author | Stefan Karlsson <stefan.karlsson@nokia.com> |
Sun, 28 Mar 2010 16:38:10 +0100 | |
branch | CompilerCompatibility |
changeset 9 | 63ff45340ef4 |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2007 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: Layout base class |
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* |
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*/ |
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#ifndef C_ALFGRIDLAYOUT_H |
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#define C_ALFGRIDLAYOUT_H |
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#include <alf/alflayout.h> |
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/* Each dimension corresponds to a different axis for the grid blocks */ |
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enum TAlfGridDimension |
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{ |
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EAlfGridColumn, |
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EAlfGridRow |
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}; |
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/** |
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* These flags specify where pixel error is distributed in grid layout calculations. |
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* |
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* If none of these flags are set, then the pixel positions of all children are calculated |
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* using reals, then floored to the nearest pixel. If, however, the children must all be |
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* the same pixel size, then the following flags can be set. They place extra pixels into |
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* the layout's paddings to make up the difference. |
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* The flags for increasing and decreasing paddings are |
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* mutually exclusive, but you can apply inner and outer padding flags at the same time. This |
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* will result in the error being distributed between inner and outer paddings in the same |
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* proportion as inner to outer padding. Eg: if inner padding is 10 and outer padding is 20, twice |
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* as many error pixels will be distributed to the outer padding. |
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* @see SetLayoutModeFlags |
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*/ |
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enum TAlfGridLayoutModeFlags |
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{ |
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/** Automatically increases innerpaddings if needed. Clears EAlfGridDecreaseInnerPadding if set.*/ |
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EAlfGridIncreaseInnerPadding = 0x1, |
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/** Automatically decreases innerpaddings if needed. Clears EAlfGridIncreaseInnerPadding if set.*/ |
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EAlfGridDecreaseInnerPadding = 0x2, |
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|
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/** Automatically increases outerpaddings if needed. Clears EAlfGridDecreaseOuterPadding if set.*/ |
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EAlfGridIncreaseOuterPadding = 0x4, |
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/** Automatically decreases outerpaddings if needed. Clears EAlfGridIncreaseOuterPadding if set.*/ |
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EAlfGridDecreaseOuterPadding = 0x8, |
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EAlfGridFlagAll = 0xF |
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}; |
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/** |
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* Grid layout class. |
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* |
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* To use this class, a grid layout is created of a desired width and height. |
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* Then, when visuals are added to grid layout, they will populate the grid. |
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* By default, all slots in a grid layout are of a uniform size, but the weighting |
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* of individual rows and columns can be modified, and can be specified using |
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* metric units. |
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* Slots will resize automatically as the grid layout size changes. |
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* |
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* The standard application grid is one example of a grid layout. |
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* |
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* Usage: |
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* |
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* @code |
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* // Create a new 3x4 grid layout visual. |
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* CAlfGridLayout* grid = CAlfGridLayout::AddNewL( control, 3, 4 ); |
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* |
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* // Add a single text visual into the grid. |
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* CAlfTextVisual* text = CAlfTextVisual::AddNewL( control, grid ); |
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* |
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* // Make the text visual visible; if no text is specified, nothing is drawn. |
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* text->SetTextL(_L("T")); |
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* |
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* //Setting grid dimentions with weight |
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* RArry<TInt> col; |
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* col.AppendL( 1 ); |
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* col.AppendL( 2 ); |
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* |
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* //sets no of columns to 2 and width of second column |
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* //is double of that of first |
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* grid->SetColumns( col ); |
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* |
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* @endcode |
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* @lib alfclient.lib |
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* @since S60 v3.2 |
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*/ |
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class CAlfGridLayout : public CAlfLayout |
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{ |
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public: |
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/* Constructors and destructor. */ |
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/** |
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* Construct a new grid layout and give its ownership to a control. |
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* |
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* @note the columns and rows will be initialized with equal unit weights, so that blocks will all share |
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* even proportions of the available area to start with. |
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* @note in order to use a mixture of metric weights, or to set different weights, set rows |
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* and columns to zero when calling this method, then use e.g. @c AppendWeightL to |
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* subsequently populate the weights. |
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* |
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* @param aOwnerControl Owner control. |
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* @param aColumns Number of columns in the grid. |
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* @param aRows Number of rows in the grid. |
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* @param aParentLayout Parent layout for the new grid layout. |
