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// Copyright (C) 2018 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 "timelineitem.h"
#include "timelineconstants.h"
#include "timelinegraphicsscene.h"
#include "timelineicons.h"
#include "timelinesectionitem.h"
#include "timelineutils.h"
#include "timelinewidget.h"
#include <theme.h>
#include <coreplugin/icore.h>
#include <QApplication>
#include <QCursor>
#include <QGraphicsView>
#include <QPainter>
#include <QPainterPath>
#include <cmath>
namespace QmlDesigner {
TimelineItem::TimelineItem(TimelineItem *parent)
: QGraphicsWidget(parent)
{}
TimelineGraphicsScene *TimelineItem::timelineScene() const
{
return qobject_cast<TimelineGraphicsScene *>(scene());
}
TimelineFrameHandle::TimelineFrameHandle(TimelineItem *parent)
: TimelineMovableAbstractItem(parent)
{
static const QColor color = Theme::getColor(Theme::IconsWarningToolBarColor);
setBrush(color);
setPen(color);
setRect(0, 0, TimelineConstants::rulerHeight, TimelineConstants::rulerHeight);
setZValue(40);
setCursor(Qt::ClosedHandCursor);
m_timer.setSingleShot(true);
m_timer.setInterval(15);
QObject::connect(&m_timer, &QTimer::timeout, [this]() {
if (QApplication::mouseButtons() == Qt::LeftButton)
scrollOutOfBounds();
});
}
void TimelineFrameHandle::setHeight(int height)
{
setRect(rect().x(), rect().y(), rect().width(), height);
}
void TimelineFrameHandle::setPosition(qreal frame)
{
const qreal scenePos = mapFromFrameToScene(frame);
QRectF newRect(scenePos - rect().width() / 2, rect().y(), rect().width(), rect().height());
if (!qFuzzyCompare(newRect.x(), rect().x())) {
setRect(newRect);
}
m_position = frame;
}
void TimelineFrameHandle::setPositionInteractive(const QPointF &position)
{
const double width = abstractScrollGraphicsScene()->width();
if (position.x() > width) {
callSetClampedXPosition(width - (rect().width() / 2) - 1);
m_timer.start();
} else if (position.x() < TimelineConstants::sectionWidth) {
callSetClampedXPosition(TimelineConstants::sectionWidth);
m_timer.start();
} else {
callSetClampedXPosition(position.x() - rect().width() / 2);
const qreal frame = std::round(mapFromSceneToFrame(rect().center().x()));
timelineGraphicsScene()->commitCurrentFrame(frame);
}
}
void TimelineFrameHandle::commitPosition(const QPointF &point)
{
setPositionInteractive(point);
}
void TimelineItem::drawLine(QPainter *painter, qreal x1, qreal y1, qreal x2, qreal y2)
{
painter->drawLine(QPointF(x1 + 0.5, y1 + 0.5), QPointF(x2 + 0.5, y2 + 0.5));
}
qreal TimelineFrameHandle::position() const
{
return m_position;
}
TimelineFrameHandle *TimelineFrameHandle::asTimelineFrameHandle()
{
return this;
}
TimelineGraphicsScene *TimelineFrameHandle::timelineGraphicsScene() const
{
return qobject_cast<TimelineGraphicsScene* >(abstractScrollGraphicsScene());
}
void TimelineFrameHandle::scrollOffsetChanged()
{
setPosition(position());
}
QPainterPath TimelineFrameHandle::shape() const
{
QPainterPath path;
QRectF rect = boundingRect();
rect.setHeight(TimelineConstants::sectionHeight);
rect.adjust(-4, 0, 4, 0);
path.addEllipse(rect);
return path;
}
static int devicePixelWidth(const QPixmap &pixmap)
{
return pixmap.width() / pixmap.devicePixelRatioF();
}
static int devicePixelHeight(const QPixmap &pixmap)
{
return pixmap.height() / pixmap.devicePixelRatioF();
}
void TimelineFrameHandle::paint(QPainter *painter,
const QStyleOptionGraphicsItem * /*option*/,
QWidget * /*widget*/)
{
static const QPixmap playHead = TimelineIcons::PLAYHEAD.pixmap();
static const int pixmapHeight = devicePixelHeight(playHead);
static const int pixmapWidth = devicePixelWidth(playHead);
