67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
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#include "CircularReveal.h"
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#include <QGuiApplication>
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#include <QQuickItemGrabResult>
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#include <QPainterPath>
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CircularReveal::CircularReveal(QQuickItem *parent) : QQuickPaintedItem(parent) {
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m_target = nullptr;
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m_radius = 0;
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_anim = new QPropertyAnimation(this, "radius", this);
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_anim->setDuration(333);
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_anim->setEasingCurve(QEasingCurve::OutCubic);
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setVisible(false);
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connect(_anim, &QPropertyAnimation::finished, this, [=]() {
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update();
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setVisible(false);
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Q_EMIT animationFinished();
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});
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connect(this, &CircularReveal::radiusChanged, this, [=]() { update(); });
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}
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void CircularReveal::paint(QPainter *painter) {
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painter->save();
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painter->drawImage(QRect(0, 0, static_cast<int>(width()), static_cast<int>(height())), _source);
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QPainterPath path;
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path.moveTo(_center.x(), _center.y());
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path.addEllipse(QPointF(_center.x(), _center.y()), m_radius, m_radius);
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painter->setCompositionMode(QPainter::CompositionMode_Clear);
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if (m_darkToLight) {
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painter->fillPath(path, Qt::white);
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} else {
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QPainterPath outerRect;
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outerRect.addRect(0, 0, width(), height());
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outerRect = outerRect.subtracted(path);
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painter->fillPath(outerRect, Qt::black);
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}
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painter->restore();
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}
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[[maybe_unused]] void CircularReveal::start(int w, int h, const QPoint ¢er, int radius) {
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if (_anim->state() == QAbstractAnimation::Running) {
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_anim->stop();
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int currentRadius = m_radius;
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_anim->setStartValue(currentRadius);
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_anim->setEndValue(m_darkToLight ? 0 : radius);
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} else {
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if (m_darkToLight) {
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_anim->setStartValue(radius);
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_anim->setEndValue(0);
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} else {
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_anim->setStartValue(0);
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_anim->setEndValue(radius);
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}
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}
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_center = center;
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_grabResult = m_target->grabToImage(QSize(w, h));
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connect(_grabResult.data(), &QQuickItemGrabResult::ready, this,
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&CircularReveal::handleGrabResult);
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}
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void CircularReveal::handleGrabResult() {
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_grabResult.data()->image().swap(_source);
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update();
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setVisible(true);
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Q_EMIT imageChanged();
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_anim->start();
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}
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