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/***************************************************************************
* Copyright (C) 2010-2011 by Daniel Nicoletti *
* dantti12@gmail.com *
* *
* 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; see the file COPYING. If not, write to *
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
* Boston, MA 02110-1301, USA. *
***************************************************************************/
#include "CheckableHeader.h"
#include <QPainter>
#include <QApplication>
#include <QMouseEvent>
#include <QLoggingCategory>
#define UNIVERSAL_PADDING 3
CheckableHeader::CheckableHeader(Qt::Orientation orientation, QWidget *parent)
: QHeaderView(orientation, parent),
m_state(Qt::Unchecked),
m_visible(true)
{
}
void CheckableHeader::paintSection(QPainter *painter, const QRect &rect, int logicalIndex) const
{
const QStyle *style = QApplication::style();
painter->save();
QHeaderView::paintSection(painter, rect, logicalIndex);
painter->restore();
if (logicalIndex == 0 && m_visible) {
QStyleOptionButton option;
option.state = QStyle::State_None;
option.rect = rect;
if (QApplication::isRightToLeft()) {
option.rect.setRight(rect.right() - UNIVERSAL_PADDING);
} else {
option.rect.setLeft(rect.left() + UNIVERSAL_PADDING);
}
option.rect.setLeft(rect.left() + UNIVERSAL_PADDING);
switch (m_state) {
case Qt::Unchecked :
option.state |= QStyle::State_Off;
break;
case Qt::PartiallyChecked :
option.state |= QStyle::State_NoChange;
break;
case Qt::Checked :
option.state |= QStyle::State_On;
break;
}
// Get the cursor position to check if it has focus
QPoint pos = mapFromGlobal(QCursor::pos());
QRect rect = style->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
if (insideCheckBox(rect, pos)) {
option.state |= QStyle::State_HasFocus;
}
// draw item data as CheckBox
painter->save();
style->drawControl(QStyle::CE_CheckBox, &option, painter);
painter->restore();
}
}
bool CheckableHeader::insideCheckBox(const QRect &rect, const QPoint &pos) const
{
// kDebug() << rect << pos;
if ((pos.x() >= rect.x() && (pos.x() <= rect.x() + rect.width())) &&
(pos.y() >= rect.y() && (pos.y() <= rect.y() + rect.height()))) {
return true;
}
return false;
}
QSize CheckableHeader::sizeHint() const
{
const QStyle *style = QApplication::style();
QStyleOptionButton option;
QRect rect = style->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
QSize size = QHeaderView::sizeHint();
// kDebug() << size << rect;
if (size.height() < (rect.height() + 2 * UNIVERSAL_PADDING)) {
size.setHeight(rect.height() + 2 * UNIVERSAL_PADDING);
}
return size;
}
QSize CheckableHeader::sectionSizeFromContents(int logicalIndex) const
{
QSize size = QHeaderView::sectionSizeFromContents(logicalIndex);
if (logicalIndex == 0) {
const QStyle *style = QApplication::style();
QStyleOptionButton option;
QRect rect = style->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
QString text = model()->headerData(0, Qt::Horizontal).toString();
QFontMetrics metric = QFontMetrics(QFont());
int textSize = metric.width(text);
int minimunSize = textSize + 2 * (rect.width() + 2 * (UNIVERSAL_PADDING + 1));
if (size.width() < minimunSize) {
size.setWidth(minimunSize);
}
}
return size;
}
void CheckableHeader::mouseMoveEvent(QMouseEvent *event)
{
headerDataChanged(Qt::Horizontal, 0, 0);
QHeaderView::mouseMoveEvent(event);
}
void CheckableHeader::leaveEvent(QEvent *event)
{
headerDataChanged(Qt::Horizontal, 0, 0);
QHeaderView::leaveEvent(event);
// kDebug();
}
void CheckableHeader::mousePressEvent(QMouseEvent *event)
{
if (!m_visible) {
return;
}
const QStyle *style = QApplication::style();
QStyleOptionButton option;
option.rect.setSize(sizeHint());
option.rect.setWidth(viewport()->width());
QRect rect = style->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
QPoint pos = mapFromGlobal(QCursor::pos());
// kDebug() << rect << pos;
if (insideCheckBox(rect, pos)) {
if (m_state == Qt::Checked) {
m_state = Qt::Unchecked;
} else {
m_state = Qt::Checked;
}
emit toggled(m_state);
headerDataChanged(Qt::Horizontal, 0, 0);
} else {
QHeaderView::mousePressEvent(event);
}
}
void CheckableHeader::setCheckState(Qt::CheckState state)
{
m_state = state;
}
void CheckableHeader::setCheckBoxVisible(bool visible)
{
m_visible = visible;
headerDataChanged(Qt::Horizontal, 0, 0);
}
#include "moc_CheckableHeader.cpp"
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