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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "valueaxislabel_p.h"
#include <QtCore/qlocale.h>
#include <QtGui/qevent.h>
#include <QtGui/qtextcursor.h>
#include <QtGui/qtextdocument.h>
QT_CHARTS_BEGIN_NAMESPACE
ValueAxisLabel::ValueAxisLabel(QGraphicsItem *parent) :
QGraphicsTextItem(parent)
{
}
void ValueAxisLabel::focusInEvent(QFocusEvent *event)
{
m_htmlBeforeEdit = toHtml();
setTextWidth(-1);
m_valueBeforeEdit = m_value;
setHtml(QString::number(m_value));
m_editing = true;
QGraphicsTextItem::focusInEvent(event);
}
void ValueAxisLabel::focusOutEvent(QFocusEvent *event)
{
// perform the modifications before emitting valueChanged
// because slots attached to valueChanged can trigger
// a range change which might invalidate the current label
QGraphicsTextItem::focusOutEvent(event);
setTextInteractionFlags(Qt::NoTextInteraction);
m_editing = false;
bool ok = false;
QLocale locale;
qreal oldValue = m_value;
qreal newValue = locale.toDouble(document()->toPlainText(), &ok);
if (ok && newValue != m_value) {
m_value = newValue;
emit valueChanged(oldValue, newValue);
} else {
document()->setHtml(m_htmlBeforeEdit);
}
}
qreal ValueAxisLabel::value() const
{
return m_value;
}
void ValueAxisLabel::setValue(const qreal &value)
{
setTextInteractionFlags(Qt::NoTextInteraction);
clearFocus();
m_value = value;
}
void ValueAxisLabel::reloadBeforeEditContent()
{
m_value = m_valueBeforeEdit;
setHtml(m_htmlBeforeEdit);
}
QRectF ValueAxisLabel::boundingRect() const
{
QRectF ret = QGraphicsTextItem::boundingRect();
// add 2px margin to allow the cursor to
// show up properly when editing
if (m_editing)
ret.setWidth(ret.width() + 2);
return ret;
}
void ValueAxisLabel::setEditable(bool editable)
{
m_editable = editable;
}
void ValueAxisLabel::keyPressEvent(QKeyEvent *event)
{
if (event->text().length() >= 1) {
// finish editing with enter
if (event->key() == Qt::Key_Enter ||
event->key() == Qt::Key_Return) {
clearFocus();
// prevent further event processing with a return
// because the focusOutEvent could have triggered
// a range change which might have invalidated the current label
return;
} else if (event->key() == Qt::Key_Escape) {
document()->setHtml(m_htmlBeforeEdit);
clearFocus();
// prevent further event processing with a return
// because the focusOutEvent could have triggered
// a range change which might have invalidated the current label
return;
}
QLocale locale;
if (!event->text().at(0).isDigit()
&& event->text().at(0) != locale.decimalPoint()
&& event->text().at(0) != locale.negativeSign()
&& event->text().at(0) != locale.exponential()
&& event->key() != Qt::Key_Backspace
&& event->key() != Qt::Key_Delete) {
event->ignore();
return;
}
}
QGraphicsTextItem::keyPressEvent(event);
}
bool ValueAxisLabel::sceneEvent(QEvent *event)
{
if (m_editable && event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
setTextInteractionFlags(Qt::TextEditorInteraction);
bool ret = QGraphicsTextItem::sceneEvent(event);
// QGraphicsTextItem::sceneevent needs to be processed before
// the focus and text selection
setFocus(Qt::MouseFocusReason);
QTextCursor cursor = textCursor();
cursor.select(QTextCursor::Document);
setTextCursor(cursor);
return ret;
}
return QGraphicsTextItem::sceneEvent(event);
}
QT_CHARTS_END_NAMESPACE
#include "moc_valueaxislabel_p.cpp"
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