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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "blurpicker.h"
#include <QtWidgets>
#include <QtCore/qmath.h>
#include <qmath.h>
#include "blureffect.h"
BlurPicker::BlurPicker(QWidget *parent): QGraphicsView(parent), m_index(0.0), m_animation(this, "index")
{
setBackgroundBrush(QPixmap(":/images/background.jpg"));
setScene(new QGraphicsScene(this));
setupScene();
setIndex(0);
m_animation.setDuration(400);
m_animation.setEasingCurve(QEasingCurve::InOutSine);
setRenderHint(QPainter::Antialiasing, true);
setFrameStyle(QFrame::NoFrame);
}
qreal BlurPicker::index() const
{
return m_index;
}
void BlurPicker::setIndex(qreal index)
{
m_index = index;
qreal baseline = 0;
const qreal iconAngle = 2 * M_PI / m_icons.count();
for (int i = 0; i < m_icons.count(); ++i) {
QGraphicsItem *icon = m_icons[i];
qreal a = (i + m_index) * iconAngle;
qreal xs = 170 * qSin(a);
qreal ys = 100 * qCos(a);
QPointF pos(xs, ys);
pos = QTransform().rotate(-20).map(pos);
pos -= QPointF(40, 40);
icon->setPos(pos);
baseline = qMax(baseline, ys);
static_cast<BlurEffect *>(icon->graphicsEffect())->setBaseLine(baseline);
}
scene()->update();
}
void BlurPicker::setupScene()
{
scene()->setSceneRect(-200, -120, 400, 240);
QStringList names;
names << ":/images/accessories-calculator.png";
names << ":/images/accessories-text-editor.png";
names << ":/images/help-browser.png";
names << ":/images/internet-group-chat.png";
names << ":/images/internet-mail.png";
names << ":/images/internet-web-browser.png";
names << ":/images/office-calendar.png";
names << ":/images/system-users.png";
for (int i = 0; i < names.count(); i++) {
QPixmap pixmap(names[i]);
QGraphicsPixmapItem *icon = scene()->addPixmap(pixmap);
icon->setZValue(1);
icon->setGraphicsEffect(new BlurEffect(icon));
m_icons << icon;
}
QGraphicsPixmapItem *bg = scene()->addPixmap(QPixmap(":/images/background.jpg"));
bg->setZValue(0);
bg->setPos(-200, -150);
}
void BlurPicker::keyPressEvent(QKeyEvent *event)
{
int delta = 0;
switch (event->key())
{
case Qt::Key_Left:
delta = -1;
break;
case Qt::Key_Right:
delta = 1;
break;
default:
break;
}
if (m_animation.state() == QAbstractAnimation::Stopped && delta) {
m_animation.setEndValue(m_index + delta);
m_animation.start();
event->accept();
}
}
void BlurPicker::resizeEvent(QResizeEvent * /* event */)
{
}
void BlurPicker::mousePressEvent(QMouseEvent *event)
{
int delta = 0;
if (event->position().x() > (width() / 2))
{
delta = 1;
}
else
{
delta = -1;
}
if (m_animation.state() == QAbstractAnimation::Stopped && delta) {
m_animation.setEndValue(m_index + delta);
m_animation.start();
event->accept();
}
}
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