author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 21 Jun 2010 16:41:52 +0300 | |
branch | RCL_3 |
changeset 41 | cd0ae4656946 |
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: Timed values |
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* |
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*/ |
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#ifndef __ALF_TIMED_VALUE__ |
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#define __ALF_TIMED_VALUE__ |
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#include <e32std.h> |
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// Todo: is there need to expose these |
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enum TAlfTimedValueFlags |
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{ |
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EAlfValueFlagsNone = 0, |
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EAlfValueNowChanged = 1, |
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EAlfValueTargetChanged = 2, |
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EAlfInterpolationStyleChanged =4, |
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EAlfMappingFunctionChanged = 8, |
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EAlfSpeedChanged = 16, |
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EAlfValueFlagsAll = 0xffffffff |
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}; |
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/** |
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* Timed value interpolation styles. |
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* |
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* @see To implement custom interpolation styles, you can use |
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* mapping functions. |
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* |
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* @see MAlfMappingFunction |
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* @see TAlfTimedValue::SetFunction() |
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*/ |
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enum TAlfInterpolationStyle |
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{ |
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/** No interpolation is done. The target value becomes effective |
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in a single step. */ |
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EAlfTimedValueStyleUseSystemDefault, |
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EAlfTimedValueStyleNone, |
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/** Use linear interpolation between the current value and the |
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target value. */ |
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EAlfTimedValueStyleLinear, |
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/** Use a sine wave for approximating preservation of momentum. */ |
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EAlfTimedValueStyleSineWave, |
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/** Quarter of a sine wave for decelerating movement. */ |
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EAlfTimedValueStyleDecelerate, |
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|
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/** Quarter of a sine wave for accelerating movement. */ |
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EAlfTimedValueStyleAccelerate, |
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/** Sine wave or decelerating style based on when the target value |
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is defined. */ |
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EAlfTimedValueStyleAdaptive, |
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/** Combination of linear and deceleration. */ |
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EAlfTimedValueStyleImpulse, |
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EAlfTimedValueStyleLast |
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}; |
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/** |
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* |
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* Timed value class. |
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* |
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* Timed values are able to interpolate their value independently based on |
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* time. The interpolation can be configured to follow a curve instead of |
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* being linear. Timed value does not restrict the value units but interpolates |
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* on any given real value. Mapping function can be used that maps the interpolated |
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* values to some other real value space. If no mapping function is specified an |
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* identity mapping is used. Current values and target values of timed value can be |
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* set through class methods. Delays for timed value to achieve the target value can |
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* be given in the Set - method. Timed value supports number of different interpolation |
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* styles. |
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* |
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* @code |
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* // Here are some examples how the timed value can be used. |
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* // In the examples, the opacity of the visual is used as |
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* // an example, but any of the timed values work the same. |
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* |
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* // #1 New variable - getters are not really relevant |
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* TAlfTimedValue opacity; |
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* opacity->SetTarget( 1, 500 ); |
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* visual->SetOpacity( opacity ); // changes only the target |
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* |
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* // 2# Data fetching |
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* // a) preferred |
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* const TAlfTimedValue& opacity = visual->Opacity(); |
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* TReal32 valueNow = opacity->ValueNow(); |
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* TReal32 target = opacity->Target(); |
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* // b) |
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* TReal32 valueNow = visual->Opacity().ValueNow(); |
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* TReal32 target = visual->Opacity().Target(); |
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* |
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* // 3# Data fetching and value update |
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* TAlfTimedValue opacity( visual->Opacity() ); |
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* TReal32 target = opacity->Target(); |
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* opacity->SetTarget( target*2, 500 ); |
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* visual->SetOpacity( opacity ); |
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* |
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* // 4# Use the same timed value for other places: |
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* // a) |
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* const TAlfTimedValue& visualOpacity = visual->Opacity(); |
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* layout->SetOpacity( visualOpacity ); |
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* // b) |
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* TAlfTimedValue visualOpacity( visual->Opacity() ); |
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* visualOpacity->SetTarget( 1, 500 ); |
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* layout->SetOpacity( visualOpacity ); |
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* @endcode |
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* |
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* @lib alfclient.lib |
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* @since S60 v3.2 |
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**/ |
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class TAlfTimedValue |
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{ |
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public: |
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|
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/** |
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* Constructor. Enables creation of timed value with no explicitly set initial value. |
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* The timed value is set to zero. |
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* |
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*/ |
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IMPORT_C TAlfTimedValue(); |
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|
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/** |
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* Constructor. Enables initial value setting. |
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* |
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* @param aInitialValue Initial value. |
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* |
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*/ |
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IMPORT_C TAlfTimedValue(TReal32 aInitialValue) __SOFTFP; |
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|
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/** |
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* Constructor. Enables target value setting. |
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* |
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* @param aTargetValue Target value. |
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* @param aTime When the target value will be in effect. Transition duration in milliseconds. |
