//
// Urho3D Engine
// Copyright (c) 2008-2011 Lasse Öörni
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#pragma once

#include "Button.h"

/// Menu UI element that optionally shows a popup
class Menu : public Button
{
    OBJECT(Menu);
    
    using UIElement::SetStyle;
    
public:
    /// Construct
    Menu(Context* context);
    /// Destruct
    virtual ~Menu();
    /// Register object factory
    static void RegisterObject(Context* context);
    
    /// Set UI element style from XML data
    virtual void SetStyle(const XMLElement& element);
    /// React to the popup being shown
    virtual void OnShowPopup();
    
    /// Set popup element to show on selection
    void SetPopup(UIElement* element);
    /// Set popup element offset
    void SetPopupOffset(const IntVector2& offset);
    /// Set popup element offset
    void SetPopupOffset(int x, int y);
    /// Force the popup to show or hide
    void ShowPopup(bool enable);
    /// Set accelerator key (set zero key code to disable)
    void SetAccelerator(int key, int qualifiers);
    
    /// Return popup element
    UIElement* GetPopup() const { return popup_; }
    /// Return popup element offset
    const IntVector2& GetPopupOffset() const { return popupOffset_; }
    /// Return whether popup is open
    bool GetShowPopup() const { return showPopup_; }
    /// Return accelerator key code, 0 if disabled
    int GetAcceleratorKey() const { return acceleratorKey_; }
    /// Return accelerator qualifiers
    int GetAcceleratorQualifiers() const { return acceleratorQualifiers_; }
    
protected:
    /// Popup element
    SharedPtr<UIElement> popup_;
    /// Popup element offset
    IntVector2 popupOffset_;
    /// Show popup flag
    bool showPopup_;
    /// Accelerator key code
    int acceleratorKey_;
    /// Accelerator qualifiers
    int acceleratorQualifiers_;
    
private:
    /// Handle press and release for selection and toggling popup visibility
    void HandlePressedReleased(StringHash eventType, VariantMap& eventData);
    /// Handle UI focus change to check for hiding the popup
    void HandleFocusChanged(StringHash eventType, VariantMap& eventData);
    /// Handle keypress for checking accelerator
    void HandleKeyDown(StringHash eventType, VariantMap& eventData);
};