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/*
* Copyright (c) 2012-2015 Christian Surlykke, Petr Vanek
*
* This file is part of qt-lightdm-greeter
* It is distributed under the LGPL 2.1 or later license.
* Please refer to the LICENSE file for a copy of the license.
*/
#include <QRect>
#include <QApplication>
#include <QDesktopWidget>
#include <QPalette>
#include <QString>
#include <QDebug>
#include "mainwindow.h"
#include "loginform.h"
#include "settings.h"
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);
setBackground();
// display login dialog only in the main screen
if (showLoginForm()) {
m_LoginForm = new LoginForm(this);
int maxX = screenRect.width() - m_LoginForm->width();
int maxY = screenRect.height() - m_LoginForm->height();
int defaultX = 10*maxX/100;
int defaultY = 50*maxY/100;
int offsetX = getOffset(Settings().offsetX(), maxX, defaultX);
int offsetY = getOffset(Settings().offsetY(), maxY, defaultY);
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 settingsOffset, int maxVal, int defaultVal)
{
int offset = defaultVal > maxVal ? maxVal : defaultVal;
if (! settingsOffset.isEmpty()) {
if (QRegExp("^\\d+px$", Qt::CaseInsensitive).exactMatch(settingsOffset)) {
offset = settingsOffset.left(settingsOffset.size() - 2).toInt();
if (offset > maxVal) offset = maxVal;
}
else if (QRegExp("^\\d+%$", Qt::CaseInsensitive).exactMatch(settingsOffset)) {
int offsetPct = settingsOffset.left(settingsOffset.size() -1).toInt();
if (offsetPct > 100) offsetPct = 100;
offset = (maxVal * offsetPct)/100;
}
else {
qWarning() << "Could not understand" << settingsOffset
<< "- must be of form <positivenumber>px or <positivenumber>%, e.g. 35px or 25%" ;
}
}
return offset;
}
void MainWindow::setBackground()
{
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";
}
}
QPalette palette;
QRect rect = QApplication::desktop()->screenGeometry(m_Screen);
if (backgroundImage.isNull()) {
palette.setColor(QPalette::Background, Qt::black);
}
else {
backgroundImage = backgroundImage.scaled(rect.width(), rect.height(), Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
int xoff = (backgroundImage.width() - rect.width()) / 2;
int yoff = (backgroundImage.height() - rect.height()) / 2;
QBrush brush(backgroundImage.copy(xoff, yoff, backgroundImage.width(), backgroundImage.height()));
palette.setBrush(this->backgroundRole(), brush);
}
this->setPalette(palette);
}
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