ResizableGrip.h

// ResizableGrip.h: interface for the CResizableGrip class.
//
//
// Copyright (C) 2000-2002 by Paolo Messina
// (http://www.geocities.com/ppescher - [email protected])
//
// 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_)

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