testwidget.cpp Example File

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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, SIGNAL(clicked(bool)), this, SLOT(switchText()));

      QPushButton *exitButton = new QPushButton(tr("Exit"));
      connect(exitButton, SIGNAL(clicked(bool)), this, SLOT(close()));

      QLabel *label = new QLabel(tr("Elided"));
      label->setVisible(elidedText->isElided());
      connect(elidedText, SIGNAL(elisionChanged(bool)), label, SLOT(setVisible(bool)));

      widthSlider = new QSlider(Qt::Horizontal);
      widthSlider->setMinimum(0);
      connect(widthSlider, SIGNAL(valueChanged(int)), this, SLOT(onWidthChanged(int)));

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

      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);
  }