--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/kernel/qdesktopwidget_x11.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,415 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qapplication.h"
+#include "qdesktopwidget.h"
+#include "qlibrary.h"
+#include "qt_x11_p.h"
+#include "qvariant.h"
+#include "qwidget_p.h"
+#include "qx11info_x11.h"
+#include <limits.h>
+
+QT_BEGIN_NAMESPACE
+
+// defined in qwidget_x11.cpp
+extern int qt_x11_create_desktop_on_screen;
+
+
+// function to update the workarea of the screen
+static bool qt_desktopwidget_workarea_dirty = true;
+void qt_desktopwidget_update_workarea()
+{
+ qt_desktopwidget_workarea_dirty = true;
+}
+
+
+class QSingleDesktopWidget : public QWidget
+{
+public:
+ QSingleDesktopWidget();
+ ~QSingleDesktopWidget();
+};
+
+QSingleDesktopWidget::QSingleDesktopWidget()
+ : QWidget(0, Qt::Desktop)
+{
+}
+
+QSingleDesktopWidget::~QSingleDesktopWidget()
+{
+ const QObjectList &childList = children();
+ for (int i = childList.size(); i > 0 ;) {
+ --i;
+ childList.at(i)->setParent(0);
+ }
+}
+
+
+class QDesktopWidgetPrivate : public QWidgetPrivate
+{
+public:
+ QDesktopWidgetPrivate();
+ ~QDesktopWidgetPrivate();
+
+ void init();
+
+ bool use_xinerama;
+ int defaultScreen;
+ int screenCount;
+
+ QWidget **screens;
+ QRect *rects;
+ QRect *workareas;
+};
+
+QDesktopWidgetPrivate::QDesktopWidgetPrivate()
+ : use_xinerama(false), defaultScreen(0), screenCount(1),
+ screens(0), rects(0), workareas(0)
+{
+}
+
+QDesktopWidgetPrivate::~QDesktopWidgetPrivate()
+{
+ if (screens) {
+ for (int i = 0; i < screenCount; ++i) {
+ if (i == defaultScreen) continue;
+ delete screens[i];
+ screens[i] = 0;
+ }
+
+ free (screens);
+ }
+
+ if (rects) delete [] rects;
+ if (workareas) delete [] workareas;
+}
+
+void QDesktopWidgetPrivate::init()
+{
+ // get the screen count
+ int newScreenCount = ScreenCount(X11->display);
+#ifndef QT_NO_XINERAMA
+
+ XineramaScreenInfo *xinerama_screeninfo = 0;
+
+ // we ignore the Xinerama extension when using the display is
+ // using traditional multi-screen (with multiple root windows)
+ if (newScreenCount == 1
+ && X11->ptrXineramaQueryExtension
+ && X11->ptrXineramaIsActive
+ && X11->ptrXineramaQueryScreens) {
+ int unused;
+ use_xinerama = (X11->ptrXineramaQueryExtension(X11->display, &unused, &unused)
+ && X11->ptrXineramaIsActive(X11->display));
+ }
+
+ if (use_xinerama) {
+ xinerama_screeninfo =
+ X11->ptrXineramaQueryScreens(X11->display, &newScreenCount);
+ }
+
+ if (xinerama_screeninfo) {
+ defaultScreen = 0;
+ } else
+#endif // QT_NO_XINERAMA
+ {
+ defaultScreen = DefaultScreen(X11->display);
+ newScreenCount = ScreenCount(X11->display);
+ use_xinerama = false;
+ }
+
+ delete [] rects;
+ rects = new QRect[newScreenCount];
+ delete [] workareas;
+ workareas = new QRect[newScreenCount];
+
+ // get the geometry of each screen
+ int i, j, x, y, w, h;
+ for (i = 0, j = 0; i < newScreenCount; i++, j++) {
+
+#ifndef QT_NO_XINERAMA
+ if (use_xinerama) {
+ x = xinerama_screeninfo[i].x_org;