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* |
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*/ |
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IMPORT_C TAlfTimedValue(TReal32 aTargetValue, TInt aTime) __SOFTFP; |
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|
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/** |
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* Set a new current value Change becomes effective immediately. |
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* |
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* @param aValueNow New currentvalue. |
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*/ |
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IMPORT_C void SetValueNow(const TReal32& aValueNow) __SOFTFP; |
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|
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/** |
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* Gets current value. |
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* |
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* @return Current value. |
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*/ |
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IMPORT_C TReal32 ValueNow() const __SOFTFP; |
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|
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/** |
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* Set a new target value that becomes effective after a delay. |
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* @see SetTargetWithSpeed() |
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* |
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* @param aValue New target value. |
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* @param aTime Time duration after the target value will be in effect. Transition duration in milliseconds. |
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*/ |
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IMPORT_C void SetTarget(const TReal32& aTarget, TInt aTime) __SOFTFP; |
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|
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/** |
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* Sets a new target value. The transition time depends on the speed. |
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* @see SetTarget() |
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* |
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* @param aTarget New target value. |
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* @param aUnitsPerSecond Speed of change. |
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*/ |
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IMPORT_C void SetTargetWithSpeed(TReal32 aTarget, TReal32 aUnitsPerSecond) __SOFTFP; |
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|
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/** |
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* Gets target value. |
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* |
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* @return Target value. |
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*/ |
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IMPORT_C TReal32 Target() const __SOFTFP; |
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/** |
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* Gets duration of the transition. |
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* |
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* @return Duration time in milliseconds.. |
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*/ |
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IMPORT_C TInt TimeToTargetinMilliSeconds() const; |
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/** |
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* Gets speed of the transition in units per second if it has been set |
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* with SetTargetWithSpeed. |
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* |
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* @return Speed of the transition in units per second. |
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*/ |
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IMPORT_C TReal32 Speed() const __SOFTFP; |
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/** |
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* Sets the interpolation style of the timed value. |
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* |
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* @param aStyle Interpolation style used to reach target value. |
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*/ |
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IMPORT_C void SetStyle(TAlfInterpolationStyle aStyle); |
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/** |
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* Sets identifier of a mapping function that affects the timed value. |
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* |
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* @param aIdentifier Identifier of a function that will map the current value to required |
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* number space. |
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*/ |
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IMPORT_C void SetMappingFunctionIdentifier(TInt aIdentifier); |
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/** |
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* Gets identifier of a mapping function that affects the timed value. |
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* |
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* @return aIdentifier Identifier of a function that will map the current value to required |
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* number space. |
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*/ |
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IMPORT_C TInt MappingFunctionIdentifier() const; |
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/** |
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* Gets flags. |
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* |
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* @return Flags. |
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*/ |
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IMPORT_C TInt& Flags(); |
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|
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/** |
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* Gets the interpolation style of the timed value. |
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* |
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* @return Interpolation style used to reach target value. |
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*/ |
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IMPORT_C TAlfInterpolationStyle Style(); |
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private: |
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TReal32 iValueNow; |
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TReal32 iValueTarget; |
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TInt iTimeToTarget; |
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TInt iInterpolationStyle; |
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TInt iMappingFunctionIdentifier; |
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TReal32 iSpeed; |
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TInt iFlags; |
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private: |
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TInt iSpare1; |
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TInt iSpare2; |
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}; |
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struct TAlfRealPoint |
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{ |
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TAlfRealPoint():iX(0),iY(0){} |
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TAlfRealPoint(const TReal32& aX, const TReal32& aY):iX(aX),iY(aY){} |
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TAlfRealPoint(const TPoint& aPoint):iX(aPoint.iX),iY(aPoint.iY){} |
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inline operator TPoint() const |
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{ |
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return TPoint((TInt)iX, (TInt)iY); |
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} |
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inline TSize AsSize() const |
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{ |
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return TSize((TInt)iX, (TInt)iY); |
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} |
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inline TAlfRealPoint operator-(const TAlfRealPoint& aPoint) const |
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{ |
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return TAlfRealPoint(iX - aPoint.iX, iY - aPoint.iY); |
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} |
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inline TAlfRealPoint operator+(const TAlfRealPoint& aPoint) const |
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{ |
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return TAlfRealPoint(iX + aPoint.iX, iY + aPoint.iY); |
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} |
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inline TAlfRealPoint& operator+=(const TAlfRealPoint& aPoint) |
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{ |
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iX += aPoint.iX; |
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iY += aPoint.iY; |
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return *this; |
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} |
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inline TAlfRealPoint& operator-=(const TAlfRealPoint& aPoint) |
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{ |
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iX -= aPoint.iX; |
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iY -= aPoint.iY; |
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return *this; |
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} |
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|
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inline TBool operator==(const TAlfRealPoint& aPoint) const |
