Long live Qt 4.5!

4 files changed, 359 insertions, 0 deletions

diff --git a/examples/desktop/screenshot/main.cpp b/examples/desktop/screenshot/main.cpp
new file mode 100644
index 0000000..59e8674
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+++ b/examples/desktop/screenshot/main.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+
+#include "screenshot.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Screenshot screenshot;
+    screenshot.show();
+    return app.exec();
+}
diff --git a/examples/desktop/screenshot/screenshot.cpp b/examples/desktop/screenshot/screenshot.cpp
new file mode 100644
index 0000000..7d9545e
--- /dev/null
+++ b/examples/desktop/screenshot/screenshot.cpp
@@ -0,0 +1,198 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "screenshot.h"
+
+//! [0]
+Screenshot::Screenshot()
+{
+    screenshotLabel = new QLabel;
+    screenshotLabel->setSizePolicy(QSizePolicy::Expanding,
+                                   QSizePolicy::Expanding);
+    screenshotLabel->setAlignment(Qt::AlignCenter);
+    screenshotLabel->setMinimumSize(240, 160);
+
+    createOptionsGroupBox();
+    createButtonsLayout();
+
+    mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(screenshotLabel);
+    mainLayout->addWidget(optionsGroupBox);
+    mainLayout->addLayout(buttonsLayout);
+    setLayout(mainLayout);
+
+    shootScreen();
+    delaySpinBox->setValue(5);
+
+    setWindowTitle(tr("Screenshot"));
+    resize(300, 200);
+}
+//! [0]
+
+//! [1]
+void Screenshot::resizeEvent(QResizeEvent * /* event */)
+{
+    QSize scaledSize = originalPixmap.size();
+    scaledSize.scale(screenshotLabel->size(), Qt::KeepAspectRatio);
+    if (!screenshotLabel->pixmap()
+            || scaledSize != screenshotLabel->pixmap()->size())
+        updateScreenshotLabel();
+}
+//! [1]
+
+//! [2]
+void Screenshot::newScreenshot()
+{
+    if (hideThisWindowCheckBox->isChecked())
+        hide();
+    newScreenshotButton->setDisabled(true);
+
+    QTimer::singleShot(delaySpinBox->value() * 1000, this, SLOT(shootScreen()));
+}
+//! [2]
+
+//! [3]
+void Screenshot::saveScreenshot()
+{
+    QString format = "png";
+    QString initialPath = QDir::currentPath() + tr("/untitled.") + format;
+
+    QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
+                               initialPath,
+                               tr("%1 Files (*.%2);;All Files (*)")
+                               .arg(format.toUpper())
+                               .arg(format));
+    if (!fileName.isEmpty())
+        originalPixmap.save(fileName, format.toAscii());
+}
+//! [3]
+
+//! [4]
+void Screenshot::shootScreen()
+{
+    if (delaySpinBox->value() != 0)
+        qApp->beep();
+//! [4]
+    originalPixmap = QPixmap(); // clear image for low memory situations
+                                // on embedded devices.
