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Code Issues Releases Wiki Activity

New history-to-down button.

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This commit is contained in:
John Preston
2016-05-19 20:18:23 +03:00
parent bdc8b3585d
commit 1dfb8cbde2
15 changed files with 223 additions and 29 deletions
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68
Telegram/SourceFiles/ui/buttons/history_down_button.cpp Normal file
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/*
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) 2014-2016 John Preston, https://desktop.telegram.org
*/
#include "stdafx.h"
#include "ui/buttons/history_down_button.h"
#include "styles/style_history.h"
namespace Ui {
HistoryDownButton::HistoryDownButton(QWidget *parent) : Button(parent)
, a_arrowOpacity(st::btnAttachEmoji.opacity, st::btnAttachEmoji.opacity)
, _a_arrowOver(animation(this, &HistoryDownButton::step_arrowOver)) {
setCursor(style::cur_pointer);
resize(st::historyToDown.width(), st::historyToDown.height());
connect(this, SIGNAL(stateChanged(int,ButtonStateChangeSource)), this, SLOT(onStateChange(int,ButtonStateChangeSource)));
}
void HistoryDownButton::paintEvent(QPaintEvent *e) {
Painter p(this);
st::historyToDown.paint(p, QPoint(0, 0), width());
p.setOpacity(a_arrowOpacity.current());
st::historyToDownArrow.paint(p, QPoint(0, 0), width());
}
void HistoryDownButton::onStateChange(int oldState, ButtonStateChangeSource source) {
a_arrowOpacity.start((_state & (StateOver | StateDown)) ? st::btnAttachEmoji.overOpacity : st::btnAttachEmoji.opacity);
if (source == ButtonByUser || source == ButtonByPress) {
_a_arrowOver.stop();
a_arrowOpacity.finish();
update();
} else {
_a_arrowOver.start();
}
}
void HistoryDownButton::step_arrowOver(float64 ms, bool timer) {
float64 dt = ms / st::btnAttachEmoji.duration;
if (dt >= 1) {
_a_arrowOver.stop();
a_arrowOpacity.finish();
} else {
a_arrowOpacity.update(dt, anim::linear);
}
if (timer) update();
}
} // namespace Ui