From kwin  Fri Oct 08 17:19:48 2010
From: Thomas =?iso-8859-1?q?L=FCbking?= <thomas.luebking () web ! de>
Date: Fri, 08 Oct 2010 17:19:48 +0000
To: kwin
Subject: semi-OT: broken input focus
Message-Id: <201010081919.48669.thomas.luebking () web ! de>
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This is maybe not really a kwin issue, but might be of interest.

Since "some" recent update (of Xorg, Qt?) i'm no longer able to set the input 
focus to windows after

XWMHints *hints = XGetWMHints ( QX11Info::display(), window()->winId() );
hints->input = false;
XSetWMHints ( QX11Info::display(), window()->winId(), hints );

... and i mean: "not at all".
Neither using QWidget::activateWindow() (used to work) nor 
KWindowSystem::activateWindow() nor even KWindowSystem::forceActiveWindow()
I also cannot even override the input focus from the rules anymore. And the 
focus policy (tried none) has no impact either.

I first thought this might be a recent bug in kwin, but it actually works with 
neither compiz nor metacity nor openbox.

It /does/ however work with [drumroll] IceWM... =\

Is anyone aware of recent changes in XWMHints or the clientmessage system?
Is it a general issue at all or only a localdistro one? (ie: can you reproduce 
this, testcase attached)
And why could IceWM keep working? (it does not ignore the hint, the inactive 
part of the client does not cause an activation)

Testcase attached, Workspace::allowClientActivation() figures "Activation: 
Belongs to active application", what /should/ result in a permittance ...


Cheers,
Thomas

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//compile: gcc -o focustest focustest.cpp -I /usr/include -I/usr/include/QtGui -lQtCore -lkdeui

#include <QApplication>
#include <QWidget>
#include <QX11Info>
#include <KDE/KWindowSystem>

#include <netwm.h>

class Widget : public QWidget
{
public:
    Widget() : QWidget() 
    {
        XWMHints *hints = XGetWMHints ( QX11Info::display(), window()->winId() );
        hints->input = false;
        XSetWMHints ( QX11Info::display(), window()->winId(), hints );
    }
protected:
    void mousePressEvent( QMouseEvent * )
    {
        activateWindow();
//         KWindowSystem::activateWindow( window()->winId() );
//         KWindowSystem::forceActiveWindow( window()->winId() );
    }
};

int main (int argc, char **argv)
{
    QApplication a(argc, argv);
    Widget *window = new Widget;
    window->resize( 640, 480 );
    window->show();
    return a.exec();
}
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