tdesktop/Telegram/SourceFiles/ui/toast/toast_widget.cpp

80 lines
2.8 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/toast/toast_widget.h"
namespace Ui {
namespace Toast {
namespace internal {
namespace {
constexpr auto kToastMaxLines = 16;
} // namespace
Widget::Widget(QWidget *parent, const Config &config) : TWidget(parent)
, _multiline(config.maxWidth > 0)
, _maxWidth((config.maxWidth > 0) ? config.maxWidth : st::toastMaxWidth)
, _padding((config.padding.left() > 0) ? config.padding : st::toastPadding)
, _maxTextWidth(_maxWidth - _padding.left() - _padding.right())
, _text(_multiline ? _maxTextWidth : QFIXED_MAX) {
TextParseOptions toastOptions = { 0, _maxTextWidth, st::toastTextStyle.font->height, Qt::LayoutDirectionAuto };
if (_multiline) {
toastOptions.maxh *= kToastMaxLines;
}
_text.setText(st::toastTextStyle, _multiline ? config.text : textOneLine(config.text), toastOptions);
setAttribute(Qt::WA_TransparentForMouseEvents);
onParentResized();
show();
}
void Widget::onParentResized() {
auto newWidth = _maxWidth;
accumulate_min(newWidth, _padding.left() + _text.maxWidth() + _padding.right());
accumulate_min(newWidth, parentWidget()->width() - 2 * st::toastMinMargin);
_textWidth = newWidth - _padding.left() - _padding.right();
auto maxHeight = kToastMaxLines * st::toastTextStyle.font->height;
auto textHeight = _multiline ? qMin(_text.countHeight(_textWidth), maxHeight) : _text.minHeight();
auto newHeight = _padding.top() + textHeight + _padding.bottom();
setGeometry((parentWidget()->width() - newWidth) / 2, (parentWidget()->height() - newHeight) / 2, newWidth, newHeight);
}
void Widget::setShownLevel(float64 shownLevel) {
_shownLevel = shownLevel;
}
void Widget::paintEvent(QPaintEvent *e) {
Painter p(this);
PainterHighQualityEnabler hq(p);
p.setOpacity(_shownLevel);
App::roundRect(p, rect(), st::toastBg, ImageRoundRadius::Large);
auto lines = _multiline ? kToastMaxLines : 1;
p.setPen(st::toastFg);
_text.drawElided(p, _padding.left(), _padding.top(), _textWidth + 1, lines);
}
} // namespace internal
} // namespace Toast
} // namespace Ui