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https://github.com/vale981/tdesktop
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958e47cc19
HistoryToEnd button is always shown if there are unread messages. HistoryToEnd button displayes unread messages count. New service message (HistoryCleared) is handled (not displayed at all).
83 lines
2.8 KiB
C++
83 lines
2.8 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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resize(st::historyToDown.width(), st::historyToDownPaddingTop + st::historyToDown.height());
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connect(this, SIGNAL(stateChanged(int,ButtonStateChangeSource)), this, SLOT(onStateChange(int,ButtonStateChangeSource)));
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}
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void HistoryDownButton::paintEvent(QPaintEvent *e) {
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Painter p(this);
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st::historyToDown.paint(p, QPoint(0, st::historyToDownPaddingTop), width());
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p.setOpacity(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(1);
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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::onStateChange(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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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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