author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:45:44 +0200 | |
changeset 0 | 4e91876724a2 |
child 25 | 191387a8b767 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 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: Media List Command Handler |
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* |
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*/ |
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#ifndef __C_GLXMEDIALISTCOMMANDHANDLER_H |
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#define __C_GLXMEDIALISTCOMMANDHANDLER_H |
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#include "glxcommandhandler.h" |
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#include <e32base.h> |
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#include <mpxcollectionobserver.h> |
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#include <mpxmediageneraldefs.h> |
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#include <mglxmedialistobserver.h> |
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class MGlxMediaList; |
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class CAknProgressDialog; |
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class MGlxMediaListProvider; |
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class CEikProgressInfo; |
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class UT_CGlxMediaListCommandHandler; |
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class t_cglxcommandhandlercopytohomenetwork; |
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/** |
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* @class CGlxMediaListCommandHandler |
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* |
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* Command handler that acts on a media list. This class handles basic |
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* and most common command filtering, i.e., checking whether the |
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* command is active based on a selection |
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* |
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* @ingroup glx_group_command_handlers |
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* |
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* Filters: |
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* - Disable if selection contains only system items (see @ref glx_colifspec_medial) |
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* - This allows disabling commands that are not allowed for system items (such as favourites album) |
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* - Disable if selection size is too small or too large |
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* - This allows filtering out an empty view (except for marking commands) |
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* - This allows filtering out static items (except for marking commands) |
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* - This allows filtering when other than 1 item has been selected |
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* - Use case: rename item, and play video |
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* - Disable for static item |
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* - This can be achieved by setting minimum selection lenght to 1 (or more), since |
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* static items are not part of selection |
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* - Specific static item disabling should only be required when dealing with marking commands, |
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* since static items do not belong to the selection. There is a selection, |
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* all commands (except marking commands) act on the selected items. If nothing |
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* is selected, focus is treated as selection. If nothing is selected, and |
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* a static item is focused, selection size will be 0. |
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* Hence, it is faster and simpler to use selection size min and max to filter out |
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* static items. |
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* - Disabling when view is empty can be achieved via min and max selection length, except |
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* for marking commands, which need to if view is empty: |
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* - (Mark all and Mark multiple need to be available also when there is no selection |
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* zero and focus is on a static item, but not if the view is empty, hence a |
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* separate check for empty view is needed for marking.) |
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* - Disable if system item |
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* - Disable by item type: Image/video/static item/album/tag |
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* - Use case: Filter out static items for marking command handler |
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* |
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* @lib glxviewbase.lib |
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*/ |
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class CGlxMediaListCommandHandler : public CGlxCommandHandler |
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{ |
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public: |
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/** |
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* Command info. Represents one command id. |
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* Command is enabled by default, unless member variables are modified |
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*/ |
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struct TCommandInfo |
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{ |
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/** |
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* Constructor that sets all filters not to apply, so |
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* command is enabled by default |
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*/ |
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IMPORT_C TCommandInfo(TInt aCommandId); |
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/// Supported command id |
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TInt iCommandId; |
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/// Stop GIF animation before execution |
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TBool iStopAnimationForExecution; |
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/// Disable command if only system items in selection |
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TBool iDisallowSystemItems; |
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/// Disable command if only DRM-protected items in selection |
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TBool iDisallowDRM; |
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/// Disable command if selection smaller than. Default 0. |
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TInt iMinSelectionLength; |
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/// Disable command if selection larger than. Default KMaxTInt. |
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TInt iMaxSelectionLength; |
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107 |
|
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/// Enable only if selected container(s) contains this or more items |
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TInt iMinSlideshowPlayableContainedItemCount; |
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110 |
|
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/// Filter out animated GIFs |
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TBool iDisallowAnimatedGIFs; |
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113 |
|
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/// Disable if <b>focused</b> item is / is not of the category |
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/// See @ref CGlxMediaListCommandHandler::iCategoryRule |
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/// Default is EMPXNoCategory |
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TMPXGeneralCategory iCategoryFilter; |
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118 |
|
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/// If ETrue, |
