kmenubar.cpp
/* This file is part of the KDE libraries
Copyright (C) 1997, 1998, 1999, 2000 Sven Radej (radej@kde.org)
Copyright (C) 1997, 1998, 1999, 2000 Matthias Ettrich (ettrich@kde.org)
Copyright (C) 1999, 2000 Daniel "Mosfet" Duley (mosfet@kde.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDE_MENUITEM_DEF
#define INCLUDE_MENUITEM_DEF
#endif
#include "config.h"
#include <qevent.h>
#include <qobjectlist.h>
#include <qaccel.h>
#include <qpainter.h>
#include <qstyle.h>
#include <qtimer.h>
#include <kconfig.h>
#include <kglobalsettings.h>
#include <kmenubar.h>
#include <kapplication.h>
#include <kglobal.h>
#include <kdebug.h>
#include <kmanagerselection.h>
#ifdef Q_WS_X11
#include <kwin.h>
#include <kwinmodule.h>
#include <qxembed.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#endif
/*
Toplevel menubar (not for the fallback size handling done by itself):
- should not alter position or set strut
- every toplevel must have at most one matching topmenu
- embedder won't allow shrinking below a certain size
- must have WM_TRANSIENT_FOR pointing the its mainwindow
- the exception is desktop's menubar, which can be transient for root window
because of using root window as the desktop window
- Fitts' Law
*/
class KMenuBar::KMenuBarPrivate
{
public:
KMenuBarPrivate()
: forcedTopLevel( false ),
topLevel( false ),
wasTopLevel( false ),
#ifdef Q_WS_X11
selection( NULL ),
#endif
min_size( 0, 0 )
{
}
~KMenuBarPrivate()
{
#ifdef Q_WS_X11
delete selection;
#endif
}
bool forcedTopLevel;
bool topLevel;
bool wasTopLevel; // when TLW is fullscreen, remember state
int frameStyle; // only valid in toplevel mode
int lineWidth; // dtto
int margin; // dtto
bool fallback_mode; // dtto
#ifdef Q_WS_X11
KSelectionWatcher* selection;
#endif
QTimer selection_timer;
QSize min_size;
static Atom makeSelectionAtom();
};
#ifdef Q_WS_X11
static Atom selection_atom = None;
static Atom msg_type_atom = None;
static
void initAtoms()
{
char nm[ 100 ];
sprintf( nm, "_KDE_TOPMENU_OWNER_S%d", DefaultScreen( qt_xdisplay()));
char nm2[] = "_KDE_TOPMENU_MINSIZE";
char* names[ 2 ] = { nm, nm2 };
Atom atoms[ 2 ];
XInternAtoms( qt_xdisplay(), names, 2, False, atoms );
selection_atom = atoms[ 0 ];
msg_type_atom = atoms[ 1 ];
}
#endif
Atom KMenuBar::KMenuBarPrivate::makeSelectionAtom()
{
#ifdef Q_WS_X11
if( selection_atom == None )
initAtoms();
return selection_atom;
#else
return 0;
#endif
}
KMenuBar::KMenuBar(QWidget *parent, const char *name)
: QMenuBar(parent, name)
{
#ifdef Q_WS_X11
QXEmbed::initialize();
#endif
d = new KMenuBarPrivate;
connect( &d->selection_timer, SIGNAL( timeout()),
this, SLOT( selectionTimeout()));
connect( qApp->desktop(), SIGNAL( resized( int )), SLOT( updateFallbackSize()));
if ( kapp )
// toolbarAppearanceChanged(int) is sent when changing macstyle
connect( kapp, SIGNAL(toolbarAppearanceChanged(int)),
this, SLOT(slotReadConfig()));
slotReadConfig();
}
KMenuBar::~KMenuBar()
{
delete d;
}
void KMenuBar::setTopLevelMenu(bool top_level)
{
d->forcedTopLevel = top_level;
setTopLevelMenuInternal( top_level );
}
void KMenuBar::setTopLevelMenuInternal(bool top_level)
