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/***************************************************************************
* Copyright (C) 2012 by Peter Penz <[email protected]> *
* *
* 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 "kitemlistroleeditor.h"
#include <KDebug>
#include <QKeyEvent>
KItemListRoleEditor::KItemListRoleEditor(QWidget *parent) :
KTextEdit(parent),
m_index(0),
m_role(),
m_blockFinishedSignal(false),
m_eventHandlingLevel(0),
m_deleteAfterEventHandling(false)
{
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setAcceptRichText(false);
document()->setDocumentMargin(0);
if (parent) {
parent->installEventFilter(this);
}
connect(this, SIGNAL(textChanged()), this, SLOT(autoAdjustSize()));
}
KItemListRoleEditor::~KItemListRoleEditor()
{
}
void KItemListRoleEditor::setIndex(int index)
{
m_index = index;
}
int KItemListRoleEditor::index() const
{
return m_index;
}
void KItemListRoleEditor::setRole(const QByteArray& role)
{
m_role = role;
}
QByteArray KItemListRoleEditor::role() const
{
return m_role;
}
void KItemListRoleEditor::deleteWhenIdle()
{
if (m_eventHandlingLevel > 0) {
// We are handling an event at the moment. It could be that we
// are in a nested event loop run by contextMenuEvent() or a
// call of mousePressEvent() which results in drag&drop.
// -> do not call deleteLater() to prevent a crash when we
// return from the nested event loop.
m_deleteAfterEventHandling = true;
} else {
deleteLater();
}
}
bool KItemListRoleEditor::eventFilter(QObject* watched, QEvent* event)
{
if (watched == parentWidget() && event->type() == QEvent::Resize) {
emitRoleEditingFinished();
}
return KTextEdit::eventFilter(watched, event);
}
bool KItemListRoleEditor::event(QEvent* event)
{
++m_eventHandlingLevel;
if (event->type() == QEvent::FocusOut) {
QFocusEvent* focusEvent = static_cast<QFocusEvent*>(event);
if (focusEvent->reason() != Qt::PopupFocusReason) {
emitRoleEditingFinished();
}
}
const int result = KTextEdit::event(event);
--m_eventHandlingLevel;
if (m_deleteAfterEventHandling && m_eventHandlingLevel == 0) {
// Schedule this object for deletion and make sure that we do not try
// to deleteLater() again when the DeferredDelete event is received.
deleteLater();
m_deleteAfterEventHandling = false;
}
return result;
}
bool KItemListRoleEditor::viewportEvent(QEvent* event)
{
++m_eventHandlingLevel;
const bool result = KTextEdit::viewportEvent(event);
--m_eventHandlingLevel;
if (m_deleteAfterEventHandling && m_eventHandlingLevel == 0) {
// Schedule this object for deletion and make sure that we do not try
// to deleteLater() again when the DeferredDelete event is received.
deleteLater();
m_deleteAfterEventHandling = false;
}
return result;
}
void KItemListRoleEditor::keyPressEvent(QKeyEvent* event)
{
switch (event->key()) {
case Qt::Key_Escape:
// Emitting the signal roleEditingCanceled might result
// in losing the focus. Per default losing the focus emits
// a roleEditingFinished signal (see KItemListRoleEditor::event),
// which is not wanted in this case.
m_blockFinishedSignal = true;
emit roleEditingCanceled(m_index, m_role, toPlainText());
m_blockFinishedSignal = false;
event->accept();
return;
case Qt::Key_Enter:
case Qt::Key_Return:
// TODO: find a better way to fix the bug 309760
clearFocus(); // emitRoleEditingFinished(); results in a crash
event->accept();
return;
default:
break;
}
KTextEdit::keyPressEvent(event);
}
void KItemListRoleEditor::autoAdjustSize()
{
const qreal frameBorder = 2 * frameWidth();
const qreal requiredWidth = document()->size().width();
const qreal availableWidth = size().width() - frameBorder;
if (requiredWidth > availableWidth) {
qreal newWidth = requiredWidth + frameBorder;
if (parentWidget() && pos().x() + newWidth > parentWidget()->width()) {
newWidth = parentWidget()->width() - pos().x();
}
resize(newWidth, size().height());
}
const qreal requiredHeight = document()->size().height();
const qreal availableHeight = size().height() - frameBorder;
if (requiredHeight > availableHeight) {
qreal newHeight = requiredHeight + frameBorder;
if (parentWidget() && pos().y() + newHeight > parentWidget()->height()) {
newHeight = parentWidget()->height() - pos().y();
}
resize(size().width(), newHeight);
}
}
void KItemListRoleEditor::emitRoleEditingFinished()
{
if (!m_blockFinishedSignal) {
emit roleEditingFinished(m_index, m_role, toPlainText());
}
}
#include "kitemlistroleeditor.moc"
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