630 lines
17 KiB
C++
630 lines
17 KiB
C++
// XHyperLink.cpp Version 1.0
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//
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// XHyperLink static control. Will open the default browser with the given URL
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// when the user clicks on the link.
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//
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// Copyright (C) 1997 - 1999 Chris Maunder
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// All rights reserved. May not be sold for profit.
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//
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// Thanks to Pål K. Tønder for auto-size and window caption changes.
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//
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// "GotoURL" function by Stuart Patterson
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// As seen in the August, 1997 Windows Developer's Journal.
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// Copyright 1997 by Miller Freeman, Inc. All rights reserved.
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// Modified by Chris Maunder to use TCHARs instead of chars.
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//
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// "Default hand cursor" from Paul DiLascia's Jan 1998 MSJ article.
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//
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// 2/29/00 -- P. Shaffer standard font mod.
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// Modified by: Hans Dietrich
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// hdietrich@gmail.com
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include "XHyperLink.h"
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#include "atlconv.h" // for Unicode conversion
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#ifdef _DEBUG
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#define new DEBUG_NEW
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#undef THIS_FILE
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static char THIS_FILE[] = __FILE__;
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#endif
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#pragma warning(disable : 4996) // This function or variable may be unsafe
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#define TOOLTIP_ID 1
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// Uncomment following line to enable error message box for URL navigation
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//#define XHYPERLINK_REPORT_ERROR
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#ifndef IDC_HAND
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#define IDC_HAND MAKEINTRESOURCE(32649) // From WINUSER.H
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#endif
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// sends message to parent when hyperlink is clicked (see SetNotifyParent())
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UINT WM_XHYPERLINK_CLICKED = ::RegisterWindowMessage(_T("WM_XHYPERLINK_CLICKED"));
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///////////////////////////////////////////////////////////////////////////////
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// CXHyperLink
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BEGIN_MESSAGE_MAP(CXHyperLink, CStatic)
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//{{AFX_MSG_MAP(CXHyperLink)
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ON_WM_CTLCOLOR_REFLECT()
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ON_WM_SETCURSOR()
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ON_WM_MOUSEMOVE()
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ON_WM_TIMER()
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ON_CONTROL_REFLECT(STN_CLICKED, OnClicked)
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ON_WM_ERASEBKGND()
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//}}AFX_MSG_MAP
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END_MESSAGE_MAP()
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///////////////////////////////////////////////////////////////////////////////
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// ctor
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CXHyperLink::CXHyperLink()
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{
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m_hLinkCursor = NULL; // No cursor as yet
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m_crLinkColour = RGB(0,0,238); // Blue
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m_crVisitedColour = RGB(85,26,139); // Purple
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m_crHoverColour = RGB(255,0,0); // Red
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m_bOverControl = FALSE; // Cursor not yet over control
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m_bVisited = FALSE; // Hasn't been visited yet.
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m_nUnderline = ulHover; // Underline the link?
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m_bAdjustToFit = TRUE; // Resize the window to fit the text?
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m_strURL = _T("");
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m_nTimerID = 100;
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m_bNotifyParent = FALSE; // TRUE = notify parent
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m_bIsURLEnabled = TRUE; // TRUE = navigate to url
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m_bToolTip = TRUE; // TRUE = display tooltip
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m_crBackground = (UINT) -1; // set to default (no bg color)
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m_bAlwaysOpenNew = FALSE; // TRUE = always open new browser window
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}
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///////////////////////////////////////////////////////////////////////////////
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// dtor
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CXHyperLink::~CXHyperLink()
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{
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TRACE(_T("in CXHyperLink::~CXHyperLink\n"));
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if (m_hLinkCursor)
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DestroyCursor(m_hLinkCursor);
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m_hLinkCursor = NULL;
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m_UnderlineFont.DeleteObject();
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if (m_Brush.GetSafeHandle())
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m_Brush.DeleteObject();
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}
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/////////////////////////////////////////////////////////////////////////////
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// CXHyperLink overrides
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///////////////////////////////////////////////////////////////////////////////
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// DestroyWindow
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BOOL CXHyperLink::DestroyWindow()
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{
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KillTimer(m_nTimerID);
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return CStatic::DestroyWindow();
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}
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///////////////////////////////////////////////////////////////////////////////
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// PreTranslateMessage
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BOOL CXHyperLink::PreTranslateMessage(MSG* pMsg)
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{
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m_ToolTip.RelayEvent(pMsg);
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return CStatic::PreTranslateMessage(pMsg);
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}
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///////////////////////////////////////////////////////////////////////////////
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// PreSubclassWindow
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void CXHyperLink::PreSubclassWindow()
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{
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// We want to get mouse clicks via STN_CLICKED
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DWORD dwStyle = GetStyle();
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::SetWindowLong(GetSafeHwnd(), GWL_STYLE, dwStyle | SS_NOTIFY);
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// Set the URL as the window text
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if (m_strURL.IsEmpty())
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GetWindowText(m_strURL);
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// Check that the window text isn't empty. If it is, set it as the URL.