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/// If EFalse, disables command if all items ARE of category |
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/// Default |
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/// See @ref CGlxMediaListCommandHandler::iCategoryFilter |
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enum TCategoryRule |
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{ |
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EIgnore, // Ignore category |
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ERequireAll, // disables command if all items are NOT of category |
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EForbidAll // disables command if all items ARE of category |
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}; |
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TCategoryRule iCategoryRule; |
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130 |
|
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/// Viewing Statws. Used to filter what commands are on display |
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/// relative to Browsing or Viewing |
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/// These are bitwise to enable a command to declare more than |
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/// one state at a time. |
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enum TViewingState |
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{ |
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EViewingStateUndefined = 0xFFFFFFFF, |
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EViewingStateBrowse = 0x01, // Tile View |
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EViewingStateView = 0x02 // Full Screen view |
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}; |
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|
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// Records the current viewing state |
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TViewingState iViewingState; |
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}; |
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145 |
|
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146 |
public: |
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/** |
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* Destructor |
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*/ |
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IMPORT_C virtual ~CGlxMediaListCommandHandler(); |
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|
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/** |
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* Constructor |
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* @param aMediaListProvider The owner of the media list to use |
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*/ |
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IMPORT_C CGlxMediaListCommandHandler( MGlxMediaListProvider* aMediaListProvider, |
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TBool aIsToolbarCommand = EFalse ); |
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|
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public: // From MGlxCommandHandler |
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/// See @ref MGlxCommandHandler::ExecuteL */ |
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IMPORT_C virtual TBool ExecuteL(TInt aCommand); |
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162 |
|
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/// See @ref MGlxCommandHandler::DynInitMenuPaneL */ |
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IMPORT_C virtual void DynInitMenuPaneL(TInt aResourceId, CEikMenuPane* aMenuPane); |
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165 |
|
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/** |
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* See @ref MGlxCommandHandler::Deactivate |
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* Default implementation does nothing |
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*/ |
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IMPORT_C virtual void Deactivate(); |
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|
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/** |
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* See @ref MGlxCommandHandler::OfferKeyEventL |
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* Default implementation does nothing |
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*/ |
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IMPORT_C virtual TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent, TEventCode aType); |
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|
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/** |
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* See @ref MGlxCommandHandler::PreDynInitMenuPaneL |
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* Default implementation does nothing |
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* @param aResourceId Menu resource id. |
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*/ |
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IMPORT_C virtual void PreDynInitMenuPaneL( TInt aResourceId ); |
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|
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/** |
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* See @ref MGlxCommandHandler::GetRequiredAttributesL |
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*/ |
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IMPORT_C void GetRequiredAttributesL(RArray< TMPXAttribute >& aAttributes, |
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TBool aFilterUsingSelection, |
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TBool aFilterUsingCommandId, |
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TInt aCommandId = 0) const; |
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|
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protected: |
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/** |
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* Execute the command, if applicable. Called after basic filtering |
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* @param aCommand The command to handle |
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* @return ETrue iff command was handled |
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* @see BypassFiltersForExecute |
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*/ |
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virtual TBool DoExecuteL(TInt aCommandId, MGlxMediaList& aList) = 0; |
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|
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/** |
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* See @ref CGlxCommandHandler::DoActivateL |
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* Default implementation does nothing |
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*/ |
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IMPORT_C virtual void DoActivateL( TInt aViewId ); |
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/** |
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* Check if command is disabled. Allows deriving class to provide |
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* more elaborate filtering that supported by this class. |
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* Default implementation returns EFalse. |
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* @return ETrue if command is disabled |
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*/ |
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IMPORT_C virtual TBool DoIsDisabled(TInt aCommandId, MGlxMediaList& aList) const; |
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/** |
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* Allow deriving classes to make any further alterations to the menu pane. |
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* Only called on classes with at least on enabled command present in menu |
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* @param aResourceId The resource ID of the menu |
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* @param aMenuPane The in-memory representation of the menu pane |
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* @see BypassFiltersForMenu |
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*/ |
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IMPORT_C virtual void DoDynInitMenuPaneL(TInt aResourceId, CEikMenuPane* aMenuPane); |
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/** |
