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// 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. // // Thanks to P�l K. T�nder for auto-size and window caption changes. // // "GotoURL" function by Stuart Patterson // 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 BEGIN_MESSAGE_MAP(CHyperLink, CStatic) //{{AFX_MSG_MAP(CHyperLink) ON_CONTROL_REFLECT(STN_CLICKED, OnClicked) ON_WM_CTLCOLOR_REFLECT() ON_WM_TIMER() ON_WM_SETCURSOR() ON_WM_DESTROY() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CHyperLink CHyperLink::CHyperLink() { m_hLinkCursor = NULL; // No cursor as yet m_crLinkColor = RGB( 0, 0, 255); // Blue m_crVisitedColor = RGB( 85, 26, 139); // Purple m_crHoverColor = RGB( 255, 0, 0); // Red 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(); if (m_hLinkCursor) DestroyCursor(m_hLinkCursor); } ///////////////////////////////////////////////////////////////////////////// // CHyperLink message handlers BOOL CHyperLink::PreTranslateMessage(MSG* pMsg) { m_ToolTip.RelayEvent(pMsg); return CStatic::PreTranslateMessage(pMsg); } void CHyperLink::OnClicked() { m_bVisited = TRUE; //(result > HINSTANCE_ERROR); SetVisited(); // Repaint to show visited Color GotoURL(m_strURL, SW_SHOW); } HBRUSH CHyperLink::CtlColor(CDC* pDC, UINT) { if (m_bOverControl) pDC->SetTextColor(m_crHoverColor); else if (m_bVisited) pDC->SetTextColor(m_crVisitedColor); else pDC->SetTextColor(m_crLinkColor); // transparent text. pDC->SetBkMode(TRANSPARENT); return (HBRUSH)GetStockObject(NULL_BRUSH); } 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 = (unsigned char) 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); SetTimer(1, 100, NULL); 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::SetColors(COLORREF crLinkColor, COLORREF crVisitedColor, COLORREF crHoverColor /* = -1 */) { m_crLinkColor = crLinkColor; m_crVisitedColor = crVisitedColor; if (crHoverColor == -1) m_crHoverColor = ::GetSysColor(COLOR_HIGHLIGHT); else m_crHoverColor = crHoverColor; if (::IsWindow(m_hWnd)) Invalidate(); } COLORREF CHyperLink::GetLinkColor() const { return m_crLinkColor; } COLORREF CHyperLink::GetVisitedColor() const { return m_crVisitedColor; } COLORREF CHyperLink::GetHoverColor() const { return m_crHoverColor; } 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 = (unsigned char) 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. // 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 (dwStyle & SS_CENTERIMAGE) rect.DeflateRect(0, (rect.Height() - Extent.cy)/2); else rect.bottom = rect.top + Extent.cy; if (dwStyle & SS_CENTER) rect.DeflateRect((rect.Width() - Extent.cx)/2, 0); else if (dwStyle & SS_RIGHT) rect.left = rect.right - Extent.cx; else // SS_LEFT = 0, so we can't test for it explicitly rect.right = rect.left + Extent.cx; // Move the window SetWindowPos(NULL, rect.left, rect.top, rect.Width(), rect.Height(), SWP_NOZORDER); } ///////////////////////////////////////////////////////////////////////////// // CH