statichandset.cpp

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// StaticHandset.cpp : implementation file
//

#include "stdafx.h"
#include "StaticHandset.h"

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


/////////////////////////////////////////////////////////////////////////////
// CStaticHandset

/////////////////////////////////////////////////////////////////////////////
// CStaticHandset message handlers
#define TOOLTIP_ID      1
/////////////////////////////////////////////////////////////////////////////
//CStaticHandset

CStaticHandset::CStaticHandset()
{
	m_hLinkCursor=NULL;//Nocursorasyet
	m_crLinkColour=RGB(128,128,128);//Blue
	m_crVisitedColour=RGB(128,128,128);//Purple
	m_crHoverColour=RGB(128,128,128);
	m_bOverControl=FALSE;//Cursornotyetovercontrol
	m_bVisited=FALSE;//Hasn'tbeenvisitedyet.
	m_bUnderline=TRUE;//Underlinethelink?
	m_bAdjustToFit=TRUE;//Resizethewindowtofitthetext?
	m_strURL.Empty();
}

CStaticHandset::~CStaticHandset()
{
	m_Font.DeleteObject();
}


BEGIN_MESSAGE_MAP(CStaticHandset,CStatic)
//{{AFX_MSG_MAP(CStaticHandset)
ON_CONTROL_REFLECT(STN_CLICKED,OnClicked)
ON_WM_CTLCOLOR_REFLECT()
ON_WM_SETCURSOR()
ON_WM_MOUSEMOVE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
//CHyperLinkmessagehandlers

void CStaticHandset::PreSubclassWindow()
{
	//TODO:Addyourspecializedcodehereand/orcallthebaseclass
	
	//WewanttogetmouseclicksviaSTN_CLICKED
	DWORD dwStyle=GetStyle();
	::SetWindowLong(GetSafeHwnd(),GWL_STYLE,dwStyle|SS_NOTIFY);
	
	//SettheURLasthewindowtext
	if(m_strURL.IsEmpty())
		GetWindowText(m_strURL);
	
	//Checkthatthewindowtextisn'tempty.Ifitis,setitastheURL.
	CString strWndText;
	GetWindowText(strWndText);
	if(strWndText.IsEmpty())
	{
		ASSERT(!m_strURL.IsEmpty());//Windowand URL both NULL.DUH!
		SetWindowText(m_strURL);
	}
	
	//Createthefont
	LOGFONT lf;
	GetFont()->GetLogFont(&lf);
	lf.lfUnderline=m_bUnderline;
	m_Font.CreateFontIndirect(&lf);
	SetFont(&m_Font);
	
	PositionWindow();//AdjustsizeofwindowtofitURLifnecessary
	SetDefaultCursor();//Tryandloadupa"hand"cursor
	
	//Createthetooltip
	CRect rect;
	GetClientRect(rect);
	m_ToolTip.Create(this);
	m_ToolTip.AddTool(this,m_strURL,rect,TOOLTIP_ID);
	
	CStatic::PreSubclassWindow();
}

void CStaticHandset::OnClicked()
{
	int result=(int)GotoURL(m_strURL,SW_SHOW);
	m_bVisited=(result>HINSTANCE_ERROR);
	if(!m_bVisited)
	{
		MessageBeep(MB_ICONEXCLAMATION);//Unabletofollowlink
		ReportError(result);
	}
	else
		SetVisited();//Repainttoshowvisitedcolour
}

BOOL CStaticHandset::PreTranslateMessage(MSG*pMsg)
{
	//TODO:Addyourspecializedcodehereand/orcallthebaseclass
	m_ToolTip.RelayEvent(pMsg);
	return CStatic::PreTranslateMessage(pMsg);
}

HBRUSH CStaticHandset::CtlColor(CDC*pDC,UINT nCtlColor)
{
	//TODO:ChangeanyattributesoftheDChere
	ASSERT(nCtlColor==CTLCOLOR_STATIC);
	
	if(m_bOverControl)
		pDC->SetTextColor(m_crHoverColour);
	else if(m_bVisited)
		pDC->SetTextColor(m_crVisitedColour);
	else
		pDC->SetTextColor(m_crLinkColour);
	
