157 lines
4 KiB
C++
157 lines
4 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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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014 John Preston, https://desktop.telegram.org
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*/
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#include "stdafx.h"
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#include "switcher.h"
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Switcher::Switcher(QWidget *parent, const style::switcher &st) : TWidget(parent)
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, _selected(0)
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, _over(-1)
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, _wasOver(-1)
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, _pressed(-1)
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, _st(st)
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, a_bgOver(_st.bgColor->c)
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, a_bgWasOver(_st.bgHovered->c) {
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resize(width(), _st.height);
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}
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void Switcher::leaveEvent(QEvent *e) {
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setOver(-1);
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if (_pressed >= 0) return;
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setMouseTracking(false);
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return TWidget::leaveEvent(e);
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}
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void Switcher::enterEvent(QEvent *e) {
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setMouseTracking(true);
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return TWidget::enterEvent(e);
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}
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void Switcher::mousePressEvent(QMouseEvent *e) {
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if (e->buttons() & Qt::LeftButton) {
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mouseMoveEvent(e);
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if (_over != _pressed) {
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_pressed = _over;
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e->accept();
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}
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}
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}
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void Switcher::mouseMoveEvent(QMouseEvent *e) {
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if (rect().contains(e->pos())) {
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if (width()) {
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setOver((e->pos().x() * _buttons.size()) / width());
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}
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} else {
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setOver(-1);
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}
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}
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void Switcher::mouseReleaseEvent(QMouseEvent *e) {
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if (_pressed >= 0) {
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if (_pressed == _over && _pressed != _selected) {
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setSelected(_pressed);
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} else {
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setSelected(_selected);
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}
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} else {
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leaveEvent(e);
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}
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}
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void Switcher::addButton(const QString &btn) {
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_buttons.push_back(btn);
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update();
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}
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bool Switcher::animStep(float64 ms) {
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float64 dt = ms / _st.duration;
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bool res = true;
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if (dt >= 1) {
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res = false;
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a_bgOver.finish();
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a_bgWasOver.finish();
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} else {
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a_bgOver.update(dt, anim::linear);
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a_bgWasOver.update(dt, anim::linear);
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}
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update();
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return res;
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}
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void Switcher::paintEvent(QPaintEvent *e) {
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QPainter p(this);
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p.fillRect(rect(), _st.bgColor->b);
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if (!_buttons.isEmpty()) {
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p.setFont(_st.font->f);
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float64 btnWidth = float64(width()) / _buttons.size();
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for (int i = 0; i < _buttons.size(); ++i) {
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QRect btnRect(qRound(i * btnWidth), 0, qRound((i + 1) * btnWidth) - qRound(i * btnWidth), height());
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if (i == _selected) {
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p.fillRect(btnRect, _st.bgActive->b);
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} else if (i == _over) {
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p.fillRect(btnRect, a_bgOver.current());
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} else if (i == _wasOver) {
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p.fillRect(btnRect, a_bgWasOver.current());
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}
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p.setPen((i == _selected ? _st.activeColor : _st.textColor)->p);
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p.drawText(btnRect, _buttons[i], style::al_center);
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}
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}
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if (_st.border) {
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p.fillRect(0, 0, width() - _st.border, _st.border, _st.borderColor->b);
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p.fillRect(width() - _st.border, 0, _st.border, height() - _st.border, _st.borderColor->b);
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p.fillRect(_st.border, height() - _st.border, width() - _st.border, _st.border, _st.borderColor->b);
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p.fillRect(0, _st.border, _st.border, height() - _st.border, _st.borderColor->b);
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}
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}
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int Switcher::selected() const {
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return _selected;
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}
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void Switcher::setSelected(int selected) {
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if (selected != _selected) {
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_selected = selected;
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emit changed();
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}
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_pressed = _over = _wasOver = -1;
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anim::stop(this);
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setCursor(style::cur_default);
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update();
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}
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void Switcher::setOver(int over) {
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if (over != _over) {
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QColor c(a_bgOver.current());
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if (_wasOver == over) {
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a_bgOver = anim::cvalue(a_bgWasOver.current(), _st.bgHovered->c);
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} else {
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a_bgOver = anim::cvalue(_st.bgColor->c, _st.bgHovered->c);
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}
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a_bgWasOver = anim::cvalue(c, _st.bgColor->c);
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_wasOver = _over;
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_over = over;
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anim::start(this);
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setCursor((_over >= 0 && _over != _selected) ? style::cur_pointer : style::cur_default);
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}
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}
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