// ResizableGrip.h: interface for the CResizableGrip class.
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2000-2002 by Paolo Messina
// (http://www.geocities.com/ppescher - ppescher@yahoo.com)
//
// The contents of this file are subject to the Artistic License (the "License").
// You may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.opensource.org/licenses/artistic-license.html
//
// If you find this code useful, credits would be nice!
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_RESIZABLEGRIP_H__INCLUDED_)
#define AFX_RESIZABLEGRIP_H__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CResizableGrip
{
private:
    class CSizeGrip : public CScrollBar
    {
    public:
        CSizeGrip()
        {
            m_bTransparent = FALSE;
            m_bTriangular = FALSE;
            m_size.cx = 0;
            m_size.cy = 0;
        }

        void SetTriangularShape(BOOL bEnable);
        void SetTransparency(BOOL bActivate);

        BOOL IsRTL();           // right-to-left layout support

        virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);

        SIZE m_size;            // holds grip size

    protected:
        virtual BOOL PreCreateWindow(CREATESTRUCT& cs);

        BOOL m_bTriangular;     // triangular shape active
        BOOL m_bTransparent;    // transparency active

        // memory DCs and bitmaps for transparent grip
        CDC m_dcGrip, m_dcMask;
        CBitmap m_bmGrip, m_bmMask;
    };

    CSizeGrip m_wndGrip;        // grip control
    int m_nShowCount;           // support for hiding the grip

protected:
    // create a size grip, with options
    BOOL CreateSizeGrip(BOOL bVisible = TRUE,
        BOOL bTriangular = TRUE, BOOL bTransparent = FALSE);

    BOOL IsSizeGripVisible();   // TRUE if grip is set to be visible
    void SetSizeGripVisibility(BOOL bVisible);  // set default visibility
    void UpdateSizeGrip();      // update the grip's visibility and position
    void ShowSizeGrip(DWORD* pStatus, DWORD dwMask = 1);    // temp show the size grip
    void HideSizeGrip(DWORD* pStatus, DWORD dwMask = 1);    // temp hide the size grip
    BOOL SetSizeGripBkMode(int nBkMode);        // like CDC::SetBkMode
    void SetSizeGripShape(BOOL bTriangular);

    virtual CWnd* GetResizableWnd() = 0;

public:
    CResizableGrip();
    virtual ~CResizableGrip();
};

#endif // !defined(AFX_RESIZABLEGRIP_H__INCLUDED_)