--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/widgetmodel/alfwidgetmodel/src/alfgridlayoutmanagerimpl.cpp Thu Dec 17 08:56:02 2009 +0200
@@ -0,0 +1,193 @@
+/*
+* Copyright (c) 2007 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 "alfgridlayoutmanagerimpl.h"
+
+using namespace Alf;
+
+namespace Alf
+ {
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------------------------
+// layoutmanagerimpl constructor
+// ---------------------------------------------------------------------------
+//
+AlfGridLayoutManagerImpl::AlfGridLayoutManagerImpl(
+ AlfGridLayoutManager& aGridLayoutManager) :
+ mGridLayoutManager(aGridLayoutManager)
+ {
+ }
+
+// ---------------------------------------------------------------------------
+// creates the layout used by the layoutmanager.
+// ---------------------------------------------------------------------------
+//
+AlfGridLayoutManagerImpl::~AlfGridLayoutManagerImpl()
+ {
+ }
+
+// ---------------------------------------------------------------------------
+// from IAlfLayoutPreferences
+// Returns the minimum area that this layout manager can occupy by observing
+// the minimum sizes of the child UI elements in the layout
+// ---------------------------------------------------------------------------
+//
+bool AlfGridLayoutManagerImpl::getMinimumSize( TAlfXYMetric& /*aMinSize*/ ) const
+ {
+ return false;
+ }
+
+// ---------------------------------------------------------------------------
+// from IAlfLayoutPreferences
+// Returns the maximum area that this layout manager can occupy by observing
+// the maximum sizes of the child UI elements in the layout
+// ---------------------------------------------------------------------------
+//
+bool AlfGridLayoutManagerImpl::getMaximumSize( TAlfXYMetric& /*aMaxSize*/ ) const
+ {
+ return false;
+ }
+
+// ---------------------------------------------------------------------------
+// Combines and returns the preferred sizes of all child UI elements according
+// to the layouting rules.
+// ---------------------------------------------------------------------------
+//
+bool AlfGridLayoutManagerImpl::getPreferredSize(TAlfXYMetric& aPreferredSize) const
+ {
+ bool hasPreferredSize = false;
+ TAlfXYMetric resultSize = TAlfXYMetric(TAlfMetric(0), TAlfMetric(0));
+
+ const CAlfGridLayout& gridlayout = layout();
+ const int childCount = mGridLayoutManager.count();
+ const int gridColCount = gridlayout.ColumnCount();
+
+ //iterate the columns to calculate the preferred width.
+ const int colCount = std::min<int>(gridColCount, childCount);
+ for (int i = 0; i < colCount; i++)
+ {
+ CAlfWidgetControl* childWidgetControl = mGridLayoutManager.getControl(i);
+ //getControl may return null, but getLayoutPreferences checks that.
+ const IAlfLayoutPreferences* layoutPrefs =
+ mGridLayoutManager.getLayoutPreferences(childWidgetControl);
+
+ if (layoutPrefs)
+ {
+ TAlfXYMetric prefSize;
+ if (layoutPrefs->getPreferredSize(prefSize))
+ {
+ if(prefSize.iX.iUnit == EAlfUnitPixel)
+ {
+ resultSize.iX.iMagnitude += prefSize.iX.iMagnitude;
+ hasPreferredSize = true;
+ }
+ }
+ }
+ }
+
+ //iterate the rows to calculate the preferred height
+ if (hasPreferredSize)
+ {
+ //count rows, that have at least one visual.
+ int usedRows = childCount / gridColCount;
+ if (childCount % gridColCount)
+ {
+ //last wor not filled completely, but still valid to get preferred height
+ //for this row also.
+ usedRows++;
+ }
+
+ const int rowCount = std::min<int>(gridlayout.RowCount(), usedRows);
+ for (int i = 0; i < rowCount; i+= gridColCount)
+ {
+ CAlfWidgetControl* childWidgetControl = mGridLayoutManager.getControl(i);
+ //getControl may return null, but getLayoutPreferences checks that.
+ const IAlfLayoutPreferences* layoutPrefs =
+ mGridLayoutManager.getLayoutPreferences(childWidgetControl);
+
+ if (layoutPrefs)
+ {
+ TAlfXYMetric prefSize;
+ if (layoutPrefs->getPreferredSize(prefSize))
+ {
+ if(prefSize.iY.iUnit == EAlfUnitPixel)
+ {
+ resultSize.iY.iMagnitude += prefSize.iY.iMagnitude;
+ hasPreferredSize = true;
+ }
+ }
+ }
+ }
+ }
+
+ aPreferredSize = resultSize;
+ return hasPreferredSize;
+ }
+
+// ---------------------------------------------------------------------------
+// from IAlfLayoutPreferences
+// At the moment doesn't do anything since preferred size is being queried
+// from the child UI elements added to this layout manager.
+// ---------------------------------------------------------------------------
+//
+void AlfGridLayoutManagerImpl::setPreferredSize( const TAlfXYMetric& aPreferredSize)
+ {
+ TAlfTimedPoint size((float)aPreferredSize.iX.iMagnitude,(float)aPreferredSize.iY.iMagnitude);
+ layout().SetSize(size);
+ mGridLayoutManager.owner().updateParentLayout();
+ }
+
+// ---------------------------------------------------------------------------
+// From class IAlfInterfaceBase.
+// Getter for interfaces provided by the element.
+// ---------------------------------------------------------------------------
+//
+IAlfInterfaceBase* AlfGridLayoutManagerImpl::makeInterface(const IfId& aType)
+ {
+ UString param(aType.mImplementationId);
+ if (param == IAlfLayoutPreferences::type().mImplementationId)
+ {
+ return this;
+ }
+
+ return NULL;
+ }
+
+// ---------------------------------------------------------------------------
+// returns the gridlayout used by the layoutmanager
+// ---------------------------------------------------------------------------
+//
+CAlfGridLayout& AlfGridLayoutManagerImpl::layout() const
+ {
+ return dynamic_cast<CAlfGridLayout&>(mGridLayoutManager.getLayout());
+ }
+
+ } // Alf