575 lines
17 KiB
C++
575 lines
17 KiB
C++
// HyperLink.cpp : implementation file
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//
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// HyperLink static control.
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//
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// Copyright (C) 1997, 1998 Giancarlo Iovino (giancarlo@saria.com)
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// All rights reserved. May not be sold for profit.
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//
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// This code is based on CHyperlink by Chris Maunder.
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// "GotoURL" function by Stuart Patterson appeared in the Aug, 1997
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// Windows Developer's Journal.
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// "Default hand cursor" from Paul DiLascia's Jan 1998 MSJ article.
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#include "stdafx.h"
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#include "HLinkCtrl.h"
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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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#define TOOLTIP_ID 1
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#define SETBITS(dw, bits) (dw |= bits)
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#define CLEARBITS(dw, bits) (dw &= ~(bits))
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#define BITSET(dw, bit) (((dw) & (bit)) != 0L)
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/////////////////////////////////////////////////////////////////////////////
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// CHyperLink
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const DWORD CHyperLink::StyleUnderline = 0x00000001; // Underline bit
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const DWORD CHyperLink::StyleUseHover = 0x00000002; // Hand over coloring bit
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const DWORD CHyperLink::StyleAutoSize = 0x00000004; // Auto size bit
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const DWORD CHyperLink::StyleDownClick = 0x00000008; // Down click mode bit
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const DWORD CHyperLink::StyleGetFocusOnClick = 0x00000010; // Get focus on click bit
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const DWORD CHyperLink::StyleNoHandCursor = 0x00000020; // No hand cursor bit
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const DWORD CHyperLink::StyleNoActiveColor = 0x00000040; // No active color bit
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COLORREF CHyperLink::g_crLinkColor = RGB(0, 0, 255); // Blue
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COLORREF CHyperLink::g_crActiveColor = RGB(0, 128, 128); // Dark cyan
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COLORREF CHyperLink::g_crVisitedColor = RGB(128, 0, 128); // Purple
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COLORREF CHyperLink::g_crHoverColor = RGB(255, 0, 0 ); // Red
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HCURSOR CHyperLink::g_hLinkCursor = NULL; // No cursor
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CHyperLink::CHyperLink()
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{
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m_bOverControl = FALSE; // Cursor not yet over control
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m_bVisited = FALSE; // Link has not been visited yet
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m_bLinkActive = FALSE; // Control doesn't own the focus yet
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m_strURL.Empty(); // Set URL to an empty string
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// Set default styles
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m_dwStyle = StyleUnderline|StyleAutoSize|StyleGetFocusOnClick;
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}
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CHyperLink::~CHyperLink()
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{
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m_Font.DeleteObject();
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}
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IMPLEMENT_DYNAMIC(CHyperLink, CStatic)
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BEGIN_MESSAGE_MAP(CHyperLink, CStatic)
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//{{AFX_MSG_MAP(CHyperLink)
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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_LBUTTONUP()
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ON_WM_SETFOCUS()
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ON_WM_KILLFOCUS()
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ON_WM_KEYDOWN()
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ON_WM_NCHITTEST()
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ON_WM_LBUTTONDOWN()
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//}}AFX_MSG_MAP
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END_MESSAGE_MAP()
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/////////////////////////////////////////////////////////////////////////////
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// CHyperLink message handlers
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BOOL CHyperLink::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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void CHyperLink::PreSubclassWindow()
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{
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// If the URL string is empty try to set it to 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.
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// If it is, set it as URL string.
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CString strWndText;
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GetWindowText(strWndText);
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if (strWndText.IsEmpty()) {
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// Set the URL string as the window text
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ASSERT(!m_strURL.IsEmpty()); // window text and URL both NULL!