{
if (d->forcedTopLevel)
top_level = true;
d->wasTopLevel = top_level;
if( parentWidget()
&& parentWidget()->topLevelWidget()->isFullScreen())
top_level = false;
if ( isTopLevelMenu() == top_level )
return;
d->topLevel = top_level;
if ( isTopLevelMenu() )
{
#ifdef Q_WS_X11
d->selection = new KSelectionWatcher( KMenuBarPrivate::makeSelectionAtom(),
DefaultScreen( qt_xdisplay()));
connect( d->selection, SIGNAL( newOwner( Window )),
this, SLOT( updateFallbackSize()));
connect( d->selection, SIGNAL( lostOwner()),
this, SLOT( updateFallbackSize()));
#endif
d->frameStyle = frameStyle();
d->lineWidth = lineWidth();
d->margin = margin();
d->fallback_mode = false;
bool wasShown = !isHidden();
reparent( parentWidget(), WType_TopLevel | WStyle_Tool | WStyle_Customize | WStyle_NoBorder, QPoint(0,0), false );
#ifdef Q_WS_X11
KWin::setType( winId(), NET::TopMenu );
if( parentWidget())
XSetTransientForHint( qt_xdisplay(), winId(), parentWidget()->topLevelWidget()->winId());
#endif
QMenuBar::setFrameStyle( NoFrame );
QMenuBar::setLineWidth( 0 );
QMenuBar::setMargin( 0 );
updateFallbackSize();
d->min_size = QSize( 0, 0 );
if( parentWidget() && !parentWidget()->isTopLevel())
setShown( parentWidget()->isVisible());
else if ( wasShown )
show();
} else
{
#ifdef Q_WS_X11
delete d->selection;
d->selection = NULL;
#endif
setBackgroundMode( PaletteButton );
setFrameStyle( d->frameStyle );
setLineWidth( d->lineWidth );
setMargin( d->margin );
setMinimumSize( 0, 0 );
setMaximumSize( QWIDGETSIZE_MAX, QWIDGETSIZE_MAX );
updateMenuBarSize();
if ( parentWidget() )
reparent( parentWidget(), QPoint(0,0), !isHidden());
}
}
bool KMenuBar::isTopLevelMenu() const
{
return d->topLevel;
}
// KDE4 remove
void KMenuBar::show()
{
QMenuBar::show();
}
void KMenuBar::slotReadConfig()
{
KConfig *config = KGlobal::config();
KConfigGroupSaver saver( config, "KDE" );
setTopLevelMenuInternal( config->readBoolEntry( "macStyle", false ) );
}
bool KMenuBar::eventFilter(QObject *obj, QEvent *ev)
{
if ( d->topLevel )
{
if ( parentWidget() && obj == parentWidget()->topLevelWidget() )
{
if( ev->type() == QEvent::Resize )
return false; // ignore resizing of parent, QMenuBar would try to adjust size
if ( ev->type() == QEvent::Accel || ev->type() == QEvent::AccelAvailable )
{
if ( QApplication::sendEvent( topLevelWidget(), ev ) )
return true;
}
if(ev->type() == QEvent::ShowFullScreen )
// will update the state properly
setTopLevelMenuInternal( d->topLevel );
}
if( parentWidget() && obj == parentWidget() && ev->type() == QEvent::Reparent )
{
#ifdef Q_WS_X11
XSetTransientForHint( qt_xdisplay(), winId(), parentWidget()->topLevelWidget()->winId());
#else
//TODO: WIN32?
#endif
setShown( parentWidget()->isTopLevel() || parentWidget()->isVisible());
}
if( parentWidget() && !parentWidget()->isTopLevel() && obj == parentWidget())
{ // if the parent is not toplevel, KMenuBar needs to match its visibility status
if( ev->type() == QEvent::Show )
{
#ifdef Q_WS_X11
XSetTransientForHint( qt_xdisplay(), winId(), parentWidget()->topLevelWidget()->winId());
#else
//TODO: WIN32?
