tdesktop/Telegram/SourceFiles/ui/abstract_button.cpp

134 lines
3.5 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "ui/abstract_button.h"
#include <rpl/filter.h>
#include <rpl/mappers.h>
#include "messenger.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 weak = make_weak(this);
if (_clickedCallback) {
_clickedCallback();
} else {
emit clicked();
}
if (weak) {
_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;
Messenger::Instance().registerLeaveSubscription(this);
onStateChanged(was, source);
} else if (!over && (_state & StateFlag::Over)) {
auto was = _state;
_state &= ~State(StateFlag::Over);
Messenger::Instance().unregisterLeaveSubscription(this);
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