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:  flowlayoutmanager implementation

    15 *

    16 */

    17 

    18 

    19 #include <alf/alfexceptions.h>

    20 #include <alf/alfwidgetcontrol.h>

    21 #include <alf/alfflowlayoutmanager.h>

    22 #include <osn/ustring.h>

    23 #include <osn/osnnew.h>

    24 

    25 #include "alfflowlayoutpolicyimpl.h"

    26 #include "alfflowlayoutpreferencesimpl.h"

    27 

    28 using osncore::UString;

    29 

    30 using namespace Alf;

    31 

    32 namespace Alf

    33     {

    34 

    35 // ======== MEMBER FUNCTIONS ========

    36 

    37 // ---------------------------------------------------------------------------

    38 // layout manager constructor

    39 // ---------------------------------------------------------------------------

    40 //

    41 OSN_EXPORT AlfFlowLayoutManager::AlfFlowLayoutManager() 

    42     : AlfLayoutManager(EAlfLayoutTypeFlow)

    43     {

    44     mData.reset(new (EMM) AlfFlowLayoutPolicyImpl(*this));

    45     mPrefImpl.reset(new (EMM) AlfFlowLayoutPreferencesImpl(*this));

    46     }

    47         

    48 // ---------------------------------------------------------------------------

    49 // virtual destructor

    50 // ---------------------------------------------------------------------------

    51 //

    52 OSN_EXPORT AlfFlowLayoutManager::~AlfFlowLayoutManager()

    53     {

    54     }

    55     

    56 // ---------------------------------------------------------------------------

    57 // from AlfLayoutManager

    58 // notifies the layout manager, that the child control's layout

    59 // must be updated.

    60 // ---------------------------------------------------------------------------

    61 //

    62 OSN_EXPORT void AlfFlowLayoutManager::updateChildLayout(

    63     CAlfWidgetControl* aControl)

    64     {

    65     CAlfLayout& layout = getLayout();

    66     doUpdateChildLayout(aControl);

    67     layout.UpdateChildrenLayout();

    68 

    69     //doUpdateChildLayout changes the visual size and position.

    70     //need to notify the widget that size and position has changed. 

    71     //for aControl both the size and position might have changes.

    72     //Only the position changes for all the controls after aControl. 

    73     

    74     //set the size and postion for aControl

    75     TAlfRealRect rect;

    76     if (controlRect(*aControl, rect)) //returns the real rect (of the root visual)

    77         {

    78         setControlRect(*aControl, rect);

    79         }

    80     

    81     //update the position for controls after aControl in layout.

    82     const int childrenCount = count();

    83     bool childControlFound = false;

    84     

    85     for (int i = 0; i < childrenCount; i++)

    86         {

    87         CAlfWidgetControl* child = getControl(i);

    88         

    89         if (childControlFound && controlRect(*child, rect))

    90             {

    91             setControlPosition(*child, rect.iTl);

    92             }

    93         else if (child == aControl)

    94             {

    95             childControlFound = true;

    96             }

    97         }

    98     

    99     // Inform parent layout manager about the changed presentation size

   100     owner().updateParentLayout();

   101     }

   102 

   103 // ---------------------------------------------------------------------------

   104 // From class IAlfInterfaceBase.

   105 // Getter for interfaces provided by the element.

   106 // ---------------------------------------------------------------------------

   107 //

   108 OSN_EXPORT IAlfInterfaceBase* AlfFlowLayoutManager::makeInterface( 

   109     const IfId& aType )

   110     {

   111     UString param(aType.mImplementationId);

   112     IAlfInterfaceBase* ret = 0;

   113     

   114     ret = mData->makeInterface(aType);

   115     if (!ret)

   116         {

   117         ret = mPrefImpl->makeInterface(aType);

   118         }

   119     if (!ret)

   120         {

   121         ret = AlfLayoutManager::makeInterface(aType);

   122         }

   123         

   124     return ret;

   125     }

   126     

   127     } // Alf

   128