#endif
show();
}
if( ev->type() == QEvent::Hide )
hide();
}
}
else
{
if( parentWidget() && obj == parentWidget()->topLevelWidget())
{
if( ev->type() == QEvent::WindowStateChange
&& !parentWidget()->topLevelWidget()->isFullScreen() )
setTopLevelMenuInternal( d->wasTopLevel );
}
}
return QMenuBar::eventFilter( obj, ev );
}
// KDE4 remove
void KMenuBar::showEvent( QShowEvent *e )
{
QMenuBar::showEvent(e);
}
void KMenuBar::updateFallbackSize()
{
if( !d->topLevel )
return;
#ifdef Q_WS_X11
if( d->selection->owner() != None )
#endif
{ // somebody is managing us, don't mess anything, undo changes
// done in fallback mode if needed
d->selection_timer.stop();
if( d->fallback_mode )
{
d->fallback_mode = false;
// KWin::setStrut( winId(), 0, 0, 0, 0 ); KWin will set strut as it will see fit
setMinimumSize( 0, 0 );
setMaximumSize( QWIDGETSIZE_MAX, QWIDGETSIZE_MAX );
updateMenuBarSize();
}
return;
}
if( d->selection_timer.isActive())
return;
d->selection_timer.start( 100, true );
}
void KMenuBar::selectionTimeout()
{ // nobody is managing us, handle resizing
if ( d->topLevel )
{
d->fallback_mode = true; // KMenuBar is handling its position itself
KConfigGroup xineramaConfig(KGlobal::config(),"Xinerama");
int screen = xineramaConfig.readNumEntry("MenubarScreen",
QApplication::desktop()->screenNumber(QPoint(0,0)) );
QRect area = QApplication::desktop()->screenGeometry(screen);
int margin = 0;
move(area.left() - margin, area.top() - margin);
setFixedSize(area.width() + 2* margin , heightForWidth( area.width() + 2 * margin ) );
#ifdef Q_WS_X11
int strut_height = height() - margin;
if( strut_height < 0 )
strut_height = 0;
KWin::setStrut( winId(), 0, 0, strut_height, 0 );
#endif
}
}
int KMenuBar::block_resize = 0;
void KMenuBar::resizeEvent( QResizeEvent *e )
{
if( e->spontaneous() && d->topLevel && !d->fallback_mode )
{
++block_resize; // do not respond with configure request to ConfigureNotify event
QMenuBar::resizeEvent(e); // to avoid possible infinite loop
--block_resize;
}
else
QMenuBar::resizeEvent(e);
}
void KMenuBar::setGeometry( const QRect& r )
{
setGeometry( r.x(), r.y(), r.width(), r.height() );
}
void KMenuBar::setGeometry( int x, int y, int w, int h )
{
if( block_resize > 0 )
{
move( x, y );
return;
}
checkSize( w, h );
if( geometry() != QRect( x, y, w, h ))
QMenuBar::setGeometry( x, y, w, h );
}
void KMenuBar::resize( int w, int h )
{
if( block_resize > 0 )
return;
checkSize( w, h );
if( size() != QSize( w, h ))
QMenuBar::resize( w, h );
// kdDebug() << "RS:" << w << ":" << h << ":" << width() << ":" << height() << ":" << minimumWidth() << ":" << minimumHeight() << endl;
}
void KMenuBar::checkSize( int& w, int& h )
{
if( !d->topLevel || d->fallback_mode )
return;
QSize s = sizeHint();
w = s.width();
h = s.height();
// This is not done as setMinimumSize(), because that would set the minimum
// size in WM_NORMAL_HINTS, and KWin would not allow changing to smaller size
// anymore
w = KMAX( w, d->min_size.width());
h = KMAX( h, d->min_size.height());
}
// QMenuBar's sizeHint() gives wrong size (insufficient width), which causes wrapping in the kicker applet
QSize KMenuBar::sizeHint() const
{
if( !d->topLevel || block_resize > 0 )
return QMenuBar::sizeHint();
// Since QMenuBar::sizeHint() may indirectly call resize(),
// avoid infinite recursion.
++block_resize;
// find the minimum useful height, and enlarge the width until the menu fits in that height (one row)
int h = heightForWidth( 1000000 );
int w = QMenuBar::sizeHint().width();
// optimization - don't call heightForWidth() too many times
while( heightForWidth( w + 12 ) > h )
w += 12;
while( heightForWidth( w + 4 ) > h )
w += 4;
while( heightForWidth( w ) > h )
++w;
--block_resize;
return QSize( w, h );
}
#ifdef Q_WS_X11
bool KMenuBar::x11Event( XEvent* ev )
{
if( ev->type == ClientMessage && ev->xclient.message_type == msg_type_atom
&& ev->xclient.window == winId())
{
// QMenuBar is trying really hard to keep the size it deems right.
