Custom Captions (Including Multi-line Captions)

////////////////////////////
// An extended multi-line caption class with fixes for the Windows 95/NT caption
// overwrite 'feature' that causes a normal window caption to be drawn
// when non-client area mouse activity occurs after the system menu has been 
// displayed.
//
//	Author: Dave Lorde	(dlorde@cix.compulink.co.uk)
//
//          Copyright January 2000
//

#include "StdAfx.h"
#include "MultiLineCaptionEx.h"
#include "SuppressStyle.h"

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

IMPLEMENT_DYNAMIC(CMultiLineCaptionEx, CMultiLineCaption); 

namespace {
	const int CaptionMouseClick = 0xF012;
}

CMultiLineCaptionEx::CMultiLineCaptionEx(int maxLines)
	:CMultiLineCaption(maxLines)
{}

LRESULT CMultiLineCaptionEx::WindowProc(UINT msg, WPARAM wp, LPARAM lp)
{
	switch (msg) 
	{
	case WM_SETCURSOR:
		return OnSetCursor( (HWND)wp, LOWORD(lp), HIWORD(lp) );

	case WM_SYSCOMMAND:
		OnSysCommand(wp, lp );
		return 0;

	case WM_SIZE:
		OnSize((UINT)wp, LOWORD(lp), HIWORD(lp));
		return 0;

	case WM_INITMENUPOPUP:
		OnInitMenuPopup( CMenu::FromHandle((HMENU)wp), LOWORD(lp), HIWORD(lp));
		return 0;
	}
	// I don't handle it: pass along
	return CMultiLineCaption::WindowProc(msg, wp, lp);
}


void CMultiLineCaptionEx::OnSysCommand(UINT nID, LPARAM lp)
{
	// I don't know why, but clicking on the caption triggers a SysCommand
	// with ID 0xf12. Unless the caption is painted before handling it,
	// the nasty caption line shows

	if (nID == CaptionMouseClick)
		PaintCaption();

	Default();
}

BOOL CMultiLineCaptionEx::OnSetCursor( HWND hWnd, UINT nHitTest, UINT message )
{
	LRESULT res = 0;
	{
		SuppressStyle ss(hWnd, WS_VISIBLE);

		res = Default();

		if (nHitTest != HTHSCROLL && nHitTest != HTVSCROLL && nHitTest != HTSYSMENU &&
	 		nHitTest != HTTRANSPARENT  && nHitTest != HTNOWHERE && nHitTest != HTCLIENT)
		{
			PaintCaption();
		}
	}
	return res;
}

void CMultiLineCaptionEx::OnSize(UINT nType, int cx, int cy)
{
//	SuppressStyle ss(m_pWndHooked->m_hWnd, WS_VISIBLE);

//	Default();
	CMultiLineCaption::OnSize(nType, cx, cy);
	
//	PaintCaption();
}

void CMultiLineCaptionEx::OnInitMenuPopup(CMenu* pMenu, UINT nIndex, BOOL bSysMenu)
{
	SuppressStyle ss(m_pWndHooked->m_hWnd, WS_VISIBLE);

	Default();
		
	PaintCaption();
}