/*
DISCLAIMER

Auther: Mizan Rahman
Original publication location: http://www.codeproject.com/KB/dialog/WndResizer.aspx

This work is provided under the terms and condition described in The Code Project Open License (CPOL)
(http://www.codeproject.com/info/cpol10.aspx)

This disclaimer should not be removed and should exist in any reproduction of this work.
*/

#pragma once
#include <uxtheme.h>


#define ANCHOR_LEFT                   1
#define ANCHOR_TOP                    2
#define ANCHOR_RIGHT                  4
#define ANCHOR_BOTTOM                 8
#define ANCHOR_HORIZONTALLY_CENTERED  16
#define ANCHOR_VERTICALLY_CENTERED    32
#define ANCHOR_PRIORITY_RIGHT         64   // by defualt, left has higher priority
#define ANCHOR_PRIORITY_BOTTOM        128  // by defualt, top has higher priority
#define ANCHOR_VERTICALLY             (ANCHOR_TOP | ANCHOR_BOTTOM)
#define ANCHOR_HORIZONTALLY           (ANCHOR_LEFT | ANCHOR_RIGHT)
#define ANCHOR_ALL                    (ANCHOR_VERTICALLY | ANCHOR_HORIZONTALLY)

#define DOCK_NONE   0
#define DOCK_LEFT   1
#define DOCK_TOP    2
#define DOCK_RIGHT  3
#define DOCK_BOTTOM 4
#define DOCK_FILL   5

class CPanel;

typedef CList<CPanel *, CPanel *> CPanelList;

typedef enum tagSplitterOrientation 
{
	// a horizontal splitter container panel
	SPLIT_CONTAINER_H = 1,
	// a vertical splitter contianer panel
	SPLIT_CONTAINER_V = 2, 

} SplitterOrientation;

typedef enum tagFlowDirection 
{
	// left to right flow direction
	LEFT_TO_RIGHT = 3,
	// top to bottom flow direction
	TOP_TO_BOTTOM = 4, 

} FlowDirection;

class CPanel : public CRect
{
public:
	CPanel();
	CPanel(const CRect * prc);
	virtual ~CPanel();
	UINT Anchor;
	UINT Dock;
	CString Name;
	CPanel * Parent;
	CPanelList Children;
	int LeftOffset;
	int TopOffset;
	int RightOffset;
	int BottomOffset; 
	CSize MinSize;
	CSize MaxSize;
	virtual void OnResized();
	virtual BOOL AddChild(CPanel * prc);
	virtual BOOL RemoveChild(CPanel * prc);
	virtual BOOL SetAnchor(UINT anchor);
	virtual BOOL SetMinSize(CSize & size);
	virtual BOOL SetMaxSize(CSize & size);
	virtual CString ToString();
	virtual CString GetTypeName();
	virtual CWnd * GetHookedWnd();
private:
	void Init();
};

class CRootPanel : public CPanel
{
public:
	CRootPanel();
	~CRootPanel();
	virtual CWnd * GetHookedWnd();
	CWnd * m_pHookWnd;
	virtual CString GetTypeName();
}; 

class CUIPanel : public CPanel
{
public:
	CUIPanel(const CRect * prc, UINT uID);
	~CUIPanel();
	UINT m_uID;   // could be a resource ID or a HWND
	BOOL m_bOle;  // TRUE= m_uID is an ID of an ActiveX or OLE control, FALSE=regular windows control
	virtual CString GetTypeName();
};


class CVisualPanel : public CPanel
{
public:
	CVisualPanel();
	CVisualPanel(const CRect * prc);
	~CVisualPanel();
	virtual void Draw(CDC * pDC);
	BOOL m_bVisible;
	virtual CString GetTypeName();
	virtual void OnResized();
private:
	CRect m_rcPrev;
};

class CGripperPanel : public CVisualPanel
{
public:
	CGripperPanel();
	CGripperPanel(const CRect * prc);
	~CGripperPanel();
	virtual void Draw(CDC * pDC);
	virtual CString GetTypeName();
private:
	HTHEME m_hTheme;
	int m_iPartId;
	int m_iStateId;
	CString m_sClassName;
};

class CSplitterGripperPanel : public CVisualPanel
{
public:
	CSplitterGripperPanel(SplitterOrientation type);
	~CSplitterGripperPanel();
	virtual void Draw(CDC * pDC);
	virtual CString GetTypeName();
private:
	SplitterOrientation m_OrienType;
};