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CString strWndText;
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GetWindowText(strWndText);
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if (strWndText.IsEmpty())
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{
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ASSERT(!m_strURL.IsEmpty()); // Window and URL both NULL. DUH!
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SetWindowText(m_strURL);
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}
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CFont* pFont = GetFont();
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if (!pFont)
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{
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HFONT hFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
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if (hFont == NULL)
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hFont = (HFONT) GetStockObject(ANSI_VAR_FONT);
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if (hFont)
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pFont = CFont::FromHandle(hFont);
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}
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ASSERT(pFont->GetSafeHandle());
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// Create the underline font
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LOGFONT lf;
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pFont->GetLogFont(&lf);
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m_StdFont.CreateFontIndirect(&lf);
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lf.lfUnderline = (BYTE) TRUE;
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m_UnderlineFont.CreateFontIndirect(&lf);
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PositionWindow(); // Adjust size of window to fit URL if necessary
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SetDefaultCursor(); // Try and load up a "hand" cursor
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SetUnderline();
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// Create the tooltip
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if (m_bToolTip)
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{
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CRect rect;
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GetClientRect(rect);
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m_ToolTip.Create(this);
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m_ToolTip.AddTool(this, m_strURL, rect, TOOLTIP_ID);
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}
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CStatic::PreSubclassWindow();
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}
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/////////////////////////////////////////////////////////////////////////////
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// CXHyperLink message handlers
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///////////////////////////////////////////////////////////////////////////////
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// OnClicked
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void CXHyperLink::OnClicked()
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{
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m_bOverControl = FALSE;
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int result = HINSTANCE_ERROR + 1;
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if (m_bIsURLEnabled)
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result = (int)(INT_PTR)GotoURL(m_strURL, SW_SHOW, m_bAlwaysOpenNew);
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m_bVisited = (result > HINSTANCE_ERROR);
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if (!m_bVisited)
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{
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MessageBeep(MB_ICONEXCLAMATION); // Unable to follow link
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ReportError(result);
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}
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else
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SetVisited(); // Repaint to show visited colour
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NotifyParent();
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}
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///////////////////////////////////////////////////////////////////////////////
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// CtlColor
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#ifdef _DEBUG
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HBRUSH CXHyperLink::CtlColor(CDC* pDC, UINT nCtlColor)
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#else
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HBRUSH CXHyperLink::CtlColor(CDC* pDC, UINT /*nCtlColor*/)
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#endif
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{
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ASSERT(nCtlColor == CTLCOLOR_STATIC);
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if (m_bOverControl)
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pDC->SetTextColor(m_crHoverColour);
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else if (m_bVisited)
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pDC->SetTextColor(m_crVisitedColour);
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else
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pDC->SetTextColor(m_crLinkColour);
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// transparent text.