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CStatic::SetWindowText(m_strURL);
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}
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// Get the current window font
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CFont* pFont = GetFont();
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if (pFont != NULL) {
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LOGFONT lf;
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pFont->GetLogFont(&lf);
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lf.lfUnderline = BITSET(m_dwStyle, StyleUnderline);
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if (m_Font.CreateFontIndirect(&lf))
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CStatic::SetFont(&m_Font);
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// Adjust window size to fit URL if necessary
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AdjustWindow();
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}
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else {
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// if GetFont() returns NULL then probably the static
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// control is not of a text type: it's better to set
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// auto-resizing off
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CLEARBITS(m_dwStyle,StyleAutoSize);
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}
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if (!BITSET(m_dwStyle,StyleNoHandCursor))
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SetDefaultCursor(); // Try to load an "hand" cursor
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// Create the tooltip
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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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CStatic::PreSubclassWindow();
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}
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// Handler for WM_CTLCOLOR reflected message (see message map)
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HBRUSH CHyperLink::CtlColor(CDC* pDC, UINT nCtlColor)
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{
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ASSERT(nCtlColor == CTLCOLOR_STATIC);
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if (m_bOverControl && BITSET(m_dwStyle,StyleUseHover))
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pDC->SetTextColor(g_crHoverColor);
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else if (!BITSET(m_dwStyle,StyleNoActiveColor) && m_bLinkActive)
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pDC->SetTextColor(g_crActiveColor);
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else if (m_bVisited)
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pDC->SetTextColor(g_crVisitedColor);
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else
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pDC->SetTextColor(g_crLinkColor);
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// Set transparent drawing mode
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pDC->SetBkMode(TRANSPARENT);
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return (HBRUSH)GetStockObject(NULL_BRUSH);
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}
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void CHyperLink::OnMouseMove(UINT nFlags, CPoint point)
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{
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if (m_bOverControl) // Cursor currently over control
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{
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CRect rect;
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GetClientRect(rect);
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if (!rect.PtInRect(point))
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{
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m_bOverControl = FALSE;
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ReleaseCapture();
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Invalidate();
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return;
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}
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}
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else // Cursor has left control area
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{
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m_bOverControl = TRUE;
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Invalidate();
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SetCapture();
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}
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}
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//////////////////////////////////////////////////////////////////////////
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// "Normally, a static control does not get mouse events unless it has
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// SS_NOTIFY. This achieves the same effect as SS_NOTIFY, but it's fewer
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// lines of code and more reliable than turning on SS_NOTIFY in OnCtlColor
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// because Windows doesn't send WM_CTLCOLOR to bitmap static controls."
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// (Paul DiLascia)
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#if ADS<17
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UINT CHyperLink::OnNcHitTest(CPoint /*point*/)
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#else
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LRESULT CHyperLink::OnNcHitTest(CPoint /*point*/)
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#endif
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{
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return HTCLIENT;
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}
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void CHyperLink::OnLButtonDown(UINT /*nFlags*/, CPoint /*point*/)
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{
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if (BITSET(m_dwStyle,StyleGetFocusOnClick))
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SetFocus(); // Set the focus and make the link active
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if (BITSET(m_dwStyle,StyleDownClick))
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FollowLink();
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m_bLinkActive = TRUE;
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}
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void CHyperLink::OnLButtonUp(UINT /*nFlags*/, CPoint /*point*/)
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{
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if (m_bLinkActive && !BITSET(m_dwStyle,StyleDownClick))
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FollowLink();
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}
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BOOL CHyperLink::OnSetCursor(CWnd* /*pWnd*/, UINT /*nHitTest*/, UINT /*message*/)
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{
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if (g_hLinkCursor)
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{
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::SetCursor(g_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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void CHyperLink::OnSetFocus(CWnd* /*pOldWnd*/)
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{
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m_bLinkActive = TRUE;
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Invalidate(); // Repaint to set the focus
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}
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void CHyperLink::OnKillFocus(CWnd* /*pNewWnd*/)
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{
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// Assume that control lost focus = mouse out
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// this avoid troubles with the Hover color
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m_bOverControl = FALSE;
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m_bLinkActive = FALSE;
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Invalidate(); // Repaint to unset the focus
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}
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void CHyperLink::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
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{
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if (nChar == VK_SPACE)
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FollowLink();
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else
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CStatic::OnKeyDown(nChar, nRepCnt, nFlags);
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}
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/////////////////////////////////////////////////////////////////////////////
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// CHyperLink operations
