100 lines
2.2 KiB
C++
100 lines
2.2 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "editor/scene.h"
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#include "editor/scene_item_canvas.h"
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#include "editor/scene_item_line.h"
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#include "ui/rp_widget.h"
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#include <QGraphicsSceneMouseEvent>
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#include <QGraphicsSceneMouseEvent>
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#include <QGraphicsSceneMouseEvent>
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namespace Editor {
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Scene::Scene(const QRectF &rect)
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: QGraphicsScene(rect)
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, _canvas(new ItemCanvas) {
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clearPath();
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addItem(_canvas);
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_canvas->paintRequest(
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) | rpl::start_with_next([=](not_null<QPainter*> p) {
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p->fillRect(sceneRect(), Qt::transparent);
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p->setPen(QPen(_brushData.color, _brushData.size));
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p->drawPath(_path);
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}, _lifetime);
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}
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void Scene::mousePressEvent(QGraphicsSceneMouseEvent *event) {
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QGraphicsScene::mousePressEvent(event);
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if (event->isAccepted() || (event->button() == Qt::RightButton)) {
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return;
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}
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_mousePresses.fire({});
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_path.moveTo(event->scenePos());
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_drawing = true;
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}
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void Scene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
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QGraphicsScene::mouseReleaseEvent(event);
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if (event->isAccepted() || (event->button() == Qt::RightButton)) {
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return;
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}
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_path.lineTo(event->scenePos());
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addLineItem();
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_drawing = false;
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}
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void Scene::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
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QGraphicsScene::mouseMoveEvent(event);
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if (event->isAccepted()
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|| (event->button() == Qt::RightButton)
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|| !_drawing) {
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return;
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}
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const auto scenePos = event->scenePos();
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_path.lineTo(scenePos);
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_path.moveTo(scenePos);
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_canvas->update();
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}
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void Scene::addLineItem() {
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if (_path.capacity() < 3) {
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return;
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}
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addItem(new ItemLine(
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_path,
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sceneRect().size().toSize() * cIntRetinaFactor(),
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_brushData.color,
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_brushData.size));
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_canvas->setZValue(++_lastLineZ);
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clearPath();
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}
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void Scene::applyBrush(const QColor &color, float size) {
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_brushData.color = color;
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_brushData.size = size;
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}
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void Scene::clearPath() {
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_path = QPainterPath();
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_path.setFillRule(Qt::WindingFill);
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}
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rpl::producer<> Scene::mousePresses() const {
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return _mousePresses.events();
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}
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Scene::~Scene() {
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}
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} // namespace Editor
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