tdesktop/Telegram/SourceFiles/gui/switcher.cpp

158 lines
4.0 KiB
C++

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