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void CHyperLink::SetColors( COLORREF crLinkColor,
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COLORREF crActiveColor,
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COLORREF crVisitedColor,
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COLORREF crHoverColor /* = -1 */)
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{
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g_crLinkColor = crLinkColor;
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g_crActiveColor = crActiveColor;
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g_crVisitedColor = crVisitedColor;
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if (crHoverColor == -1)
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g_crHoverColor = ::GetSysColor(COLOR_HIGHLIGHT);
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else
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g_crHoverColor = crHoverColor;
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}
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void CHyperLink::SetColors(HYPERLINKCOLORS& linkColors) {
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g_crLinkColor = linkColors.crLink;
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g_crActiveColor = linkColors.crActive;
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g_crVisitedColor = linkColors.crVisited;
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g_crHoverColor = linkColors.crHover;
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}
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void CHyperLink::GetColors(HYPERLINKCOLORS& linkColors) {
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linkColors.crLink = g_crLinkColor;
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linkColors.crActive = g_crActiveColor;
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linkColors.crVisited = g_crVisitedColor;
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linkColors.crHover = g_crHoverColor;
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}
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void CHyperLink::SetLinkCursor(HCURSOR hCursor) {
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ASSERT(hCursor != NULL);
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g_hLinkCursor = hCursor;
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if (g_hLinkCursor == NULL)
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SetDefaultCursor();
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}
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HCURSOR CHyperLink::GetLinkCursor() {
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return g_hLinkCursor;
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}
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BOOL CHyperLink:: ModifyLinkStyle(DWORD dwRemove, DWORD dwAdd,
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BOOL bApply /* =TRUE */)
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{
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// Check if we are adding and removing the same style
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if ((dwRemove & dwAdd) != 0L)
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return FALSE;
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// Remove old styles and set the new ones
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CLEARBITS(m_dwStyle, dwRemove);
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SETBITS(m_dwStyle, dwAdd);
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if (bApply && ::IsWindow(GetSafeHwnd())) {
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// If possible, APPLY the new styles on the fly
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if (BITSET(dwAdd,StyleUnderline) || BITSET(dwRemove,StyleUnderline))
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SwitchUnderline();
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if (BITSET(dwAdd,StyleAutoSize))
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AdjustWindow();
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if (BITSET(dwRemove,StyleUseHover))
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Invalidate();
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}
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return TRUE;
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}
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DWORD CHyperLink::GetLinkStyle() const {
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return m_dwStyle;
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}
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void CHyperLink::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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ShowWindow(SW_HIDE);
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AdjustWindow();
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m_ToolTip.UpdateTipText(strURL, this, TOOLTIP_ID);
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ShowWindow(SW_SHOW);
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}
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}
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CString CHyperLink::GetURL() const {
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return m_strURL;
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}
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void CHyperLink::SetWindowText(LPCTSTR lpszText)
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{
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ASSERT(lpszText != NULL);
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if (::IsWindow(GetSafeHwnd())) {
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// Set the window text and adjust its size while the window
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// is kept hidden in order to allow dynamic modification
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ShowWindow(SW_HIDE); // Hide window
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// Call the base class SetWindowText()
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CStatic::SetWindowText(lpszText);
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// Resize the control if necessary
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AdjustWindow();
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ShowWindow(SW_SHOW); // Show window
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}
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}
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void CHyperLink::SetFont(CFont* pFont)
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{
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ASSERT(::IsWindow(GetSafeHwnd()));
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ASSERT(pFont != NULL);
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// Set the window font and adjust its size while the window
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// is kept hidden in order to allow dynamic modification
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ShowWindow(SW_HIDE); // Hide window
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LOGFONT lf;
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// Create the new font
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pFont->GetLogFont(&lf);
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m_Font.DeleteObject();
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m_Font.CreateFontIndirect(&lf);
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// Call the base class SetFont()
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CStatic::SetFont(&m_Font);
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// Resize the control if necessary
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AdjustWindow();
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ShowWindow(SW_SHOW); // Show window
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}
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// Function to set underline on/off
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void CHyperLink::SwitchUnderline()
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{
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LOGFONT lf;
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CFont* pFont = GetFont();
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if (pFont != NULL) {
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pFont->GetLogFont(&lf);
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lf.lfUnderline = BITSET(m_dwStyle,StyleUnderline);
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m_Font.DeleteObject();
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m_Font.CreateFontIndirect(&lf);
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SetFont(&m_Font);
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}
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}
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// Move and resize the window so that its client area has the same size
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// as the hyperlink text. This prevents the hyperlink cursor being active
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// when it is not over the text.
