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# widgetgallery.cpp Example File
widgets/styles/widgetgallery.cpp

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        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
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    ** information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
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    ** not clear to you.
        **
        ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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        #include <QtGui>

        #include "norwegianwoodstyle.h"
        #include "widgetgallery.h"

        WidgetGallery::WidgetGallery(QWidget *parent)
            : QDialog(parent)
        {
            originalPalette = QApplication::palette();

            styleComboBox = new QComboBox;
            styleComboBox->addItem("NorwegianWood");
            styleComboBox->addItems(QStyleFactory::keys());

            styleLabel = new QLabel(tr("&Style:"));
            styleLabel->setBuddy(styleComboBox);

            useStylePaletteCheckBox = new QCheckBox(tr("&Use style's standard palette"));
            useStylePaletteCheckBox->setChecked(true);

            disableWidgetsCheckBox = new QCheckBox(tr("&Disable widgets"));

            createTopLeftGroupBox();
            createTopRightGroupBox();
            createBottomLeftTabWidget();
            createBottomRightGroupBox();
            createProgressBar();

            connect(styleComboBox, SIGNAL(activated(const QString &)),
                    this, SLOT(changeStyle(const QString &)));
            connect(useStylePaletteCheckBox, SIGNAL(toggled(bool)),
                    this, SLOT(changePalette()));
            connect(disableWidgetsCheckBox, SIGNAL(toggled(bool)),
                    topLeftGroupBox, SLOT(setDisabled(bool)));
            connect(disableWidgetsCheckBox, SIGNAL(toggled(bool)),
                    topRightGroupBox, SLOT(setDisabled(bool)));
            connect(disableWidgetsCheckBox, SIGNAL(toggled(bool)),
                    bottomLeftTabWidget, SLOT(setDisabled(bool)));
            connect(disableWidgetsCheckBox, SIGNAL(toggled(bool)),
                    bottomRightGroupBox, SLOT(setDisabled(bool)));

            QHBoxLayout *topLayout = new QHBoxLayout;
            topLayout->addWidget(styleLabel);
            topLayout->addWidget(styleComboBox);
            topLayout->addStretch(1);
            topLayout->addWidget(useStylePaletteCheckBox);
            topLayout->addWidget(disableWidgetsCheckBox);

            QGridLayout *mainLayout = new QGridLayout;
            mainLayout->addLayout(topLayout, 0, 0, 1, 2);
            mainLayout->addWidget(topLeftGroupBox, 1, 0);
            mainLayout->addWidget(topRightGroupBox, 1, 1);
            mainLayout->addWidget(bottomLeftTabWidget, 2, 0);
            mainLayout->addWidget(bottomRightGroupBox, 2, 1);
            mainLayout->addWidget(progressBar, 3, 0, 1, 2);
            mainLayout->setRowStretch(1, 1);
            mainLayout->setRowStretch(2, 1);
            mainLayout->setColumnStretch(0, 1);
            mainLayout->setColumnStretch(1, 1);
            setLayout(mainLayout);

            setWindowTitle(tr("Styles"));
            changeStyle("NorwegianWood");
        }

        void WidgetGallery::changeStyle(const QString &styleName)
        {
            if (styleName == "NorwegianWood") {
                QApplication::setStyle(new NorwegianWoodStyle);
            } else {
                QApplication::setStyle(QStyleFactory::create(styleName));
            }
            changePalette();
        }

        void WidgetGallery::changePalette()
        {
            if (useStylePaletteCheckBox->isChecked())
                QApplication::setPalette(QApplication::style()->standardPalette());
            else
                QApplication::setPalette(originalPalette);
        }

        void WidgetGallery::advanceProgressBar()
        {
            int curVal = progressBar->value();
            int maxVal = progressBar->maximum();
            progressBar->setValue(curVal + (maxVal - curVal) / 100);
        }

        void WidgetGallery::createTopLeftGroupBox()
        {
            topLeftGroupBox = new QGroupBox(tr("Group 1"));

            radioButton1 = new QRadioButton(tr("Radio button 1"));
            radioButton2 = new QRadioButton(tr("Radio button 2"));
            radioButton3 = new QRadioButton(tr("Radio button 3"));
            radioButton1->setChecked(true);

            checkBox = new QCheckBox(tr("Tri-state check box"));
            checkBox->setTristate(true);
            checkBox->setCheckState(Qt::PartiallyChecked);

