111 lines
3.1 KiB
C++
111 lines
3.1 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/round_button.h"
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namespace Ui {
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RoundButton::RoundButton(QWidget *parent, const QString &text, const style::BoxButton &st) : Button(parent)
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, _text(text.toUpper())
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, _fullText(text.toUpper())
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, _textWidth(st.font->width(_text))
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, _st(st)
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, a_textBgOverOpacity(0)
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, a_textFg(st.textFg->c)
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, _a_over(animation(this, &RoundButton::step_over)) {
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resizeToText();
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setCursor(style::cur_pointer);
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}
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void RoundButton::setText(const QString &text) {
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_text = text;
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_fullText = text;
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_textWidth = _st.font->width(_text);
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resizeToText();
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}
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void RoundButton::resizeToText() {
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if (_st.width <= 0) {
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resize(_textWidth - _st.width, _st.height);
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} else {
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if (_st.width < _textWidth + (_st.height - _st.font->height)) {
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_text = _st.font->elided(_fullText, qMax(_st.width - (_st.height - _st.font->height), 1));
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_textWidth = _st.font->width(_text);
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}
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resize(_st.width, _st.height);
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}
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}
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void RoundButton::paintEvent(QPaintEvent *e) {
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Painter p(this);
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App::roundRect(p, rect(), _st.textBg);
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float64 o = a_textBgOverOpacity.current();
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if (o > 0) {
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p.setOpacity(o);
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App::roundRect(p, rect(), _st.textBgOver);
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p.setOpacity(1);
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}
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if (!_text.isEmpty()) {
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if (o > 0) {
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p.setPen(a_textFg.current());
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} else {
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p.setPen(_st.textFg);
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}
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p.setFont(_st.font);
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p.drawText((width() - _textWidth) / 2, _st.textTop + _st.font->ascent, _text);
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}
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_st.icon.paint(p, QPoint(0, 0), width());
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}
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void RoundButton::step_over(float64 ms, bool timer) {
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float64 dt = ms / _st.duration;
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if (dt >= 1) {
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_a_over.stop();
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a_textFg.finish();
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a_textBgOverOpacity.finish();
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} else {
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a_textFg.update(dt, anim::linear);
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a_textBgOverOpacity.update(dt, anim::linear);
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}
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if (timer) update();
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}
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void RoundButton::onStateChanged(int oldState, ButtonStateChangeSource source) {
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float64 textBgOverOpacity = (_state & StateOver) ? 1 : 0;
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style::color textFg = (_state & StateOver) ? (_st.textFgOver) : _st.textFg;
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a_textBgOverOpacity.start(textBgOverOpacity);
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a_textFg.start(textFg->c);
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if (source == ButtonByUser || source == ButtonByPress) {
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_a_over.stop();
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a_textBgOverOpacity.finish();
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a_textFg.finish();
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update();
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} else {
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_a_over.start();
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}
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}
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} // namespace Ui
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