91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// NoesisGUI - http://www.noesisengine.com
|
|
// Copyright (c) 2013 Noesis Technologies S.L. All Rights Reserved.
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
#ifndef __GUI_BASEBINDINGEXPRESSION_H__
|
|
#define __GUI_BASEBINDINGEXPRESSION_H__
|
|
|
|
|
|
#include <NsCore/Noesis.h>
|
|
#include <NsGui/Expression.h>
|
|
#include <NsGui/CoreApi.h>
|
|
#include <NsGui/UpdateSourceTrigger.h>
|
|
#include <NsCore/ReflectionDeclare.h>
|
|
#include <NsCore/Ptr.h>
|
|
|
|
|
|
namespace Noesis
|
|
{
|
|
|
|
class BaseBinding;
|
|
class DependencyObject;
|
|
class DependencyProperty;
|
|
enum BindingMode: int32_t;
|
|
|
|
NS_WARNING_PUSH
|
|
NS_MSVC_WARNING_DISABLE(4251 4275)
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
/// Represents the base class for all Binding Expressions.
|
|
///
|
|
/// https://msdn.microsoft.com/en-us/library/system.windows.data.bindingexpressionbase.aspx
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
class NS_GUI_CORE_API BaseBindingExpression: public Expression
|
|
{
|
|
public:
|
|
BaseBindingExpression();
|
|
BaseBindingExpression(BaseBinding* binding, DependencyObject* targetObject,
|
|
const DependencyProperty* targetProperty);
|
|
BaseBindingExpression(const BaseBindingExpression&) = delete;
|
|
BaseBindingExpression& operator=(const BaseBindingExpression&) = delete;
|
|
virtual ~BaseBindingExpression() = 0;
|
|
|
|
/// Gets the element to which this BindingExpression is attached
|
|
/// \prop
|
|
DependencyObject* GetTarget() const;
|
|
|
|
/// Gets the property to which this BindingExpression is attached
|
|
/// \prop
|
|
const DependencyProperty* GetTargetProperty() const;
|
|
|
|
/// Gets the BaseBinding object from which this BaseBindingExpression object is created
|
|
/// \prop
|
|
BaseBinding* GetParentBindingBase() const;
|
|
|
|
/// Forces a data transfer from source to target
|
|
virtual void UpdateTarget() const = 0;
|
|
|
|
/// Sends the current value back to the source. Does nothing when binding's Mode is not TwoWay
|
|
/// or OneWayToSource
|
|
virtual void UpdateSource() const = 0;
|
|
|
|
protected:
|
|
void ResolveEffectiveDefaultValues(BindingMode& mode, UpdateSourceTrigger& trigger);
|
|
|
|
protected:
|
|
// Base binding which originated the expression
|
|
Ptr<BaseBinding> mBinding;
|
|
|
|
// Dependency object where the expression is applied
|
|
DependencyObject* mTargetObject;
|
|
|
|
// Dependency property where the expression is applied
|
|
const DependencyProperty* mTargetProperty;
|
|
|
|
// The effective fallback value to assign in case of fail in the binding
|
|
Ptr<BaseComponent> mEffectiveFallback;
|
|
|
|
// The effective value to assign in case the final target value is null
|
|
Ptr<BaseComponent> mEffectiveTargetNull;
|
|
|
|
NS_DECLARE_REFLECTION(BaseBindingExpression, Expression)
|
|
};
|
|
|
|
NS_WARNING_POP
|
|
|
|
}
|
|
|
|
#endif
|