resizablegrip.cpp

一个统计文件大小和程序信息的插件程序(vc或vc.net下使用)

// ResizableGrip.cpp: implementation of the CResizableGrip class.
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2000-2001 by Paolo Messina
// (http://www.geocities.com/ppescher - [e-mail])
//
// 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!
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "ResizableGrip.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CResizableGrip::CResizableGrip()
{
	m_sizeGrip.cx = GetSystemMetrics(SM_CXVSCROLL);
	m_sizeGrip.cy = GetSystemMetrics(SM_CYHSCROLL);
}

CResizableGrip::~CResizableGrip()
{

}

void CResizableGrip::UpdateGripPos()
{
	// size-grip goes bottom right in the client area
	// (any right-to-left adjustment should go here)

	RECT rect;
	GetResizableWnd()->GetClientRect(&rect);

	rect.left = rect.right - m_sizeGrip.cx;
	rect.top = rect.bottom - m_sizeGrip.cy;

	// must stay below other children
	m_wndGrip.SetWindowPos(&CWnd::wndBottom, rect.left, rect.top, 0, 0,
		SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOREPOSITION);

	// maximized windows cannot be resized
	if (GetResizableWnd()->IsZoomed())
		m_wndGrip.EnableWindow(FALSE);
	else
		m_wndGrip.EnableWindow(TRUE);
}

void CResizableGrip::ShowSizeGrip(BOOL bShow)
{
	m_wndGrip.ShowWindow(bShow ? SW_SHOW : SW_HIDE);
}

BOOL CResizableGrip::InitGrip()
{
	CRect rect(0 , 0, m_sizeGrip.cx, m_sizeGrip.cy);

	BOOL bRet = m_wndGrip.Create(WS_CHILD | WS_CLIPSIBLINGS | SBS_SIZEGRIP,
		rect, GetResizableWnd(), 0);

	if (bRet)
	{
		// set a triangular window region
		rect.OffsetRect(-rect.TopLeft());
		POINT aPoints[] =
		{
			{ rect.left, rect.bottom },
			{ rect.right, rect.bottom },
			{ rect.right, rect.top }
		};
		CRgn rgnGrip;
		rgnGrip.CreatePolygonRgn(aPoints, 3, WINDING);
		m_wndGrip.SetWindowRgn((HRGN)rgnGrip.Detach(), FALSE);

		// update pos
		UpdateGripPos();
		ShowSizeGrip();
	}

	return bRet;
}

LRESULT CResizableGrip::CSizeGrip::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
	if (message == WM_NCHITTEST)
	{
		// choose proper cursor shape
		if (IsRTL())
			return HTBOTTOMLEFT;
		else
			return HTBOTTOMRIGHT;
	}

	return CScrollBar::WindowProc(message, wParam, lParam);
}