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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: qt-info@nokia.com
**
** This software, including documentation, is protected by copyright
** controlled by Nokia Corporation. You may use this software in
** accordance with the terms and conditions contained in the Qt Phone
** Demo License Agreement.
**
****************************************************************************/
#include "horizontalmenu.h"
#include "dataresource.h"
#include "pixmaploader.h"
static const char *optionKeys[] = {
"food", "car", "house", "books", "clothes", "fun", "health",
"travel", "overall"
};
HorizontalMenu::HorizontalMenu(bool hasOverallIcon)
: PixmapWidget(PixmapLoader::pixmap(":/carrousel_bg.png")),
selectedIndex(0),
isSliding(false),
moveThreshold(15)
{
clipper = new QGraphicsWidget(this);
clipper->resize(size());
clipper->setPos(0, 0);
clipper->setFlag(QGraphicsItem::ItemClipsChildrenToShape, true);
clipper->setZValue(2);
w = new QGraphicsWidget(clipper);
l = new QGraphicsLinearLayout(Qt::Horizontal);
w->setLayout(l);
markSelection = new PixmapWidget(0);
marker = new QGraphicsRectItem(0, 0, 90, 90, this);
fillWidget(hasOverallIcon);
light = new PixmapWidget(Resource::stringValue("Widgets/HorizontalMenu.light"));
yOffset = Resource::intValue("Widgets/HorizontalMenu.yOffset");
markOffset = Resource::intValue("Widgets/HorizontalMenu.markOffset");
lightOffset = Resource::intValue("Widgets/HorizontalMenu.lightOffset");
light->setParentItem(this);
light->setZValue(1);
if (hasOverallIcon)
w->moveBy(-2000, yOffset); // ###
else
w->moveBy(0, yOffset);
centralizeAnimation = new QPropertyAnimation(w, "x", this);
centralizeAnimation->setDuration(240);
// Fade In Animation, from 0 to 1. We use the setDirection method to
// produce fade out animation.
fadeAnimation = new QPropertyAnimation(markSelection, "opacity", this);
fadeAnimation->setStartValue(0.0);
fadeAnimation->setEndValue(1.0);
fadeAnimation->setDuration(220);
// Sequential Animation = Centralize Animation + Fade In Animation
sequentialAnimation = new QSequentialAnimationGroup(this);
sequentialAnimation->addAnimation(centralizeAnimation);
sequentialAnimation->addAnimation(fadeAnimation);
connect(centralizeAnimation, SIGNAL(stateChanged(QAbstractAnimation::State,
QAbstractAnimation::State)),
SLOT(centralizedStarted()));
connect(centralizeAnimation, SIGNAL(finished()), SLOT(optionSelected()));
}
HorizontalMenu::~HorizontalMenu()
{
}
int HorizontalMenu::count() const
{
return l->count();
}
void HorizontalMenu::optionSelected()
{
emit optionChanged(selected());
}
QString HorizontalMenu::selected() const
{
if (selectedIndex < 0)
return QString();
else
return optionKeys[selectedIndex];
}
void HorizontalMenu::resizeEvent(QGraphicsSceneResizeEvent *event)
{
PixmapWidget::resizeEvent(event);
const int w = size().width();
const int h = size().height();
const QSizeF &itemSize = l->itemAt(0)->preferredSize();
clipper->resize(w, h);
marker->setRect(0, 0, itemSize.width(), h);
marker->setPos(w / 2 - itemSize.width() / 2, 0);
markSelection->setGeometry(0, 0, w, markOffset);
light->setPos(0, lightOffset);
// ajust selected item
focusMenuItem(selectedIndex, false);
}
void HorizontalMenu::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
isSliding = false;
pressedX = event->pos().x();
// fade out
fadeAnimation->setDirection(QAbstractAnimation::Backward);
fadeAnimation->start();
}
void HorizontalMenu::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
const int ex = event->pos().x();
if (qAbs(ex - pressedX) > moveThreshold)
isSliding = true;
if (isSliding) {
const int mx = marker->pos().x();
const int mw = marker->rect().width();
const int fx = w->x() + ex - event->lastPos().x();
w->setX(qBound<qreal>(mx + mw - w->size().width(), fx, mx));
}
}
void HorizontalMenu::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
//fade in
fadeAnimation->setDirection(QAbstractAnimation::Forward);
if (isSliding) {
const int index = indexAtPosition(size().width() / 2);
isSliding = false;
focusMenuItem(index >= 0 ? index : selectedIndex);
} else {
const int index = indexAtPosition(event->pos().x());
if (index >= 0) {
selectedIndex = index;
focusMenuItem(selectedIndex);
}
}
}
void HorizontalMenu::fillWidget(bool hasOverallIcon)
{
markSelection->setParentItem(this);
markSelection->setCacheMode(NoCache);
markSelection->setOpacity(0.0);
markSelection->setPos(0, 0);
marker->setPen(Qt::NoPen);
MenuIconWidget *item;
for (int i = Food; i <= Travel; i++) {
item = new MenuIconWidget(Option(i));
l->addItem(item);
l->setAlignment(item, Qt::AlignCenter);
selectionPixmaps << QPixmap(PixmapLoader::pixmap(QString(":/carrousel_bg_%1.png")
.arg(optionKeys[i])));
}
if (hasOverallIcon) {
item = new MenuIconWidget(Overall);
l->addItem(item);
l->setAlignment(item, Qt::AlignCenter);
selectionPixmaps << QPixmap(PixmapLoader::pixmap(":/carrousel_bg_overall.png"));
}
l->setContentsMargins(0, 0, 0, 0);
w->setContentsMargins(0, 0, 0, 0);
l->setSpacing(item->preferredSize().width() / 3);
}
void HorizontalMenu::centralizedStarted()
{
markSelection->setPixmap(selectionPixmaps[selectedIndex]);
}
int HorizontalMenu::indexAtPosition(qreal x)
{
int result = (x - w->x()) / (w->size().width() / l->count());
return (result < 0 || result >= l->count()) ? -1 : result;
}
void HorizontalMenu::focusMenuItem(int index, bool animated)
{
const qreal iw = marker->rect().width() + l->spacing();
const qreal fx = marker->x() - iw * index;
selectedIndex = index;
if (!animated) {
w->setX(fx);
markSelection->setOpacity(1.0);
markSelection->setPixmap(selectionPixmaps[selectedIndex]);
optionSelected();
} else {
centralizeAnimation->setStartValue(w->x());
centralizeAnimation->setEndValue(fx);
sequentialAnimation->start();
}
}
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