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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the examples of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    24 ** In addition, as a special exception, Nokia gives you certain additional

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "screenshot.h"

    45 

    46 //! [0]

    47 Screenshot::Screenshot()

    48 {

    49     screenshotLabel = new QLabel;

    50     screenshotLabel->setSizePolicy(QSizePolicy::Expanding,

    51                                    QSizePolicy::Expanding);

    52     screenshotLabel->setAlignment(Qt::AlignCenter);

    53     screenshotLabel->setMinimumSize(240, 160);

    54 

    55     createOptionsGroupBox();

    56     createButtonsLayout();

    57 

    58     mainLayout = new QVBoxLayout;

    59     mainLayout->addWidget(screenshotLabel);

    60     mainLayout->addWidget(optionsGroupBox);

    61     mainLayout->addLayout(buttonsLayout);

    62     setLayout(mainLayout);

    63 

    64     shootScreen();

    65     delaySpinBox->setValue(5);

    66 

    67     setWindowTitle(tr("Screenshot"));

    68     resize(300, 200);

    69 }

    70 //! [0]

    71 

    72 //! [1]

    73 void Screenshot::resizeEvent(QResizeEvent * /* event */)

    74 {

    75     QSize scaledSize = originalPixmap.size();

    76     scaledSize.scale(screenshotLabel->size(), Qt::KeepAspectRatio);

    77     if (!screenshotLabel->pixmap()

    78             || scaledSize != screenshotLabel->pixmap()->size())

    79         updateScreenshotLabel();

    80 }

    81 //! [1]

    82 

    83 //! [2]

    84 void Screenshot::newScreenshot()

    85 {

    86     if (hideThisWindowCheckBox->isChecked())

    87         hide();

    88     newScreenshotButton->setDisabled(true);

    89 

    90     QTimer::singleShot(delaySpinBox->value() * 1000, this, SLOT(shootScreen()));

    91 }

    92 //! [2]

    93 

    94 //! [3]

    95 void Screenshot::saveScreenshot()

    96 {

    97     QString format = "png";

    98     QString initialPath = QDir::currentPath() + tr("/untitled.") + format;

    99 

   100     QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),

   101                                initialPath,

   102                                tr("%1 Files (*.%2);;All Files (*)")

   103                                .arg(format.toUpper())

   104                                .arg(format));

   105     if (!fileName.isEmpty())

   106         originalPixmap.save(fileName, format.toAscii());

   107 }

   108 //! [3]

   109 

   110 //! [4]

   111 void Screenshot::shootScreen()

   112 {

   113     if (delaySpinBox->value() != 0)

   114         qApp->beep();

   115 //! [4]

   116     originalPixmap = QPixmap(); // clear image for low memory situations

   117                                 // on embedded devices.

   118 //! [5]

   119     originalPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());

   120     updateScreenshotLabel();

   121 

   122     newScreenshotButton->setDisabled(false);

   123     if (hideThisWindowCheckBox->isChecked())

   124         show();

   125 }

   126 //! [5]

   127 

   128 //! [6]

   129 void Screenshot::updateCheckBox()

   130 {

   131     if (delaySpinBox->value() == 0) {

   132         hideThisWindowCheckBox->setDisabled(true);

   133         hideThisWindowCheckBox->setChecked(false);

   134     }

   135     else

   136         hideThisWindowCheckBox->setDisabled(false);

   137 }

   138 //! [6]

   139 

   140 //! [7]

   141 void Screenshot::createOptionsGroupBox()

   142 {

   143     optionsGroupBox = new QGroupBox(tr("Options"));

   144 

   145     delaySpinBox = new QSpinBox;

   146     delaySpinBox->setSuffix(tr(" s"));

   147     delaySpinBox->setMaximum(60);

   148     connect(delaySpinBox, SIGNAL(valueChanged(int)), this, SLOT(updateCheckBox()));

   149 

   150     delaySpinBoxLabel = new QLabel(tr("Screenshot Delay:"));

   151 

   152     hideThisWindowCheckBox = new QCheckBox(tr("Hide This Window"));

   153 

   154     optionsGroupBoxLayout = new QGridLayout;

   155     optionsGroupBoxLayout->addWidget(delaySpinBoxLabel, 0, 0);

   156     optionsGroupBoxLayout->addWidget(delaySpinBox, 0, 1);

   157     optionsGroupBoxLayout->addWidget(hideThisWindowCheckBox, 1, 0, 1, 2);

   158     optionsGroupBox->setLayout(optionsGroupBoxLayout);

   159 }

   160 //! [7]

   161 

   162 //! [8]

   163 void Screenshot::createButtonsLayout()

   164 {

   165     newScreenshotButton = createButton(tr("New Screenshot"),

   166                                        this, SLOT(newScreenshot()));

   167 

   168     saveScreenshotButton = createButton(tr("Save Screenshot"),

   169                                         this, SLOT(saveScreenshot()));

   170 

   171     quitScreenshotButton = createButton(tr("Quit"), this, SLOT(close()));

   172 

   173     buttonsLayout = new QHBoxLayout;

   174     buttonsLayout->addStretch();

   175     buttonsLayout->addWidget(newScreenshotButton);

   176     buttonsLayout->addWidget(saveScreenshotButton);

   177     buttonsLayout->addWidget(quitScreenshotButton);

   178 }

   179 //! [8]

   180 

   181 //! [9]

   182 QPushButton *Screenshot::createButton(const QString &text, QWidget *receiver,

   183                                       const char *member)

   184 {

   185     QPushButton *button = new QPushButton(text);

   186     button->connect(button, SIGNAL(clicked()), receiver, member);

   187     return button;

   188 }

   189 //! [9]

   190 

   191 //! [10]

   192 void Screenshot::updateScreenshotLabel()

   193 {

   194     screenshotLabel->setPixmap(originalPixmap.scaled(screenshotLabel->size(),

   195                                                      Qt::KeepAspectRatio,

   196                                                      Qt::SmoothTransformation));

   197 }

   198 //! [10]