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/*
* checkbox.cpp - check box with read-only option
* Program: kalarm
* Copyright (c) 2002, 2003 by David Jarvie <software@astrojar.org.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "checkbox.moc"
CheckBox::CheckBox(QWidget* parent, const char* name)
: QCheckBox(parent, name),
mFocusPolicy(focusPolicy()),
mFocusWidget(0),
mReadOnly(false)
{ }
CheckBox::CheckBox(const QString& text, QWidget* parent, const char* name)
: QCheckBox(text, parent, name),
mFocusPolicy(focusPolicy()),
mFocusWidget(0),
mReadOnly(false)
{ }
/******************************************************************************
* Set the read-only status. If read-only, the checkbox can be toggled by the
* application, but not by the user.
*/
void CheckBox::setReadOnly(bool ro)
{
if ((int)ro != (int)mReadOnly)
{
mReadOnly = ro;
setFocusPolicy(ro ? QWidget::NoFocus : mFocusPolicy);
if (ro)
clearFocus();
}
}
/******************************************************************************
* Specify a widget to receive focus when the checkbox is clicked on.
*/
void CheckBox::setFocusWidget(QWidget* w, bool enable)
{
mFocusWidget = w;
mFocusWidgetEnable = enable;
if (w)
connect(this, SIGNAL(clicked()), SLOT(slotClicked()));
else
disconnect(this, SIGNAL(clicked()), this, SLOT(slotClicked()));
}
/******************************************************************************
* Called when the checkbox is clicked.
* If it is now checked, focus is transferred to any specified focus widget.
*/
void CheckBox::slotClicked()
{
if (mFocusWidget && isChecked())
{
if (mFocusWidgetEnable)
mFocusWidget->setEnabled(true);
mFocusWidget->setFocus();
}
}
/******************************************************************************
* Event handlers to intercept events if in read-only mode.
* Any events which could change the checkbox state are discarded.
*/
void CheckBox::mousePressEvent(QMouseEvent* e)
{
if (mReadOnly)
{
// Swallow up the event if it's the left button
if (e->button() == Qt::LeftButton)
return;
}
QCheckBox::mousePressEvent(e);
}
void CheckBox::mouseReleaseEvent(QMouseEvent* e)
{
if (mReadOnly)
{
// Swallow up the event if it's the left button
if (e->button() == Qt::LeftButton)
return;
}
QCheckBox::mouseReleaseEvent(e);
}
void CheckBox::mouseMoveEvent(QMouseEvent* e)
{
if (!mReadOnly)
QCheckBox::mouseMoveEvent(e);
}
void CheckBox::keyPressEvent(QKeyEvent* e)
{
if (mReadOnly)
switch (e->key())
{
case Qt::Key_Up:
case Qt::Key_Left:
case Qt::Key_Right:
case Qt::Key_Down:
// Process keys which shift the focus
break;
default:
return;
}
QCheckBox::keyPressEvent(e);
}
void CheckBox::keyReleaseEvent(QKeyEvent* e)
{
if (!mReadOnly)
QCheckBox::keyReleaseEvent(e);
}
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