#include "onmonitorcornersitem.h"
#include "kdenlivesettings.h"
+#include <algorithm>
+
#include <QGraphicsSceneMouseEvent>
#include <QPainter>
#include <QStyleOptionGraphicsItem>
#include <QCursor>
+#include <QGraphicsView>
-OnMonitorCornersItem::OnMonitorCornersItem(MonitorScene* scene, QGraphicsItem* parent) :
- AbstractOnMonitorItem(scene),
- QGraphicsPolygonItem(parent)
+OnMonitorCornersItem::OnMonitorCornersItem(QGraphicsItem* parent) :
+ QGraphicsPolygonItem(parent)
+ , m_mode(NoAction)
+ , m_selectedCorner(-1)
+ , m_modified(false)
+ , m_view(NULL)
{
setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
framepen.setColor(Qt::yellow);
setPen(framepen);
setBrush(Qt::NoBrush);
+ setAcceptHoverEvents(true);
}
-cornersActions OnMonitorCornersItem::getMode(QPoint pos)
+OnMonitorCornersItem::cornersActions OnMonitorCornersItem::getMode(const QPointF &pos, int *corner)
{
- QPainterPath mouseArea;
- pos = mapFromScene(pos).toPoint();
- mouseArea.addRect(pos.x() - 6, pos.y() - 6, 12, 12);
- if (mouseArea.contains(polygon().at(0)))
- return Corner1;
- else if (mouseArea.contains(polygon().at(1)))
- return Corner2;
- else if (mouseArea.contains(polygon().at(2)))
- return Corner3;
- else if (mouseArea.contains(polygon().at(3)))
- return Corner4;
- else
+ *corner = -1;
+ if (polygon().count() != 4)
return NoAction;
-}
-void OnMonitorCornersItem::slotMousePressed(QGraphicsSceneMouseEvent* event)
-{
- event->accept();
+ QPainterPath mouseArea;
+ qreal size = 12;
+ if (getView())
+ size /= m_view->matrix().m11();
+ mouseArea.addRect(pos.x() - size / 2, pos.y() - size / 2, size, size);
+ for (int i = 0; i < 4; ++i) {
+ if (mouseArea.contains(polygon().at(i))) {
+ *corner = i;
+ return Corner;
+ }
+ }
+ if (KdenliveSettings::onmonitoreffects_cornersshowcontrols()) {
+ if (mouseArea.contains(getCentroid()))
+ return Move;
- if (!isEnabled())
- return;
+ int j;
+ for (int i = 0; i < 4; ++i) {
+ j = (i + 1) % 4;
+ if (mouseArea.contains(QLineF(polygon().at(i), polygon().at(j)).pointAt(.5))) {
+ *corner = i;
+ return MoveSide;
+ }
+ }
+ }
- m_mode = getMode(event->scenePos().toPoint());
+ return NoAction;
}
-void OnMonitorCornersItem::slotMouseMoved(QGraphicsSceneMouseEvent* event)
+void OnMonitorCornersItem::mousePressEvent(QGraphicsSceneMouseEvent* event)
{
- event->accept();
+ m_mode = getMode(event->pos(), &m_selectedCorner);
+ m_lastPoint = event->scenePos();
- if (!isEnabled()) {
- emit requestCursor(QCursor(Qt::ArrowCursor));
- return;
- }
+ if (m_mode == NoAction)
+ event->ignore();
+}
+void OnMonitorCornersItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
+{
/*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
* event->accept();
* return;
}*/
if (event->buttons() & Qt::LeftButton) {
- QPoint mousePos = mapFromScene(event->scenePos()).toPoint();
- QPolygon p = polygon().toPolygon();
+ QPointF mousePos = mapFromScene(event->scenePos());
+ QPolygonF p = polygon();
switch (m_mode) {
- case Corner1:
- p.replace(0, mousePos);
+ case Corner:
+ p.replace(m_selectedCorner, mousePos);
m_modified = true;
break;
- case Corner2:
- p.replace(1, mousePos);
+ case Move:
+ p.translate(mousePos - m_lastPoint);
m_modified = true;
break;
- case Corner3:
- p.replace(2, mousePos);
- m_modified = true;
- break;
- case Corner4:
- p.replace(3, mousePos);
+ case MoveSide:
+ p[m_selectedCorner] += mousePos - m_lastPoint;
+ p[(m_selectedCorner + 1) % 4] += mousePos - m_lastPoint;
m_modified = true;
break;
default:
break;
}
+ m_lastPoint = mousePos;
setPolygon(p);
- } else {
- switch (getMode(event->scenePos().toPoint())) {
- case NoAction:
- emit requestCursor(QCursor(Qt::ArrowCursor));
- break;
- default:
- emit requestCursor(QCursor(Qt::OpenHandCursor));
- break;
+ }
+
+ if (m_modified) {
+ event->accept();
+ if (KdenliveSettings::monitorscene_directupdate()) {
+ emit changed();
+ m_modified = false;
}
+ } else {
+ event->ignore();
}
- if (m_modified && KdenliveSettings::monitorscene_directupdate()) {
- emit actionFinished();
+}
+
+void OnMonitorCornersItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