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*/ |
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IMPORT_C static CAlfGridLayout* AddNewL(CAlfControl& aOwnerControl, |
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TInt aColumns, TInt aRows, |
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CAlfLayout* aParentLayout = 0); |
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/** |
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* Constructor. |
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*/ |
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IMPORT_C CAlfGridLayout(); |
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/** |
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* From CAlfLayout. Second-phase constructor. |
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*/ |
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IMPORT_C void ConstructL(CAlfControl& aOwner); |
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/** |
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* Virtual destructor. |
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*/ |
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IMPORT_C ~CAlfGridLayout(); |
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/* Methods. */ |
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/** |
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* Sets amount of columns. |
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* |
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* @param aColumnCount Amount of columns. |
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*/ |
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IMPORT_C void SetColumnsL(TInt aColumnCount); |
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|
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/** |
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* Sets amount of rows. |
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* |
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* @param aRowCount Amount of rows. |
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*/ |
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IMPORT_C void SetRowsL(TInt aRowCount); |
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|
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/** |
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* Sets the number and weights of columns in this grid layout. |
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* The caller specifies an array of relative weights to use for each |
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* column. |
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* Weights can be any integer, ie a column of weight 30 would |
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* be twice the width of a column of weight 15. |
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* |
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* @note this is equivalent to using metrics with unit type EAlfUnitWeight. |
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* |
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* @param aWeights An array containing weights for each column. |
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*/ |
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IMPORT_C void SetColumnsL(const RArray<TInt>& aWeights); |
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|
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/** |
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* Sets the number and weights of rows in this grid layout. |
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* The caller specifies an array of relative weights to use for each |
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* row. |
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* Weights can be any integer, ie a row of weight 30 would |
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* be twice the height of a row of weight 15. |
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* |
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* @note this is the same as using metrics with unit type EAlfUnitWeight. |
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* |
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* @param aWeights An array containing weights for each row. |
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*/ |
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IMPORT_C void SetRowsL(const RArray<TInt>& aWeights); |
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|
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/** |
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* Sets the number and weights of blocks in this grid layout in the direction of the specified |
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* dimension. Each block's weight will be set to equal the supplied value, the result |
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* of which is that all blocks will be equally spaced, whatever the units. |
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* |
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* @since S60 3.2 |
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* |
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* @see @c AppendWeightL for more information on how weights are used to calculate layout positions. |
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* |
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* @note This API could be useful if then subsequent calls to @c ReplaceWeightL are made to |
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* change specific values, depending on how many of the values are different. |
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* @note Calling this with aCount set to 0 will clear all of the existing weights in the direction |
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* of the specified dimension. |
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* @note this is the same as using metrics with unit type EAlfUnitWeight. |
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* |
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* @param aDim the dimension along which to fill |
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* @param aCount The number of lines of blocks to fill |
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* @param aWeight the weights to be used for all blocks |
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*/ |
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IMPORT_C void FillWeightsL(TAlfGridDimension aDim, TInt aCount, const TAlfMetric& aWeight); |
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|
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/** |
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* Add a new line of blocks to this grid layout at the last position in the direction of the |
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* specified dimension. It will have the supplied weight. Weights can be any metric value, |
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* hence different units can be used for each block. In particular, EAlfUnitWeight can be used |
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* to represent weight values in aribtrary proportional units. |
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* |
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* In the case of proportional weights, the effect of this will be to cause the other blocks to |
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* resize according to the new total weight. |
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* |
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* @since S60 3.2 |
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* |
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* @note If non-relative coordinates are specified (e.g., real pixels), the combined blocks might not |
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* fill the entire layout area. However, weights will always stretch to fill all available space |
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* after the fixed units have been determined. Therefore, depending on circumstances it may |
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* be better to use EAlfUnitWeight |
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* @note For example [2 weights, 1 weight, 2 weights] in a layout of 100 pixels would result |
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* in [40 pixels, 20 pixels, 40 pixels]. |
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* @note For example [10 pixels, 1 weight, 15 pixels] in a layout of 100 pixels would result |
