102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////////////////
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// NoesisGUI - http://www.noesisengine.com
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// Copyright (c) Noesis Technologies S.L. All Rights Reserved.
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////////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef __GUI_DATATRIGGER_H__
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#define __GUI_DATATRIGGER_H__
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#include <NsCore/Noesis.h>
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#include <NsCore/HashMap.h>
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#include <NsCore/Ptr.h>
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#include <NsGui/CoreApi.h>
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#include <NsGui/BaseTrigger.h>
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namespace Noesis
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{
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class BaseSetter;
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class BaseBinding;
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template<class T> class UICollection;
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typedef UICollection<BaseSetter> BaseSetterCollection;
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NS_WARNING_PUSH
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NS_MSVC_WARNING_DISABLE(4251 4275)
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Represents a trigger that applies property values or performs actions when the bound data meets
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/// a specified condition.
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///
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/// Style, ControlTemplate, and DataTemplate all have a triggers collection. A DataTrigger
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/// allows you to set property values when the property value of the data object matches a
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/// specified Value. For example, if you are displaying a list of *Employee* objects, you may want
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/// the foreground color to be different based on each *Employee's* current attendance. In some
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/// scenarios it may be more suitable to create a converter or to use a DataTemplateSelector.
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///
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/// http://msdn.microsoft.com/en-us/library/system.windows.datatrigger.aspx
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////////////////////////////////////////////////////////////////////////////////////////////////////
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class NS_GUI_CORE_API DataTrigger: public BaseTrigger
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{
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public:
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/// Constructor
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DataTrigger();
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/// Destructor
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~DataTrigger();
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/// Gets or sets the binding that produces the property value of the data object.
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//@{
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BaseBinding* GetBinding() const;
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void SetBinding(BaseBinding* binding);
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//@}
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/// Gets a collection of Setter objects, which describe the property values to apply when the
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/// data item meets the specified condition.
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//@{
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BaseSetterCollection* GetSetters() const;
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//@}
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/// Gets or sets the value to be compared with the property value of the data object.
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//@{
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BaseComponent* GetValue() const;
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void SetValue(BaseComponent* value);
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//@}
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/// From BaseTrigger
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//@{
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void RegisterBindings(FrameworkElement* target, FrameworkElement* nameScope,
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bool skipTargetName, uint8_t priority) final;
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void UnregisterBindings(FrameworkElement* target) final;
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BaseComponent* FindValue(FrameworkElement* target, FrameworkElement* nameScope,
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DependencyObject* object, const DependencyProperty* dp, bool skipSourceName,
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bool skipTargetName) final;
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void Invalidate(FrameworkElement* target, FrameworkElement* nameScope,
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bool skipSourceName, bool skipTargetName, uint8_t priority) final;
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void Seal() override;
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//@}
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BaseSetterCollection* InternalGetSetters() const; // can return null
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struct Listener;
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private:
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Ptr<BaseBinding> mBinding;
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Ptr<BaseComponent> mValue;
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mutable Ptr<BaseSetterCollection> mSetters;
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struct ListenerHashKeyInfo;
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typedef HashSet<Listener*, 0, HashBucket_K<Listener*, ListenerHashKeyInfo>> Listeners;
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Listeners mListeners;
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NS_DECLARE_REFLECTION(DataTrigger, BaseTrigger)
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};
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NS_WARNING_POP
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}
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#endif
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