87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
#include <QHBoxLayout>
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#include <QPainter>
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#include <QPropertyAnimation>
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#include "tabs.h"
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#include "tab.h"
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Tabs::Tabs(QWidget *parent)
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: QWidget(parent),
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_tabLayout(new QHBoxLayout),
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_animation(new QPropertyAnimation(this)),
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_tab(0),
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_tween(1)
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{
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_animation->setPropertyName("tween");
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_animation->setEasingCurve(QEasingCurve::OutCirc);
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_animation->setTargetObject(this);
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_animation->setDuration(700);
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setLayout(_tabLayout);
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_tabLayout->setSpacing(0);
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_tabLayout->setMargin(0);
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}
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Tabs::~Tabs()
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{
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}
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void Tabs::addTab(Tab *tab)
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{
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_tabLayout->addWidget(tab);
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connect(tab, SIGNAL(clicked()), this, SLOT(switchActiveTab()));
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}
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void Tabs::paintEvent(QPaintEvent *event)
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{
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Q_UNUSED(event)
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QPainter painter(this);
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painter.fillRect(_inkBarGeometry, Qt::black);
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}
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void Tabs::switchActiveTab()
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{
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Tab *tab = static_cast<Tab *>(sender());
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if (tab) {
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_previousGeometry = _inkBarGeometry;
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_tab = _tabLayout->indexOf(tab);
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_inkBarGeometry = _tabLayout->itemAt(_tab)->geometry();
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_animation->stop();
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_animation->setStartValue(0);
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_animation->setEndValue(1);
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_animation->start();
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emit currentChanged(_tab);
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}
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}
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void Tabs::moveEvent(QMoveEvent *event)
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{
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Q_UNUSED(event)
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updateInkBar();
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}
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void Tabs::resizeEvent(QResizeEvent *event)
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{
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Q_UNUSED(event)
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updateInkBar();
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}
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void Tabs::updateInkBar()
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{
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QLayoutItem *item = _tabLayout->itemAt(_tab);
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if (item) {
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const QRect &r = item->geometry();
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const qreal s = 1-_tween;
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if (QAbstractAnimation::Running != _animation->state()) {
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_inkBarGeometry = QRect(r.left(), r.bottom()-3, r.width(), 4);
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} else {
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const qreal left = _previousGeometry.left()*s + r.left()*_tween;
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const qreal width = _previousGeometry.width()*s + r.width()*_tween;
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_inkBarGeometry = QRect(left, r.bottom()-3, width, 4);
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}
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update();
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}
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}
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