--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widgetmodel/alfwidgetmodel/src/alfgridlayoutpolicyimpl.cpp	Thu Dec 17 08:56:02 2009 +0200
@@ -0,0 +1,206 @@
+/*
+* Copyright (c) 2008 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:  layoutmanager implementation class with focus handling in 1D (next/previous)
+*
+*/
+
+
+#include <alf/ialfwidgetcontrol.h>
+#include <alf/alfvisual.h>
+#include <alf/alfgridlayout.h>
+#include "alf/alfwidget.h"
+#include <alf/alfvisualfactory.h>
+#include <alf/alfexceptions.h>
+#include <alf/ialflayoutpreferences.h>
+#include <osn/osnnew.h>
+
+//stl
+#include <algorithm> //for min & max
+
+#include "alfgridlayoutpolicyimpl.h"
+
+using namespace Alf;
+
+namespace Alf
+    {
+//ifdef to prevent compiler warning: className not used.
+#ifdef ALF_DEBUG_EXCEPTIONS
+static const char* const className = "AlfGridLayoutPolicyImpl";
+#endif
+    
+    
+// ======== MEMBER FUNCTIONS ========
+    
+// ---------------------------------------------------------------------------
+// layoutmanagerimpl constructor
+// ---------------------------------------------------------------------------
+//    
+AlfGridLayoutPolicyImpl::AlfGridLayoutPolicyImpl(
+    AlfGridLayoutManager& aGridLayoutManager) : 
+    mGridLayoutManager(aGridLayoutManager)
+    {
+    }
+    
+// ---------------------------------------------------------------------------
+// creates the layout used by the layoutmanager.
+// ---------------------------------------------------------------------------
+//    
+AlfGridLayoutPolicyImpl::~AlfGridLayoutPolicyImpl()
+    {
+    }
+
+// ---------------------------------------------------------------------------
+// from IAlfGridLayoutPolicy
+// Sets the number and weights of blocks in this grid layout in the direction of the specified
+// dimension. 
+// ---------------------------------------------------------------------------
+void AlfGridLayoutPolicyImpl::fillWeights(gridLayoutDimension aDim, int aCount, const TAlfMetric& aWeight)
+    {
+    CAlfGridLayout& gridLayout = layout();
+    TAlfGridDimension dim = (TAlfGridDimension)aDim;
+    TRAPD(err, gridLayout.FillWeightsL(dim, aCount, aWeight));
+    if(err != KErrNone)
+        {
+        ALF_THROW(AlfVisualException, err, className);
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// from IAlfGridLayoutPolicy
+// Add a new line of blocks to this grid layout at the last position in the direction of the 
+// specified dimension. 
+// ---------------------------------------------------------------------------
+void AlfGridLayoutPolicyImpl::appendWeight(gridLayoutDimension aDim, const TAlfMetric& aWeight)
+    {
+    CAlfGridLayout& gridLayout = layout();
+    TAlfGridDimension dim = (TAlfGridDimension)aDim;
+    TRAPD(err, gridLayout.AppendWeightL(dim, aWeight));
+    if(err != KErrNone)
+        {
+        ALF_THROW(AlfVisualException, err, className);
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// from IAlfGridLayoutPolicy
+// Add a new line of blocks to this grid layout at the specified position in the direciton of 
+// the specified dimension. 
+// ---------------------------------------------------------------------------
+void AlfGridLayoutPolicyImpl::insertWeight(gridLayoutDimension aDim, const TAlfMetric& aWeight, int aPos)
+    {
+    CAlfGridLayout& gridLayout = layout();
+    TAlfGridDimension dim = (TAlfGridDimension)aDim;
+    TRAPD(err, gridLayout.InsertWeightL(dim, aWeight, aPos));
+    if(err != KErrNone)
+        {
+        ALF_THROW(AlfVisualException, err, className);
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// from IAlfGridLayoutPolicy
+// Sets the weight of a specific line of blocks in this grid layout, in the direction of the supplied dimension.
+// ---------------------------------------------------------------------------
+void AlfGridLayoutPolicyImpl::replaceWeight(gridLayoutDimension aDim, const TAlfMetric& aWeight, int aPos)
+    {
+    CAlfGridLayout& gridLayout = layout();
+    TAlfGridDimension dim = (TAlfGridDimension)aDim;
+    TRAPD(err, gridLayout.ReplaceWeightL(dim, aWeight, aPos));
+    if(err != KErrNone)
+        {
+        ALF_THROW(AlfVisualException, err, className);
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// from IAlfGridLayoutPolicy
+// Remove a line of blocks from this grid layout at the specified position in the 
+// specified dimension. 
+// ---------------------------------------------------------------------------
+void AlfGridLayoutPolicyImpl::removeWeight(gridLayoutDimension aDim, int aPos)
+    {
+    CAlfGridLayout& gridLayout = layout();
+    TAlfGridDimension dim = (TAlfGridDimension)aDim;
+    TRAPD(err, gridLayout.RemoveWeightL(dim, aPos));
+    if(err != KErrNone)
+        {
+        ALF_THROW(AlfVisualException, err, className);
+        }
+    }
+
+
+// ---------------------------------------------------------------------------
+// from IAlfGridLayoutPolicy
+// Returns the weight of a specific line of blocks in this grid layout, in the
+// specified dimension. 
+// ---------------------------------------------------------------------------
+TAlfMetric AlfGridLayoutPolicyImpl::weight(gridLayoutDimension aDim, int aPos) const
+    {
+    CAlfGridLayout& gridLayout = layout();
+    TAlfGridDimension dim = (TAlfGridDimension)aDim;
+    TAlfMetric result;
+    TRAPD(err, result = gridLayout.Weight(dim, aPos));
+    if(err != KErrNone)
+        {
+        ALF_THROW(AlfVisualException, err, className);
+        }
+    return result;
+    }
+
+    
+// ---------------------------------------------------------------------------
+// from IAlfGridLayoutPolicy
+// Return the number of lines of blocks in this grid, along the specified dimension
+// ---------------------------------------------------------------------------
+int AlfGridLayoutPolicyImpl::count(gridLayoutDimension aDim) const
+    {
+    CAlfGridLayout& gridLayout = layout();
+    TAlfGridDimension dim = (TAlfGridDimension)aDim;
+    int result(0);
+    TRAPD(err, result = gridLayout.DimensionCount(dim));
+    if(err != KErrNone)
+        {
+        ALF_THROW(AlfVisualException, err, className);
+        }
+    return result;
+    }
+
+
+
+// ---------------------------------------------------------------------------
+// From class IAlfInterfaceBase.
+// Getter for interfaces provided by the element.
+// ---------------------------------------------------------------------------
+//
+IAlfInterfaceBase* AlfGridLayoutPolicyImpl::makeInterface(const IfId& aType)
+    {
+    UString param(aType.mImplementationId);
+    if (param == IAlfGridLayoutPolicy::type().mImplementationId)
+        {
+        return this;
+        }      
+    
+    return NULL;
+    }
+    
+// ---------------------------------------------------------------------------
+// returns the gridlayout used by the layoutmanager
+// ---------------------------------------------------------------------------
+//
+CAlfGridLayout& AlfGridLayoutPolicyImpl::layout() const
+    {
+    return dynamic_cast<CAlfGridLayout&>(mGridLayoutManager.getLayout());
+    }
+
+ } // Alf