Qt 5.11 | Qt Widgets | Styles Example | widgetgallery.cpp Example File

Qt 5.11.3 Reference Documentation

# widgetgallery.cpp Example File

widgets/styles/widgetgallery.cpp

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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);
      }