statlink.cpp

游戏编程精华02－含有几十个游戏编程例子

/* Copyright (C) Greg James, 2001. 
 * All rights reserved worldwide.
 *
 * This software is provided "as is" without express or implied
 * warranties. You may freely copy and compile this source into
 * applications you distribute provided that the copyright text
 * below is included in the resulting source code, for example:
 * "Portions Copyright (C) Greg James, 2001"
 */
////////////////////////////////////////////////////////////////
// CStaticLink 1997 Microsoft Systems Journal. 
// If this program works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.
//
// CStaticLink implements a static control that's a hyperlink
// to any file on your desktop or web. You can use it in dialog boxes
// to create hyperlinks to web sites. When clicked, opens the file/URL
//
#include "StdAfx.h"
#include "StatLink.h"

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

IMPLEMENT_DYNAMIC(CStaticLink, CStatic)

BEGIN_MESSAGE_MAP(CStaticLink, CStatic)
	ON_WM_CTLCOLOR_REFLECT()
	ON_CONTROL_REFLECT(STN_CLICKED, OnClicked)
END_MESSAGE_MAP()

///////////////////
// Constructor sets default colors = blue/purple.
//
CStaticLink::CStaticLink()
{
	m_colorUnvisited = RGB(0,0,255);		 // blue
	m_colorVisited   = RGB(128,0,128);	 // purple
	m_bVisited       = FALSE;				 // not visited yet
}

//////////////////
// Handle reflected WM_CTLCOLOR to set custom control color.
// For a text control, use visited/unvisited colors and underline font.
// For non-text controls, do nothing. Also ensures SS_NOTIFY is on.
//
HBRUSH CStaticLink::CtlColor(CDC* pDC, UINT nCtlColor)
{
	ASSERT(nCtlColor == CTLCOLOR_STATIC);
	DWORD dwStyle = GetStyle();
	if (!(dwStyle & SS_NOTIFY)) {
		// Turn on notify flag to get mouse messages and STN_CLICKED.
		// Otherwise, I'll never get any mouse clicks!
		::SetWindowLong(m_hWnd, GWL_STYLE, dwStyle | SS_NOTIFY);
	}
	
	HBRUSH hbr = NULL;
	if ((dwStyle & 0xFF) <= SS_RIGHT) {

		// this is a text control: set up font and colors
		if (!(HFONT)m_font) {
			// first time init: create font
			LOGFONT lf;
			GetFont()->GetObject(sizeof(lf), &lf);
			lf.lfUnderline = TRUE;
			m_font.CreateFontIndirect(&lf);
		}

		// use underline font and visited/unvisited colors
		pDC->SelectObject(&m_font);
		pDC->SetTextColor(m_bVisited ? m_colorVisited : m_colorUnvisited);
		pDC->SetBkMode(TRANSPARENT);

		// return hollow brush to preserve parent background color
		hbr = (HBRUSH)::GetStockObject(HOLLOW_BRUSH);
	}
	return hbr;
}

/////////////////
// Handle mouse click: open URL/file.
//
void CStaticLink::OnClicked()
{
	if (m_link.IsEmpty())		// if URL/filename not set..
		GetWindowText(m_link);	// ..get it from window text

	// Call ShellExecute to run the file.
	// For an URL, this means opening it in the browser.
	//
	HINSTANCE h = ShellExecute(NULL, "open", m_link, NULL, NULL, SW_SHOWNORMAL);
	if ((UINT)h > 32) {
		m_bVisited = TRUE;	// (not really--might not have found link)
		Invalidate();			// repaint to show visited color
	} else {
		MessageBeep(0);		// unable to execute file!
		TRACE(_T("*** WARNING: CStaticLink: unable to execute file %s\n"),
			(LPCTSTR)m_link);
	}
}