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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: glxzoomwidget.cpp
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* description of the class GlxGlxZoomWidget which controls the Zoom behavior of coverflow.
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*
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*/
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#include <QPinchGesture>
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#include <hbiconitem.h>
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#include <QTimeLine>
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#include <QGesture>
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#include <hbinstance.h>
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#include "glximagedecoderwrapper.h"
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#include "glxmodelparm.h"
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#include "glxzoomwidget.h"
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const int MAXZVALUE = 100;
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const int MINZVALUE = 0;
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const int NOOFSTEPSZI = 24;
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const int NOOFSTEPSZO = 18;
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const float MAXDTZOOMIN = 3.5;
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GlxZoomWidget::GlxZoomWidget(QGraphicsItem *parent):HbScrollArea(parent),
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mModel(NULL), mMinZValue(MINZVALUE),
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mMaxZValue(MAXZVALUE), mTimerId(0),
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mImageDecodeRequestSend(false),
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mPinchGestureOngoing(false), mDecodedImageAvailable(false),
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mZoomOngoing(false)
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{
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grabGesture(Qt::PinchGesture);
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grabGesture(Qt::TapGesture);
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setAcceptTouchEvents(true) ;
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setFrictionEnabled(true);
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setZValue(mMinZValue);
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//create the child items and background
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mZoomWidget = new QGraphicsWidget(this);
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mZoomItem = new QGraphicsPixmapItem(mZoomWidget);
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mZoomItem->setTransformationMode(Qt::SmoothTransformation);
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//the black background
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//replace when a proper substitute for setting backgrounds is known
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mBlackBackgroundItem = new HbIconItem(this);
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mBlackBackgroundItem->setBrush(QBrush(Qt::black));
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mBlackBackgroundItem->hide();
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//does not work so is commented
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//setBackgroundItem(mBlackBackgroundItem);
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//initializing the image decoder
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mImageDecoder = new GlxImageDecoderWrapper;
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setVerticalScrollBarPolicy(HbScrollArea::ScrollBarAlwaysOff);
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setHorizontalScrollBarPolicy(HbScrollArea::ScrollBarAlwaysOff);
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//AA: signal and slot to perform double tap animation
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//after every step redraw, signal is emitted to perform the next step
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connect( this, SIGNAL( stepZoom() ), this, SLOT( animateDoubleTap() ), Qt::QueuedConnection );
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}
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GlxZoomWidget::~GlxZoomWidget()
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{
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//AA
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disconnect( this, SIGNAL( stepZoom() ), this, SLOT( animateDoubleTap()));
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//no Null checks required
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delete mZoomItem;
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// delete mZoomWidget; //as this is a content widegt it will automatically be deleted
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delete mBlackBackgroundItem;
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//reset the decoder to cancel pending tasks
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if(mImageDecoder) {
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resetDecoder();
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delete mImageDecoder;
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}
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}
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void GlxZoomWidget::resetDecoder()
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{
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mImageDecoder->resetDecoder();
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mImageDecodeRequestSend = false;
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mDecodedImageAvailable = false;
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}
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void GlxZoomWidget::setModel (QAbstractItemModel *model)
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{
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if(model)
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{
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mModel = model;
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retreiveFocusedImage(); //Update mZoomItem with focused Image
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connect( mModel, SIGNAL( dataChanged(QModelIndex,QModelIndex) ), this, SLOT( dataChanged(QModelIndex,QModelIndex) ) );
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connect( mModel, SIGNAL( destroyed() ), this, SLOT( modelDestroyed() ) );
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}
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}
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void GlxZoomWidget::setWindowSize(QSize windowSize)
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{
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mWindowSize = windowSize;
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mBlackBackgroundItem->setGeometry(QRectF(QPointF(0,0), mWindowSize));
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//try to reset the max and min zoomed size here
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//In case the zoom widget is in background reset it
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if(!mZoomOngoing && mModel) {
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retreiveFocusedImage();
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}
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setZoomParams();
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}
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void GlxZoomWidget::forceZoomToBackground()
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{
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mBlackBackgroundItem->hide();
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//push the widget back to background
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setZValue(mMinZValue);
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mZoomOngoing = false;
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emit zoomWidgetMovedBackground(mFocusIndex);
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//this actually resets the ZoomWidget and decoder
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if(mImageDecoder) {
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resetDecoder();
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}
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retreiveFocusedImage();