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pDC->SetBkMode(TRANSPARENT);
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if (m_Brush.GetSafeHandle())
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{
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pDC->SetBkColor(m_crBackground);
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return (HBRUSH) m_Brush;
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}
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else
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{
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return (HBRUSH)GetStockObject(NULL_BRUSH);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// OnMouseMove
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void CXHyperLink::OnMouseMove(UINT nFlags, CPoint point)
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{
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if (!m_bOverControl) // Cursor has just moved over control
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{
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m_bOverControl = TRUE;
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if (m_nUnderline == ulHover)
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SetFont(&m_UnderlineFont);
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Invalidate();
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SetTimer(m_nTimerID, 100, NULL);
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}
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CStatic::OnMouseMove(nFlags, point);
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}
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///////////////////////////////////////////////////////////////////////////////
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// OnTimer
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void CXHyperLink::OnTimer(UINT nIDEvent)
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{
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CPoint p(GetMessagePos());
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ScreenToClient(&p);
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CRect rect;
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GetClientRect(rect);
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if (!rect.PtInRect(p))
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{
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m_bOverControl = FALSE;
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KillTimer(m_nTimerID);
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if (m_nUnderline != ulAlways)
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SetFont(&m_StdFont);
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rect.bottom+=10;
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InvalidateRect(rect);
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}
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CStatic::OnTimer(nIDEvent);
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}
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///////////////////////////////////////////////////////////////////////////////
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// OnSetCursor
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BOOL CXHyperLink::OnSetCursor(CWnd* /*pWnd*/, UINT /*nHitTest*/, UINT /*message*/)
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{
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if (m_hLinkCursor)
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{
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::SetCursor(m_hLinkCursor);
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return TRUE;
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}
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return FALSE;
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}
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///////////////////////////////////////////////////////////////////////////////
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// OnEraseBkgnd
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BOOL CXHyperLink::OnEraseBkgnd(CDC* pDC)
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{
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CRect rect;
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GetClientRect(rect);
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if (m_crBackground != (UINT)-1)
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pDC->FillSolidRect(rect, m_crBackground);
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else
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pDC->FillSolidRect(rect, ::GetSysColor(COLOR_3DFACE));
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return TRUE;
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}
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/////////////////////////////////////////////////////////////////////////////
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// CXHyperLink operations
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///////////////////////////////////////////////////////////////////////////////
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// SetURL
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void CXHyperLink::SetURL(CString strURL)
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{
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m_strURL = strURL;
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if (::IsWindow(GetSafeHwnd()))
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{
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PositionWindow();
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m_ToolTip.UpdateTipText(strURL, this, TOOLTIP_ID);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// SetColours
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void CXHyperLink::SetColours(COLORREF crLinkColour,
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COLORREF crVisitedColour,
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COLORREF crHoverColour /* = -1 */)
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{
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m_crLinkColour = crLinkColour;
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m_crVisitedColour = crVisitedColour;
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if (crHoverColour == -1)
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m_crHoverColour = ::GetSysColor(COLOR_HIGHLIGHT);
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else
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m_crHoverColour = crHoverColour;
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if (::IsWindow(m_hWnd))
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Invalidate();
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}
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///////////////////////////////////////////////////////////////////////////////
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// SetBackgroundColour
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void CXHyperLink::SetBackgroundColour(COLORREF crBackground)
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{
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m_crBackground = crBackground;
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if (m_Brush.GetSafeHandle())
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m_Brush.DeleteObject();
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m_Brush.CreateSolidBrush(m_crBackground);
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}
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///////////////////////////////////////////////////////////////////////////////
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// SetVisited
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void CXHyperLink::SetVisited(BOOL bVisited /* = TRUE */)
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{
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m_bVisited = bVisited;
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if (::IsWindow(GetSafeHwnd()))
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Invalidate();
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}
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///////////////////////////////////////////////////////////////////////////////
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// SetLinkCursor
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void CXHyperLink::SetLinkCursor(HCURSOR hCursor)
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{
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m_hLinkCursor = hCursor;
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if (m_hLinkCursor == NULL)
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SetDefaultCursor();
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}
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///////////////////////////////////////////////////////////////////////////////
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// SetUnderline
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void CXHyperLink::SetUnderline(int nUnderline /*=ulHover*/)
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{
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if (m_nUnderline == nUnderline)
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return;
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if (::IsWindow(GetSafeHwnd()))
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{
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if (nUnderline == ulAlways)
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SetFont(&m_UnderlineFont);
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else
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SetFont(&m_StdFont);
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Invalidate();
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}
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m_nUnderline = nUnderline;
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}
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///////////////////////////////////////////////////////////////////////////////
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// SetAutoSize
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void CXHyperLink::SetAutoSize(BOOL bAutoSize /* = TRUE */)
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{
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m_bAdjustToFit = bAutoSize;
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if (::IsWindow(GetSafeHwnd()))
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PositionWindow();
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}
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///////////////////////////////////////////////////////////////////////////////
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// SetWindowText
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void CXHyperLink::SetWindowText(LPCTSTR lpszString)
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{
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ASSERT(lpszString);
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if (!lpszString)
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return;
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CStatic::SetWindowText(_T(""));
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RedrawWindow();
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CStatic::SetWindowText(lpszString);
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PositionWindow();
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}
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///////////////////////////////////////////////////////////////////////////////
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// PositionWindow
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// Move and resize the window so that the window is the same size
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// as the hyperlink text. This stops the hyperlink cursor being active
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// when it is not directly over the text. If the text is left justified
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// then the window is merely shrunk, but if it is centred or right
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// justified then the window will have to be moved as well.
