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/******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2018 Baldur Karlsson
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
#include "CollapseGroupBox.h"
#include <QMouseEvent>
#include <QStyleOptionGroupBox>
#include <QStylePainter>
CollapseGroupBox::CollapseGroupBox(QWidget *parent) : QGroupBox(parent)
{
}
CollapseGroupBox::~CollapseGroupBox()
{
}
void CollapseGroupBox::setMaximumSize(const QSize &size)
{
// if collapsed, silently update the 'original' max height for when we un-collapse. Otherwise
// forward the call
if(m_collapsed)
{
m_prevMaxHeight = size.height();
QGroupBox::setMaximumSize(QSize(size.width(), maximumHeight()));
}
else
{
QGroupBox::setMaximumSize(size);
}
}
void CollapseGroupBox::setMaximumHeight(int maxh)
{
// if collapsed, silently update the 'original' max height for when we un-collapse. Otherwise
// forward the call
if(m_collapsed)
m_prevMaxHeight = maxh;
else
QGroupBox::setMaximumHeight(maxh);
}
void CollapseGroupBox::setCollapsed(bool coll)
{
// redundant call
if(m_collapsed == coll)
return;
// if not collapsed, save the current maximum height so we can restore it again and set the
// 'collapsed' maximum height. If we *are* collapsed, then restore the maximum height
if(m_collapsed)
{
QGroupBox::setMaximumHeight(m_prevMaxHeight);
}
else
{
m_prevMaxHeight = maximumHeight();
QStyleOptionGroupBox option;
initStyleOption(&option);
option.subControls |= QStyle::SC_GroupBoxCheckBox;
QRect contentsRect =
style()->subControlRect(QStyle::CC_GroupBox, &option, QStyle::SC_GroupBoxContents, this);
QGroupBox::setMaximumHeight(height() - contentsRect.height());
}
m_collapsed = coll;
update();
}
void CollapseGroupBox::paintEvent(QPaintEvent *)
{
QStylePainter paint(this);
QStyleOptionGroupBox option;
initStyleOption(&option);
// pretend we have a groupbox so the painting allocates space for it
option.subControls |= QStyle::SC_GroupBoxCheckBox;
paint.drawComplexControl(QStyle::CC_GroupBox, option);
// now paint over the checkbox
QRect checkBoxRect =
style()->subControlRect(QStyle::CC_GroupBox, &option, QStyle::SC_GroupBoxCheckBox, this);
paint.fillRect(checkBoxRect, palette().brush(QPalette::Window));
QStyleOption arrowOpt = option;
arrowOpt.rect = checkBoxRect;
paint.drawPrimitive(m_collapsed ? QStyle::PE_IndicatorArrowRight : QStyle::PE_IndicatorArrowDown,
arrowOpt);
}
void CollapseGroupBox::mouseReleaseEvent(QMouseEvent *event)
{
if(event->button() != Qt::LeftButton)
{
event->ignore();
return;
}
QStyleOptionGroupBox option;
initStyleOption(&option);
// pretend we have a groupbox so we can hit-test for it
option.subControls |= QStyle::SC_GroupBoxCheckBox;
if(style()->hitTestComplexControl(QStyle::CC_GroupBox, &option, event->pos(), this) &
(QStyle::SC_GroupBoxCheckBox | QStyle::SC_GroupBoxLabel))
{
setCollapsed(!m_collapsed);
}
}
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