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}
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void GlxZoomWidget::indexChanged(int index)
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{
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if(mFocusIndex != index) {
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resetDecoder(); //reset the decoder first to cancel pending tasks
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retreiveFocusedImage(); //Update mZoomItem with focused Image
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}
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}
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void GlxZoomWidget::cleanUp()
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{
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disconnect(this,SIGNAL( pinchGestureReceived(int) ), this, SLOT( sendDecodeRequest(int) ) );
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if(mModel) {
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disconnect( mModel, SIGNAL( dataChanged(QModelIndex,QModelIndex) ), this, SLOT( dataChanged(QModelIndex,QModelIndex) ) );
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disconnect( mModel, SIGNAL( destroyed() ), this, SLOT( modelDestroyed() ) );
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mModel = NULL;
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}
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if(mImageDecoder) {
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resetDecoder();
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}
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mZoomItem->setPixmap(QPixmap());
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}
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void GlxZoomWidget::activate()
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{
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}
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void GlxZoomWidget::setMinMaxZValue(int minZvalue, int maxZvalue)
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{
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mMinZValue = minZvalue;
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mMaxZValue = maxZvalue;
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}
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void GlxZoomWidget::connectDecodeRequestToPinchEvent()
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{
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connect(this,SIGNAL( pinchGestureReceived(int) ), this, SLOT( sendDecodeRequest(int) ), Qt::QueuedConnection );
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}
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bool GlxZoomWidget::sceneEvent(QEvent *event)
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{
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bool consume(false);
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if (event->type() == QEvent::Gesture) {
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consume = executeGestureEvent(this, static_cast<QGestureEvent*>(event));
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}
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if(!consume)
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{
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consume = HbScrollArea::sceneEvent(event);
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}
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return consume;
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}
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bool GlxZoomWidget::sceneEventFilter(QGraphicsItem *watched,QEvent *event)
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{
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qDebug( "GlxZoomWidget::sceneEventFilter enter event type %d ", event->type() );
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bool consume = false;
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if (event->type() == QEvent::Gesture) {
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consume = executeGestureEvent(watched, static_cast<QGestureEvent*>(event));
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}
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if(!consume) {
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consume = HbScrollArea::sceneEventFilter(watched,event);
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}
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return consume;
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}
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bool GlxZoomWidget::executeGestureEvent(QGraphicsItem *source,QGestureEvent *event)
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{
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if(QTapGesture *gesture = static_cast<QTapGesture *>(event->gesture(Qt::TapGesture))) {
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if (gesture->state() == Qt::GestureFinished) {
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if(!mTimerId) {
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mTimerId = startTimer( DOUBLETAP_TIMEINTERVAL );
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}
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else {
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killTimer(mTimerId);
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mTimerId = 0;
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animateZoomOut(hbInstance->allMainWindows().first()->mapToScene(gesture->position().toPoint()));
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}
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}
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event->accept(gesture);
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return true;
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}
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if (QGesture *pinch = event->gesture(Qt::PinchGesture)) {
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if (isFocussedItemCorrupt()){
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return true;
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}
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QPinchGesture* pinchG = static_cast<QPinchGesture *>(pinch);
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QPinchGesture::ChangeFlags changeFlags = pinchG->changeFlags();
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if (changeFlags & QPinchGesture::ScaleFactorChanged) {
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mPinchGestureOngoing = true;
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mZoomOngoing = true;
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//retreive the gesture values
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qreal value = pinchG->scaleFactor() / pinchG->lastScaleFactor();
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QPointF center = pinchG->property("centerPoint").toPointF();
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//set the gesture center to the scene coordinates
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QPointF sceneGestureCenter = hbInstance->allMainWindows().first()->mapToScene(center.toPoint());
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zoomImage(value, sceneGestureCenter);
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}
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if (pinchG->state() == Qt::GestureStarted) {
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emit pinchGestureReceived(mFocusIndex);
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//bring the zoom widget to foreground
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if(zValue()!=mMaxZValue)
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{
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setZValue(mMaxZValue);
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//show the black background
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mBlackBackgroundItem->setParentItem(parentItem());
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mBlackBackgroundItem->setZValue(mMaxZValue - 1);
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mBlackBackgroundItem->show();
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}
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}
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if (pinchG->state() == Qt::GestureFinished) {
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//For giving a spring effect when user has zoomed more than normal.