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//
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// Suggested by Pål K. Tønder
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//
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void CXHyperLink::PositionWindow()
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{
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if (!::IsWindow(GetSafeHwnd()) || !m_bAdjustToFit)
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return;
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// Get the current window position
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CRect WndRect, ClientRect;
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GetWindowRect(WndRect);
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GetClientRect(ClientRect);
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ClientToScreen(ClientRect);
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CWnd* pParent = GetParent();
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if (pParent)
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{
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pParent->ScreenToClient(WndRect);
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pParent->ScreenToClient(ClientRect);
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}
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// Get the size of the window text
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CString strWndText;
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GetWindowText(strWndText);
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CDC* pDC = GetDC();
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CFont* pOldFont = pDC->SelectObject(&m_UnderlineFont);
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CSize Extent = pDC->GetTextExtent(strWndText);
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pDC->SelectObject(pOldFont);
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ReleaseDC(pDC);
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// Adjust for window borders
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Extent.cx += WndRect.Width() - ClientRect.Width();
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Extent.cy += WndRect.Height() - ClientRect.Height();
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// Get the text justification via the window style
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DWORD dwStyle = GetStyle();
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// Recalc the window size and position based on the text justification
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if (dwStyle & SS_CENTERIMAGE)
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WndRect.DeflateRect(0, (WndRect.Height() - Extent.cy)/2);
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else
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WndRect.bottom = WndRect.top + Extent.cy;
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if (dwStyle & SS_CENTER)
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WndRect.DeflateRect((WndRect.Width() - Extent.cx)/2, 0);
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else if (dwStyle & SS_RIGHT)
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WndRect.left = WndRect.right - Extent.cx;
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else // SS_LEFT = 0, so we can't test for it explicitly
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WndRect.right = WndRect.left + Extent.cx;
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// Move the window
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SetWindowPos(NULL,
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WndRect.left, WndRect.top,
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WndRect.Width(), WndRect.Height(),
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SWP_NOZORDER);
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}
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/////////////////////////////////////////////////////////////////////////////
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// CXHyperLink implementation
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///////////////////////////////////////////////////////////////////////////////
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// SetDefaultCursor
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void CXHyperLink::SetDefaultCursor()
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{
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if (m_hLinkCursor == NULL) // No cursor handle - try to load one
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{
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// First try to load the Win98 / Windows 2000 hand cursor
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TRACE(_T("loading from IDC_HAND\n"));
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m_hLinkCursor = AfxGetApp()->LoadStandardCursor(IDC_HAND);
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if (m_hLinkCursor == NULL) // Still no cursor handle -
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// load the WinHelp hand cursor
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{
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// The following appeared in Paul DiLascia's Jan 1998 MSJ articles.
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// It loads a "hand" cursor from the winhlp32.exe module.
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TRACE(_T("loading from winhlp32\n"));
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// Get the windows directory
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CString strWndDir;
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GetWindowsDirectory(strWndDir.GetBuffer(MAX_PATH), MAX_PATH);
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strWndDir.ReleaseBuffer();
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strWndDir += _T("\\winhlp32.exe");
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// This retrieves cursor #106 from winhlp32.exe, which is a hand pointer