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void CHyperLink::AdjustWindow()
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{
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ASSERT(::IsWindow(GetSafeHwnd()));
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if (!BITSET(m_dwStyle,StyleAutoSize))
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return;
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// Get the current window rect
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CRect rcWnd;
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GetWindowRect(rcWnd);
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// For a child CWnd object, window rect is relative to the
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// upper-left corner of the parent window’s client area.
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CWnd* pParent = GetParent();
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if (pParent)
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pParent->ScreenToClient(rcWnd);
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// Get the current client rect
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CRect rcClient;
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GetClientRect(rcClient);
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// Calc border size based on window and client rects
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int borderWidth = rcWnd.Width() - rcClient.Width();
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int borderHeight = rcWnd.Height() - rcClient.Height();
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// Get the extent of 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_Font);
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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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// Get the text justification style
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DWORD dwStyle = GetStyle();
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// Recalc window size and position based on text justification
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if (BITSET(dwStyle, SS_CENTERIMAGE))
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rcWnd.DeflateRect(0, (rcWnd.Height() - Extent.cy) / 2);
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else
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rcWnd.bottom = rcWnd.top + Extent.cy;
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if (BITSET(dwStyle, SS_CENTER))
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rcWnd.DeflateRect((rcWnd.Width() - Extent.cx) / 2, 0);
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else if (BITSET(dwStyle,SS_RIGHT))
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rcWnd.left = rcWnd.right - Extent.cx;
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else // SS_LEFT
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rcWnd.right = rcWnd.left + Extent.cx;
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// Move and resize the window
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MoveWindow(rcWnd.left, rcWnd.top, rcWnd.Width() + borderWidth,
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rcWnd.Height() + borderHeight);
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}
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void CHyperLink::SetVisited(BOOL bVisited /* = TRUE */) {
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m_bVisited = bVisited;
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}
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BOOL CHyperLink::IsVisited() const {
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return m_bVisited;
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}
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/////////////////////////////////////////////////////////////////////////////
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// CHyperLink implementation
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// The following function appeared in Paul DiLascia's Jan 1998
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// MSJ articles. It loads a "hand" cursor from "winhlp32.exe"
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// resources
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void CHyperLink::SetDefaultCursor()
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{
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if (g_hLinkCursor == NULL) // No cursor handle - load our own
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{
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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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HCURSOR hHandCursor = ::LoadCursor(hModule, MAKEINTRESOURCE(106));
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if (hHandCursor)
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g_hLinkCursor = CopyCursor(hHandCursor);
