diff options
Diffstat (limited to 'src/corelib/doc/snippets/events/events.cpp')
-rw-r--r-- | src/corelib/doc/snippets/events/events.cpp | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/corelib/doc/snippets/events/events.cpp b/src/corelib/doc/snippets/events/events.cpp new file mode 100644 index 0000000000..a3a95d6935 --- /dev/null +++ b/src/corelib/doc/snippets/events/events.cpp @@ -0,0 +1,97 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the documentation 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 <QCheckBox> +#include <QMouseEvent> + +class MyCheckBox : public QCheckBox +{ +public: + void mousePressEvent(QMouseEvent *event); +}; + +//! [0] +void MyCheckBox::mousePressEvent(QMouseEvent *event) +{ + if (event->button() == Qt::LeftButton) { + // handle left mouse button here + } else { + // pass on other buttons to base class + QCheckBox::mousePressEvent(event); + } +} +//! [0] + +class MyWidget : public QWidget +{ +public: + bool event(QEvent *event); +}; + +static const int MyCustomEventType = 1099; + +class MyCustomEvent : public QEvent +{ +public: + MyCustomEvent() : QEvent((QEvent::Type)MyCustomEventType) {} +}; + +//! [1] +bool MyWidget::event(QEvent *event) +{ + if (event->type() == QEvent::KeyPress) { + QKeyEvent *ke = static_cast<QKeyEvent *>(event); + if (ke->key() == Qt::Key_Tab) { + // special tab handling here + return true; + } + } else if (event->type() == MyCustomEventType) { + MyCustomEvent *myEvent = static_cast<MyCustomEvent *>(event); + // custom event handling here + return true; + } + + return QWidget::event(event); +} +//! [1] + +int main() +{ +} |