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HMODULE hModule = LoadLibrary(strWndDir);
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if (hModule)
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{
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HCURSOR hHandCursor = ::LoadCursor(hModule, MAKEINTRESOURCE(106));
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if (hHandCursor)
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m_hLinkCursor = CopyCursor(hHandCursor);
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FreeLibrary(hModule);
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}
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// GetRegKey
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LONG CXHyperLink::GetRegKey(HKEY key, LPCTSTR subkey, LPTSTR retdata)
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{
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HKEY hkey;
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LONG retval = RegOpenKeyEx(key, subkey, 0, KEY_QUERY_VALUE, &hkey);
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if (retval == ERROR_SUCCESS)
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{
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long datasize = MAX_PATH;
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TCHAR data[MAX_PATH];
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RegQueryValue(hkey, NULL, data, &datasize);
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_tcscpy(retdata, data);
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RegCloseKey(hkey);
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}
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return retval;
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}
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///////////////////////////////////////////////////////////////////////////////
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// ReportError
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void CXHyperLink::ReportError(int nError)
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{
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#ifdef XHYPERLINK_REPORT_ERROR
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CString str;
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switch (nError)
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{
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case 0: str = "The operating system is out\nof memory or resources."; break;
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case SE_ERR_PNF: str = "The specified path was not found."; break;
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case SE_ERR_FNF: str = "The specified file was not found."; break;
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case ERROR_BAD_FORMAT: str = "The .EXE file is invalid\n(non-Win32 .EXE or error in .EXE image)."; break;
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case SE_ERR_ACCESSDENIED: str = "The operating system denied\naccess to the specified file."; break;
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case SE_ERR_ASSOCINCOMPLETE: str = "The filename association is\nincomplete or invalid."; break;
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case SE_ERR_DDEBUSY: str = "The DDE transaction could not\nbe completed because other DDE transactions\nwere being processed."; break;
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case SE_ERR_DDEFAIL: str = "The DDE transaction failed."; break;
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case SE_ERR_DDETIMEOUT: str = "The DDE transaction could not\nbe completed because the request timed out."; break;
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case SE_ERR_DLLNOTFOUND: str = "The specified dynamic-link library was not found."; break;
|
|
case SE_ERR_NOASSOC: str = "There is no application associated\nwith the given filename extension."; break;
|
|
case SE_ERR_OOM: str = "There was not enough memory to complete the operation."; break;
|
|
case SE_ERR_SHARE: str = "A sharing violation occurred. ";
|
|
default: str.Format(_T("Unknown Error (%d) occurred."), nError); break;
|
|
}
|
|
str = "Unable to open hyperlink:\n\n" + str;
|
|
AfxMessageBox(str, MB_ICONEXCLAMATION | MB_OK);
|
|
|
|
#else
|
|
|
|
UNUSED_ALWAYS(nError);
|
|
|
|
#endif // XHYPERLINK_REPORT_ERROR
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// NotifyParent
|
|
void CXHyperLink::NotifyParent()
|
|
{
|
|
if (m_bNotifyParent)
|
|
{
|
|
CWnd *pParent = GetParent();
|
|
if (pParent && ::IsWindow(pParent->m_hWnd))
|
|
{
|
|
// wParam will contain control id
|
|
pParent->SendMessage(WM_XHYPERLINK_CLICKED, GetDlgCtrlID());
|
|
}
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// GotoURL
|
|
HINSTANCE CXHyperLink::GotoURL(LPCTSTR url, int showcmd, BOOL bAlwaysOpenNew /*= FALSE*/)
|
|
{
|
|
// if no url then this is not an internet link
|
|
if (!url || url[0] == _T('\0'))
|
|
return (HINSTANCE) HINSTANCE_ERROR + 1;
|
|
|
|
TCHAR key[MAX_PATH*2];
|
|
|
|
// First try ShellExecute()
|
|
TCHAR *verb = _T("open");
|
|
if (bAlwaysOpenNew)
|
|
verb = _T("new");
|
|
HINSTANCE result = ShellExecute(NULL, verb, url, NULL,NULL, showcmd);
|
|
|
|
// If it failed, get the .htm regkey and lookup the program
|
|
if (result <= (HINSTANCE)HINSTANCE_ERROR)
|
|
{
|
|
if (GetRegKey(HKEY_CLASSES_ROOT, _T(".htm"), key) == ERROR_SUCCESS)
|
|
{
|
|
_tcscat(key, _T("\\shell\\open\\command"));
|
|
|
|
if (GetRegKey(HKEY_CLASSES_ROOT,key,key) == ERROR_SUCCESS)
|
|
{
|
|
TCHAR *pos;
|
|
pos = _tcsstr(key, _T("\"%1\""));
|
|
if (pos == NULL)
|
|
{ // No quotes found
|
|
pos = _tcsstr(key, _T("%1")); // Check for %1, without quotes
|
|
if (pos == NULL) // No parameter at all...
|
|
pos = key + _tcslen(key)-1;
|
|
else
|
|
*pos = _T('\0'); // Remove the parameter
|
|
}
|
|
else
|
|
{
|
|
*pos = _T('\0'); // Remove the parameter
|
|
}
|
|
|
|
_tcscat(pos, _T(" "));
|
|
_tcscat(pos, url);
|
|
|
|
USES_CONVERSION;
|
|
result = (HINSTANCE) (UINT_PTR) WinExec(T2A(key),showcmd);
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|