52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////////////////
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// NoesisGUI - http://www.noesisengine.com
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// Copyright (c) 2013 Noesis Technologies S.L. All Rights Reserved.
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////////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef __GUI_PROVIDERVALUE_H__
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#define __GUI_PROVIDERVALUE_H__
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#include <NsCore/Noesis.h>
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#include <NsCore/Ptr.h>
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#include <NsGui/DependencyProperty.h>
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namespace Noesis
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{
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class BaseComponent;
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struct ProviderValue
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{
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// Return values can be a boxed value or a raw value
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//@{
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// TODO: This can be changed to a BaseComponent* because providers doesn't create elements
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// TODO: Put into a union
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Ptr<BaseComponent> boxed = Ptr<BaseComponent>(DependencyProperty::GetUnsetValue());
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const void* rawValue = nullptr;
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//@}
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// Priority of the provider which returned the values
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uint8_t providerPriority = DefaultValueProviderPriority;
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// Indicates which of the above fields is valid. If its a raw value, the caching can be avoided
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// TODO [srodriguez] This will dissapear and the condition to not cache an element will be
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// comparing priority with InheritedValueProviderPriority or DefaultValueProviderPriority
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bool isRawValueAndNonCached = false;
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// Use 8 bits to store provider priority (256 possible providers)
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// User providers can't utilize LocalProviderPriority nor DefaultValueProviderPriority,
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// so there can be 254 max user providers
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static const uint8_t LocalProviderPriority = 0;
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static const uint8_t InheritedValueProviderPriority = 0xFE;
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static const uint8_t DefaultValueProviderPriority = 0xFF;
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};
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}
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#endif
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