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* If deriving class returns true for this, ALL commands will be sent to DoExecuteL |
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* @return Whether to bypass filters for command execution |
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*/ |
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IMPORT_C virtual TBool BypassFiltersForExecute() const; |
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/** |
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* If deriving class returns true for this, ALL menus will be passed to DoDynInitMenuPaneL |
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* @return Whether to bypass filters for menu initialization |
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*/ |
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IMPORT_C virtual TBool BypassFiltersForMenu() const; |
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/** |
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* Optionally implemented by deriving classes to specify attributes that should be retrieved |
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* @param aAttributes array to append attributes to. |
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* @param aFilterUsingSelection If ETrue, the deriving class should only append |
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* attributes relevant to the current selection, If EFalse all attributes |
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* should be appended. |
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*/ |
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IMPORT_C virtual void DoGetRequiredAttributesL( RArray<TMPXAttribute>& aAttributes, TBool aFilterUsingSelection) const; |
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protected: |
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/** |
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* Returns a reference to the current media list |
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* @return reference to the current media list |
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*/ |
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IMPORT_C MGlxMediaList& MediaList(); |
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/** |
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* Returns a const reference to the current media list |
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* @return const reference to the current media list |
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*/ |
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IMPORT_C const MGlxMediaList& MediaList() const; |
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/** |
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* AddCommandL |
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*/ |
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IMPORT_C void AddCommandL(const TCommandInfo& aCommand); |
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/** |
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* Check if the command handler is currently disabled |
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*/ |
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IMPORT_C TBool IsDisabledL(TInt aCommandId, MGlxMediaList& aList) const; |
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/** |
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* @return ETrue if command is handled by this command handler |
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*/ |
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IMPORT_C TBool IsSupported(TInt aCommandId) const; |
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/** |
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* @return the length of selection |
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* If static item is focused, length is 0 |
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* If list is empty, lenght is 0 |
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* If no items are selected, but a non-static item is focused length is 1 |
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*/ |
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IMPORT_C TInt SelectionLength() const; |
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/** |
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* @return command info by index |
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*/ |
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IMPORT_C TCommandInfo& CommandInfo(TInt aIndex); |
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/** |
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* @return the current viewing state. |
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*/ |
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IMPORT_C TCommandInfo::TViewingState ViewingState() const; |
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/** |
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* @return command info by index |
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*/ |
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const TCommandInfo& CommandInfo(TInt aIndex) const; |
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private: |
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/** |
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* @return index of command in command info array or KErrNotFound |
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*/ |
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TInt CommandInfoIndex(TInt aCommandId) const; |
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/** |
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* Check if a given command (menu option) is viewable in the current view |
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* @param aInfo The command in question. |
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* @return ETrue if viewable, EFalse if not. |
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*/ |
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TBool IsViewable(const TCommandInfo& aInfo) const; |
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/** |
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* Checks to see if the command handler is disabled |
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* based on the selection and IsViewable(). Other |
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* conditions may also disable the command handler. |
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* @param aInfo The command in question. |
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* @return ETrue, if the command handler is disabled |
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* EFalse if the command handler may not be disabled. |
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*/ |
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TBool IsDisabled(const TCommandInfo& aInfo) const; |
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/** |
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* Append required attributes to aAttributes |
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* @param aAttributes array to append attributes to. |
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* @param aFilterUsingSelection If ETrue, the deriving class should only append |
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* attributes relevant to the current selection, If EFalse all attributes |
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* should be appended. |
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*/ |
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void GetRequiredAttributesL(RArray< TMPXAttribute >& aAttributes, |
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TBool aFilterUsingSelection) const; |
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private: |
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/** Provider of media list */ |
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MGlxMediaListProvider* iMediaListProvider; |
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/** Command info array */ |
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RArray<TCommandInfo> iCommandInfoArray; |
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/** Current viewing state */ |
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TCommandInfo::TViewingState iCurrentViewingState; |
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friend class UT_CGlxMediaListCommandHandler; |
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friend class t_cglxcommandhandlercopytohomenetwork; |
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}; |
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#endif // __C_GLXMEDIALISTCOMMANDHANDLER_H |