//--------------------------------------------------------------------------------------
// File: DXUTgui.h
//
// Desc: 
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//--------------------------------------------------------------------------------------
#pragma once
#ifndef DXUT_GUI_H
#define DXUT_GUI_H

//--------------------------------------------------------------------------------------
// Forward declarations
//--------------------------------------------------------------------------------------
class CDXUTDialogResourceManager;
class CDXUTControl;
class CDXUTStatic;
class CDXUTElement;
struct DXUTElementHolder;
typedef VOID (CALLBACK *PCALLBACKDXUTGUIEVENT) ( UINT nEvent, int nControlID, CDXUTControl* pControl, void* pUserContext );


//--------------------------------------------------------------------------------------
// Enums for pre-defined control types
//--------------------------------------------------------------------------------------
enum DXUT_CONTROL_TYPE 
{ 
    DXUT_CONTROL_BUTTON, 
    DXUT_CONTROL_STATIC, 
    DXUT_CONTROL_CHECKBOX,
    DXUT_CONTROL_RADIOBUTTON,
    DXUT_CONTROL_COMBOBOX,
    DXUT_CONTROL_SLIDER,
    DXUT_CONTROL_EDITBOX,
    DXUT_CONTROL_IMEEDITBOX,
    DXUT_CONTROL_LISTBOX,
    DXUT_CONTROL_SCROLLBAR,
};

enum DXUT_CONTROL_STATE
{
    DXUT_STATE_NORMAL = 0,
    DXUT_STATE_DISABLED,
    DXUT_STATE_HIDDEN,
    DXUT_STATE_FOCUS,
    DXUT_STATE_MOUSEOVER,
    DXUT_STATE_PRESSED,
};

#define MAX_CONTROL_STATES 6

struct DXUTBlendColor
{
    void Init( D3DCOLOR defaultColor, D3DCOLOR disabledColor = D3DCOLOR_ARGB(200, 128, 128, 128), D3DCOLOR hiddenColor = 0 );
    void Blend( UINT iState, float fElapsedTime, float fRate = 0.7f );
    
    D3DCOLOR  States[ MAX_CONTROL_STATES ]; // Modulate colors for all possible control states
    D3DXCOLOR Current;
};


//-----------------------------------------------------------------------------
// Contains all the display tweakables for a sub-control
//-----------------------------------------------------------------------------
class CDXUTElement
{
public:
    UINT iTexture;          // Index of the texture for this Element 
    UINT iFont;             // Index of the font for this Element
    DWORD dwTextFormat;     // The format argument to DrawText 

    RECT rcTexture;         // Bounding rect of this element on the composite texture
    
    DXUTBlendColor TextureColor;
    DXUTBlendColor FontColor;
};


//-----------------------------------------------------------------------------
// All controls must be assigned to a dialog, which handles
// input and rendering for the controls.
//-----------------------------------------------------------------------------
class CDXUTDialog
{
public:
    CDXUTDialog();

    bool m_bNonUserEvents;
    bool m_bKeyboardInput;
    bool m_bMouseInput;

private:
    int m_nDefaultControlID;

    static double s_fTimeRefresh;
    double m_fTimeLastRefresh;


    CDXUTControl* m_pControlMouseOver;           // The control which is hovered over

    bool m_bVisible;
    bool m_bCaption;
    bool m_bMinimized;
    TCHAR m_wszCaption[256];

    int m_x;
    int m_y;
    int m_width;
    int m_height;
    int m_nCaptionHeight;

    D3DCOLOR m_colorTopLeft;
    D3DCOLOR m_colorTopRight;
    D3DCOLOR m_colorBottomLeft;
    D3DCOLOR m_colorBottomRight;

    CDXUTDialogResourceManager* m_pManager;
    PCALLBACKDXUTGUIEVENT m_pCallbackEvent;
    void* m_pCallbackEventUserContext;

    CGrowableArray< int > m_Textures;   // Index into m_TextureCache;
    CGrowableArray< int > m_Fonts;      // Index into m_FontCache;

    CGrowableArray< CDXUTControl* > m_Controls;
    CGrowableArray< DXUTElementHolder* > m_DefaultElements;

    CDXUTElement m_CapElement;  // Element for the caption

    CDXUTDialog* m_pNextDialog;
    CDXUTDialog* m_pPrevDialog;
};


