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/*
* Cantata
*
* Copyright (c) 2011-2022 Craig Drummond <craig.p.drummond@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 "thinsplitterhandle.h"
#include "support/utils.h"
#include <QPainter>
#include <QResizeEvent>
ThinSplitterHandle::ThinSplitterHandle(Qt::Orientation orientation, QSplitter* parent)
: QSplitterHandle(orientation, parent), highlightUnderMouse(false), underMouse(false)
{
sz = Utils::scaleForDpi(4);
updateMask();
setAttribute(Qt::WA_MouseNoMask, true);
}
void ThinSplitterHandle::resizeEvent(QResizeEvent* event)
{
updateMask();
if (event->size() != size()) {
QSplitterHandle::resizeEvent(event);
}
}
void ThinSplitterHandle::paintEvent(QPaintEvent* event)
{
if (underMouse) {
QColor col(palette().highlight().color());
QPainter p(this);
int width = Utils::scaleForDpi(2);
QRect r = event->rect();
r = QRect(r.x() + ((r.width() - width) / 2), r.y(), width, r.height());
col.setAlphaF(0.5);
p.fillRect(r, col);
col.setAlphaF(0.1);
p.fillRect(r.adjusted(-(width / 2), 0, width / 2, 0), col);
}
}
bool ThinSplitterHandle::event(QEvent* event)
{
if (highlightUnderMouse) {
switch (event->type()) {
case QEvent::Enter:
case QEvent::HoverEnter:
underMouse = true;
update();
break;
case QEvent::ContextMenu:
case QEvent::Leave:
case QEvent::HoverLeave:
underMouse = false;
update();
break;
default:
break;
}
}
return QWidget::event(event);
}
void ThinSplitterHandle::updateMask()
{
if (Qt::Horizontal == orientation()) {
setContentsMargins(sz, 0, sz, 0);
setMask(QRegion(contentsRect().adjusted(-sz, 0, sz, 0)));
}
else {
setContentsMargins(0, sz, 0, sz);
setMask(QRegion(contentsRect().adjusted(0, -sz, 0, sz)));
}
}
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