+//! [5]
+    originalPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());
+    updateScreenshotLabel();
+
+    newScreenshotButton->setDisabled(false);
+    if (hideThisWindowCheckBox->isChecked())
+        show();
+}
+//! [5]
+
+//! [6]
+void Screenshot::updateCheckBox()
+{
+    if (delaySpinBox->value() == 0) {
+        hideThisWindowCheckBox->setDisabled(true);
+        hideThisWindowCheckBox->setChecked(false);
+    }
+    else
+        hideThisWindowCheckBox->setDisabled(false);
+}
+//! [6]
+
+//! [7]
+void Screenshot::createOptionsGroupBox()
+{
+    optionsGroupBox = new QGroupBox(tr("Options"));
+
+    delaySpinBox = new QSpinBox;
+    delaySpinBox->setSuffix(tr(" s"));
+    delaySpinBox->setMaximum(60);
+    connect(delaySpinBox, SIGNAL(valueChanged(int)), this, SLOT(updateCheckBox()));
+
+    delaySpinBoxLabel = new QLabel(tr("Screenshot Delay:"));
+
+    hideThisWindowCheckBox = new QCheckBox(tr("Hide This Window"));
+
+    optionsGroupBoxLayout = new QGridLayout;
+    optionsGroupBoxLayout->addWidget(delaySpinBoxLabel, 0, 0);
+    optionsGroupBoxLayout->addWidget(delaySpinBox, 0, 1);
+    optionsGroupBoxLayout->addWidget(hideThisWindowCheckBox, 1, 0, 1, 2);
+    optionsGroupBox->setLayout(optionsGroupBoxLayout);
+}
+//! [7]
+
+//! [8]
+void Screenshot::createButtonsLayout()
+{
+    newScreenshotButton = createButton(tr("New Screenshot"),
+                                       this, SLOT(newScreenshot()));
+
+    saveScreenshotButton = createButton(tr("Save Screenshot"),
+                                        this, SLOT(saveScreenshot()));
+
+    quitScreenshotButton = createButton(tr("Quit"), this, SLOT(close()));
+
+    buttonsLayout = new QHBoxLayout;
+    buttonsLayout->addStretch();
+    buttonsLayout->addWidget(newScreenshotButton);
+    buttonsLayout->addWidget(saveScreenshotButton);
+    buttonsLayout->addWidget(quitScreenshotButton);
+}
+//! [8]
+
+//! [9]
+QPushButton *Screenshot::createButton(const QString &text, QWidget *receiver,
+                                      const char *member)
+{
+    QPushButton *button = new QPushButton(text);
+    button->connect(button, SIGNAL(clicked()), receiver, member);
+    return button;
+}
+//! [9]
+
+//! [10]
+void Screenshot::updateScreenshotLabel()
+{
+    screenshotLabel->setPixmap(originalPixmap.scaled(screenshotLabel->size(),
+                                                     Qt::KeepAspectRatio,
+                                                     Qt::SmoothTransformation));
+}
+//! [10]
diff --git a/examples/desktop/screenshot/screenshot.h b/examples/desktop/screenshot/screenshot.h
new file mode 100644
index 0000000..ecc7724
--- /dev/null
+++ b/examples/desktop/screenshot/screenshot.h
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SCREENSHOT_H
+#define SCREENSHOT_H
+
+#include <QPixmap>
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QCheckBox;
+class QGridLayout;
+class QGroupBox;
+class QHBoxLayout;
+class QLabel;
+class QPushButton;
+class QSpinBox;
+class QVBoxLayout;
+QT_END_NAMESPACE
+
+//! [0]
+class Screenshot : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Screenshot();
+
+protected:
+    void resizeEvent(QResizeEvent *event);
+
+private slots:
+    void newScreenshot();
+    void saveScreenshot();
+    void shootScreen();
+    void updateCheckBox();
+
+private:
+    void createOptionsGroupBox();
+    void createButtonsLayout();
+    QPushButton *createButton(const QString &text, QWidget *receiver,
+                              const char *member);
+    void updateScreenshotLabel();
+
+    QPixmap originalPixmap;
+
+    QLabel *screenshotLabel;
+    QGroupBox *optionsGroupBox;
+    QSpinBox *delaySpinBox;
+    QLabel *delaySpinBoxLabel;
+    QCheckBox *hideThisWindowCheckBox;
+    QPushButton *newScreenshotButton;
+    QPushButton *saveScreenshotButton;
+    QPushButton *quitScreenshotButton;
+
+    QVBoxLayout *mainLayout;
+    QGridLayout *optionsGroupBoxLayout;
+    QHBoxLayout *buttonsLayout;
+};
+//! [0]
+
+#endif
diff --git a/examples/desktop/screenshot/screenshot.pro b/examples/desktop/screenshot/screenshot.pro
new file mode 100644
index 0000000..3ecbf8f
--- /dev/null
+++ b/examples/desktop/screenshot/screenshot.pro
@@ -0,0 +1,9 @@
+HEADERS             = screenshot.h
+SOURCES             = main.cpp \
+                      screenshot.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/desktop/screenshot
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS screenshot.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/desktop/screenshot
+INSTALLS += target sources