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if(mStepCurrentSize.width() > mMaxScaleDecSize.width()) {
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//scale the image to limited size
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qreal value = mMaxScaleDecSize.width()/mCurrentSize.width();
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QPointF center(mWindowSize.width()/2, mWindowSize.height()/2);
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QPointF sceneGestureCenter = source->sceneTransform().map(center);
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zoomImage(value, sceneGestureCenter);
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}
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mPinchGestureOngoing = false;
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//finalize the transforms to the geometry else panning will not work
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finalizeWidgetTransform();
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//push the Zoom widget to background when zoomed image size nears FS image
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if(mStepCurrentSize.width() <= mMinDecScaleSize.width()*1.3) {
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mBlackBackgroundItem->hide();
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//push the widget back to background
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setZValue(mMinZValue);
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mZoomOngoing = false;
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emit zoomWidgetMovedBackground(mFocusIndex);
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//do not reset the transform here as it will then zoom-in the widget to decoded image size
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}
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}
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//gesture accepted
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return true;
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}
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//gesture rejected
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if(!mPinchGestureOngoing) {
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return false;
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}
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return true;
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}
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void GlxZoomWidget::zoomImage(qreal zoomFactor, QPointF center)
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{
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// Pinch event filtering for very small zoom factors
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if (qAbs(1.0 - zoomFactor) < 0.007) {
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return;
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}
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adjustGestureCenter(center, zoomFactor);
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QSizeF requiredSize(mCurrentSize.width()*zoomFactor, mCurrentSize.height()*zoomFactor);
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limitRequiredSize(requiredSize);
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if(requiredSize != mCurrentSize) {
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QTransform zoomTransform = mZoomWidget->transform();
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QPointF transformedCenter = mZoomWidget->sceneTransform().inverted().map(center);
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zoomTransform.translate(transformedCenter.x(),transformedCenter.y());
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zoomTransform.scale(requiredSize.width()/mCurrentSize.width(), requiredSize.height()/mCurrentSize.height());
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zoomTransform.translate(-transformedCenter.x(),-transformedCenter.y());
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mZoomWidget->setTransform(zoomTransform);
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mCurrentSize = requiredSize;
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}
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}
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void GlxZoomWidget::limitRequiredSize(QSizeF &requiredSize)
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{
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if(requiredSize.width() > mMaxScaleSize.width() ) {
