78 lines
1.6 KiB
C++
78 lines
1.6 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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#pragma once
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#include "ui/rp_widget.h"
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namespace Ui {
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class ResizeArea : public RpWidget {
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public:
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ResizeArea(QWidget *parent) : RpWidget(parent) {
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setCursor(style::cur_sizehor);
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}
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rpl::producer<int> moveLeft() const {
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return _moveLeft.events();
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}
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template <typename Callback>
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void addMoveLeftCallback(Callback &&callback) {
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moveLeft(
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) | rpl::start_with_next(
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std::forward<Callback>(callback),
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lifetime());
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}
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rpl::producer<> moveFinished() const {
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return _moveFinished.events();
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}
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template <typename Callback>
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void addMoveFinishedCallback(Callback &&callback) {
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moveFinished(
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) | rpl::start_with_next(
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std::forward<Callback>(callback),
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lifetime());
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}
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~ResizeArea() {
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moveFinish();
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}
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protected:
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void mousePressEvent(QMouseEvent *e) override {
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if (e->button() == Qt::LeftButton) {
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_moving = true;
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_moveStartLeft = e->pos().x();
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}
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}
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void mouseReleaseEvent(QMouseEvent *e) override {
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if (e->button() == Qt::LeftButton) {
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moveFinish();
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}
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}
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void mouseMoveEvent(QMouseEvent *e) override {
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if (_moving) {
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_moveLeft.fire(e->globalPos().x() - _moveStartLeft);
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}
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}
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private:
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void moveFinish() {
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if (base::take(_moving)) {
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_moveFinished.fire({});
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}
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}
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rpl::event_stream<int> _moveLeft;
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rpl::event_stream<> _moveFinished;
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int _moveStartLeft = 0;
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bool _moving = false;
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};
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} // namespace Ui
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