Qt 4.8: testwidget.cpp Example File (widgets/elidedlabel/testwidget.cpp)

Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# testwidget.cpp Example File

widgets/elidedlabel/testwidget.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the QtCore module 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 Digia Plc and its Subsidiary(-ies) 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
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

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

     #include <QLabel>
     #include <QPushButton>
     #include <QSizePolicy>
     #include <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);

     #ifdef Q_WS_MAEMO_5
         setAttribute(Qt::WA_Maemo5AutoOrientation, true);
     #endif
     }

     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);
     }