- Qt 5.5
- Qt Widgets
- Styles Example
- widgetgallery.cpp Example File
- Qt 5.5.1 Reference Documentation

# widgetgallery.cpp Example File

widgets/styles/widgetgallery.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
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    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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    #include <QtWidgets>

    #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(QString)),
                this, SLOT(changeStyle(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("Twinkle, twinkle, little star,\n"
                                  "How I wonder what you are.\n"
                                  "Up above the world so high,\n"
                                  "Like a diamond in the sky.\n"
                                  "Twinkle, twinkle, little star,\n"
                                  "How I wonder what you are!\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);
    }