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requiredSize = mMaxScaleSize ;
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}
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else if(requiredSize.width() < mMinDecScaleSize.width() ) {
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requiredSize = mMinDecScaleSize ;
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}
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}
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//makes sure that the gesture is on the screen center if the image is smaller than the screen
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void GlxZoomWidget::adjustGestureCenter(QPointF & gestureCenter, qreal& zoomFactor)
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{
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//clip zoom factor for pinch zoom. Double tap zoomfactor should never exceed
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//1.2 or 0.8 in any given step
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/* if(zoomFactor > 1.2 ) {
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zoomFactor = 1.2;
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}
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if(zoomFactor < 0.7 ) {
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zoomFactor = 0.8;
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}*/
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qDebug("AA::adjustGestureCenter::ZoomFactor (%f)",zoomFactor);
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QPointF itemOriginPos = mZoomWidget->sceneTransform().map(QPointF(0,0));
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QPointF gesCenter = mZoomWidget->sceneTransform().map(gestureCenter);
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//keep smaller image centered irrespective of zoomin or zoom out
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//note, only if the image is smaller than window size, else preserve the
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//gesture center. Adjustments need to be done for both height/width
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//only one of them will be applicable, unless the image is smaller than
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//fullscreen size on both dimensions
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if( (mCurrentSize.width() <= mWindowSize.width())) {
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//requires adjustment only in portrait orientation
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if(mWindowSize.width() > mWindowSize.height())
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gestureCenter.setX(mWindowSize.width()/2);
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}
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//handle the case when CurrentSize is grater than window size
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//this applies to zoomout flow
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else {
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//when the image is positioned beyond the left edge of the window
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//clamp the image to left edge
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if(itemOriginPos.x() >= 0) {
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gestureCenter.setX(itemOriginPos.x());
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}
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//same applies when the image needs clamping on right edge
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else if(itemOriginPos.x()+ mCurrentSize.width() <= mWindowSize.width()){
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gestureCenter.setX(itemOriginPos.x() + mCurrentSize.width());
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}
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//else no clamping is required, theg esture center can be preserved
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//as is for the zoom step
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}
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//same logic applied for Y axis
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if( (mCurrentSize.height() <= mWindowSize.height()) ) {
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//requires adjustment only in landscape orientation
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if(mWindowSize.width() < mWindowSize.height())
