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357 lines
9.4 KiB
357 lines
9.4 KiB
/****************************************************************************
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**
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** Implementation of TQDesktopWidget class.
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the kernel module of the TQt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free TQt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
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** included in the packaging of this file. Licensees holding valid TQt
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** Commercial licenses may use this file in accordance with the TQt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#include "ntqdesktopwidget.h"
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#include "ntqapplication.h"
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#include "ntqobjectlist.h"
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#include "qt_x11_p.h"
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#include <cstdlib>
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// defined in qwidget_x11.cpp
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extern int qt_x11_create_desktop_on_screen;
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// defined in qapplication_x11.cpp
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extern Atom qt_net_workarea;
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extern bool qt_net_supports(Atom atom);
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// function to update the workarea of the screen
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static bool qt_desktopwidget_workarea_dirty = TRUE;
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void qt_desktopwidget_update_workarea()
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{
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qt_desktopwidget_workarea_dirty = TRUE;
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}
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class TQSingleDesktopWidget : public TQWidget
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{
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public:
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TQSingleDesktopWidget();
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~TQSingleDesktopWidget();
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};
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TQSingleDesktopWidget::TQSingleDesktopWidget()
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: TQWidget( 0, "desktop", WType_Desktop )
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{
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}
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TQSingleDesktopWidget::~TQSingleDesktopWidget()
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{
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while ( children() )
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removeChild( children()->getFirst() );
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}
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class TQDesktopWidgetPrivate
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{
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public:
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TQDesktopWidgetPrivate();
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~TQDesktopWidgetPrivate();
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void init();
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bool use_xinerama;
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int defaultScreen;
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int screenCount;
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TQWidget **screens;
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TQRect *rects;
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TQRect *workareas;
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};
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TQDesktopWidgetPrivate::TQDesktopWidgetPrivate()
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: use_xinerama(FALSE), defaultScreen(0), screenCount(1),
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screens( 0 ), rects( 0 ), workareas( 0 )
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{
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}
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TQDesktopWidgetPrivate::~TQDesktopWidgetPrivate()
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{
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if ( screens ) {
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for ( int i = 0; i < screenCount; ++i ) {
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if (i == defaultScreen) continue;
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delete screens[i];
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screens[i] = 0;
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}
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free(screens);
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}
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if ( rects ) delete [] rects;
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if ( workareas ) delete [] workareas;
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}
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void TQDesktopWidgetPrivate::init()
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{
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// get the screen count
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int newScreenCount;
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#ifndef TQT_NO_XINERAMA
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XineramaScreenInfo *xinerama_screeninfo = 0;
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int unused;
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use_xinerama = (XineramaQueryExtension(TQPaintDevice::x11AppDisplay(),
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&unused, &unused) &&
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XineramaIsActive(TQPaintDevice::x11AppDisplay()));
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if (use_xinerama) {
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xinerama_screeninfo =
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XineramaQueryScreens(TQPaintDevice::x11AppDisplay(), &newScreenCount);
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if (xinerama_screeninfo)
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defaultScreen = 0;
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} else
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#endif // TQT_NO_XINERAMA
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{
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defaultScreen = DefaultScreen(TQPaintDevice::x11AppDisplay());
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newScreenCount = ScreenCount(TQPaintDevice::x11AppDisplay());
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use_xinerama = false;
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}
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delete [] rects;
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rects = new TQRect[ newScreenCount ];
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delete [] workareas;
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workareas = new TQRect[ newScreenCount ];
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// get the geometry of each screen
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int i, j, x, y, w, h;
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for ( i = 0, j = 0; i < newScreenCount; i++ ) {
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#ifndef TQT_NO_XINERAMA
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if (use_xinerama) {
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x = xinerama_screeninfo[i].x_org;
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y = xinerama_screeninfo[i].y_org;
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w = xinerama_screeninfo[i].width;
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h = xinerama_screeninfo[i].height;
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} else
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#endif // TQT_NO_XINERAMA
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{
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x = 0;
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y = 0;
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w = WidthOfScreen(ScreenOfDisplay(TQPaintDevice::x11AppDisplay(), i));
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h = HeightOfScreen(ScreenOfDisplay(TQPaintDevice::x11AppDisplay(), i));
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}
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workareas[i] = TQRect();
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rects[j].setRect(x, y, w, h);
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// overlapping?
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if (j > 0 && rects[j-1].intersects(rects[j])) {
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// pick the bigger one, ignore the other
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if ((rects[j].width()*rects[j].height()) >
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(rects[j-1].width()*rects[j-1].height()))
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rects[j-1] = rects[j];
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}
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else
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j++;
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}
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if (screens) {
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// leaks TQWidget* pointers on purpose, can't delete them as pointer escapes
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screens = (TQWidget**) realloc(screens, j * sizeof(TQWidget*));
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if (j > screenCount)
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memset(&screens[screenCount], 0, (j-screenCount) * sizeof(TQWidget*));
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}
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screenCount = j;
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#ifndef TQT_NO_XINERAMA
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if (use_xinerama && screenCount == 1)
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use_xinerama = false;
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if (xinerama_screeninfo)
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XFree(xinerama_screeninfo);
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#endif // TQT_NO_XINERAMA
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}
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// the TQDesktopWidget itself will be created on the default screen
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// as qt_x11_create_desktop_on_screen defaults to -1
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TQDesktopWidget::TQDesktopWidget()
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: TQWidget( 0, "desktop", WType_Desktop )
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{
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d = new TQDesktopWidgetPrivate();
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/*
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we don't call d->init() here, since the initial resize event
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will end up calling init() a second time, which is inefficient.
