camerauis/cameraxui/cxengine/tsrc/unit/system_include/thumbnailmanager_qt.h
changeset 19 d9aefe59d544
child 37 64817133cd1d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraxui/cxengine/tsrc/unit/system_include/thumbnailmanager_qt.h	Fri Apr 16 14:51:30 2010 +0300
@@ -0,0 +1,90 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: copy of normally used "system" file for thumbnailmanager for qt
+*
+*/
+
+#ifndef THUMBNAILMANAGER_QT_H
+#define THUMBNAILMANAGER_QT_H
+
+#include <qobject>
+#include <QPixmap.h>
+#include <QStringList>
+
+
+class  ThumbnailManager : public QObject
+    {
+    Q_OBJECT
+
+public:
+
+    /**
+     * Constructor
+     * 
+     * @param parentPtr parent
+     */    
+    ThumbnailManager( QObject* parentPtr = NULL );
+
+    /**
+     * Destructor
+     */
+    virtual ~ThumbnailManager();
+
+    /**
+     * Get a thumbnail for an object file. If a thumbnail already exists, it
+     * is loaded and if a thumbnail does not exist, it is created
+     * transparently. If thumbnail loadinf fails thumbnailReady signal is emited 
+     * with null pixmap and error code.
+     *
+     * @param fileName      Source object or file
+     * @param clientData    Pointer to arbitrary client data.
+     *                      This pointer is not used by the API for
+     *                      anything other than returning it in the
+     *                      ThumbnailReady signal.
+     * @param priority      Priority for this operation
+     * @return              Thumbnail request ID or -1 if request failed. This can be used to
+     *                      cancel the request or change priority.
+     *                      The ID is specific to this tnm
+     *                      instance and may not be shared with other
+     *                      instances.
+     */
+    int getThumbnail(const QString& fileName, void * clientData = NULL, 
+            int priority = 0);
+
+    /**
+     * Cancel a thumbnail operation.
+     *
+     * @param id      Request ID for the operation to be cancelled.
+     * @return         true if cancelling was successful.
+     */
+    bool cancelRequest(int id);
+
+   
+signals:  
+    /**
+     * Final thumbnail bitmap generation or loading is complete.
+     *
+     * @param pixmap     An object representing the resulting thumbnail.
+     * @param clientData Client data
+     * @param id         Request ID for the operation
+     * @param errorCode  error code
+     */
+    void thumbnailReady( QPixmap , void * , int , int );    
+
+private:
+    int mCurrentThumbnailId;
+    QList<int> mThumbnailManagerIds;
+};
+
+#endif // THUMBNAILMANAGER_QT