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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Design Tooling
**
** 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 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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.
**
****************************************************************************/
#include "handleitem.h"
#include "keyframeitem.h"
#include "utils.h"
#include <QPainter>
namespace DesignTools {
struct HandleGeometry
{
HandleGeometry(const QPointF &pos, const HandleItemStyleOption &style)
{
QPointF topLeft(-style.size / 2.0, -style.size / 2.0);
handle = QRectF(topLeft, -topLeft);
toKeyframe = QLineF(QPointF(0.0, 0.0), -pos);
angle = -toKeyframe.angle() + 45.0;
}
QRectF handle;
QLineF toKeyframe;
double angle;
};
HandleItem::HandleItem(QGraphicsItem *parent)
: SelectableItem(parent)
, m_style()
{
setFlag(QGraphicsItem::ItemStacksBehindParent, true);
}
HandleItem::~HandleItem() {}
int HandleItem::type() const
{
return Type;
}
QRectF HandleItem::boundingRect() const
{
HandleGeometry geom(pos(), m_style);
QTransform transform;
transform.rotate(geom.angle);
QRectF bounds = bbox(geom.handle, transform);
grow(bounds, -pos());
return bounds;
}
void HandleItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
if (locked())
return;
Q_UNUSED(option)
Q_UNUSED(widget)
QColor handleColor(isSelected() ? m_style.selectionColor : m_style.color);
HandleGeometry geom(pos(), m_style);
QPen pen = painter->pen();
pen.setWidthF(m_style.lineWidth);
pen.setColor(handleColor);
painter->save();
painter->setPen(pen);
painter->drawLine(geom.toKeyframe);
painter->rotate(geom.angle);
painter->fillRect(geom.handle, handleColor);
painter->restore();
}
void HandleItem::setStyle(const CurveEditorStyle &style)
{
m_style = style.handleStyle;
}
QVariant HandleItem::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value)
{
if (change == ItemPositionChange) {
if (KeyframeItem *parent = qgraphicsitem_cast<KeyframeItem *>(parentItem())) {
HandleSlot slot = parent->handleSlot(this);
QPointF pos = value.toPointF();
if (slot == HandleSlot::Left) {
if (pos.x() > 0.0)
pos.rx() = 0.0;
} else if (slot == HandleSlot::Right) {
if (pos.x() < 0.0)
pos.rx() = 0.0;
}
return QVariant(pos);
}
}
return QGraphicsItem::itemChange(change, value);
}
} // End namespace DesignTools.
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