if (rect().x() < TimelineConstants::sectionWidth - rect().width() / 2)
return;
painter->save();
painter->setOpacity(0.8);
const qreal center = rect().width() / 2 + rect().x();
painter->setPen(pen());
auto offsetTop = pixmapHeight - 7;
TimelineItem::drawLine(painter, center, offsetTop, center, rect().height() - 1);
const QPointF pmTopLeft(center - pixmapWidth / 2, -4.);
painter->drawPixmap(pmTopLeft, playHead);
painter->restore();
}
QPointF TimelineFrameHandle::mapFromGlobal(const QPoint &pos) const
{
for (auto *view : abstractScrollGraphicsScene()->views()) {
if (view->objectName() == "SceneView") {
auto graphicsViewCoords = view->mapFromGlobal(pos);
auto sceneCoords = view->mapToScene(graphicsViewCoords);
return sceneCoords;
}
}
return {};
}
int TimelineFrameHandle::computeScrollSpeed() const
{
const double mouse = mapFromGlobal(QCursor::pos()).x();
const double width = abstractScrollGraphicsScene()->width();
const double acc = mouse > width ? mouse - width
: double(TimelineConstants::sectionWidth) - mouse;
const double delta = TimelineUtils::clamp<double>(acc, 0., 200.);
const double blend = TimelineUtils::reverseLerp(delta, 0., 200.);
const double factor = TimelineUtils::lerp<double>(blend, 5, 20);
if (mouse > width)
return scrollOffset() + std::round(factor);
else
return scrollOffset() - std::round(factor);
return 0;
}
void TimelineFrameHandle::callSetClampedXPosition(double x)
{
const int minimumWidth = TimelineConstants::sectionWidth + TimelineConstants::timelineLeftOffset
- rect().width() / 2;
const int maximumWidth = minimumWidth
+ abstractScrollGraphicsScene()->rulerDuration() * abstractScrollGraphicsScene()->rulerScaling()
- scrollOffset();
setClampedXPosition(x, minimumWidth, maximumWidth);
}
// Auto scroll when dragging playhead out of bounds.
void TimelineFrameHandle::scrollOutOfBounds()
{
const double width = abstractScrollGraphicsScene()->width();
const double mouse = mapFromGlobal(QCursor::pos()).x();
if (mouse > width)
scrollOutOfBoundsMax();
else if (mouse < TimelineConstants::sectionWidth)
scrollOutOfBoundsMin();
}
void TimelineFrameHandle::scrollOutOfBoundsMax()
{
const double width = abstractScrollGraphicsScene()->width();
if (QApplication::mouseButtons() == Qt::LeftButton) {
abstractScrollGraphicsScene()->setScrollOffset(computeScrollSpeed());
abstractScrollGraphicsScene()->invalidateScrollbar();
callSetClampedXPosition(width - (rect().width() / 2) - 1);
m_timer.start();
} else {
// Mouse release
callSetClampedXPosition(width - (rect().width() / 2) - 1);
const int frame = std::floor(mapFromSceneToFrame(rect().center().x()));
const int ef = abstractScrollGraphicsScene()->endFrame();
timelineGraphicsScene()->commitCurrentFrame(frame <= ef ? frame : ef);
}
}
void TimelineFrameHandle::scrollOutOfBoundsMin()
{
if (QApplication::mouseButtons() == Qt::LeftButton) {
auto offset = computeScrollSpeed();
if (offset >= 0)
abstractScrollGraphicsScene()->setScrollOffset(offset);
else
abstractScrollGraphicsScene()->setScrollOffset(0);
abstractScrollGraphicsScene()->invalidateScrollbar();
callSetClampedXPosition(TimelineConstants::sectionWidth);
m_timer.start();
} else {
// Mouse release
callSetClampedXPosition(TimelineConstants::sectionWidth);
int frame = mapFromSceneToFrame(rect().center().x());
const int sframe = abstractScrollGraphicsScene()->startFrame();
if (frame != sframe) {
const qreal framePos = mapFromFrameToScene(frame);
if (framePos
<= (TimelineConstants::sectionWidth + TimelineConstants::timelineLeftOffset))
frame++;
}
timelineGraphicsScene()->commitCurrentFrame(frame >= sframe ? frame : sframe);
}
}
} // namespace QmlDesigner
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