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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "playhead.h"
#include "curveeditormodel.h"
#include "graphicsview.h"
#include <QApplication>
#include <QGraphicsScene>
#include <QPainter>
#include <QPainterPath>
#include <cmath>
namespace QmlDesigner {
constexpr double g_playheadMargin = 5.0;
Playhead::Playhead(GraphicsView *view)
: m_frame(0)
, m_moving(false)
, m_rect()
, m_timer()
{
m_timer.setSingleShot(true);
m_timer.setInterval(30);
QObject::connect(&m_timer, &QTimer::timeout, view, [this, view]() {
if (QApplication::mouseButtons() == Qt::LeftButton)
mouseMoveOutOfBounds(view);
});
}
int Playhead::currentFrame() const
{
return m_frame;
}
void Playhead::setMoving(bool moving)
{
m_moving = moving;
}
void Playhead::moveToFrame(int frame, GraphicsView *view)
{
m_frame = frame;
m_rect.moveCenter(QPointF(view->mapTimeToX(m_frame), m_rect.center().y()));
}
void Playhead::resize(GraphicsView *view)
{
QRectF viewRect = view->mapToScene(view->viewport()->rect()).boundingRect();
CurveEditorStyle style = view->editorStyle();
QPointF tlr(style.valueAxisWidth, style.timeAxisHeight - style.playhead.width);
QPointF brr(style.valueAxisWidth + style.playhead.width, -g_playheadMargin);
QPointF tl = viewRect.topLeft() + tlr;
QPointF br = viewRect.bottomLeft() + brr;
m_rect = QRectF(tl, br);
moveToFrame(m_frame, view);
}
bool Playhead::mousePress(const QPointF &pos)
{
QRectF hitRect = m_rect;
hitRect.setBottom(hitRect.top() + hitRect.width());
m_moving = hitRect.contains(pos);
return m_moving;
}
bool Playhead::mouseMove(const QPointF &pos, GraphicsView *view)
{
if (m_moving) {
CurveEditorStyle style = view->editorStyle();
QRectF canvas = view->canvasRect().adjusted(0.0, -style.timeAxisHeight, 0.0, 0.0);
if (canvas.contains(pos)) {
int frame = std::round(view->mapXtoTime(pos.x()));
view->setCurrentFrame(frame);
} else if (!m_timer.isActive())
m_timer.start();
}
return m_moving;
}
void Playhead::mouseMoveOutOfBounds(GraphicsView *view)
{
if (QApplication::mouseButtons() != Qt::LeftButton)
return;
CurveEditorStyle style = view->editorStyle();
QRectF canvas = view->canvasRect();
QPointF pos = view->globalToScene(QCursor::pos());
if (pos.x() > canvas.right()) {
double speed = (pos.x() - canvas.right());
double nextCenter = m_rect.center().x() + speed;
double frame = std::round(view->mapXtoTime(nextCenter));
view->setCurrentFrame(frame);
double framePosition = view->mapTimeToX(frame);
double rightSideOut = framePosition + style.playhead.width / 2.0 + style.canvasMargin;
double overshoot = rightSideOut - canvas.right();
view->scrollContent(overshoot, 0.0);
} else if (pos.x() < canvas.left()) {
double speed = (canvas.left() - pos.x());
double nextCenter = m_rect.center().x() - speed;
double frame = std::round(view->mapXtoTime(nextCenter));
view->setCurrentFrame(frame);
double framePosition = view->mapTimeToX(frame);
double leftSideOut = framePosition - style.playhead.width / 2.0 - style.canvasMargin;
double undershoot = canvas.left() - leftSideOut;
view->scrollContent(-undershoot, 0.0);
}
m_timer.start();
}
void Playhead::mouseRelease([[maybe_unused]] GraphicsView *view)
{
m_moving = false;
}
void Playhead::paint(QPainter *painter, GraphicsView *view) const
{
CurveEditorStyle style = view->editorStyle();
painter->save();
painter->setPen(style.playhead.color);
painter->setRenderHint(QPainter::Antialiasing, true);
QRectF rect = m_rect;
rect.setBottom(m_rect.top() + m_rect.width());
QPointF top(rect.center().x(), rect.top());
QPointF right(rect.right(), rect.top());
QPointF bottom(rect.center().x(), rect.bottom());
QPointF left(rect.left(), rect.top());
QLineF rightToBottom(right, bottom);
rightToBottom.setLength(style.playhead.radius);
QLineF leftToBottom(left, bottom);
leftToBottom.setLength(style.playhead.radius);
QPainterPath path(top);
path.lineTo(right - QPointF(style.playhead.radius, 0.));
path.quadTo(right, rightToBottom.p2());
path.lineTo(bottom);
path.lineTo(leftToBottom.p2());
path.quadTo(left, left + QPointF(style.playhead.radius, 0.));
path.closeSubpath();
painter->fillPath(path, style.playhead.color);
painter->drawLine(top + QPointF(0., 5.), QPointF(m_rect.center().x(), m_rect.bottom()));
painter->restore();
}
} // End namespace QmlDesigner.
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