mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-23 20:10:48 +08:00
356 lines
10 KiB
C++
356 lines
10 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "arthurwidgets.h"
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#include "hoverpoints.h"
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#include <algorithm>
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#if QT_CONFIG(opengl)
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#include <QtOpenGL/QOpenGLWindow>
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#endif
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HoverPoints::HoverPoints(QWidget *widget, PointShape shape)
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: QObject(widget),
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m_widget(widget),
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m_shape(shape)
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{
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widget->installEventFilter(this);
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widget->setAttribute(Qt::WA_AcceptTouchEvents);
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connect(this, &HoverPoints::pointsChanged,
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m_widget, QOverload<>::of(&QWidget::update));
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}
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void HoverPoints::setEnabled(bool enabled)
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{
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if (m_enabled != enabled) {
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m_enabled = enabled;
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m_widget->update();
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}
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}
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bool HoverPoints::eventFilter(QObject *object, QEvent *event)
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{
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if (object != m_widget || !m_enabled)
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return false;
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switch (event->type()) {
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case QEvent::MouseButtonPress:
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{
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if (!m_fingerPointMapping.isEmpty())
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return true;
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auto *me = static_cast<const QMouseEvent *>(event);
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QPointF clickPos = me->position().toPoint();
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qsizetype index = -1;
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for (qsizetype i = 0; i < m_points.size(); ++i) {
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QPainterPath path;
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const QRectF rect = pointBoundingRect(m_points.at(i));
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if (m_shape == CircleShape)
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path.addEllipse(rect);
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else
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path.addRect(rect);
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if (path.contains(clickPos)) {
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index = i;
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break;
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}
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}
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if (me->button() == Qt::LeftButton) {
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if (index == -1) {
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if (!m_editable)
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return false;
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qsizetype pos = 0;
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// Insert sort for x or y
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switch (m_sortType) {
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case XSort:
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for (qsizetype i = 0; i < m_points.size(); ++i) {
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if (m_points.at(i).x() > clickPos.x()) {
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pos = i;
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break;
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}
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}
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break;
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case YSort:
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for (qsizetype i = 0; i < m_points.size(); ++i) {
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if (m_points.at(i).y() > clickPos.y()) {
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pos = i;
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break;
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}
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}
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break;
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default:
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break;
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}
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m_points.insert(pos, clickPos);
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m_locks.insert(pos, 0);
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m_currentIndex = pos;
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firePointChange();
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} else {
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m_currentIndex = index;
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}
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return true;
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} else if (me->button() == Qt::RightButton) {
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if (index >= 0 && m_editable) {
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if (m_locks[index] == 0) {
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m_locks.remove(index);
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m_points.remove(index);
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}
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firePointChange();
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return true;
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}
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}
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}
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break;
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case QEvent::MouseButtonRelease:
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if (!m_fingerPointMapping.isEmpty())
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return true;
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m_currentIndex = -1;
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break;
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case QEvent::MouseMove:
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if (!m_fingerPointMapping.isEmpty())
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return true;
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if (m_currentIndex >= 0) {
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auto *me = static_cast<const QMouseEvent *>(event);
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movePoint(m_currentIndex, me->position().toPoint());
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}
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break;
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case QEvent::TouchBegin:
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case QEvent::TouchUpdate:
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{
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auto *touchEvent = static_cast<const QTouchEvent*>(event);
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const auto points = touchEvent->points();
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const qreal pointSize = qMax(m_pointSize.width(), m_pointSize.height());
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for (const auto &point : points) {
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const int id = point.id();
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switch (point.state()) {
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case QEventPoint::Pressed:
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{
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// find the point, move it
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const auto mappedPoints = m_fingerPointMapping.values();
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QSet<qsizetype> activePoints(mappedPoints.begin(), mappedPoints.end());
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qsizetype activePoint = -1;
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qreal distance = -1;
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const qsizetype pointsCount = m_points.size();
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const qsizetype activePointCount = activePoints.size();
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if (pointsCount == 2 && activePointCount == 1) { // only two points
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activePoint = activePoints.contains(0) ? 1 : 0;
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} else {
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for (qsizetype i = 0; i < pointsCount; ++i) {
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if (activePoints.contains(i))
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continue;
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qreal d = QLineF(point.position(), m_points.at(i)).length();
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if ((distance < 0 && d < 12 * pointSize) || d < distance) {
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distance = d;
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activePoint = i;
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}
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}
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}
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if (activePoint != -1) {
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m_fingerPointMapping.insert(point.id(), activePoint);
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movePoint(activePoint, point.position());
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}
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}
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break;
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case QEventPoint::Released:
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{
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// move the point and release
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const auto it = m_fingerPointMapping.constFind(id);
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movePoint(it.value(), point.position());
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m_fingerPointMapping.erase(it);
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}
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break;
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case QEventPoint::Updated:
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{
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// move the point
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const qsizetype pointIdx = m_fingerPointMapping.value(id, -1);
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if (pointIdx >= 0) // do we track this point?
