136 lines
4.1 KiB
C++
136 lines
4.1 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) 2014-2016 John Preston, https://desktop.telegram.org
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*/
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#include "stdafx.h"
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#include "ui/buttons/history_down_button.h"
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#include "styles/style_history.h"
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#include "dialogs/dialogs_layout.h"
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namespace Ui {
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HistoryDownButton::HistoryDownButton(QWidget *parent) : Button(parent)
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, a_arrowOpacity(st::btnAttachEmoji.opacity, st::btnAttachEmoji.opacity)
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, _a_arrowOver(animation(this, &HistoryDownButton::step_arrowOver)) {
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setCursor(style::cur_pointer);
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int iconWidth = st::historyToDown.width();
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int iconHeight = st::historyToDown.height();
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int retina = cIntRetinaFactor();
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resize(iconWidth, st::historyToDownPaddingTop + iconHeight);
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QImage cache(iconWidth * retina, iconHeight * retina, QImage::Format_ARGB32_Premultiplied);
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cache.setDevicePixelRatio(cRetinaFactor());
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{
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Painter p(&cache);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.fillRect(0, 0, iconWidth, iconHeight, st::transparent);
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st::historyToDown.paint(p, QPoint(0, 0), st::historyToDown.width());
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}
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_cache = App::pixmapFromImageInPlace(std_::move(cache));
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_cache.setDevicePixelRatio(cRetinaFactor());
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hide();
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}
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void HistoryDownButton::paintEvent(QPaintEvent *e) {
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Painter p(this);
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float64 opacity = 1.;
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if (_a_show.animating(getms())) {
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opacity = _a_show.current();
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p.setOpacity(opacity);
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p.drawPixmap(0, st::historyToDownPaddingTop, _cache);
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} else if (!_shown) {
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hide();
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return;
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} else {
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st::historyToDown.paint(p, QPoint(0, st::historyToDownPaddingTop), width());
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}
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p.setOpacity(opacity * a_arrowOpacity.current());
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st::historyToDownArrow.paint(p, QPoint(0, st::historyToDownPaddingTop), width());
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if (_unreadCount > 0) {
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p.setOpacity(opacity);
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bool active = false, muted = false;
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auto unreadString = QString::number(_unreadCount);
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if (unreadString.size() > 4) {
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unreadString = qsl("..") + unreadString.mid(unreadString.size() - 4);
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}
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Dialogs::Layout::paintUnreadCount(p, unreadString, width(), 0, style::al_center, active, muted, nullptr);
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}
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}
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void HistoryDownButton::onStateChanged(int oldState, ButtonStateChangeSource source) {
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a_arrowOpacity.start((_state & (StateOver | StateDown)) ? st::btnAttachEmoji.overOpacity : st::btnAttachEmoji.opacity);
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if (source == ButtonByUser || source == ButtonByPress) {
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_a_arrowOver.stop();
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a_arrowOpacity.finish();
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update();
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} else {
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_a_arrowOver.start();
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}
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}
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void HistoryDownButton::setUnreadCount(int unreadCount) {
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_unreadCount = unreadCount;
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update();
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}
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bool HistoryDownButton::hidden() const {
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return !_shown;
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}
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void HistoryDownButton::showAnimated() {
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if (_shown) return;
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if (isHidden()) show();
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toggleAnimated();
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}
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void HistoryDownButton::hideAnimated() {
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if (!_shown) return;
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toggleAnimated();
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}
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void HistoryDownButton::toggleAnimated() {
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_shown = !_shown;
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float64 from = _shown ? 0. : 1., to = _shown ? 1. : 0.;
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START_ANIMATION(_a_show, func(this, &HistoryDownButton::repaintCallback), from, to, st::btnAttachEmoji.duration, anim::linear);
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}
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void HistoryDownButton::finishAnimation() {
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_a_show.finish();
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setVisible(_shown);
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}
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void HistoryDownButton::step_arrowOver(float64 ms, bool timer) {
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float64 dt = ms / st::btnAttachEmoji.duration;
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if (dt >= 1) {
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_a_arrowOver.stop();
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a_arrowOpacity.finish();
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} else {
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a_arrowOpacity.update(dt, anim::linear);
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}
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if (timer) update();
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}
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} // namespace Ui
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