1 files changed, 126 insertions, 0 deletions
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
new file mode 100644
index 0000000..a8dbd21
--- /dev/null
+++ b/src/mainwindow.cpp
@@ -0,0 +1,126 @@
+/*
+* 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 {
+        QBrush brush(backgroundImage.scaled(rect.width(), rect.height()));
+        palette.setBrush(this->backgroundRole(), brush);
+    }
+    this->setPalette(palette);
+}
+
+