+ y = xinerama_screeninfo[i].y_org;
+ w = xinerama_screeninfo[i].width;
+ h = xinerama_screeninfo[i].height;
+ } else
+#endif // QT_NO_XINERAMA
+ {
+ x = 0;
+ y = 0;
+ w = WidthOfScreen(ScreenOfDisplay(X11->display, i));
+ h = HeightOfScreen(ScreenOfDisplay(X11->display, i));
+ }
+
+ rects[j].setRect(x, y, w, h);
+
+ if (use_xinerama && j > 0 && rects[j-1].intersects(rects[j])) {
+ // merge a "cloned" screen with the previous, hiding all crtcs
+ // that are currently showing a sub-rect of the previous screen
+ if ((rects[j].width()*rects[j].height()) >
+ (rects[j-1].width()*rects[j-1].height()))
+ rects[j-1] = rects[j];
+ j--;
+ }
+
+ workareas[i] = QRect();
+ }
+
+ if (screens) {
+ // leaks QWidget* pointers on purpose, can't delete them as pointer escapes
+ screens = q_check_ptr((QWidget**) realloc(screens, j * sizeof(QWidget*)));
+ if (j > screenCount)
+ memset(&screens[screenCount], 0, (j-screenCount) * sizeof(QWidget*));
+ }
+
+ screenCount = j;
+
+#ifndef QT_NO_XINERAMA
+ if (use_xinerama && screenCount == 1)
+ use_xinerama = false;
+
+ if (xinerama_screeninfo)
+ XFree(xinerama_screeninfo);
+#endif // QT_NO_XINERAMA
+
+}
+
+// the QDesktopWidget itself will be created on the default screen
+// as qt_x11_create_desktop_on_screen defaults to -1
+QDesktopWidget::QDesktopWidget()
+ : QWidget(*new QDesktopWidgetPrivate, 0, Qt::Desktop)
+{
+ Q_D(QDesktopWidget);
+ d->init();
+}
+
+QDesktopWidget::~QDesktopWidget()
+{
+}
+
+bool QDesktopWidget::isVirtualDesktop() const
+{
+ Q_D(const QDesktopWidget);
+ return d->use_xinerama;
+}
+
+int QDesktopWidget::primaryScreen() const
+{
+ Q_D(const QDesktopWidget);
+ return d->defaultScreen;
+}
+
+int QDesktopWidget::numScreens() const
+{
+ Q_D(const QDesktopWidget);
+ return d->screenCount;
+}
+
+QWidget *QDesktopWidget::screen(int screen)
+{
+ Q_D(QDesktopWidget);
+ if (d->use_xinerama)
+ return this;
+
+ if (screen < 0 || screen >= d->screenCount)
+ screen = d->defaultScreen;
+
+ if (! d->screens) {
+ d->screens = (QWidget**) calloc( d->screenCount, sizeof(QWidget*));
+ d->screens[d->defaultScreen] = this;
+ }
+
+ if (! d->screens[screen] || // not created yet
+ ! (d->screens[screen]->windowType() == Qt::Desktop)) { // reparented away
+ qt_x11_create_desktop_on_screen = screen;
+ d->screens[screen] = new QSingleDesktopWidget;
+ qt_x11_create_desktop_on_screen = -1;
+ }
+
+ return d->screens[screen];
+}
+
+const QRect QDesktopWidget::availableGeometry(int screen) const
+{
+ Q_D(const QDesktopWidget);
+ if (qt_desktopwidget_workarea_dirty) {
+ // the workareas are dirty, invalidate them
+ for (int i = 0; i < d->screenCount; ++i)
+ d->workareas[i] = QRect();
+ qt_desktopwidget_workarea_dirty = false;
+ }
+
+ if (screen < 0 || screen >= d->screenCount)
+ screen = d->defaultScreen;
+
+ if (d->workareas[screen].isValid())
+ return d->workareas[screen];
+
+ if (X11->isSupportedByWM(ATOM(_NET_WORKAREA))) {
+ int x11Screen = isVirtualDesktop() ? DefaultScreen(X11->display) : screen;
+
+ Atom ret;
+ int format, e;
+ unsigned char *data = 0;
