57 lines
1.9 KiB
C++
57 lines
1.9 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/icon_button.h"
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namespace Ui {
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IconButton::IconButton(QWidget *parent, const style::IconButton &st) : Button(parent)
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, _st(st) {
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resize(_st.width, _st.height);
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setCursor(style::cur_pointer);
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}
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void IconButton::setIcon(const style::icon *icon) {
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_iconOverride = icon;
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update();
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}
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void IconButton::paintEvent(QPaintEvent *e) {
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Painter p(this);
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auto over = _a_over.current(getms(), (_state & StateOver) ? 1. : 0.);
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p.setOpacity(over * _st.overOpacity + (1. - over) * _st.opacity);
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auto position = (_state & StateDown) ? _st.downIconPosition : _st.iconPosition;
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(_iconOverride ? _iconOverride : &_st.icon)->paint(p, position, width());
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}
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void IconButton::onStateChanged(int oldState, ButtonStateChangeSource source) {
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auto over = (_state & StateOver);
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if (over != (oldState & StateOver)) {
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auto from = over ? 0. : 1.;
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auto to = over ? 1. : 0.;
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START_ANIMATION(_a_over, func(this, &IconButton::updateCallback), from, to, _st.duration, anim::linear);
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}
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}
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} // namespace Ui
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