143 lines
4 KiB
C++
143 lines
4 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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#include "ui/abstract_button.h"
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#include <rpl/filter.h>
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#include <rpl/mappers.h>
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namespace Ui {
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AbstractButton::AbstractButton(QWidget *parent) : RpWidget(parent) {
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setMouseTracking(true);
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using namespace rpl::mappers;
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shownValue()
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| rpl::filter($1 == false)
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| rpl::start_with_next([this] { clearState(); }, lifetime());
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}
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void AbstractButton::leaveEventHook(QEvent *e) {
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if (_state & StateFlag::Down) return;
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setOver(false, StateChangeSource::ByHover);
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return TWidget::leaveEventHook(e);
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}
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void AbstractButton::enterEventHook(QEvent *e) {
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checkIfOver(mapFromGlobal(QCursor::pos()));
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return TWidget::enterEventHook(e);
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}
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void AbstractButton::setAcceptBoth(bool acceptBoth) {
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_acceptBoth = acceptBoth;
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}
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void AbstractButton::checkIfOver(QPoint localPos) {
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auto over = rect().marginsRemoved(getMargins()).contains(localPos);
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setOver(over, StateChangeSource::ByHover);
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}
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void AbstractButton::mousePressEvent(QMouseEvent *e) {
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checkIfOver(e->pos());
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if (_acceptBoth || (e->buttons() & Qt::LeftButton)) {
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if ((_state & StateFlag::Over) && !(_state & StateFlag::Down)) {
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auto was = _state;
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_state |= StateFlag::Down;
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onStateChanged(was, StateChangeSource::ByPress);
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e->accept();
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}
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}
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}
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void AbstractButton::mouseMoveEvent(QMouseEvent *e) {
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if (rect().marginsRemoved(getMargins()).contains(e->pos())) {
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setOver(true, StateChangeSource::ByHover);
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} else {
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setOver(false, StateChangeSource::ByHover);
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}
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}
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void AbstractButton::mouseReleaseEvent(QMouseEvent *e) {
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if (_state & StateFlag::Down) {
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auto was = _state;
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_state &= ~State(StateFlag::Down);
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onStateChanged(was, StateChangeSource::ByPress);
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if (was & StateFlag::Over) {
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_modifiers = e->modifiers();
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auto test = weak(this);
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if (_clickedCallback) {
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_clickedCallback();
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} else {
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emit clicked();
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}
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if (test) {
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_clicks.fire({});
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}
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} else {
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setOver(false, StateChangeSource::ByHover);
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}
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}
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}
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void AbstractButton::setPointerCursor(bool enablePointerCursor) {
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if (_enablePointerCursor != enablePointerCursor) {
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_enablePointerCursor = enablePointerCursor;
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updateCursor();
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}
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}
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void AbstractButton::setOver(bool over, StateChangeSource source) {
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if (over && !(_state & StateFlag::Over)) {
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auto was = _state;
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_state |= StateFlag::Over;
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onStateChanged(was, source);
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} else if (!over && (_state & StateFlag::Over)) {
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auto was = _state;
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_state &= ~State(StateFlag::Over);
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onStateChanged(was, source);
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}
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updateCursor();
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}
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void AbstractButton::updateCursor() {
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auto pointerCursor = _enablePointerCursor && (_state & StateFlag::Over);
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setCursor(pointerCursor ? style::cur_pointer : style::cur_default);
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}
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void AbstractButton::setDisabled(bool disabled) {
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auto was = _state;
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if (disabled && !(_state & StateFlag::Disabled)) {
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_state |= StateFlag::Disabled;
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onStateChanged(was, StateChangeSource::ByUser);
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} else if (!disabled && (_state & StateFlag::Disabled)) {
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_state &= ~State(StateFlag::Disabled);
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onStateChanged(was, StateChangeSource::ByUser);
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}
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}
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void AbstractButton::clearState() {
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auto was = _state;
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_state = StateFlag::None;
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onStateChanged(was, StateChangeSource::ByUser);
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}
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} // namespace Ui
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