+ unsigned long nitems, after;
+
+ e = XGetWindowProperty(X11->display,
+ QX11Info::appRootWindow(x11Screen),
+ ATOM(_NET_WORKAREA), 0, 4, False, XA_CARDINAL,
+ &ret, &format, &nitems, &after, &data);
+
+ QRect workArea;
+ if (e == Success && ret == XA_CARDINAL &&
+ format == 32 && nitems == 4) {
+ long *workarea = (long *) data;
+ workArea = QRect(workarea[0], workarea[1], workarea[2], workarea[3]);
+ } else {
+ workArea = screenGeometry(screen);
+ }
+
+ if (isVirtualDesktop()) {
+ // intersect the workarea (which spawns all Xinerama screens) with the rect for the
+ // requested screen
+ workArea &= screenGeometry(screen);
+ }
+
+ d->workareas[screen] = workArea;
+
+ if (data)
+ XFree(data);
+ } else {
+ d->workareas[screen] = screenGeometry(screen);
+ }
+
+ return d->workareas[screen];
+}
+
+const QRect QDesktopWidget::screenGeometry(int screen) const
+{
+ Q_D(const QDesktopWidget);
+ if (screen < 0 || screen >= d->screenCount)
+ screen = d->defaultScreen;
+
+ return d->rects[screen];
+}
+
+int QDesktopWidget::screenNumber(const QWidget *widget) const
+{
+ Q_D(const QDesktopWidget);
+ if (!widget)
+ return d->defaultScreen;
+
+#ifndef QT_NO_XINERAMA
+ if (d->use_xinerama) {
+ // this is how we do it for xinerama
+ QRect frame = widget->frameGeometry();
+ if (!widget->isWindow())
+ frame.moveTopLeft(widget->mapToGlobal(QPoint(0, 0)));
+
+ int maxSize = -1;
+ int maxScreen = -1;
+
+ for (int i = 0; i < d->screenCount; ++i) {
+ QRect sect = d->rects[i].intersected(frame);
+ int size = sect.width() * sect.height();
+ if (size > maxSize && sect.width() > 0 && sect.height() > 0) {
+ maxSize = size;
+ maxScreen = i;
+ }
+ }
+ return maxScreen;
+ }
+#endif // QT_NO_XINERAMA
+
+ return widget->x11Info().screen();
+}
+
+int QDesktopWidget::screenNumber(const QPoint &point) const
+{
+ Q_D(const QDesktopWidget);
+ int closestScreen = -1;
+ int shortestDistance = INT_MAX;
+ for (int i = 0; i < d->screenCount; ++i) {
+ int thisDistance = d->pointToRect(point, d->rects[i]);
+ if (thisDistance < shortestDistance) {
+ shortestDistance = thisDistance;
+ closestScreen = i;
+ }
+ }
+ return closestScreen;
+}
+
+void QDesktopWidget::resizeEvent(QResizeEvent *event)
+{
+ Q_D(QDesktopWidget);
+ int oldScreenCount = d->screenCount;
+ QVector<QRect> oldRects(oldScreenCount);
+ QVector<QRect> oldWorks(oldScreenCount);
+ for (int i = 0; i < oldScreenCount; ++i) {
+ oldRects[i] = d->rects[i];
+ oldWorks[i] = d->workareas[i];
+ }
+
+ d->init();
+
+ for (int i = 0; i < qMin(oldScreenCount, d->screenCount); ++i) {
+ if (oldRects.at(i) != d->rects[i])
+ emit resized(i);
+ }
+
+ // ### workareas are just reset by init, not filled with new values
+ // ### so this will not work correctly
+ for (int j = 0; j < qMin(oldScreenCount, d->screenCount); ++j) {
+ if (oldWorks.at(j) != d->workareas[j])
+ emit workAreaResized(j);
+ }
+
+ if (oldScreenCount != d->screenCount) {
+ emit screenCountChanged(d->screenCount);
+ }
+
+ qt_desktopwidget_workarea_dirty = true;
+ QWidget::resizeEvent(event);
+}
+
+QT_END_NAMESPACE