class CSplitPanel : public CPanel
{
public:
	CSplitPanel(CPanel * pPanel);
	~CSplitPanel();
	virtual BOOL SetAnchor(UINT anchor);
	virtual BOOL AddChild(CPanel * prc);
	virtual BOOL RemoveChild(CPanel * prc);
	virtual CString GetTypeName();
private:
	CPanel * m_pOriginalPanel;
};


class CSpitterPanel : public CPanel
{
public:
	CSpitterPanel(SplitterOrientation type);
	CSpitterPanel(const CRect * prc, SplitterOrientation type);
	~CSpitterPanel();
	virtual CString GetTypeName();
	CSplitterGripperPanel * m_pGrippePanel;
private:
	SplitterOrientation m_OrienType;
};


class CSplitContainer : public CPanel
{
public:
	CSplitContainer(CSplitPanel * pPanelA, CSplitPanel * pPanelB, SplitterOrientation type);
	~CSplitContainer();
	virtual void OnResized();
	virtual BOOL AddChild(CPanel * prc);
	virtual BOOL RemoveChild(CPanel * prc);
	virtual CString GetTypeName();
	void SetSplitterPosition(int leftOfSpliter /* or topOfSpliter if vertical */);
	int GetSplitterPosition();
	void SetFixedPanel(short nFixedPanel /* 1=left or top; 2=right or bototm; other=no fixed panel */);
	short GetFixedPanel();
	void SetIsSplitterFixed(BOOL bFixed);
	BOOL GetIsSplitterFixed();
	void SetShowSplitterGrip(BOOL bShow);
	BOOL GetShowSplitterGrip();

	static CSplitContainer * Create(CPanel * pPanelA, CPanel * pPanelB);

	SplitterOrientation m_Orientation;
private:
	BOOL m_IsSplitterFixed;
	short m_FixedPanel; // 1=left or top panel; 2=right or bottom panel, otherwise no fixed panel

	double m_nRatio;
	int m_nSplitterSize; // for horizontal, it is the splitter width, otherwise it is the splitter height
	void GetSplitArea(CRect * pSplitterPanel);
	int GetSplitterSize(CPanel * pLeftPanel, CPanel * pRightPanel);
	void UpdateRatio();

	CSplitPanel * m_pPanelA;
	CSplitPanel * m_pPanelB;
	CSpitterPanel * m_pSplitter;
};

class CFlowLayoutPanel : public CPanel
{
public:
	CFlowLayoutPanel();
	CFlowLayoutPanel(const CRect * prc);
	~CFlowLayoutPanel();
	virtual void OnResized();
	virtual CString GetTypeName();
	void SetFlowDirection(FlowDirection direction);
	FlowDirection GetFlowDirection();
	void SetItemSpacingX(int nSpace);
	int GetItemSpacingX();
	void SetItemSpacingY(int nSpace);
	int GetItemSpacingY();

private:
	int m_nItemSpacingX;
	int m_nItemSpacingY;
	FlowDirection m_nFlowDirection;
};

class CWndResizer 
{
public:
  CWndResizer(void);
  ~CWndResizer(void);
private:

public:
  BOOL SetAnchor(LPCTSTR panelName, UINT anchor);
  BOOL SetAnchor(UINT panelID, UINT anchor);
  BOOL GetAnchor(LPCTSTR panelName, UINT & anchor);
  BOOL GetAnchor(UINT panelID, UINT & anchor);


  BOOL SetDock(LPCTSTR panelName, UINT anchor);
  BOOL SetDock(UINT panelID, UINT anchor);
  BOOL GetDock(LPCTSTR panelName, UINT & anchor);
  BOOL GetDock(UINT panelID, UINT & anchor);

  BOOL SetFixedPanel(LPCTSTR splitContainerName, short panel);
  BOOL GetFixedPanel(LPCTSTR splitContainerName, short & panel);

  BOOL SetIsSplitterFixed(LPCTSTR splitContainerName, BOOL fixed);
  BOOL GetIsSplitterFixed(LPCTSTR splitContainerName, BOOL &fixed);

  BOOL SetFlowDirection(LPCTSTR flowPanelName, short direction);
  BOOL GetFlowDirection(LPCTSTR flowPanelName, short &direction);

  BOOL SetFlowItemSpacingX(LPCTSTR flowPanelName, int nSpacing);
  BOOL GetFlowItemSpacingX(LPCTSTR flowPanelName, int &nSpacing);