//--------------------------------------------------------------------------------------
// Structs for shared resources
//--------------------------------------------------------------------------------------
struct DXUTTextureNode
{
    TCHAR strFilename[MAX_PATH];
    IDirect3DTexture9* pTexture;
    DWORD dwWidth;
    DWORD dwHeight;
};

struct DXUTFontNode
{
    TCHAR strFace[MAX_PATH];
    ID3DXFont* pFont;
    LONG  nHeight;
    LONG  nWeight;
};


//-----------------------------------------------------------------------------
// Manages shared resources of dialogs
//-----------------------------------------------------------------------------
class CDXUTDialogResourceManager
{
public:
    CDXUTDialogResourceManager();

    HRESULT     OnResetDevice();
    void        OnLostDevice();
    void        OnDestroyDevice();

    // Shared between all dialogs
    IDirect3DStateBlock9* m_pStateBlock;
    ID3DXSprite*          m_pSprite;          // Sprite used for drawing

protected:
    CGrowableArray< DXUTTextureNode* > m_TextureCache;   // Shared textures
    CGrowableArray< DXUTFontNode* > m_FontCache;         // Shared fonts
    
    IDirect3DDevice9* m_pd3dDevice;

};


//-----------------------------------------------------------------------------
// Base class for controls
//-----------------------------------------------------------------------------
class CDXUTControl
{
public:
    CDXUTControl( CDXUTDialog *pDialog = NULL );

    virtual HRESULT OnInit() { return S_OK; }
    virtual void Render( IDirect3DDevice9* pd3dDevice, float fElapsedTime ) { };

    // Windows message handler
    virtual bool MsgProc( UINT uMsg, WPARAM wParam, LPARAM lParam ) { return false; }

    virtual bool HandleKeyboard( UINT uMsg, WPARAM wParam, LPARAM lParam ) { return false; }
    virtual bool HandleMouse( UINT uMsg, POINT pt, WPARAM wParam, LPARAM lParam ) { return false; }

    virtual bool CanHaveFocus() { return false; }
    virtual void OnFocusIn() { m_bHasFocus = true; }
    virtual void OnFocusOut() { m_bHasFocus = false; }
    virtual void OnMouseEnter() { m_bMouseOver = true; }
    virtual void OnMouseLeave() { m_bMouseOver = false; }
    virtual void OnHotkey() {}

    virtual BOOL ContainsPoint( POINT pt ) { return PtInRect( &m_rcBoundingBox, pt ); }

    virtual void SetEnabled( bool bEnabled ) { m_bEnabled = bEnabled; }
    virtual bool GetEnabled() { return m_bEnabled; }
    virtual void SetVisible( bool bVisible ) { m_bVisible = bVisible; }
    virtual bool GetVisible() { return m_bVisible; }

    UINT GetType() const { return m_Type; }

    int  GetID() const { return m_ID; }
    void SetID( int ID ) { m_ID = ID; }

    void SetHotkey( UINT nHotkey ) { m_nHotkey = nHotkey; }
    UINT GetHotkey() { return m_nHotkey; }

    void SetUserData( void *pUserData ) { m_pUserData = pUserData; }
    void *GetUserData() const { return m_pUserData; }


    bool m_bVisible;                // Shown/hidden flag
    bool m_bMouseOver;              // Mouse pointer is above control
    bool m_bHasFocus;               // Control has input focus
    bool m_bIsDefault;              // Is the default control

    // Size, scale, and positioning members
    int m_x, m_y;
    int m_width, m_height;

    // These members are set by the container
    CDXUTDialog* m_pDialog;    // Parent container
    UINT m_Index;              // Index within the control list
    
    CGrowableArray< CDXUTElement* > m_Elements;  // All display elements

protected:
    int  m_ID;                 // ID number
    DXUT_CONTROL_TYPE m_Type;  // Control type, set once in constructor  
    UINT m_nHotkey;            // Virtual key code for this control's hotkey
    void *m_pUserData;         // Data associated with this control that is set by user.
    
    bool m_bEnabled;           // Enabled/disabled flag
    
    RECT m_rcBoundingBox;      // Rectangle defining the active region of the control
};


//-----------------------------------------------------------------------------
// Contains all the display information for a given control type
//-----------------------------------------------------------------------------
struct DXUTElementHolder
{
    UINT nControlType;
    UINT iElement;

    CDXUTElement Element;
};


//-----------------------------------------------------------------------------
// Static control
//-----------------------------------------------------------------------------
class CDXUTStatic : public CDXUTControl
{
public:

    HRESULT GetTextCopy( PCHAR strDest, UINT bufferCount );


protected:
    TCHAR m_strText[MAX_PATH];      // Window text  
};


#endif // DXUT_GUI_H