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gestureCenter.setY(mWindowSize.height()/2);
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}
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else {
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if(itemOriginPos.y() >= 0) {
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gestureCenter.setY(itemOriginPos.y());
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}
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else if(itemOriginPos.y()+ mCurrentSize.height() <= mWindowSize.height()){
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gestureCenter.setY(itemOriginPos.y() + mCurrentSize.height());
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}
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}
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//special case for images that are smaller on both sides
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//centering of the gesture is important to prevent movement of the image
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//while zoom in or out
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if( (mCurrentSize.height() <= mWindowSize.height()) && (mCurrentSize.width() <= mWindowSize.width()) ) {
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gestureCenter.setX(mWindowSize.width()/2);
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gestureCenter.setY(mWindowSize.height()/2);
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}
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//reduce the ZF so as to show a decelerated effect at max/min levels
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/*
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if(mCurrentSize.width() > mMaxScaleDecSize.width() && zoomFactor > 1 ) {
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zoomFactor = 1.0 + ((zoomFactor-1.0)/6) ;
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}
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if(mCurrentSize.width() < mMinDecScaleSize.width() && zoomFactor < 1 ) {
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zoomFactor = 1.0 - ((1.0-zoomFactor)/6) ;
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}
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*/
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}
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//get the latest focused image and set it to mZoomItem
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void GlxZoomWidget::retreiveFocusedImage()
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{
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390 |
QPixmap targetPixmap(getFocusedImage());
|
|
391 |
//initialize all the variables wrt the focussed pixmap
|
|
392 |
mZoomWidget->resetTransform();
|
|
393 |
mItemSize = targetPixmap.size();
|
|
394 |
mMaxScaleSize = mItemSize;
|
|
395 |
mMaxScaleSize.scale(mWindowSize*13, Qt::KeepAspectRatio);
|
|
396 |
mMaxScaleDecSize = mItemSize;
|
|
397 |
mMaxScaleDecSize.scale(mWindowSize*7, Qt::KeepAspectRatio);
|
|
398 |
mMinScaleSize = mItemSize* 0.7;
|
|
399 |
mMinDecScaleSize = mItemSize;
|
|
400 |
QPointF originPos = sceneTransform().map(QPointF(0,0));
|
|
401 |
mZoomWidget->setGeometry(QRectF(QPointF(mWindowSize.width()/2 - mItemSize.width()/2,mWindowSize.height()/2 - mItemSize.height()/2),mItemSize )); //chk this
|
|
402 |
mZoomWidget->setPreferredSize(mItemSize);
|
|
403 |
mZoomItem->setPixmap(targetPixmap);
|
|
404 |
mCurrentSize = mItemSize;
|
|
405 |
mStepCurrentSize = mItemSize;
|
|
406 |
setContentWidget(mZoomWidget);
|
|
407 |
show();
|
|
408 |
}
|
|
409 |
|
|
410 |
|
|
411 |
void GlxZoomWidget::dataChanged(QModelIndex startIndex, QModelIndex endIndex)
|
|
412 |
{
|
|
413 |
if(mFocusIndex >= startIndex.row() && mFocusIndex <= endIndex.row()) {
|
|
414 |
//get the latest image from the model
|
|
415 |
//will replace a decoded image if callback is received after decoded image is received so a fix is required
|
|
416 |
//retreiveFocusedImage();
|
|
417 |
if(!mDecodedImageAvailable) {
|
|
418 |
QPixmap targetPixmap(getFocusedImage());
|
44
|
419 |
mItemSize = targetPixmap.size();
|
|
420 |
mMaxScaleSize = mItemSize;
|
|
421 |
mMaxScaleSize.scale(mWindowSize*13, Qt::KeepAspectRatio);
|
|
422 |
mMaxScaleDecSize = mItemSize;
|
|
423 |
mMaxScaleDecSize.scale(mWindowSize*7, Qt::KeepAspectRatio);
|
|
424 |
mMinScaleSize = mItemSize* 0.7;
|
|
425 |
mMinDecScaleSize = mItemSize;
|
58
|
426 |
mCurrentSize = mItemSize;
|
43
|
427 |