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{ |
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if ( Abs(iX-aPoint.iX) < 0.0001 && Abs(iY-aPoint.iY) < 0.0001 ) |
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{ |
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return ETrue; |
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} |
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return EFalse; |
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} |
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TReal32 iX; |
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TReal32 iY; |
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private: |
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TInt iSpare1; |
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TInt iSpare2; |
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}; |
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struct TAlfRealSize |
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{ |
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TAlfRealSize() |
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: iWidth(0.f), iHeight(0.f) {} |
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inline TAlfRealSize(TReal32 aWidth, TReal32 aHeight) |
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: iWidth(aWidth), iHeight(aHeight) |
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{ |
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} |
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inline TAlfRealSize(const TSize& aSize) |
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: iWidth((TReal32)aSize.iWidth), iHeight((TReal32)aSize.iHeight) |
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{ |
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} |
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inline TAlfRealSize(const TAlfRealPoint& aPoint) |
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: iWidth( aPoint.iX ), iHeight( aPoint.iY ) |
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{ |
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} |
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inline operator TSize() const |
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{ |
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return TSize((TInt)iWidth, (TInt)iHeight); |
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} |
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public: |
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/** Width. */ |
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TReal32 iWidth; |
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/** Height. */ |
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TReal32 iHeight; |
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private: |
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TInt iSpare1; |
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TInt iSpare2; |
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}; |
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struct TAlfRealRect |
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{ |
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TAlfRealRect(){} |
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TAlfRealRect(const TRect& aRect):iTl(aRect.iTl),iBr(aRect.iBr){} |
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TAlfRealRect(const TAlfRealPoint& aTl, const TAlfRealPoint& aBr):iTl(aTl),iBr(aBr){} |
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inline operator TRect() const |
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{ |
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return TRect((TPoint)iTl, (TPoint)iBr); |
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} |
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|
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inline TReal32 Width() const |
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{ |
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return iBr.iX - iTl.iX; |
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} |
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|
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inline TReal32 Height() const |
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{ |
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return iBr.iY - iTl.iY; |
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} |
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|
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inline TAlfRealPoint TopRight() const |
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{ |
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return TAlfRealPoint(iBr.iX, iTl.iY); |
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} |
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|
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inline TAlfRealPoint BottomLeft() const |
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{ |
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return TAlfRealPoint(iTl.iX, iBr.iY); |
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} |
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|
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inline TAlfRealSize Size() const |
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{ |
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|
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return TAlfRealSize(Width(), Height()); |
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} |
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|
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|
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|
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inline TAlfRealPoint Center() const |
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{ |
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|
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return iTl + TAlfRealPoint(Width()/2, Height()/2); |
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} |
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|
399 |
|
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|
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401 |
inline void Grow(TReal32 aX, TReal32 aY) |
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{ |
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iTl.iX -= aX; |
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iTl.iY -= aY; |
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iBr.iX += aX; |
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|
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iBr.iY += aY; |
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} |
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|
408 |
|
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409 |
inline void Shrink(TReal32 aX, TReal32 aY) |
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{ |
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|
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iTl.iX += aX; |
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iTl.iY += aY; |
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|
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iBr.iX -= aX; |
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iBr.iY -= aY; |
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} |
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|
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|
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inline void Shrink(const TPoint& aPoint) |
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{ |
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iTl.iX += aPoint.iX; |
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iTl.iY += aPoint.iY; |
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iBr.iX -= aPoint.iX; |
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iBr.iY -= aPoint.iY; |
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} |
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|
424 |
|
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425 |
inline void Shrink(const TAlfRealPoint& aPoint) |
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{ |
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iTl.iX += aPoint.iX; |
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iTl.iY += aPoint.iY; |
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iBr.iX -= aPoint.iX; |
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iBr.iY -= aPoint.iY; |
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} |
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|
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inline void Shrink(const TAlfRealRect& aRect) |
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{ |
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iTl.iX += aRect.iTl.iX; |
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iTl.iY += aRect.iTl.iY; |
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iBr.iX -= aRect.iBr.iX; |
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iBr.iY -= aRect.iBr.iY; |
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} |
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|
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inline void Move(TReal32 aDx, TReal32 aDy) |
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{ |
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iTl.iX += aDx; |
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iTl.iY += aDy; |
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iBr.iX += aDx; |
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iBr.iY += aDy; |
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} |
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|
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TAlfRealPoint iTl; |
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TAlfRealPoint iBr; |
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|
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private: |
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TInt iSpare1; |
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TInt iSpare2; |
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}; |
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|
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class TAlfTimedPoint |
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{ |
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public: |
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/** |
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* Default constructor. |
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*/ |