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* in [10 pixels, 75 pixels, 15 pixels]. |
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* |
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* @param aDim the dimension to which the weight corresponds |
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* @param aWeight the weight to be used for the block in the specified dimension, |
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* replacing any previously existing weight for that block |
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*/ |
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IMPORT_C void AppendWeightL(TAlfGridDimension aDim, const TAlfMetric& aWeight); |
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|
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/** |
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* Add a new line of blocks to this grid layout at the specified position in the direciton of |
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* the specified dimension. It will have the supplied weight. In the case of proportional |
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* weights, the effect of this will be to cause the other blocks to resize according to the new |
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* total weight. It will also mean that many child visuals will now occupy different blocks within |
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* the grid according to how the blocks wrap. |
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* |
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* @since S60 3.2 |
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* |
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* @see @c AppendWeightL for more information on how weights are used to calculate layout positions. |
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* |
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* @param aDim the dimension to which the weight corresponds |
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* @param aWeight the weight to be used for the block in the specified dimension, |
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* replacing any previously existing weight for that block |
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* @param aPos the index of the block |
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*/ |
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IMPORT_C void InsertWeightL(TAlfGridDimension aDim, const TAlfMetric& aWeight, TInt aPos); |
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|
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/** |
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* Sets the weight of a specific line of blocks in this grid layout, in the direction of the supplied dimension. |
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* In the case of proportional weights, the effect of this will be to cause the |
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* other blocks to resize according to the new total weight. |
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* |
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* @since S60 3.2 |
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* |
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* @see @c AppendWeightL for more information on how weights are used to calculate layout positions. |
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* |
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* @param aDim the dimension to which the weight corresponds |
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* @param aWeight the weight to be used for the block in the specified dimension, |
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* replacing any previously existing weight for that cell |
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* @param aPos the index of the cell |
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*/ |
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IMPORT_C void ReplaceWeightL(TAlfGridDimension aDim, const TAlfMetric& aWeight, TInt aPos); |
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|
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/** |
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* Remove a line of blocks from this grid layout at the specified position in the |
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* specified dimension. In the case of proportional weights, the effect of this will |
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* be to cause the other blocks to resize according to the new total weight. It will also mean |
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* that many child visuals will now occupy different blocks within the grid according to how |
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* the blocks wrap. |
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* |
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* @since S60 3.2 |
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* |
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* @see @c AppendWeightL for more information on how weights are used to calculate layout positions. |
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* |
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* @param aDim the dimension to which the weight corresponds |
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* @param aPos the index of the cell |
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*/ |
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IMPORT_C void RemoveWeightL(TAlfGridDimension aDim, TInt aPos); |
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|
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/** |
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* Returns the weight of a specific line of blocks in this grid layout, in the |
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* specified dimension. |
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* |
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* @since S60 3.2 |
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* |
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* @see @c AppendWeightL for more information on how weights are used to calculate layout positions. |
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* |
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* @param aDim the dimension to which the weight corresponds |
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* @param aPos the index of the cell |
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* @return the weight being used for the cell in the specified dimension, will be 0 magnitude if not set |
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*/ |
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IMPORT_C TAlfMetric Weight(TAlfGridDimension aDim, TInt aPos) const; |
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|
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/** |
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* Return the number of lines of blocks in this grid, along the specified dimension. |
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* |
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* @since S60 3.2 |
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* |
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* @param aDim the dimension along which to count |
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* @return The number of lines of blocks in this grid. |
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*/ |
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IMPORT_C TInt DimensionCount(TAlfGridDimension aDim) const; |
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|
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|
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/** |
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* ! Deprecated, use leaving method instead |
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*/ |
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void SetColumns(TInt aColumnCount) |
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{ |
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TRAP_IGNORE(SetColumnsL(aColumnCount)) |
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} |
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/** |
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* ! Deprecated, use leaving method instead |
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*/ |
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void SetRows(TInt aRowCount) |
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{ |
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TRAP_IGNORE(SetRowsL(aRowCount)) |