mZoomItem->setPixmap(targetPixmap);
|
|
428 |
finalizeWidgetTransform();
|
|
429 |
}
|
|
430 |
}
|
|
431 |
}
|
|
432 |
|
45
|
433 |
void GlxZoomWidget::modelDestroyed()
|
|
434 |
{
|
|
435 |
mModel = NULL ;
|
|
436 |
}
|
|
437 |
|
|
438 |
void GlxZoomWidget::indexChanged()
|
|
439 |
{
|
|
440 |
retreiveFocusedImage();
|
|
441 |
}
|
|
442 |
|
43
|
443 |
void GlxZoomWidget::decodedImageAvailable()
|
|
444 |
{
|
|
445 |
//new bitmap with better resolution is available
|
|
446 |
//so set it to the item
|
|
447 |
QPixmap decodedPixmap = mImageDecoder->getPixmap();
|
|
448 |
disconnect(mImageDecoder, SIGNAL(pixmapDecoded()), this, SLOT(decodedImageAvailable()));
|
|
449 |
if(decodedPixmap.isNull()){
|
|
450 |
return;
|
|
451 |
}
|
|
452 |
mDecodedImageAvailable = true;
|
|
453 |
mZoomItem->setPixmap(decodedPixmap);
|
|
454 |
mItemSize = decodedPixmap.size();
|
|
455 |
//this is important if not done then old transforms will be applied on the new image
|
|
456 |
finalizeWidgetTransform();
|
|
457 |
}
|
|
458 |
|
|
459 |
void GlxZoomWidget::sendDecodeRequest(int index)
|
|
460 |
{
|
|
461 |
if(!mImageDecodeRequestSend) {
|
|
462 |
QString imagePath = (mModel->data(mModel->index(index,0),GlxUriRole)).value<QString>();
|
|
463 |
mImageDecoder->decodeImage(imagePath);
|
|
464 |
connect(mImageDecoder, SIGNAL(pixmapDecoded()), this, SLOT(decodedImageAvailable()));
|
|
465 |
mImageDecodeRequestSend = true;
|
|
466 |
}
|
|
467 |
}
|
|
468 |
|
|
469 |
|
|
470 |
void GlxZoomWidget::finalizeWidgetTransform()
|
|
471 |
{
|
|
472 |
QPointF widgetPos = mZoomWidget->sceneTransform().map(QPointF(0,0)); //Map the origin wrt scene
|
|
473 |
mZoomWidget->resetTransform();
|
|
474 |
mZoomWidget->scale(mCurrentSize.width()/mItemSize.width(), mCurrentSize.height()/mItemSize.height());
|
|
475 |
mZoomWidget->setGeometry(QRectF(widgetPos , mCurrentSize));
|
|
476 |
// this updates HbScrollArea on the sizeHint of ZoomWidget
|
|
477 |
mZoomWidget->setPreferredSize(mCurrentSize);
|
|
478 |
mStepCurrentSize = mCurrentSize;
|
|
479 |
}
|
|
480 |
|
|
481 |
QPixmap GlxZoomWidget::getFocusedImage()
|
|
482 |
{
|
|
483 |
mFocusIndex = mModel->data(mModel->index(0,0),GlxFocusIndexRole).value<int>();
|
|
484 |
QVariant iconVariant = mModel->data(mModel->index(mFocusIndex,0),GlxFsImageRole);
|
|
485 |
QVariant sizeVariant = mModel->data(mModel->index(mFocusIndex,0),GlxDimensionsRole);
|
|
486 |
QPixmap targetPixmap;
|
|
487 |
//retreive pixmap from the HbIcon received from model
|
|
488 |
//should change the model to return and save pixmaps and convert to HbIcons Instead
|
|
489 |
if ( iconVariant.isValid() && iconVariant.canConvert<HbIcon> () ) {
|
|
490 |
QIcon itemIcon = iconVariant.value<HbIcon>().qicon();
|
|
491 |
QSize itemSize = itemIcon.actualSize(mWindowSize);
|
|
492 |
QSize scaleSize;
|
|
493 |
if(sizeVariant.isValid() && sizeVariant.canConvert<QSize> ()) {
|
|
494 |
scaleSize = sizeVariant.toSize();
|
|
495 |
if(!(scaleSize.width() < mWindowSize.width() && scaleSize.height() < mWindowSize.height())) {
|
|
496 |
scaleSize = mWindowSize;
|
|
497 |
}
|
|
498 |
}
|
|
499 |
targetPixmap = itemIcon.pixmap(itemSize).scaled(scaleSize, Qt::KeepAspectRatio);
|
|
500 |
mItemSize = targetPixmap.size();
|
|
501 |
}
|
|
502 |
return targetPixmap;
|
|
503 |
|
|
504 |
}
|
|
505 |
|
50
|
506 |
void GlxZoomWidget::setZoomParams()
|
|
507 |
{
|
|
508 |
if (mModel) {
|
|
509 |
QVariant sizeVariant = mModel->data(mModel->index(mFocusIndex,0),GlxDimensionsRole);
|
|
510 |
QSize fsSize;
|
|
511 |
if(sizeVariant.isValid() && sizeVariant.canConvert<QSize> ()) {
|
|
512 |
fsSize = sizeVariant.toSize();
|
|
513 |
if(!(fsSize.width() < mWindowSize.width() && fsSize.height() < mWindowSize.height())) {
|
|
514 |
fsSize.scale( mWindowSize, Qt::KeepAspectRatio);
|
|
515 |
}
|
|
516 |
mMaxScaleSize = fsSize;
|
|
517 |
mMaxScaleSize.scale(mWindowSize*13, Qt::KeepAspectRatio);
|
|
518 |
mMaxScaleDecSize = fsSize;
|
|
519 |
mMaxScaleDecSize.scale(mWindowSize*7, Qt::KeepAspectRatio);
|
|
520 |
mMinScaleSize = fsSize* 0.7;
|
|
521 |
mMinDecScaleSize = fsSize;
|
|
522 |
}
|
|
523 |
}
|
43
|
524 |
|
|
525 |
|
50
|
526 |
}
|
|
527 |
|
43
|
528 |
|
|
529 |
|
|
530 |
void GlxZoomWidget::animateZoomIn(QPointF animRefPoint)
|
|
531 |
{
|
52
|
532 |
if (isFocussedItemCorrupt()){
|
|
533 |
return;
|
|
534 |
}
|
|
535 |
emit pinchGestureReceived(mFocusIndex);
|
|
536 |
//bring the zoom widget to foreground
|
|
537 |
mZoomOngoing = true;
|
|
538 |
setZValue(mMaxZValue);
|
|
539 |
//show the black background
|
|
540 |
mBlackBackgroundItem->setParentItem(parentItem());