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movePoint(pointIdx, point.position());
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}
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break;
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default:
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break;
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}
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}
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if (m_fingerPointMapping.isEmpty()) {
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event->ignore();
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return false;
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}
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return true;
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}
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case QEvent::TouchEnd:
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if (m_fingerPointMapping.isEmpty()) {
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event->ignore();
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return false;
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}
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return true;
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case QEvent::Resize:
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{
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auto *e = static_cast<const QResizeEvent *>(event);
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if (e->oldSize().width() <= 0 || e->oldSize().height() <= 0)
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break;
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qreal stretch_x = e->size().width() / qreal(e->oldSize().width());
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qreal stretch_y = e->size().height() / qreal(e->oldSize().height());
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for (qsizetype i = 0; i < m_points.size(); ++i) {
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QPointF p = m_points.at(i);
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movePoint(i, QPointF(p.x() * stretch_x, p.y() * stretch_y), false);
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}
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firePointChange();
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break;
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}
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case QEvent::Paint:
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{
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QWidget *that_widget = m_widget;
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m_widget = nullptr;
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QCoreApplication::sendEvent(object, event);
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m_widget = that_widget;
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paintPoints();
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return true;
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}
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default:
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break;
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}
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return false;
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}
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void HoverPoints::paintPoints()
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{
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QPainter p;
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#if QT_CONFIG(opengl)
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ArthurFrame *af = qobject_cast<ArthurFrame *>(m_widget);
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if (af && af->usesOpenGL() && af->glWindow()->isValid()) {
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af->glWindow()->makeCurrent();
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p.begin(af->glWindow());
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} else {
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p.begin(m_widget);
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}
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#else
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p.begin(m_widget);
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#endif
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p.setRenderHint(QPainter::Antialiasing);
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if (m_connectionPen.style() != Qt::NoPen && m_connectionType != NoConnection) {
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p.setPen(m_connectionPen);
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if (m_connectionType == CurveConnection) {
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QPainterPath path;
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path.moveTo(m_points.at(0));
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for (qsizetype i = 1; i < m_points.size(); ++i) {
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QPointF p1 = m_points.at(i - 1);
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QPointF p2 = m_points.at(i);
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qreal distance = p2.x() - p1.x();
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path.cubicTo(p1.x() + distance / 2, p1.y(),
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p1.x() + distance / 2, p2.y(),
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p2.x(), p2.y());
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}
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p.drawPath(path);
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} else {
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p.drawPolyline(m_points);
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}
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}
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p.setPen(m_pointPen);
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p.setBrush(m_pointBrush);
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for (const auto &point : std::as_const(m_points)) {
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QRectF bounds = pointBoundingRect(point);
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if (m_shape == CircleShape)
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p.drawEllipse(bounds);
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else
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p.drawRect(bounds);
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}
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}
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static QPointF bound_point(const QPointF &point, const QRectF &bounds, int lock)
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{
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QPointF p = point;
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qreal left = bounds.left();
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qreal right = bounds.right();
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qreal top = bounds.top();
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qreal bottom = bounds.bottom();
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if (p.x() < left || (lock & HoverPoints::LockToLeft)) p.setX(left);
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else if (p.x() > right || (lock & HoverPoints::LockToRight)) p.setX(right);
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if (p.y() < top || (lock & HoverPoints::LockToTop)) p.setY(top);
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else if (p.y() > bottom || (lock & HoverPoints::LockToBottom)) p.setY(bottom);
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return p;
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}
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void HoverPoints::setPoints(const QPolygonF &points)
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{
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if (points.size() != m_points.size())
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m_fingerPointMapping.clear();
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m_points.clear();
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for (qsizetype i = 0; i < points.size(); ++i)
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m_points << bound_point(points.at(i), boundingRect(), 0);
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m_locks.clear();
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if (m_points.size() > 0) {
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m_locks.resize(m_points.size());
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m_locks.fill(0);
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}
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}
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void HoverPoints::movePoint(qsizetype index, const QPointF &point, bool emitUpdate)
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{
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m_points[index] = bound_point(point, boundingRect(), m_locks.at(index));
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if (emitUpdate)
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firePointChange();
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}
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inline static bool x_less_than(const QPointF &p1, const QPointF &p2)
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{
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return p1.x() < p2.x();
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}
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inline static bool y_less_than(const QPointF &p1, const QPointF &p2)
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{
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return p1.y() < p2.y();
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}
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void HoverPoints::firePointChange()
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{
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if (m_sortType != NoSort) {
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QPointF oldCurrent;
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if (m_currentIndex != -1)
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oldCurrent = m_points[m_currentIndex];
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if (m_sortType == XSort)
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std::sort(m_points.begin(), m_points.end(), x_less_than);
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else if (m_sortType == YSort)
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std::sort(m_points.begin(), m_points.end(), y_less_than);
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// Compensate for changed order...
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if (m_currentIndex != -1) {
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for (qsizetype i = 0; i < m_points.size(); ++i) {
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if (m_points[i] == oldCurrent) {
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m_currentIndex = i;
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break;
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}
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}
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}
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}
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emit pointsChanged(m_points);
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}
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