+{
+ if (m_modified) {
m_modified = false;
+ emit changed();
+ }
+ event->accept();
+}
+
+void OnMonitorCornersItem::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
+{
+ int corner;
+ switch (getMode(event->pos(), &corner)) {
+ case NoAction:
+ unsetCursor();
+ break;
+ case Move:
+ setCursor(QCursor(Qt::SizeAllCursor));
+ break;
+ default:
+ setCursor(QCursor(Qt::OpenHandCursor));
+ break;
}
}
void OnMonitorCornersItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
+ painter->setPen(QPen(Qt::yellow, 1, Qt::SolidLine));
+
if (KdenliveSettings::onmonitoreffects_cornersshowlines())
QGraphicsPolygonItem::paint(painter, option, widget);
+ if (polygon().count() != 4)
+ return;
+
+ double baseSize = 1 / painter->worldTransform().m11();
painter->setRenderHint(QPainter::Antialiasing);
- painter->setBrush(QBrush(Qt::yellow));
- double handleSize = 4 / painter->matrix().m11();
- painter->drawEllipse(polygon().at(0), handleSize, handleSize);
- painter->drawEllipse(polygon().at(1), handleSize, handleSize);
- painter->drawEllipse(polygon().at(2), handleSize, handleSize);
- painter->drawEllipse(polygon().at(3), handleSize, handleSize);
+ painter->setBrush(QBrush(isEnabled() ? Qt::yellow : Qt::red));
+ double handleSize = 4 * baseSize;
+ for (int i = 0; i < 4; ++i)
+ painter->drawEllipse(polygon().at(i), handleSize, handleSize);
+
+ if (KdenliveSettings::onmonitoreffects_cornersshowcontrols() && isEnabled()) {
+ painter->setPen(QPen(Qt::red, 2, Qt::SolidLine));
+ double toolSize = 6 * baseSize;
+ // move tool
+ QPointF c = getCentroid();
+ painter->drawLine(QLineF(c - QPointF(toolSize, toolSize), c + QPointF(toolSize, toolSize)));
+ painter->drawLine(QLineF(c - QPointF(-toolSize, toolSize), c + QPointF(-toolSize, toolSize)));
+
+ // move side tools (2 corners at once)
+ int j;
+ for (int i = 0; i < 4; ++i) {
+ j = (i + 1) % 4;
+ QPointF m = QLineF(polygon().at(i), polygon().at(j)).pointAt(.5);
+ painter->drawRect(QRectF(-toolSize / 2., -toolSize / 2., toolSize, toolSize).translated(m));
+ }
+ }
+}
+
+QPointF OnMonitorCornersItem::getCentroid()
+{
+ QList <QPointF> p = sortedClockwise();
+
+ /*
+ * See: http://local.wasp.uwa.edu.au/~pbourke/geometry/polyarea/
+ */
+
+ double A = 0;
+ int i, j;
+ for (i = 0; i < 4; ++i) {
+ j = (i + 1) % 4;
+ A += p[j].x() * p[i].y() - p[i].x() * p[j].y();
+ }
+ A /= 2.;
+ A = qAbs(A);
+
+ double x = 0, y = 0, f;
+ for (i = 0; i < 4; ++i) {
+ j = (i + 1) % 4;
+ f = (p[i].x() * p[j].y() - p[j].x() * p[i].y());
+ x += f * (p[i].x() + p[j].x());
+ y += f * (p[i].y() + p[j].y());
+ }
+ x /= 6*A;
+ y /= 6*A;
+ return QPointF(x, y);
+}
+
+QList <QPointF> OnMonitorCornersItem::sortedClockwise()
+{
+ QList <QPointF> points = polygon().toList();
+ QPointF& a = points[0];
+ QPointF& b = points[1];
+ QPointF& c = points[2];
+ QPointF& d = points[3];
+
+ /*
+ * http://stackoverflow.com/questions/242404/sort-four-points-in-clockwise-order
+ */
+
+ double abc = a.x() * b.y() - a.y() * b.x() + b.x() * c.y() - b.y() * c.x() + c.x() * a.y() - c.y() * a.x();
+ if (abc > 0) {
+ double acd = a.x() * c.y() - a.y() * c.x() + c.x() * d.y() - c.y() * d.x() + d.x() * a.y() - d.y() * a.x();
+ if (acd > 0) {
+ ;
+ } else {
+ double abd = a.x() * b.y() - a.y() * b.x() + b.x() * d.y() - b.y() * d.x() + d.x() * a.y() - d.y() * a.x();
+ if (abd > 0) {
+ std::swap(d, c);
+ } else{
+ std::swap(a, d);
+ }
+ }
+ } else {
+ double acd = a.x() * c.y() - a.y() * c.x() + c.x() * d.y() - c.y() * d.x() + d.x() * a.y() - d.y() * a.x();
+ if (acd > 0) {
+ double abd = a.x() * b.y() - a.y() * b.x() + b.x() * d.y() - b.y() * d.x() + d.x() * a.y() - d.y() * a.x();
+ if (abd > 0) {
+ std::swap(b, c);
+ } else {
+ std::swap(a, b);
+ }
+ } else {
+ std::swap(a, c);
+ }
+ }
+ return points;
+}
+
+bool OnMonitorCornersItem::getView()
+{
+ if (m_view)
+ return true;
+
+ if (scene() && !scene()->views().isEmpty()) {
+ m_view = scene()->views().first();
+ return true;
+ } else {
+ return false;
+ }
}
#include "onmonitorcornersitem.moc"
projects / kdenlive / blobdiff