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}
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FreeLibrary(hModule);
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}
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}
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LONG CHyperLink::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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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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lstrcpy(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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// Error report function
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void CHyperLink::ReportError(LONG_PTR nError)
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{
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CString str;
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switch (nError) {
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case 0: str = _T("The operating system is out\nof memory or resources."); break;
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case ERROR_FILE_NOT_FOUND: str = _T("The specified file was not found."); break;
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case ERROR_PATH_NOT_FOUND: str = _T("The specified path was not found."); break;
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case ERROR_BAD_FORMAT: str = _T("The .EXE file is invalid\n(non-Win32 .EXE or error in .EXE image)."); break;
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case SE_ERR_ACCESSDENIED: str = _T("The operating system denied\naccess to the specified file."); break;
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case SE_ERR_ASSOCINCOMPLETE: str = _T("The filename association is\nincomplete or invalid."); break;
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case SE_ERR_DDEBUSY: str = _T("The DDE transaction could not\nbe completed because other DDE transactions\nwere being processed."); break;
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case SE_ERR_DDEFAIL: str = _T("The DDE transaction failed."); break;
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case SE_ERR_DDETIMEOUT: str = _T("The DDE transaction could not\nbe completed because the request timed out."); break;
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case SE_ERR_DLLNOTFOUND: str = _T("The specified dynamic-link library was not found."); break;
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//case SE_ERR_FNF: str = _T("Windows 95 only: The specified file was not found."); break;
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case SE_ERR_NOASSOC: str = _T("There is no application associated\nwith the given filename extension."); break;
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case SE_ERR_OOM: str = _T("There was not enough memory to complete the operation."); break;
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//case SE_ERR_PNF: str = _T("The specified path was not found."); break;
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case SE_ERR_SHARE: str = _T("A sharing violation occurred. "); break;
|
||
default: str.Format(_T("Unknown Error (%d) occurred."), nError); break;
|
||
}
|
||
|
||
str = _T("Can't open link:\n\n") + str;
|
||
AfxMessageBox(str, MB_ICONEXCLAMATION | MB_OK);
|
||
}
|
||
|
||
// "GotoURL" function by Stuart Patterson
|
||
// As seen in the August, 1997 Windows Developer's Journal.
|
||
HINSTANCE CHyperLink::GotoURL(LPCTSTR url, int showcmd)
|
||
{
|
||
TCHAR key[MAX_PATH + MAX_PATH];
|
||
|
||
// First try ShellExecute()
|
||
HINSTANCE result = ShellExecute(NULL, _T("open"), url, NULL,NULL, showcmd);
|
||
|
||
// If it failed, get the .htm regkey and lookup the program
|
||
if ((LONG_PTR)result <= HINSTANCE_ERROR) {
|
||
|
||
if (GetRegKey(HKEY_CLASSES_ROOT, _T(".htm"), key) == ERROR_SUCCESS) {
|
||
lstrcat(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+lstrlen(key)-1;
|
||
else
|
||
*pos = '\0'; // Remove the parameter
|
||
}
|
||
else
|
||
*pos = '\0'; // Remove the parameter
|
||
|
||
lstrcat(pos, _T(" "));
|
||
lstrcat(pos, url);
|
||
result = (HINSTANCE) WinExec(_AS(key),showcmd);
|
||
}
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
// Activate the link
|
||
void CHyperLink::FollowLink()
|
||
{
|
||
LONG_PTR result = (LONG_PTR) GotoURL(m_strURL, SW_SHOW);
|
||
if (result <= HINSTANCE_ERROR) {
|
||
MessageBeep(MB_ICONEXCLAMATION); // Unable to follow link
|
||
ReportError(result);
|
||
} else {
|
||
// Mark link as visited and repaint window
|
||
m_bVisited = TRUE;
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
void CHyperLink::SetUnderAndOver(BOOL flag)
|
||
{
|
||
DWORD dwRemove=0L, dwAdd=0L;
|
||
if (flag)
|
||
dwAdd = CHyperLink::StyleUnderline | CHyperLink::StyleUseHover;
|
||
else
|
||
dwRemove = CHyperLink::StyleUnderline | CHyperLink::StyleUseHover;
|
||
ModifyLinkStyle(dwRemove, dwAdd);
|
||
}
|