HyperLink让CStatic实现超链接

// HyperLink.cpp : implementation file // // HyperLink static control. Will open the default browser with the given URL // when the user clicks on the link. // // Copyright (C) 1997, 1998 Chris Maunder (chrismaunder@codeguru.com) // All rights reserved. May not be sold for profit. // As seen in the August, 1997 Windows Developer's Journal. // Copyright 1997 by Miller Freeman, Inc. All rights reserved. // Modified by Chris Maunder to use TCHARs instead of chars. // // "Default hand cursor" from Paul DiLascia's Jan 1998 MSJ article. // #include "stdafx.h" #include "HyperLink.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif #define TOOLTIP_ID 1 ///////////////////////////////////////////////////////////////////////////// // CHyperLink CHyperLink::CHyperLink() { m_hLinkCursor = NULL; // No cursor as yet m_crLinkColour = RGB( 0, 0, 238); // Blue m_crVisitedColour = RGB( 85, 26, 139); // Purple m_crHoverColour = ::GetSysColor(COLOR_HIGHLIGHT); m_bOverControl = FALSE; // Cursor not yet over control m_bVisited = FALSE; // Hasn't been visited yet. m_bUnderline = TRUE; // Underline the link? m_bAdjustToFit = TRUE; // Resize the window to fit the text? m_strURL.Empty(); } CHyperLink::~CHyperLink() { m_Font.DeleteObject(); } BEGIN_MESSAGE_MAP(CHyperLink, CStatic) //{{AFX_MSG_MAP(CHyperLink) ON_CONTROL_REFLECT(STN_CLICKED, OnClicked) ON_WM_CTLCOLOR_REFLECT() ON_WM_SETCURSOR() ON_WM_MOUSEMOVE() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CHyperLink message handlers BOOL CHyperLink::PreTranslateMessage(MSG* pMsg) { m_ToolTip.RelayEvent(pMsg); return CStatic::PreTranslateMessage(pMsg); } void CHyperLink::OnClicked() { int result = (int)GotoURL(m_strURL, SW_SHOW); m_bVisited = (result > HINSTANCE_ERROR); if (!m_bVisited) { MessageBeep(MB_ICONEXCLAMATION); // Unable to follow link ReportError(result); } else SetVisited(); // Repaint to show visited colour } HBRUSH CHyperLink::CtlColor(CDC* pDC, UINT nCtlColor) { ASSERT(nCtlColor == CTLCOLOR_STATIC); if (m_bOverControl) pDC->SetTextColor(m_crHoverColour); else if (m_bVisited) pDC->SetTextColor(m_crVisitedColour); else pDC->SetTextColor(m_crLinkColour); // transparent text. pDC->SetBkMode(TRANSPARENT); return (HBRUSH)GetStockObject(NULL_BRUSH); } void CHyperLink::OnMouseMove(UINT nFlags, CPoint point) { CStatic::OnMouseMove(nFlags, point); if (m_bOverControl) // Cursor is currently over control { CRect rect; GetClientRect(rect); if (!rect.PtInRect(point)) { m_bOverControl = FALSE; ReleaseCapture(); RedrawWindow(); return; } } else // Cursor has just moved over control { m_bOverControl = TRUE; RedrawWindow(); SetCapture(); } } BOOL CHyperLink::OnSetCursor(CWnd* /*pWnd*/, UINT /*nHitTest*/, UINT /*message*/) { if (m_hLinkCursor) { ::SetCursor(m_hLinkCursor); return TRUE; } return FALSE; } void CHyperLink::PreSubclassWindow() { // We want to get mouse clicks via STN_CLICKED DWORD dwStyle = GetStyle(); ::SetWindowLong(GetSafeHwnd(), GWL_STYLE, dwStyle | SS_NOTIFY); // Set the URL as the window text if (m_strURL.IsEmpty()) GetWindowText(m_strURL); // Check that the window text isn't empty. If it is, set it as the URL. CString strWndText; GetWindowText(strWndText); if (strWndText.IsEmpty()) { ASSERT(!m_strURL.IsEmpty()); // Window and URL both