tdesktop/Telegram/SourceFiles/ui/abstract_button.cpp

144 lines
4.0 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "ui/abstract_button.h"
#include <rpl/filter.h>
#include <rpl/mappers.h>
namespace Ui {
AbstractButton::AbstractButton(QWidget *parent) : RpWidget(parent) {
setMouseTracking(true);
using namespace rpl::mappers;
shownValue()
| rpl::filter($1 == false)
| rpl::start_with_next([this] { clearState(); }, lifetime());
}
void AbstractButton::leaveEventHook(QEvent *e) {
if (_state & StateFlag::Down) return;
setOver(false, StateChangeSource::ByHover);
return TWidget::leaveEventHook(e);
}
void AbstractButton::enterEventHook(QEvent *e) {
checkIfOver(mapFromGlobal(QCursor::pos()));
return TWidget::enterEventHook(e);
}
void AbstractButton::setAcceptBoth(bool acceptBoth) {
_acceptBoth = acceptBoth;
}
void AbstractButton::checkIfOver(QPoint localPos) {
auto over = rect().marginsRemoved(getMargins()).contains(localPos);
setOver(over, StateChangeSource::ByHover);
}
void AbstractButton::mousePressEvent(QMouseEvent *e) {
checkIfOver(e->pos());
if (_acceptBoth || (e->buttons() & Qt::LeftButton)) {
if ((_state & StateFlag::Over) && !(_state & StateFlag::Down)) {
auto was = _state;
_state |= StateFlag::Down;
onStateChanged(was, StateChangeSource::ByPress);
e->accept();
}
}
}
void AbstractButton::mouseMoveEvent(QMouseEvent *e) {
if (rect().marginsRemoved(getMargins()).contains(e->pos())) {
setOver(true, StateChangeSource::ByHover);
} else {
setOver(false, StateChangeSource::ByHover);
}
}
void AbstractButton::mouseReleaseEvent(QMouseEvent *e) {
if (_state & StateFlag::Down) {
auto was = _state;
_state &= ~State(StateFlag::Down);
onStateChanged(was, StateChangeSource::ByPress);
if (was & StateFlag::Over) {
_modifiers = e->modifiers();
auto test = weak(this);
if (_clickedCallback) {
_clickedCallback();
} else {
emit clicked();
}
if (test) {
_clicks.fire({});
}
} else {
setOver(false, StateChangeSource::ByHover);
}
}
}
void AbstractButton::setPointerCursor(bool enablePointerCursor) {
if (_enablePointerCursor != enablePointerCursor) {
_enablePointerCursor = enablePointerCursor;
updateCursor();
}
}
void AbstractButton::setOver(bool over, StateChangeSource source) {
if (over && !(_state & StateFlag::Over)) {
auto was = _state;
_state |= StateFlag::Over;
onStateChanged(was, source);
} else if (!over && (_state & StateFlag::Over)) {
auto was = _state;
_state &= ~State(StateFlag::Over);
onStateChanged(was, source);
}
updateCursor();
}
void AbstractButton::updateCursor() {
auto pointerCursor = _enablePointerCursor && (_state & StateFlag::Over);
setCursor(pointerCursor ? style::cur_pointer : style::cur_default);
}
void AbstractButton::setDisabled(bool disabled) {
auto was = _state;
if (disabled && !(_state & StateFlag::Disabled)) {
_state |= StateFlag::Disabled;
onStateChanged(was, StateChangeSource::ByUser);
} else if (!disabled && (_state & StateFlag::Disabled)) {
_state &= ~State(StateFlag::Disabled);
onStateChanged(was, StateChangeSource::ByUser);
}
}
void AbstractButton::clearState() {
auto was = _state;
_state = StateFlag::None;
onStateChanged(was, StateChangeSource::ByUser);
}
} // namespace Ui