Qt 4.8: myinputpanel.cpp Example File (tools/inputpanel/myinputpanel.cpp)

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# myinputpanel.cpp Example File

tools/inputpanel/myinputpanel.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples 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 The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     **
     ** 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,
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     ****************************************************************************/

     #include "myinputpanel.h"

     MyInputPanel::MyInputPanel()
         : QWidget(0, Qt::Tool | Qt::WindowStaysOnTopHint),
           lastFocusedWidget(0)
     {
         form.setupUi(this);

         connect(qApp, SIGNAL(focusChanged(QWidget*,QWidget*)),
                 this, SLOT(saveFocusWidget(QWidget*,QWidget*)));

         signalMapper.setMapping(form.panelButton_1, form.panelButton_1);
         signalMapper.setMapping(form.panelButton_2, form.panelButton_2);
         signalMapper.setMapping(form.panelButton_3, form.panelButton_3);
         signalMapper.setMapping(form.panelButton_4, form.panelButton_4);
         signalMapper.setMapping(form.panelButton_5, form.panelButton_5);
         signalMapper.setMapping(form.panelButton_6, form.panelButton_6);
         signalMapper.setMapping(form.panelButton_7, form.panelButton_7);
         signalMapper.setMapping(form.panelButton_8, form.panelButton_8);
         signalMapper.setMapping(form.panelButton_9, form.panelButton_9);
         signalMapper.setMapping(form.panelButton_star, form.panelButton_star);
         signalMapper.setMapping(form.panelButton_0, form.panelButton_0);
         signalMapper.setMapping(form.panelButton_hash, form.panelButton_hash);

         connect(form.panelButton_1, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_2, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_3, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_4, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_5, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_6, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_7, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_8, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_9, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_star, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_0, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));
         connect(form.panelButton_hash, SIGNAL(clicked()),
                 &signalMapper, SLOT(map()));

         connect(&signalMapper, SIGNAL(mapped(QWidget*)),
                 this, SLOT(buttonClicked(QWidget*)));
     }

     bool MyInputPanel::event(QEvent *e)
     {
         switch (e->type()) {
         case QEvent::WindowActivate:
             if (lastFocusedWidget)
                 lastFocusedWidget->activateWindow();
             break;
         default:
             break;
         }

         return QWidget::event(e);
     }

     void MyInputPanel::saveFocusWidget(QWidget * /*oldFocus*/, QWidget *newFocus)
     {
         if (newFocus != 0 && !this->isAncestorOf(newFocus)) {
             lastFocusedWidget = newFocus;
         }
     }

     void MyInputPanel::buttonClicked(QWidget *w)
     {
         QChar chr = qvariant_cast<QChar>(w->property("buttonValue"));
         emit characterGenerated(chr);
     }