////////////////////////////////////////////////////////////////////////////////////////////////////
// NoesisGUI - http://www.noesisengine.com
// Copyright (c) 2013 Noesis Technologies S.L. All Rights Reserved.
////////////////////////////////////////////////////////////////////////////////////////////////////


#ifndef __GUI_ROUTEDCOMMAND_H__
#define __GUI_ROUTEDCOMMAND_H__


#include <NsCore/Noesis.h>
#include <NsGui/CoreApi.h>
#include <NsGui/BaseCommand.h>
#include <NsCore/ReflectionDeclare.h>
#include <NsCore/Delegate.h>
#include <NsCore/Symbol.h>


namespace Noesis
{

class InputGesture;
class UIElement;

template<class T> class UICollection;
typedef UICollection<InputGesture> InputGestureCollection;

NS_WARNING_PUSH
NS_MSVC_WARNING_DISABLE(4251 4275)

////////////////////////////////////////////////////////////////////////////////////////////////////
/// A command that is routed through the element tree.
///
/// http://msdn.microsoft.com/en-us/library/system.windows.input.routedcommand.aspx
////////////////////////////////////////////////////////////////////////////////////////////////////
class NS_GUI_CORE_API RoutedCommand: public BaseCommand
{
public:
    RoutedCommand();
    RoutedCommand(Symbol name, const TypeClass* owner);
    RoutedCommand(Symbol name, const TypeClass* owner, InputGestureCollection* inputGestures);
    ~RoutedCommand();

    ///  Gets the name of the command as it is registered in the CommandManager
    /// \prop
    Symbol GetName() const;

    /// Gets the class type of the object that defines the command
    /// \prop
    const TypeClass* GetOwnerType() const;

    // Creates a routed command
    //@{
    static Ptr<RoutedCommand> Create(const char* name, const TypeClass* owner);
    static Ptr<RoutedCommand> Create(const char* name, const TypeClass* owner,
        InputGesture* inputGesture);
    static Ptr<RoutedCommand> Create(const char* name, const TypeClass* owner,
        InputGesture* inputGesture1, InputGesture* inputGesture2);
    //@}

    /// Gets the collection of InputGesture objects that are associated with this command
    InputGestureCollection* GetInputGestures() const;

    /// Determines whether this RoutedCommand can execute in its current state
    bool CanExecute(BaseComponent* param, UIElement* target) const;

    /// Executes the RoutedCommand on the current command target
    void Execute(BaseComponent* param, UIElement* target) const;

    /// From ICommand
    //@{
    bool CanExecute(BaseComponent* param) const override;
    void Execute(BaseComponent* param) const override;
    //@}

protected:
    static Ptr<InputGestureCollection> CreateInputGestures(InputGesture* inputGesture1,
        InputGesture* inputGesture2);

private:
    friend struct CommandManager;
    bool CanExecute(BaseComponent* param, UIElement* target, bool& continueRouting) const;

private:
    Symbol mName;
    const TypeClass* mOwnerType;
    Ptr<InputGestureCollection> mInputGestures;

    NS_DECLARE_REFLECTION(RoutedCommand, BaseCommand)
};

NS_WARNING_POP

}


#endif