|
|
541 |
mBlackBackgroundItem->setZValue(mMaxZValue - 1);
|
|
542 |
mBlackBackgroundItem->show();
|
|
543 |
m_AnimRefPoint = animRefPoint;
|
58
|
544 |
QSizeF requiredSize = mMinDecScaleSize;
|
54
|
545 |
//MAXDTZOOMIN size is set to 3.5 times window size
|
|
546 |
requiredSize.scale(mWindowSize*MAXDTZOOMIN, Qt::KeepAspectRatio);
|
44
|
547 |
m_FinalAnimatedScaleFactor = requiredSize.width()/mMinDecScaleSize.width();
|
54
|
548 |
//initiale variable for double tap animation
|
|
549 |
mIncSF = 1;
|
|
550 |
//preserve the size when zoom out was initiated, requried for calculates applicable/req scale factor
|
|
551 |
//SF has to always greater than 1 for upscaling, hence range for zoomout is [1,m_FinalAnimatedScaleFactor]
|
58
|
552 |
msfInc = (m_FinalAnimatedScaleFactor-1)/(NOOFSTEPSZI);
|
|
553 |
//preserve the size when zoom out was initiated, requried for calculates applicable/req scale factor
|
|
554 |
minitSize = mCurrentSize;
|
54
|
555 |
//set the no. of steps for double tap animation
|
58
|
556 |
mdoubletapSteps = NOOFSTEPSZI;
|
54
|
557 |
animateDoubleTap();
|
43
|
558 |
|
|
559 |
}
|
|
560 |
void GlxZoomWidget::animateZoomOut(QPointF animRefPoint)
|
|
561 |
{
|
54
|
562 |
m_AnimRefPoint = animRefPoint;
|
|
563 |
//Zoom out to FS (mMinDecScaleSize) from the currentsize
|
|
564 |
m_FinalAnimatedScaleFactor = mMinDecScaleSize.width()/mCurrentSize.width();
|
|
565 |
//initiale variable for double tap animation
|
|
566 |
mIncSF = 1;
|
|
567 |
//calculate the step increment SF for each step
|
58
|
568 |
msfInc = (1 - m_FinalAnimatedScaleFactor)/(NOOFSTEPSZO);
|
54
|
569 |
//preserve the size when zoom out was initiated, requried for calculates applicable/req scale factor
|
58
|
570 |
minitSize = mCurrentSize;
|
54
|
571 |
//set the no. of steps for double tap animation
|
|
572 |
//AA:: the no.of steps are kept the same for zoomin/zoomout, however tweaking them can be considered
|
58
|
573 |
mdoubletapSteps = NOOFSTEPSZO;
|
54
|
574 |
animateDoubleTap();
|
|
575 |
//AA
|
|
576 |
|
43
|
577 |
}
|
54
|
578 |
|
43
|
579 |
|
54
|
580 |
void GlxZoomWidget::animateDoubleTap()
|
|
581 |
{
|
|
582 |
//calculate increamental scale factor based on the step and then calculate the applicable scale factor this step
|
|
583 |
//increamental SF works on the ImageSize when double tap started, applicable(required) SF calculates the delate SF
|
|
584 |
if(m_FinalAnimatedScaleFactor > 1) {
|
|
585 |
//AA::zoomin case
|
|
586 |
mIncSF += msfInc;
|
58
|
587 |
qreal reqSF = (minitSize.width()*(mIncSF))/mCurrentSize.width();
|
54
|
588 |
zoomImage(reqSF, m_AnimRefPoint);
|
|
589 |
}
|
|
590 |
if(m_FinalAnimatedScaleFactor < 1) {
|
|
591 |
//AA::zoomout case
|
|
592 |
mIncSF -= msfInc;
|
58
|
593 |
qreal reqSF = (minitSize.width()* mIncSF)/mCurrentSize.width();
|
54
|
594 |
zoomImage(reqSF, m_AnimRefPoint);
|
|
595 |
}
|
|
596 |
//check if all steps are done,if not emit signal to continue the animation
|
58
|
597 |
if(mdoubletapSteps > 1 ){
|
54
|
598 |
mdoubletapSteps -= 1;
|
|
599 |
emit stepZoom();
|
|
600 |
}
|
|
601 |
else {
|
|
602 |
//animation is complete, finalize the widget transform using setgeometry
|
|
603 |
//reset the counter
|
|
604 |
mdoubletapSteps = 0;
|
|
605 |
animationTimeLineFinished();
|
|
606 |
}
|
|
607 |
|
|
608 |
}
|
43
|
609 |
void GlxZoomWidget::animationTimeLineFinished()
|
|
610 |
{
|
|
611 |
finalizeWidgetTransform();
|
|
612 |
//push the Zoom widget to background when zoomed image size nears FS image
|
|
613 |
if(mStepCurrentSize.width() <= mMinDecScaleSize.width()*1.3) {
|
|
614 |
mBlackBackgroundItem->hide();
|
|
615 |
//push the widget back to background
|
|
616 |
setZValue(mMinZValue);
|
50
|
617 |
mZoomOngoing = false;
|
43
|
618 |
emit zoomWidgetMovedBackground(mFocusIndex);
|
|
619 |
//do not reset the transform here as it will then zoom-in the widget to decoded image size
|
|
620 |
}
|
|
621 |
}
|
|
622 |
|
44
|
623 |
|
|
624 |
void GlxZoomWidget::timerEvent(QTimerEvent *event)
|
|
625 |
{
|
|
626 |
if(mTimerId == event->timerId())
|
|
627 |
{
|
|
628 |
killTimer(mTimerId);
|
|
629 |
mTimerId = 0;
|
|
630 |
}
|
58
|
631 |
else {
|
|
632 |
HbScrollArea::timerEvent( event );
|
|
633 |
}
|
44
|
634 |
}
|
52
|
635 |
|
|
636 |
bool GlxZoomWidget::isFocussedItemCorrupt()
|
|
637 |
{
|
|
638 |
QVariant variant = mModel->data( mModel->index( mFocusIndex, 0 ), GlxImageCorruptRole );
|
|
639 |
if ( variant.isValid() && variant.canConvert< bool> () ) {
|
|
640 |
return variant.value< bool > () ;
|
|
641 |
}
|
|
642 |
return false ;
|
|
643 |
}
|
|
644 |
|