NULL. DUH! SetWindowText(m_strURL); } // Create the font LOGFONT lf; GetFont()->GetLogFont(&lf); lf.lfUnderline = m_bUnderline; m_Font.CreateFontIndirect(&lf); SetFont(&m_Font); PositionWindow(); // Adjust size of window to fit URL if necessary SetDefaultCursor(); // Try and load up a "hand" cursor // Create the tooltip CRect rect; GetClientRect(rect); m_ToolTip.Create(this); m_ToolTip.AddTool(this, m_strURL, rect, TOOLTIP_ID); CStatic::PreSubclassWindow(); } ///////////////////////////////////////////////////////////////////////////// // CHyperLink operations void CHyperLink::SetURL(CString strURL) { m_strURL = strURL; if (::IsWindow(GetSafeHwnd())) { PositionWindow(); m_ToolTip.UpdateTipText(strURL, this, TOOLTIP_ID); } } CString CHyperLink::GetURL() const { return m_strURL; } void CHyperLink::SetColours(COLORREF crLinkColour, COLORREF crVisitedColour, COLORREF crHoverColour /* = -1 */) { m_crLinkColour = crLinkColour; m_crVisitedColour = crVisitedColour; if (crHoverColour == -1) m_crHoverColour = ::GetSysColor(COLOR_HIGHLIGHT); else m_crHoverColour = crHoverColour; if (::IsWindow(m_hWnd)) Invalidate(); } COLORREF CHyperLink::GetLinkColour() const { return m_crLinkColour; } COLORREF CHyperLink::GetVisitedColour() const { return m_crVisitedColour; } COLORREF CHyperLink::GetHoverColour() const { return m_crHoverColour; } void CHyperLink::SetVisited(BOOL bVisited /* = TRUE */) { m_bVisited = bVisited; if (::IsWindow(GetSafeHwnd())) Invalidate(); } BOOL CHyperLink::GetVisited() const { return m_bVisited; } void CHyperLink::SetLinkCursor(HCURSOR hCursor) { m_hLinkCursor = hCursor; if (m_hLinkCursor == NULL) SetDefaultCursor(); } HCURSOR CHyperLink::GetLinkCursor() const { return m_hLinkCursor; } void CHyperLink::SetUnderline(BOOL bUnderline /* = TRUE */) { m_bUnderline = bUnderline; if (::IsWindow(GetSafeHwnd())) { LOGFONT lf; GetFont()->GetLogFont(&lf); lf.lfUnderline = m_bUnderline; m_Font.DeleteObject(); m_Font.CreateFontIndirect(&lf); SetFont(&m_Font); Invalidate(); } } BOOL CHyperLink::GetUnderline() const { return m_bUnderline; } void CHyperLink::SetAutoSize(BOOL bAutoSize /* = TRUE */) { m_bAdjustToFit = bAutoSize; if (::IsWindow(GetSafeHwnd())) PositionWindow(); } BOOL CHyperLink::GetAutoSize() const { return m_bAdjustToFit; } // Move and resize the window so that the window is the same size // as the hyperlink text. This stops the hyperlink cursor being active // when it is not directly over the text. If the text is left justified // then the window is merely shrunk, but if it is centred or right // justified then the window will have to be moved as well. // // Suggested by P�l K. T�nder void CHyperLink::PositionWindow() { if (!::IsWindow(GetSafeHwnd()) || !m_bAdjustToFit) return; // Get the current window position CRect rect; GetWindowRect(rect); CWnd* pParent = GetParent(); if (pParent) pParent->ScreenToClient(rect); // Get the size of the window text CString strWndText; GetWindowText(strWndText); CDC* pDC = GetDC(); CFont* pOldFont = pDC->SelectObject(&m_Font); CSize Extent = pDC->GetTextExtent(strWndText); pDC->SelectObject(pOldFont); ReleaseDC(pDC); // Get the text justification via the window style DWORD dwStyle = GetStyle(); // Recalc the window size and position based on the text justification if (