109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/* Copyright (c) 2012 Research In Motion Limited.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "netimagetracker.h"
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#include <bb/cascades/ImageTracker>
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using namespace bb;
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using namespace bb::cascades;
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NetImageTracker::NetImageTracker(QObject *parent) :
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ImageTracker(parent), mManager(0)
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{
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mIsCreated = false;
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connect(this, SIGNAL(creationCompleted()), this, SLOT(onCreationCompleted()));
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}
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void NetImageTracker::onCreationCompleted()
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{
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mIsCreated = true;
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if (!mSource.isEmpty() && mManager) {
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// Once creation of the tracker has completed, the lookup of the image is ready to
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// be executed. If the tracker is used within a list item this lookup is not needed
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// since the update of list item data will enforce a refresh of the imageSource that
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// will perform the lookup. But for the tracker to work in ImageViews that are not
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// part of a list item we need this here.
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mManager->lookUpImage(mSource);
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}
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}
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void NetImageTracker::onImageReady(const QString filePath, const QString imageName)
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{
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// The NetImageManager will emit a signal to all NetImageTrackers, make sure the
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// image that is ready belongs to this tracker.
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if (imageName.compare(mSource) == 0) {
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if (imageName.compare("loading") == 0) {
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// If we don't have an image to display, let's display a loading image
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QUrl url = QUrl("asset:///icons/ic_doctype_picture.png");
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setImageSource(url);
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} else {
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// Set the path to the image that is now downloaded and cached in the data folder on the device.
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QUrl url = QUrl(filePath);
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setImageSource(url);
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}
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}
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}
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void NetImageTracker::setSource(const QString source)
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{
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if (!source.isEmpty() && mSource.compare(source) != 0) {
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mSource = source;
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if (mManager) {
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// If a manger has been set make a request to look up the image. Otherwise
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// the request is delayed to onCreationCompleted or at the next time a call
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// to set the source is made.
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mManager->lookUpImage(mSource);
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} else {
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qWarning()
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<< "This NetImageTracker does not have any NetImageManager, set up one as an attached object and add it to the property.";
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}
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emit sourceChanged(mSource);
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}
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}
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QString NetImageTracker::source()
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{
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return mSource;
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}
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void NetImageTracker::setManager(NetImageManager *manager)
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{
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if (mManager != manager) {
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// Change the manager that is used for the tracker.
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if (mManager) {
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disconnect(mManager, SIGNAL(imageReady(const QString , const QString )), this,
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SLOT(onImageReady( const QString , const QString )));
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delete (mManager);
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}
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mManager = manager;
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emit managerChanged(mManager);
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connect(mManager, SIGNAL(imageReady(const QString , const QString )), this,
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SLOT(onImageReady( const QString , const QString )));
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}
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}
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NetImageManager *NetImageTracker::manager()
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{
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return mManager;
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}
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