Qt 4.8: widgetgallery.cpp Example File (widgets/styles/widgetgallery.cpp)

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# 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
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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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(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);
     }