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instead, for the sending of all posted event to the desktop
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widget (including the initial resize event, which calls
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d->init()).
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*/
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TQApplication::sendPostedEvents( this, 0 );
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}
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TQDesktopWidget::~TQDesktopWidget()
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{
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delete d;
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}
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bool TQDesktopWidget::isVirtualDesktop() const
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{
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return d->use_xinerama;
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}
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int TQDesktopWidget::primaryScreen() const
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{
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return d->defaultScreen;
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}
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int TQDesktopWidget::numScreens() const
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{
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return d->screenCount;
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}
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TQWidget *TQDesktopWidget::screen( int screen )
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{
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if (d->use_xinerama)
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return this;
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if ( screen < 0 || screen >= d->screenCount )
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screen = d->defaultScreen;
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if ( ! d->screens ) {
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d->screens = (TQWidget**) calloc( d->screenCount, sizeof(TQWidget*));
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d->screens[ d->defaultScreen ] = this;
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}
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if ( ! d->screens[screen] || // not created yet
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! d->screens[screen]->isDesktop() ) { // reparented away
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qt_x11_create_desktop_on_screen = screen;
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d->screens[screen] = new TQSingleDesktopWidget;
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qt_x11_create_desktop_on_screen = -1;
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}
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return d->screens[screen];
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}
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const TQRect& TQDesktopWidget::availableGeometry( int screen ) const
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{
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if ( qt_desktopwidget_workarea_dirty ) {
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// the workareas are dirty, invalidate them
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for ( int i = 0; i < d->screenCount; ++i )
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d->workareas[i] = TQRect();
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qt_desktopwidget_workarea_dirty = FALSE;
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}
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if ( screen < 0 || screen >= d->screenCount )
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screen = d->defaultScreen;
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if ( d->workareas[screen].isValid() )
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return d->workareas[screen];
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if ( ! isVirtualDesktop() && qt_net_supports( qt_net_workarea ) ) {
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Atom ret;
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int format, e;
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unsigned char *data = 0;
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unsigned long nitems, after;
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e = XGetWindowProperty( TQPaintDevice::x11AppDisplay(),
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TQPaintDevice::x11AppRootWindow( screen ),
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qt_net_workarea, 0, 4, False, XA_CARDINAL,
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&ret, &format, &nitems, &after, &data );
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if (e == Success && ret == XA_CARDINAL &&
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format == 32 && nitems == 4) {
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long *workarea = (long *) data;
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d->workareas[screen].setRect( workarea[0], workarea[1],
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workarea[2], workarea[3] );
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} else {
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d->workareas[screen] = screenGeometry(screen);
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}
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if ( data )
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XFree( data );
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} else {
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d->workareas[screen] = screenGeometry(screen);
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}
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return d->workareas[screen];
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}
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const TQRect& TQDesktopWidget::screenGeometry( int screen ) const
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{
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if ( screen < 0 || screen >= d->screenCount )
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screen = d->defaultScreen;
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return d->rects[ screen ];
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}
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int TQDesktopWidget::screenNumber( TQWidget *widget ) const
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{
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if ( !widget )
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return d->defaultScreen;
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#ifndef TQT_NO_XINERAMA
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if (d->use_xinerama) {
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// this is how we do it for xinerama
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TQRect frame = widget->frameGeometry();
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if ( !widget->isTopLevel() )
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frame.moveTopLeft( widget->mapToGlobal( TQPoint( 0, 0 ) ) );
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int maxSize = -1;
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int maxScreen = -1;
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for ( int i = 0; i < d->screenCount; ++i ) {
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TQRect sect = d->rects[i].intersect( frame );
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int size = sect.width() * sect.height();
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if ( size > maxSize && sect.width() > 0 && sect.height() > 0 ) {
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maxSize = size;
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maxScreen = i;
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}
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}
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return maxScreen;
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}
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#endif // TQT_NO_XINERAMA
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return widget->x11Screen();
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}
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int TQDesktopWidget::screenNumber( const TQPoint &point ) const
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{
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for ( int i = 0; i < d->screenCount; ++i ) {
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if ( d->rects[i].contains( point ) )
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return i;
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}
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return -1;
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}
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void TQDesktopWidget::resizeEvent( TQResizeEvent *event )
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{
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d->init();
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qt_desktopwidget_workarea_dirty = TRUE;
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TQWidget::resizeEvent( event );
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}
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