author | Sebastian Brannstrom <sebastianb@symbian.org> |
Tue, 15 Jun 2010 14:30:57 +0100 | |
branch | GCC_SURGE |
changeset 26 | ea43e3e86079 |
parent 17 | ffa62e555b02 |
child 22 | a67f74060682 |
permissions | -rw-r--r-- |
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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: Qt interface class to Thumbnail Manager |
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* |
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*/ |
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|
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#ifndef THUMBNAILMANAGER_QT_H |
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#define THUMBNAILMANAGER_QT_H |
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#include <QObject> |
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#include <qpixmap> |
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#include <QImage> |
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#include <QtGlobal> |
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class ThumbnailManagerPrivate; |
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class QString; |
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class QSize; |
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#ifdef TNMQT_DLL |
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# define TNM_EXPORT Q_DECL_EXPORT |
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#else |
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# define TNM_EXPORT Q_DECL_IMPORT |
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#endif |
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/** default priority value */ |
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const int tnmWrapperPriorityIdle = -100; |
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class ThumbnailManager : public QObject |
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{ |
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Q_OBJECT |
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public: |
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|
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/** Thumbnail size. */ |
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enum ThumbnailSize |
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{ |
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/** |
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* Small thumbnail |
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*/ |
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ThumbnailSmall = 0, |
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/** |
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* Medium thumbnail |
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*/ |
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ThumbnailMedium, |
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/** |
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* Large thumbnail |
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*/ |
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ThumbnailLarge |
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}; |
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|
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/** Mode of thumbnail creation. */ |
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enum ThumbnailMode |
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{ |
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/** |
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* Default mode. This means that: |
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* - Thumbnail must be as large as requested (unless the actual object is smaller). |
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* - Smaller thumbnails may be up scaled to desired resolution. |
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* - Aspect ratio is maintained and thumbnails are not cropped. The |
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* resulting thumbnail may smaller in either width or height if |
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* the aspect ratio of the object does not match the aspect ratio |
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* of the requested size. |
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*/ |
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Default = 0, |
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/** |
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* Allow thumbnails which are smaller than requested are. Thumbnail |
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* bitmaps are never up scaled if this flag is set. |
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*/ |
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AllowAnySize = 1, |
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|
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/** |
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* New thumbnail images are not created if this flag is set. Only |
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* existing thumbnails may be returned. If a requested thumbnail does |
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* not exist null pixmap will be returned. |
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*/ |
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DoNotCreate = 2, |
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|
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/** |
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* Thumbnail images are cropped to match requested aspect ratio. If |
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* this mode is set, the size of the resulting thumbnail always |
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* matches the requested size. |
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*/ |
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CropToAspectRatio = 4 |
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}; |
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|
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/** Quality versus speed preference setting */ |
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enum QualityPreference |
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{ |
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/** |
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* Prefer thumbnails in the highest quality possible disregarding |
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* any negative impact on performance. |
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*/ |
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OptimizeForQuality, |
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/** |
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* Get thumbnails as fast as possible, even if |
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* it means lower quality. |
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*/ |
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OptimizeForPerformance |
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}; |
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/** |
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* Constructor |
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* |
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* @param parentPtr parent |
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*/ |
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TNM_EXPORT ThumbnailManager( QObject* parentPtr = NULL ); |
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/** |
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* Destructor |
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*/ |
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TNM_EXPORT ~ThumbnailManager(); |
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/** |
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* Get quality versus performance preference. |
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* |
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* @return quality versus performance preference |
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*/ |
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TNM_EXPORT QualityPreference qualityPreference() const; |
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/** |
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* Set quality versus performance preference. |
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* |
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* @param qualityPreference New quality versus performance preference |
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* value. |
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* @return true on success |
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*/ |
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TNM_EXPORT bool setQualityPreference( QualityPreference qualityPreference ); |
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/** |
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* Get the current desired size for thumbnail bitmaps. |
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* |
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* @return Current desired size for thumbnail bitmaps (in pixels). |
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*/ |
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TNM_EXPORT QSize thumbnailSize() const; |
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/** |
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* Set desired size for thumbnail bitmaps. |
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* |
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* @param thumbnailSize New desired thumbnail size. |
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* @return true on success |
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*/ |
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TNM_EXPORT bool setThumbnailSize( const QSize& thumbnailSize ); |
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/** |
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* Set desired size for thumbnail bitmaps. |
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* |
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* @param thumbnailSize New desired thumbnail size. |
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* @return true on success |
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*/ |
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TNM_EXPORT bool setThumbnailSize( ThumbnailSize thumbnailSize ); |
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/** |
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* Get current mode for thumbnail generation. |
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* |
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* @return Current mode. |
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*/ |
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TNM_EXPORT ThumbnailMode mode() const; |
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/** |
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* Set mode for thumbnail generation. |
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* |
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* @param mode New flags. |
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* @return true on success |
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*/ |
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TNM_EXPORT bool setMode( ThumbnailMode mode ); |
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/** |
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* Get a thumbnail for an object file. If a thumbnail already exists, it |
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* is loaded and if a thumbnail does not exist, it is created |