            QVBoxLayout *layout = new QVBoxLayout;
            layout->addWidget(radioButton1);
            layout->addWidget(radioButton2);
            layout->addWidget(radioButton3);
            layout->addWidget(checkBox);
            layout->addStretch(1);
            topLeftGroupBox->setLayout(layout);
        }

        void WidgetGallery::createTopRightGroupBox()
        {
            topRightGroupBox = new QGroupBox(tr("Group 2"));

            defaultPushButton = new QPushButton(tr("Default Push Button"));
            defaultPushButton->setDefault(true);

            togglePushButton = new QPushButton(tr("Toggle Push Button"));
            togglePushButton->setCheckable(true);
            togglePushButton->setChecked(true);

            flatPushButton = new QPushButton(tr("Flat Push Button"));
            flatPushButton->setFlat(true);

            QVBoxLayout *layout = new QVBoxLayout;
            layout->addWidget(defaultPushButton);
            layout->addWidget(togglePushButton);
            layout->addWidget(flatPushButton);
            layout->addStretch(1);
            topRightGroupBox->setLayout(layout);
        }

        void WidgetGallery::createBottomLeftTabWidget()
        {
            bottomLeftTabWidget = new QTabWidget;
            bottomLeftTabWidget->setSizePolicy(QSizePolicy::Preferred,
                                               QSizePolicy::Ignored);

            QWidget *tab1 = new QWidget;
            tableWidget = new QTableWidget(10, 10);

            QHBoxLayout *tab1hbox = new QHBoxLayout;
            tab1hbox->setMargin(5);
            tab1hbox->addWidget(tableWidget);
            tab1->setLayout(tab1hbox);

            QWidget *tab2 = new QWidget;
            textEdit = new QTextEdit;

            textEdit->setPlainText(tr("Au clair de la lune,\n"
                                      "Mon ami Pierrot,\n"
                                      "Prête moi ta plume\n"
                                      "Pour écrire un mot.\n"
                                      "Ma chandelle est morte,\n"
                                      "Je n'ai plus de feu.\n"
                                      "Ouvre moi ta porte,\n"
                                      "Pour l'amour de Dieu.\n"));

            QHBoxLayout *tab2hbox = new QHBoxLayout;
            tab2hbox->setMargin(5);
            tab2hbox->addWidget(textEdit);
            tab2->setLayout(tab2hbox);

            bottomLeftTabWidget->addTab(tab1, tr("&Table"));
            bottomLeftTabWidget->addTab(tab2, tr("Text &Edit"));
        }

        void WidgetGallery::createBottomRightGroupBox()
        {
            bottomRightGroupBox = new QGroupBox(tr("Group 3"));
            bottomRightGroupBox->setCheckable(true);
            bottomRightGroupBox->setChecked(true);

            lineEdit = new QLineEdit("s3cRe7");
            lineEdit->setEchoMode(QLineEdit::Password);

            spinBox = new QSpinBox(bottomRightGroupBox);
            spinBox->setValue(50);

            dateTimeEdit = new QDateTimeEdit(bottomRightGroupBox);
            dateTimeEdit->setDateTime(QDateTime::currentDateTime());

            slider = new QSlider(Qt::Horizontal, bottomRightGroupBox);
            slider->setValue(40);

            scrollBar = new QScrollBar(Qt::Horizontal, bottomRightGroupBox);
            scrollBar->setValue(60);

            dial = new QDial(bottomRightGroupBox);
            dial->setValue(30);
            dial->setNotchesVisible(true);

            QGridLayout *layout = new QGridLayout;
            layout->addWidget(lineEdit, 0, 0, 1, 2);
            layout->addWidget(spinBox, 1, 0, 1, 2);
            layout->addWidget(dateTimeEdit, 2, 0, 1, 2);
            layout->addWidget(slider, 3, 0);
            layout->addWidget(scrollBar, 4, 0);
            layout->addWidget(dial, 3, 1, 2, 1);
            layout->setRowStretch(5, 1);
            bottomRightGroupBox->setLayout(layout);
        }

        void WidgetGallery::createProgressBar()
        {
            progressBar = new QProgressBar;
            progressBar->setRange(0, 10000);
            progressBar->setValue(0);

            QTimer *timer = new QTimer(this);
            connect(timer, SIGNAL(timeout()), this, SLOT(advanceProgressBar()));
            timer->start(1000);
        }