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IMPORT_C TAlfTimedPoint(); |
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|
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/** |
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* Constructor that sets default values. |
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*/ |
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IMPORT_C TAlfTimedPoint(TReal32 aX, TReal32 aY) __SOFTFP; |
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|
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/** |
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* Constructor. Enables target value setting. |
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* |
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* @param aXTarget Target X value. |
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* @param aYTarget Target Y value. |
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* @param aTransitionTime When the target value will be in effect. Transition duration in milliseconds. |
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* |
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*/ |
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IMPORT_C TAlfTimedPoint(TReal32 aXTarget, TReal32 aYTarget, TInt aTransitionTime) __SOFTFP; |
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|
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/** |
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* Sets the interpolation style of both components of the point. |
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* |
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* @param aStyle Timed value interpolation style. |
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*/ |
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IMPORT_C void SetStyle(TAlfInterpolationStyle aStyle); |
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|
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/** |
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* Sets identifier of a mapping function that affects the timed value for both |
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* components of the point. |
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* |
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* @param aIdentifier Identifier of a function that will map the current value to required |
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* number space. |
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*/ |
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IMPORT_C void SetMappingFunctionIdentifier(TInt aIdentifier); |
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|
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/** |
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* Sets the target for the timed point. |
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* |
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* @param aPoint Target point. |
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* @param aTransitionTime Duration for reaching the target. |
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*/ |
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IMPORT_C void SetTarget(const TAlfRealPoint& aPoint, TInt aTransitionTime = 0); |
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|
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/** |
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* Sets the target value of both components of the timed point. |
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* |
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* @param aValue New target value. |
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* @param aTransitionTime Duration for reaching the target. |
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*/ |
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IMPORT_C void SetTarget(TReal32 aValue, TInt aTransitionTime = 0) __SOFTFP; |
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|
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512 |
/** |
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* Sets the target value for the timed point, with a transition that is |
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* done using a specific speed. |
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* |
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* @param aPoint Target point. |
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* @param aUnitsPerSecond Units per second during the transition. |
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*/ |
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IMPORT_C void SetTargetWithSpeed(const TAlfRealPoint& aPoint, TReal32 aUnitsPerSecond) __SOFTFP; |
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|
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/** |
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* Sets the target value of both components of the timed point. |
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* |
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* @param aValue New target value. |
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* @param aUnitsPerSecond Speed of change. |
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*/ |
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IMPORT_C void SetTargetWithSpeed(TReal32 aValue, TReal32 aUnitsPerSecond) __SOFTFP; |
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528 |
|
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/** |
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* Returns the current value of the point. |
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* |
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* @return Current values as a regular TAlfRealPoint. |
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*/ |
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inline TAlfRealPoint ValueNow() const |
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{ |
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return TAlfRealPoint(iX.ValueNow(), iY.ValueNow()); |
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} |
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|
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/** |
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* Returns the target value of the point. |
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* |
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* @return Target as a TAlfRealPoint. |
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*/ |
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inline TAlfRealPoint Target() const |
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{ |
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return TAlfRealPoint(iX.Target(), iY.Target()); |
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} |
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|
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/** |
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* Returns the transition time value of the point. |
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* |
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* @return Transition times as a TAlfRealPoint. |
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*/ |
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inline TAlfRealPoint TimeToTargetinMilliSeconds() const |
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{ |
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return TAlfRealPoint(iX.TimeToTargetinMilliSeconds(), iY.TimeToTargetinMilliSeconds()); |
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} |
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|
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/** |
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* Returns the current interpolatad value of the point rounded to nearest |
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* integer values. Note that the TAlfTimedPoint values are |
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* floating-point. |
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* |
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* @see ValueNow() For returning the floating-point current value. |
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* |
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* @return Current values as a regular TPoint. |
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*/ |
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IMPORT_C TPoint IntValueNow() const; |
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|
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/** |
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* Returns the target value of the point rounded to nearest |
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* integer values. Note that the TAlfTimedPoint values are |
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* floating-point. |
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* |
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* @see Target() For returning the floating-point values. |
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* |
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* @return Target values as a normal TPoint - target value rounded to |
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* nearest integer. |
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*/ |
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IMPORT_C TPoint IntTarget() const; |
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|
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public: |
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|
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TAlfTimedValue iX; |
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TAlfTimedValue iY; |
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|
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private: |
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TInt iSpare1; |
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TInt iSpare2; |
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}; |
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|
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|
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|
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Revision: 201003
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|
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Revision: 201003
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#endif |