c207743338
Now base::lambda can be copied and can wrap any immutable lambda. For mutable lambdas there is base::lambda_once (which you're supposed to call only once to pass data through lambda captures, for example by using std::unique_ptr). Generally base::lambda is passed by value and base::lambda_once is passed by rvalue reference.
116 lines
2.7 KiB
C++
116 lines
2.7 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) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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#include "ui/twidget.h"
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namespace Ui {
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class AbstractButton : public TWidget {
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Q_OBJECT
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public:
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AbstractButton(QWidget *parent) : TWidget(parent) {
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setMouseTracking(true);
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}
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Qt::KeyboardModifiers clickModifiers() const {
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return _modifiers;
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}
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void setDisabled(bool disabled = true);
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void clearState();
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bool isOver() const {
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return _state & StateFlag::Over;
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}
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bool isDown() const {
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return _state & StateFlag::Down;
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}
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bool isDisabled() {
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return _state & StateFlag::Disabled;
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}
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void setPointerCursor(bool enablePointerCursor);
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void setAcceptBoth(bool acceptBoth = true);
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void setClickedCallback(base::lambda<void()> callback) {
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_clickedCallback = std::move(callback);
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}
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void setVisible(bool visible) override {
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TWidget::setVisible(visible);
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if (!visible) {
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clearState();
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}
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}
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protected:
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void enterEventHook(QEvent *e) override;
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void leaveEventHook(QEvent *e) override;
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void mousePressEvent(QMouseEvent *e) override;
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void mouseMoveEvent(QMouseEvent *e) override;
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void mouseReleaseEvent(QMouseEvent *e) override;
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signals:
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void clicked();
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protected:
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enum class StateFlag {
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None = 0x00,
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Over = 0x01,
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Down = 0x02,
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Disabled = 0x04,
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};
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Q_DECLARE_FLAGS(State, StateFlag);
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Q_DECLARE_FRIEND_OPERATORS_FOR_FLAGS(State);
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State state() const {
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return _state;
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}
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enum class StateChangeSource {
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ByUser = 0x00,
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ByPress = 0x01,
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ByHover = 0x02,
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};
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void setOver(bool over, StateChangeSource source = StateChangeSource::ByUser);
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virtual void onStateChanged(State was, StateChangeSource source) {
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}
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private:
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void updateCursor();
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void checkIfOver(QPoint localPos);
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State _state = StateFlag::None;
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bool _acceptBoth = false;
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Qt::KeyboardModifiers _modifiers;
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bool _enablePointerCursor = true;
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base::lambda<void()> _clickedCallback;
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};
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Q_DECLARE_OPERATORS_FOR_FLAGS(AbstractButton::State);
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} // namespace Ui
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