  BOOL SetFlowItemSpacingY(LPCTSTR flowPanelName, int nSpacing);
  BOOL GetFlowItemSpacingY(LPCTSTR flowPanelName, int &nSpacing);


  BOOL SetShowSplitterGrip(LPCTSTR splitContainerName, BOOL bShow);
  BOOL GetShowSplitterGrip(LPCTSTR splitContainerName, BOOL & bShow);

  BOOL SetParent(LPCTSTR panelName, LPCTSTR parentName);
  BOOL SetParent(UINT panelID, LPCTSTR parentName);
  BOOL SetParent(LPCTSTR panelName, UINT parentID);
  BOOL SetParent(UINT panelID, UINT parentID);
  BOOL GetParent(LPCTSTR panelName, CString & parentName);
  BOOL GetParent(UINT panelID, CString & parentName);

  BOOL SetMinimumSize(LPCTSTR panelName, CSize & size);
  BOOL SetMinimumSize(UINT panelID, CSize & size);
  BOOL GetMinimumSize(LPCTSTR panelName, CSize & size) ;
  BOOL GetMinimumSize(UINT panelID, CSize & size) ;

  BOOL SetMaximumSize(LPCTSTR panelName, CSize & size);
  BOOL SetMaximumSize(UINT panelID, CSize & size);
  BOOL GetMaximumSize(LPCTSTR panelName, CSize & size) ;
  BOOL GetMaximumSize(UINT panelID, CSize & size) ;

  void SetShowResizeGrip(BOOL show = TRUE);
  BOOL GetShowResizeGrip();
  BOOL Hook(CWnd * pWnd);
  BOOL Hook(CWnd * pWnd, CSize & size);
  BOOL Unhook();
  
  BOOL CreateFlowLayoutPanel(LPCTSTR panelName, const CRect * prcPanel);
  BOOL CreateFlowLayoutPanel(LPCTSTR panelName, const CUIntArray * parrID, BOOL setAsChildren = FALSE);

  BOOL CreatePanel(LPCTSTR panelName, const CRect * prcPanel);
  BOOL CreatePanel(LPCTSTR panelName, const CUIntArray * parrID, BOOL setAsChildren = FALSE);

  BOOL CreatePanel(UINT uID);

  BOOL CreateSplitContainer(LPCTSTR splitContainerName, LPCTSTR panelNameA, LPCTSTR panelNameB);    
  BOOL CreateSplitContainer(LPCTSTR splitContainerName, LPCTSTR panelNameA, UINT panelIDB);  
  BOOL CreateSplitContainer(LPCTSTR splitContainerName, UINT panelIDA, UINT panelIDB);  
  BOOL CreateSplitContainer(LPCTSTR splitContainerName, UINT panelIDA, LPCTSTR panelNameB); 

  // useful for persisting UI layout
  BOOL SetSplitterPosition(LPCTSTR splitContainerName, UINT position);  
  BOOL GetSplitterPosition(LPCTSTR splitContainerName, UINT & position);  

  BOOL InvokeOnResized();
  
  CString GetDebugInfo();
  
private:
  
  CWnd * m_pHookedWnd;
  CRootPanel root;
  CPanel * m_pCaptured;
  HCURSOR m_hOldCursor;
  int m_splitterOffset;  

  void OnPaint();
  void OnSize(UINT nType, int cx, int cy);
  void OnSizing(UINT fwSide, LPRECT pRect);
  void OnScroll();
  void OnDestroy();
	void OnLButtonDown(UINT nFlags, CPoint point);
	void OnMouseMove(UINT nFlags, CPoint point);
	void OnLButtonUp(UINT nFlags, CPoint point);

  CWndResizer::CPanel * FindPanelByName(CPanel * pRoot, LPCTSTR name);
  CWndResizer::CPanel * FindSplitterFromPoint(CPanel * pRoot, CPoint point);
  void GetUIPanels(CPanel * pRoot, CPanelList * pList, BOOL bOle);
  void GetVisualPanels(CPanel * pRoot, CPanelList * pList);

  void ResizeUI(CPanel * pRoot);

  CString IdToName(UINT uID);
  CWndResizer::CUIPanel * CreateUIPanel(UINT uID);
  CWndResizer::CUIPanel * GetUIPanel(UINT uID);

  void UpdateSplitterOffset(CPoint ptCurr);
  void GetDebugInfo(CPanel * pRoot, CString & info, CString  indent);
  void GetTrueClientRect(CWnd * pWnd, CRect * prc);
  void EnsureRootMinMax();

  WNDPROC m_pfnWndProc;
  static LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
};