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#include "CurveEditor.h"
#include "Let.hpp"
#include <QMouseEvent>
using namespace WTS;
CurveEditor::CurveEditor(QWidget *parent)
: TimeLineWidget(parent)
, m_nodePixelSize(8)
, m_curve(0)
, m_dragItem(0)
, m_ignoreReload(false)
{
m_curve = scene()->addPath(QPainterPath(), QPen(Qt::red));
}
void CurveEditor::setCurve(const QPainterPath& curve)
{
Q_ASSERT(m_curve);
m_curve->setPath(curve);
int cnt = m_curve->path().elementCount();
foreach(QGraphicsItem * child, m_curve->childItems()) {
delete child;
}
for(int i = 0; i<cnt; ++i) {
const QPainterPath::Element& elt = m_curve->path().elementAt(i);
QGraphicsRectItem * node = new QGraphicsRectItem(m_curve);
node->setBrush(QBrush(QColor(255,100,100,127)));
node->setData(0, i); // save element index into node
node->setPos(elt.x, elt.y);
}
scaleNodes();
}
void CurveEditor::resizeEvent(QResizeEvent * event)
{
TimeLineWidget::resizeEvent(event);
scaleNodes();
}
void CurveEditor::mousePressEvent(QMouseEvent *event)
{
if (event->buttons() & Qt::LeftButton) {
m_dragLastP = mapToScene(event->pos());
m_dragItem = dynamic_cast<QGraphicsRectItem *>(itemAt( event->pos() ));
}
TimeLineWidget::mousePressEvent(event);
}
void CurveEditor::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
if (m_dragItem) {
emit dataChanged();
m_dragItem = 0;
}
}
TimeLineWidget::mouseReleaseEvent(event);
}
void CurveEditor::mouseMoveEvent(QMouseEvent *event)
{
if (event->buttons() & Qt::LeftButton) {
if (m_dragItem) {
QPointF newPos = mapToScene(event->pos());
float level = std::min(1.0, std::max(0.0, newPos.y()));
newPos.setY(level);
QPointF d = newPos - m_dragLastP;
m_dragLastP = newPos;
m_dragItem->moveBy(0, d.y());
QPainterPath path = m_curve->path();
int nodeIndex = m_dragItem->data(0).toInt();
path.setElementPositionAt(nodeIndex,
m_dragItem->pos().x(),
m_dragItem->pos().y());
m_curve->setPath(path);
Let<bool> sentinel(m_ignoreReload, true);
m_project->setMarkerTension( nodeIndex, level );
}
}
TimeLineWidget::mouseMoveEvent(event);
}
void CurveEditor::setProject(Project *project)
{
TimeLineWidget::setProject(project);
connect(project,SIGNAL(tensionChanged()),SLOT(reloadFromProject()));
}
void CurveEditor::reloadFromProject()
{
if (!m_ignoreReload)
setCurve(project()->tensionCurve( sceneRect().width() ));
}
void CurveEditor::scaleNodes()
{
if (m_curve) {
foreach(QGraphicsItem * child, m_curve->childItems()) {
QGraphicsRectItem * node = dynamic_cast<QGraphicsRectItem *>(child);
if (!node)
continue;
QPointF size2(m_nodePixelSize / 2.0 / width(),
m_nodePixelSize / 2.0 / height() );
node->setRect( QRectF(- size2, size2) );
}
}
}
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