MyWidget() : KMainWindow(0, 0, WType_Modal)
{
	mAction = new KAction(i18n("Move Left"), Qt::Key_Left, 0, 0, 
actionCollection(), "move_left");
	resize(500, 500);
	show();
}

void MyWidget::keyPressEvent(QKeyEvent* event)
{
	setCaption("Key Pressed");
	KKey key(event);
	if (mAction->shortcut().contains(key))
	{
		setCaption("Left Key Pressed");
	}
	else event->ignore();
}

void MyWidget::keyReleaseEvent(QKeyEvent* event)
{
	setCaption("Key Released");
	KKey key(event);
	if (mAction->shortcut().contains(key))
	{
		setCaption("Left Key Released");
	}
	else event->ignore();
}

int main(int argc, char *argv[])
{
	KAboutData *data = new KAboutData("a", "", "", "", 1, "",  0, 0, "");
	KCmdLineArgs::init(argc, argv, data);
	KApplication a(argc, argv);
	MyWidget *x = new MyWidget();
	a.setMainWidget(x);
	return a.exec();
}

 
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