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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 "curveitem.h"
#include "animationcurve.h"
#include "keyframeitem.h"
#include "utils.h"
#include <QPainter>
#include <QPainterPath>
namespace DesignTools {
CurveItem::CurveItem(QGraphicsItem *parent)
: QGraphicsObject(parent)
, m_id(0)
, m_style()
, m_transform()
, m_keyframes()
, m_selected(false)
, m_preselected(false)
, m_itemDirty(true)
, m_pathDirty(true)
{}
CurveItem::CurveItem(unsigned int id, const AnimationCurve &curve, QGraphicsItem *parent)
: QGraphicsObject(parent)
, m_id(id)
, m_style()
, m_transform()
, m_keyframes()
, m_selected(false)
, m_preselected(false)
, m_itemDirty(true)
, m_pathDirty(true)
{
setAcceptHoverEvents(true);
auto emitCurveChanged = [this]() {
m_itemDirty = true;
m_pathDirty = true;
update();
};
for (auto frame : curve.keyframes()) {
auto *item = new KeyframeItem(frame, this);
connect(item, &KeyframeItem::keyframeChanged, emitCurveChanged);
m_keyframes.push_back(item);
}
}
CurveItem::~CurveItem() {}
int CurveItem::type() const
{
return Type;
}
QRectF CurveItem::boundingRect() const
{
auto bbox = [](QRectF &bounds, const Keyframe &frame) {
grow(bounds, frame.position());
grow(bounds, frame.leftHandle());
grow(bounds, frame.rightHandle());
};
QRectF bounds;
for (auto *item : m_keyframes)
bbox(bounds, item->keyframe());
return m_transform.mapRect(bounds);
}
bool CurveItem::contains(const QPointF &point) const
{
bool valid = false;
QPointF transformed(m_transform.inverted(&valid).map(point));
double width = abs(20.0 / scaleY(m_transform));
if (valid)
return curve().intersects(transformed, width);
return false;
}
void CurveItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
if (m_keyframes.size() > 1) {
QPen pen = painter->pen();
pen.setWidthF(m_style.width);
pen.setColor(m_selected ? m_style.selectionColor : (m_preselected ? Qt::red : m_style.color));
painter->save();
painter->setPen(pen);
painter->drawPath(path());
// Tmp. Remove later.
painter->setPen(Qt::red);
for (auto p : curve().extrema())
painter->drawEllipse(m_transform.map(p), 6., 6.);
painter->restore();
}
}
bool CurveItem::isDirty() const
{
return m_itemDirty;
}
unsigned int CurveItem::id() const
{
return m_id;
}
AnimationCurve CurveItem::curve() const
{
std::vector<Keyframe> out;
out.reserve(m_keyframes.size());
for (auto item : m_keyframes)
out.push_back(item->keyframe());
return out;
}
void CurveItem::setDirty(bool dirty)
{
m_itemDirty = dirty;
}
QRectF CurveItem::setComponentTransform(const QTransform &transform)
{
m_pathDirty = true;
prepareGeometryChange();
m_transform = transform;
for (auto frame : m_keyframes)
frame->setComponentTransform(transform);
return boundingRect();
}
void CurveItem::setStyle(const CurveEditorStyle &style)
{
m_style = style.curveStyle;
for (auto *frame : m_keyframes)
frame->setStyle(style);
}
QPainterPath CurveItem::path() const
{
if (m_pathDirty) {
Keyframe previous = m_keyframes.front()->keyframe();
Keyframe current;
m_path = QPainterPath(m_transform.map(previous.position()));
for (size_t i = 1; i < m_keyframes.size(); ++i) {
current = m_keyframes[i]->keyframe();
if (previous.rightHandle().isNull() || current.leftHandle().isNull()) {
m_path.lineTo(m_transform.map(current.position()));
} else {
m_path.cubicTo(
m_transform.map(previous.rightHandle()),
m_transform.map(current.leftHandle()),
m_transform.map(current.position()));
}
previous = current;
}
m_pathDirty = false;
}
return m_path;
}
void CurveItem::setSelected(bool select)
{
if (select != m_selected) {
m_selected = select;
update();
}
}
void CurveItem::setPreSelected(bool preSelect)
{
if (preSelect != m_preselected) {
m_preselected = preSelect;
update();
}
}
} // End namespace DesignTools.
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