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} |
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/** |
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* ! Deprecated, use leaving method instead |
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*/ |
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void SetColumns(const RArray<TInt>& aWeights) |
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{ |
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TRAP_IGNORE(SetColumnsL(aWeights)) |
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} |
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/** |
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* ! Deprecated, use leaving method instead |
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*/ |
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void SetRows(const RArray<TInt>& aWeights) |
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{ |
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TRAP_IGNORE(SetRowsL(aWeights)) |
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} |
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/** |
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* Sets flags to control expanding behaviour. |
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* |
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* @param aFlags Flags |
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*/ |
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IMPORT_C void SetExpanding(TInt aFlags); |
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|
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/** |
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* Gets amount of rows. |
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* |
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* @return Amount of rows. |
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*/ |
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IMPORT_C TInt RowCount() const; |
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|
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/** |
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* Gets amount of columns. |
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* |
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* @return Amount of columns. |
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*/ |
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IMPORT_C TInt ColumnCount() const; |
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|
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/** |
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* Calculates the position of a child in the grid. Returns the block |
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* position, where block (0, 0) is in the top left corner. |
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* |
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* @param aOrdinal Ordinal of a child. |
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* |
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* @return Block position of the child. |
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*/ |
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IMPORT_C TPoint OrdinalToBlock(TInt aOrdinal) const; |
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|
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/** |
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* Sets flag(s) which alter the children's pixel error distribution within the grid layout. |
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* |
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* This method allows the client to force all items in the grid layout to be the same |
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* pixel size. The floating point error that this introduces is distributed between the various |
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* paddings of the layout. |
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* |
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* Example of use that allows outer paddings to be automatically adjusted: |
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* \code |
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* iGridLayout->SetLayoutModeFlags(EHuiGridRow, EHuiGridAdjustOuterPadding); |
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* \endcode |
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* |
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* Note that some flags are mutually exclusive, and will clear some existing flags if set. |
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* |
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* @param aDim the dimension to which the given flag(s) affect. |
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* @param aGridLayoutModeFlags Flags to be set or cleared |
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* @see TAlfGridLayoutModeFlags, ClearLayoutModeFlags |
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*/ |
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IMPORT_C void SetLayoutModeFlags(TAlfGridDimension aDim, TUint aGridLayoutModeFlags); |
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|
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/** |
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* Clears flag(s) which alter the children's pixel error distribution within the grid layout. |
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* |
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* @param aDim the dimension to which the given flag(s) affect. |
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* @param aGridLayoutModeFlags Flags to be cleared |
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* @see TAlfGridLayoutModeFlags, SetLayoutModeFlags |
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*/ |
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IMPORT_C void ClearLayoutModeFlags(TAlfGridDimension aDim, TUint aGridLayoutModeFlags); |
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|
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/** |
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* Return flag(s) which alter the children's pixel error distribution within the grid layout. |
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* |
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* @param aDim the dimension to return the flags for. |
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*/ |
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IMPORT_C TInt LayoutModeFlags(TAlfGridDimension aDim); |
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|
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/** |
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* From CAlfVisual |
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* @see CAlfVisual |
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*/ |
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IMPORT_C void RemoveAndDestroyAllD(); |
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IMPORT_C void UpdateChildrenLayout(TInt aTransitionTime = 0); |
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IMPORT_C CAlfVisual* FindTag(const TDesC8& aTag); |
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|
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/** |
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* From CAlfLayout |
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* @see CAlfLayout |
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*/ |
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IMPORT_C TAlfXYMetric BaseUnit() const; |
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protected: |
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/** |
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* From CAlfVisual |
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* @see CAlfVisual |
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*/ |
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IMPORT_C void DoRemoveAndDestroyAllD(); |
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IMPORT_C void PropertyOwnerExtension(const TUid& aExtensionUid, TAny** aExtensionParams); |
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private: |
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// Private structure. Owned. |
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struct TGridLayoutPrivateData; |
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TGridLayoutPrivateData* iGridLayoutData; |
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}; |
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#endif // C_ALFGRIDLAYOUT_H |