1 /*

     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  anchor layoutmanager private implementation header.

    15 *

    16 */

    17 

    18 

    19 #ifndef ALFANCHORLAYOUTMANAGERIMPL_H

    20 #define ALFANCHORLAYOUTMANAGERIMPL_H

    21 

    22 #include <osn/osndefines.h>

    23 #include <alf/alfanchorlayoutmanager.h>

    24 #include <alf/ialflayoutpreferences.h>

    25 

    26 using std::auto_ptr;

    27 using Alf::AlfAnchorLayoutManager;

    28 

    29 class CAlfControl;

    30 class CAlfAnchorLayout;

    31 

    32 namespace Alf

    33     {

    34     

    35 class CAlfWidgetControl;

    36 class AlfWidget;

    37 class IAlfLayoutPreferences;

    38     

    39 /**

    40  * layoutmanager implementation class

    41  *

    42  * @lib alfwidgetmodel.lib

    43  * @since S60 ?S60_version

    44  */

    45 class AlfAnchorLayoutManagerImpl : public IAlfLayoutPreferences

    46     {

    47 public:

    48     /**

    49      * layout manager constructor

    50      *

    51      * @param aLayoutType type of layout used by the manager.

    52      */

    53     AlfAnchorLayoutManagerImpl(AlfAnchorLayoutManager& aAnchorLayoutManager);

    54     

    55     /**

    56      * destructor

    57      */

    58     ~AlfAnchorLayoutManagerImpl();

    59     

    60 public:

    61 // from base class IAlfLayoutPreferences

    62 

    63 	/**

    64 	 * Returns the minimum size of the layout by combining the minimum sizes of the

    65 	 * layed out visuals.

    66 	 * 

    67 	 * @param aMinSize The minimum size that the object would like to be laid out to

    68 	 * @return false iff none of the layed out UI elements do not care about minimum size

    69 	 */

    70 	virtual bool getMinimumSize( TAlfXYMetric& aMinSize ) const;

    71 	

    72 	/**

    73 	 * Returns the maximum size of the layout by combining the maximum sizes of the

    74 	 * layed out visuals.

    75 	 *  

    76 	 * @param aMaxSize The maximum size that the object would like to be laid out to

    77 	 * @return false iff none of the layed out UI elements do not care about maximum size

    78 	 */

    79 	virtual bool getMaximumSize( TAlfXYMetric& aMaxSize ) const;

    80 	

    81     /**

    82      * Returns the size combined by all preferred sizes of child UI elements in this layout 

    83      * when they are being layed out according to the layout manager rules.

    84      * 

    85      * @param aPreferredSize Filled with the referred area occupied by child elements when

    86      * 						 layed out by layouting rules in this layout manager.

    87      * @return False if none of the child components report their preferred size. True

    88      * 		   otherwise.

    89      */

    90     virtual bool getPreferredSize(TAlfXYMetric& aPreferredSize) const;

    91 	 

    92 	/**

    93 	 * Set the preferred size into a presentation object.

    94 	 * 

    95 	 * This is not supported on the layout manager. Users should set preferred sizes of the

    96 	 * contained UI elements.

    97 	 */

    98 	virtual void setPreferredSize( const TAlfXYMetric& aPreferredSize );    

    99 

   100 public:

   101 // from base class IAlfInterfaceBase

   102     

   103     /**

   104      * Interface getter. 

   105      * @see IAlfInterfaceBase::MakeInterface

   106      *

   107      * @since S60 ?S60_version

   108      * @param aType The type id of the queried interface.

   109      * @return The queried interface, or NULL if the interface is not

   110      *         supported or available.

   111      */    

   112     virtual IAlfInterfaceBase* makeInterface( const IfId& aType );	

   113 	

   114 private:

   115     /**

   116      * returns the anchorlayout used by the layoutmanager.

   117      */    

   118     CAlfAnchorLayout& layout() const;

   119 private:

   120 

   121     AlfAnchorLayoutManager & mAnchorLayoutManager;

   122 

   123     };

   124 

   125     } // namespace Alf

   126 

   127 #endif // ALFANCHORLAYOUTMANAGERIMPL_H