// Forcing minimum size and blocking resizing to match parent size
// in checkResizingToParent() seem to be the only way to make
// KMenuBar keep the size it wants
d->min_size = QSize( ev->xclient.data.l[ 1 ], ev->xclient.data.l[ 2 ] );
// kdDebug() << "MINSIZE:" << d->min_size << endl;
updateMenuBarSize();
return true;
}
return QMenuBar::x11Event( ev );
}
#endif
void KMenuBar::updateMenuBarSize()
{
menuContentsChanged(); // trigger invalidating calculated size
resize( sizeHint()); // and resize to preferred size
}
void KMenuBar::setFrameStyle( int style )
{
if( d->topLevel )
d->frameStyle = style;
else
QMenuBar::setFrameStyle( style );
}
void KMenuBar::setLineWidth( int width )
{
if( d->topLevel )
d->lineWidth = width;
else
QMenuBar::setLineWidth( width );
}
void KMenuBar::setMargin( int margin )
{
if( d->topLevel )
d->margin = margin;
else
QMenuBar::setMargin( margin );
}
void KMenuBar::closeEvent( QCloseEvent* e )
{
if( d->topLevel )
e->ignore(); // mainly for the fallback mode
else
QMenuBar::closeEvent( e );
}
void KMenuBar::drawContents( QPainter* p )
{
// Closes the BR77113
// We need to overload this method to paint only the menu items
// This way when the KMenuBar is embedded in the menu applet it
// integrates correctly.
//
// Background mode and origin are set so late because of styles
// using the polish() method to modify these settings.
//
// Of course this hack can safely be removed when real transparency
// will be available
if( !d->topLevel )
{
QMenuBar::drawContents(p);
}
else
{
bool up_enabled = isUpdatesEnabled();
BackgroundMode bg_mode = backgroundMode();
BackgroundOrigin bg_origin = backgroundOrigin();
setUpdatesEnabled(false);
setBackgroundMode(X11ParentRelative);
setBackgroundOrigin(WindowOrigin);
p->eraseRect( rect() );
erase();
QColorGroup g = colorGroup();
bool e;
for ( int i=0; i<(int)count(); i++ )
{
QMenuItem *mi = findItem( idAt( i ) );
if ( !mi->text().isNull() || mi->pixmap() )
{
QRect r = itemRect(i);
if(r.isEmpty() || !mi->isVisible())
continue;
e = mi->isEnabledAndVisible();
if ( e )
g = isEnabled() ? ( isActiveWindow() ? palette().active() :
palette().inactive() ) : palette().disabled();
else
g = palette().disabled();
bool item_active = ( actItem == i );
p->setClipRect(r);
if( item_active )
{
QStyle::SFlags flags = QStyle::Style_Default;
if (isEnabled() && e)
flags |= QStyle::Style_Enabled;
if ( item_active )
flags |= QStyle::Style_Active;
if ( item_active && actItemDown )
flags |= QStyle::Style_Down;
flags |= QStyle::Style_HasFocus;
style().drawControl(QStyle::CE_MenuBarItem, p, this,
r, g, flags, QStyleOption(mi));
}
else
{
style().drawItem(p, r, AlignCenter | AlignVCenter | ShowPrefix,
g, e, mi->pixmap(), mi->text());
}
}
}
setBackgroundOrigin(bg_origin);
setBackgroundMode(bg_mode);
setUpdatesEnabled(up_enabled);
}
}
void KMenuBar::virtual_hook( int, void* )
{ /*BASE::virtual_hook( id, data );*/ }
#include "kmenubar.moc"
KWin::setType
static void setType(WId win, NET::WindowType windowType)
KWin::setStrut
static void setStrut(WId win, int left, int right, int top, int bottom)
KMAX
#define KMAX(a, b)
KConfigGroupSaver
KConfigGroup
KConfig
KConfig::readBoolEntry
bool readBoolEntry(const QString &pKey, bool bDefault=false) const
KGlobal::config
static KConfig * config()

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