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* transparently. If thumbnail loadinf fails thumbnailReady signal is emited |
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* with null pixmap and error code. |
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* |
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* @param fileName Source object or file |
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* @param clientData Pointer to arbitrary client data. |
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* This pointer is not used by the API for |
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* anything other than returning it in the |
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* ThumbnailReady signal. |
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* @param priority Priority for this operation |
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* @return Thumbnail request ID or -1 if request failed. This can be used to |
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* cancel the request or change priority. |
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* The ID is specific to this tnm |
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* instance and may not be shared with other |
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* instances. |
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*/ |
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TNM_EXPORT int getThumbnail( const QString& fileName, void * clientData = NULL, |
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int priority = tnmWrapperPriorityIdle ); |
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|
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/** |
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* Get a persistent thumbnail for an object file. If a thumbnail already |
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* exists, it is loaded and if a thumbnail does not exist, it is created |
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* transparently. If thumbnail loading fails thumbnailReady signal is emited |
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* with null pixmap and error code. |
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* |
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* @param thumbnailId Thumbnail ID |
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* @param clientData Pointer to arbitrary client data. |
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* This pointer is not used by the API for |
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* anything other than returning it in the |
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* ThumbnailReady signal. |
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* @param priority Priority for this operation |
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* @return Thumbnail request ID or -1 if request failed. This can be used to |
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* cancel the request or change priority. |
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* The ID is specific to this tnm |
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* instance and may not be shared with other |
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* instances. |
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*/ |
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TNM_EXPORT int getThumbnail( unsigned long int thumbnailId, void * clientData = NULL, |
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int priority = tnmWrapperPriorityIdle ); |
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|
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/** |
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* Set a thumbnail for an object file generated from pixmap delivered. |
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* thumbnailReady() signal will be emited when the operation is complete. |
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* |
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* @param source Pixmap from which the thumbnail will be created |
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* @param fileName file name |
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* @param clientData Pointer to arbitrary client data. |
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* This pointer is not used by the API for |
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* anything other than returning it in the |
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* ThumbnailReady callback. |
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* @param priority Priority for this operation |
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* @return Thumbnail request ID or -1 if request failed. This can be used to |
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* cancel the request or change priority. |
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* |
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*/ |
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TNM_EXPORT int setThumbnail( const QPixmap& source, const QString& fileName, |
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void * clientData = NULL, int priority = tnmWrapperPriorityIdle ); |
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|
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/** |
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* Set a thumbnail for an object file generated from pixmap delivered. |
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* thumbnailReady() signal will be emited when the operation is complete. |
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* |
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* @param source QImage from which the thumbnail will be created |
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* @param fileName file name |
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* @param clientData Pointer to arbitrary client data. |
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* This pointer is not used by the API for |
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* anything other than returning it in the |
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* ThumbnailReady callback. |
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* @param priority Priority for this operation |
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* @return Thumbnail request ID or -1 if request failed. This can be used to |
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* cancel the request or change priority. |
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* |
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*/ |
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TNM_EXPORT int setThumbnail( const QImage& source, const QString& fileName, |
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void * clientData = NULL, int priority = tnmWrapperPriorityIdle ); |
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|
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/** |
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* Delete all thumbnails for a given object. This is an asynchronous |
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* operation, which always returns immediately. |
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* |
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* @param fileName Source file |
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*/ |
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TNM_EXPORT void deleteThumbnails( const QString& fileName ); |
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|
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/** |
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* Delete all thumbnails for a given object. This is an asynchronous |
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* operation, which always returns immediately. |
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* |
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* @param thumbnailId thumbnail id |
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*/ |
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TNM_EXPORT void deleteThumbnails( unsigned long int thumbnailId ); |
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|
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/** |
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* Cancel a thumbnail operation. |
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* |
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* @param id Request ID for the operation to be cancelled. |
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* @return true if cancelling was successful. |
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*/ |
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TNM_EXPORT bool cancelRequest( int id ); |
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|
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/** |
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* Change the priority of a queued thumbnail operation. |
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* |
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* @param id Request ID for the request which to assign a new |
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* priority. |
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* @param newPriority New priority value |
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* @return true if change was successful. |
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*/ |
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TNM_EXPORT bool changePriority( int id, int newPriority ); |
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|
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signals: |
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/** |
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* Final thumbnail bitmap generation or loading is complete. |
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* |
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* @param pixmap An object representing the resulting thumbnail. |
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* @param clientData Client data |
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* @param id Request ID for the operation |
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* @param errorCode error code |
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*/ |
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void thumbnailReady( QPixmap , void * , int , int ); |
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/** |
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* Final thumbnail bitmap generation or loading is complete. |
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* |
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* @param image An object representing the resulting thumbnail. |
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* @param clientData Client data |
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* @param id Request ID for the operation |
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* @param errorCode error code |
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*/ |
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void thumbnailReady( QImage , void * , int , int ); |
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protected: |
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void connectNotify(const char *signal); |
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void disconnectNotify(const char *signal); |
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private: |
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ThumbnailManagerPrivate* d; |
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}; |
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#endif // THUMBNAILMANAGER_QT |