testwidget.cpp Example File | Qt Widgets 5.12.8

- Qt 5.12
- Qt Widgets
- Elided Label Example
- testwidget.cpp Example File
- Qt 5.12.8 Reference Documentation

# testwidget.cpp Example File

widgets/elidedlabel/testwidget.cpp

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     #include "testwidget.h"
     #include "elidedlabel.h"

     #include <QtWidgets/QLabel>
     #include <QtWidgets/QPushButton>
     #include <QtWidgets/QSizePolicy>
     #include <QtWidgets/QGridLayout>

     TestWidget::TestWidget(QWidget *parent):
         QWidget(parent)
     {
         const QString romeo = tr(
             "But soft, what light through yonder window breaks? / "
             "It is the east, and Juliet is the sun. / "
             "Arise, fair sun, and kill the envious moon, / "
             "Who is already sick and pale with grief / "
             "That thou, her maid, art far more fair than she."
         );

         const QString macbeth = tr(
             "To-morrow, and to-morrow, and to-morrow, / "
             "Creeps in this petty pace from day to day, / "
             "To the last syllable of recorded time; / "
             "And all our yesterdays have lighted fools / "
             "The way to dusty death. Out, out, brief candle! / "
             "Life's but a walking shadow, a poor player, / "
             "That struts and frets his hour upon the stage, / "
             "And then is heard no more. It is a tale / "
             "Told by an idiot, full of sound and fury, / "
             "Signifying nothing."
         );

         const QString harry = tr("Feeling lucky, punk?");

         textSamples << romeo << macbeth << harry;

         sampleIndex = 0;
         elidedText = new ElidedLabel(textSamples[sampleIndex], this);
         elidedText->setFrameStyle(QFrame::Box);

         QPushButton *switchButton = new QPushButton(tr("Switch text"));
         connect(switchButton, &QPushButton::clicked, this, &TestWidget::switchText);

         QPushButton *exitButton = new QPushButton(tr("Exit"));
         connect(exitButton, &QPushButton::clicked, this, &TestWidget::close);

         QLabel *label = new QLabel(tr("Elided"));
         label->setVisible(elidedText->isElided());
         connect(elidedText, &ElidedLabel::elisionChanged, label, &QLabel::setVisible);

         widthSlider = new QSlider(Qt::Horizontal);
         widthSlider->setMinimum(0);
         connect(widthSlider, &QSlider::valueChanged, this, &TestWidget::onWidthChanged);

         heightSlider = new QSlider(Qt::Vertical);
         heightSlider->setInvertedAppearance(true);
         heightSlider->setMinimum(0);
         connect(heightSlider, &QSlider::valueChanged, this, &TestWidget::onHeightChanged);

         QGridLayout *layout = new QGridLayout();
         layout->addWidget(label, 0, 1, Qt::AlignCenter);
         layout->addWidget(switchButton, 0, 2);
         layout->addWidget(exitButton, 0, 3);
         layout->addWidget(widthSlider, 1, 1, 1, 3);
         layout->addWidget(heightSlider, 2, 0);
         layout->addWidget(elidedText, 2, 1, 1, 3, Qt::AlignTop | Qt::AlignLeft);

         setLayout(layout);
     }

     void TestWidget::resizeEvent(QResizeEvent *event)
     {
         Q_UNUSED(event)

         int maxWidth = widthSlider->width();
         widthSlider->setMaximum(maxWidth);
         widthSlider->setValue(maxWidth / 2);

         int maxHeight = heightSlider->height();
         heightSlider->setMaximum(maxHeight);
         heightSlider->setValue(maxHeight / 2);

         elidedText->setFixedSize(widthSlider->value(), heightSlider->value());
     }

     void TestWidget::switchText()
     {
         sampleIndex = (sampleIndex + 1) % textSamples.size();
         elidedText->setText(textSamples.at(sampleIndex));
     }

     void TestWidget::onWidthChanged(int width)
     {
         elidedText->setFixedWidth(width);
     }

     void TestWidget::onHeightChanged(int height)
     {
         elidedText->setFixedHeight(height);
     }