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home:alifax89:lxqt-lightdm-greeter
lxqt-lightdm-greeter
mainwindow.cpp
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File mainwindow.cpp of Package lxqt-lightdm-greeter
/* BEGIN_COMMON_COPYRIGHT_HEADER * (c)LGPL2+ * * LXDE-Qt - a lightweight, Qt based, desktop toolset * http://razor-qt.org * * Copyright: 2012 Christian Surlykke * * This program or library is free software; you can redistribute it * and/or modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 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 * Lesser General Public License for more details. * You should have received a copy of the GNU Lesser General * Public License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301 USA * * END_COMMON_COPYRIGHT_HEADER */ #include <QtCore/QRect> #include <QtGui/QApplication> #include <QtGui/QDesktopWidget> #include <QtGui/QPalette> #include <QtGui/QX11Info> #include <QString> #include <QDebug> #include <lxqt/lxqtsettings.h> #include "mainwindow.h" #include "loginform.h" #include "constants.h" using namespace LxQt; MainWindow::MainWindow(int screen, QWidget *parent) : QWidget(parent), m_Screen(screen) { setObjectName(QString("MainWindow_%1").arg(screen)); QRect screenRect = QApplication::desktop()->screenGeometry(screen); setGeometry(screenRect); setBackgroundImage(); // display login dialog only in the main screen if (showLoginForm()) { m_LoginForm = new LoginForm(this); int offsetX = getOffset(LOGINFORM_OFFSETX_KEY, screenRect.width() - m_LoginForm->width()); int offsetY = getOffset(LOGINFORM_OFFSETY_KEY, screenRect.height() - m_LoginForm->height()); m_LoginForm->move(offsetX, offsetY); m_LoginForm->show(); // This hack ensures that the primary screen will have focus // if there are more screens (move the mouse cursor in the center // of primary screen - not in the center of all X area). It // won't affect single-screen environments. int centerX = screenRect.width()/2 + screenRect.x(); int centerY = screenRect.height()/2 + screenRect.y(); QCursor::setPos(centerX, centerY); } } MainWindow::~MainWindow() { } bool MainWindow::showLoginForm() { return m_Screen == QApplication::desktop()->primaryScreen(); } void MainWindow::setFocus(Qt::FocusReason reason) { if (m_LoginForm) { m_LoginForm->setFocus(reason); } else { QWidget::setFocus(reason); } } int MainWindow::getOffset(QString key, int maxVal) { QSettings greeterSettings(CONFIG_FILE, QSettings::IniFormat); int offset = maxVal/2; if (greeterSettings.contains(key)) { QString offsetAsString = greeterSettings.value(key).toString(); if (QRegExp("^\\d+px$", Qt::CaseInsensitive).exactMatch(offsetAsString)) { offset = offsetAsString.left(offsetAsString.size() - 2).toInt(); if (offset > maxVal) offset = maxVal; } else if (QRegExp("^\\d+%$", Qt::CaseInsensitive).exactMatch(offsetAsString)) { int offsetPct = offsetAsString.left(offsetAsString.size() -1).toInt(); if (offsetPct > 100) offsetPct = 100; offset = (maxVal * offsetPct)/100; } else { qWarning() << "Could not understand" << key << "value:" << offsetAsString << "- must be of form <positivenumber>px or <positivenumber>%, e.g. 35px or 25%" ; } } return offset; } void MainWindow::setBackgroundImage() { QImage backgroundImage; QSettings greeterSettings(CONFIG_FILE, QSettings::IniFormat); if (greeterSettings.contains(BACKGROUND_IMAGE_KEY)) { QString pathToBackgroundImage = greeterSettings.value(BACKGROUND_IMAGE_KEY).toString(); backgroundImage = QImage(pathToBackgroundImage); if (backgroundImage.isNull()) { qWarning() << "Not able to read" << pathToBackgroundImage << "as image"; } } if (backgroundImage.isNull()) { backgroundImage = QImage(lxqtTheme.desktopBackground(m_Screen)); } QPalette palette; QRect rect = QApplication::desktop()->screenGeometry(m_Screen); QBrush brush(backgroundImage.scaled(rect.width(), rect.height())); palette.setBrush(this->backgroundRole(), brush); this->setPalette(palette); }
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