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** This file is part of the examples of the Qt Toolkit.
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#include "myinputpanel.h"

//! [0]

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 *)));
}

//! [0]

bool MyInputPanel::event(QEvent *e)
{
    switch (e->type()) {
//! [1]
    case QEvent::WindowActivate:
        if (lastFocusedWidget)
            lastFocusedWidget->activateWindow();
        break;
//! [1]
    default:
        break;
    }

    return QWidget::event(e);
}

//! [2]

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

//! [2]

//! [3]

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

//! [3]