115 lines
3 KiB
C++
115 lines
3 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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namespace Ui {
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class ContinuousSlider : public TWidget {
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public:
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ContinuousSlider(QWidget *parent);
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enum class Direction {
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Horizontal,
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Vertical,
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};
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void setDirection(Direction direction) {
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_direction = direction;
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update();
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}
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float64 value() const;
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void setValue(float64 value, bool animated);
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void setFadeOpacity(float64 opacity);
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void setDisabled(bool disabled);
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bool isDisabled() const {
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return _disabled;
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}
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using Callback = base::lambda_unique<void(float64)>;
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void setChangeProgressCallback(Callback &&callback) {
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_changeProgressCallback = std_::move(callback);
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}
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void setChangeFinishedCallback(Callback &&callback) {
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_changeFinishedCallback = std_::move(callback);
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}
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bool isChanging() const {
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return _mouseDown;
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}
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void setMoveByWheel(bool moveByWheel);
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protected:
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void mouseMoveEvent(QMouseEvent *e) override;
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void mousePressEvent(QMouseEvent *e) override;
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void mouseReleaseEvent(QMouseEvent *e) override;
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void wheelEvent(QWheelEvent *e) override;
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void enterEvent(QEvent *e) override;
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void leaveEvent(QEvent *e) override;
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float64 fadeOpacity() const {
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return _fadeOpacity;
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}
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float64 getCurrentValue(uint64 ms) {
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_a_value.step(ms);
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return _mouseDown ? _downValue : a_value.current();
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}
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float64 getCurrentOverFactor(uint64 ms) {
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return _disabled ? 0. : _a_over.current(ms, _over ? 1. : 0.);
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}
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Direction getDirection() const {
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return _direction;
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}
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bool isHorizontal() const {
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return (_direction == Direction::Horizontal);
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}
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private:
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virtual QRect getSeekRect() const = 0;
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virtual float64 getOverDuration() const = 0;
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void step_value(float64 ms, bool timer);
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void setOver(bool over);
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float64 computeValue(const QPoint &pos) const;
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void updateDownValueFromPos(const QPoint &pos);
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Direction _direction = Direction::Horizontal;
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bool _disabled = false;
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bool _moveByWheel = false;
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std_::unique_ptr<SingleTimer> _byWheelFinished;
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Callback _changeProgressCallback;
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Callback _changeFinishedCallback;
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bool _over = false;
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FloatAnimation _a_over;
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anim::fvalue a_value = { 0., 0. };
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Animation _a_value;
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bool _mouseDown = false;
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float64 _downValue = 0.;
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float64 _fadeOpacity = 1.;
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};
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} // namespace Ui
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