	//transparenttext.
	pDC->SetBkMode(TRANSPARENT);
	return(HBRUSH)GetStockObject(NULL_BRUSH);
	//TODO:Returnanon-NULLbrushiftheparent'shandlershouldnotbecalled
	//returnNULL;
}

BOOL CStaticHandset::OnSetCursor(CWnd*pWnd,UINT nHitTest,UINT message)
{
	//TODO:Addyourmessagehandlercodehereand/orcalldefault
	if(m_hLinkCursor)
	{
		::SetCursor(m_hLinkCursor);
		return TRUE;
	}
	return FALSE;
	//returnCStatic::OnSetCursor(pWnd,nHitTest,message);
}

void CStaticHandset::OnMouseMove(UINT nFlags,CPoint point)
{
	//TODO:Addyourmessagehandlercodehereand/orcalldefault
	if(m_bOverControl)//Cursoriscurrentlyovercontrol
	{
		CRect rect;
		GetClientRect(rect);
		
		if(!rect.PtInRect(point))
		{
			m_bOverControl=FALSE;
			ReleaseCapture();
			RedrawWindow();
			return;
		}
	}
	else//Cursorhasjustmovedovercontrol
	{
		m_bOverControl=TRUE;
		RedrawWindow();
		SetCapture();
	}
	CStatic::OnMouseMove(nFlags,point);
}

/////////////////////////////////////////////////////////////////////////////
//CHyperLinkoperations

void CStaticHandset::SetURL(CString strURL)
{
	m_strURL=strURL;
	
	if(::IsWindow(GetSafeHwnd()))
	{
		PositionWindow();
		m_ToolTip.UpdateTipText(strURL,this,TOOLTIP_ID);
	}
}

CString CStaticHandset::GetURL()const
{
	return m_strURL;
}

void CStaticHandset::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 CStaticHandset::GetLinkColour()const
{
	return m_crLinkColour;
}

COLORREF CStaticHandset::GetVisitedColour()const
{
	return m_crVisitedColour;
}

COLORREF CStaticHandset::GetHoverColour()const
{
	return m_crHoverColour;
}

void CStaticHandset::SetVisited(BOOL bVisited/*=TRUE*/)
{
	m_bVisited=bVisited;
	
	if(::IsWindow(GetSafeHwnd()))
		Invalidate();
}

BOOL CStaticHandset::GetVisited()const
{
	return m_bVisited;
}

void CStaticHandset::SetLinkCursor(HCURSOR hCursor)
{
	m_hLinkCursor=hCursor;//
	if(m_hLinkCursor==NULL)
		SetDefaultCursor();
}

HCURSOR CStaticHandset::GetLinkCursor()const
{
	return m_hLinkCursor;
}

void CStaticHandset::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 CStaticHandset::GetUnderline()const
{
	return m_bUnderline;
}

void CStaticHandset::SetAutoSize(BOOL bAutoSize/*=TRUE*/)
{
	m_bAdjustToFit=bAutoSize;
	
	if(::IsWindow(GetSafeHwnd()))
		PositionWindow();
}

BOOL CStaticHandset::GetAutoSize()const
{
	return m_bAdjustToFit;
}

//Moveandresizethewindowsothatthewindowisthesamesize
//asthehyperlinktext.Thisstopsthehyperlinkcursorbeingactive
//whenitisnotdirectlyoverthetext.Ifthetextisleftjustified
//thenthewindowismerelyshrunk,butifitiscentredorright
//justifiedthenthewindowwillhavetobemovedaswell.

void CStaticHandset::PositionWindow()
{
	if(!::IsWindow(GetSafeHwnd())||!m_bAdjustToFit)
		return;
	
	//Getthecurrentwindowposition
	CRect rect;
	GetWindowRect(rect);
	
	CWnd*pParent=GetParent();
	if(pParent)
		pParent->ScreenToClient(rect);
	
	//Getthesizeofthewindowtext
	CString strWndText;
	GetWindowText(strWndText);
	
	CDC*pDC=GetDC();
	CFont*pOldFont=pDC->SelectObject(&m_Font);
	CSize Extent=pDC->GetTextExtent(strWndText);
	pDC->SelectObject(pOldFont);
	ReleaseDC(pDC);
	
	//Getthetextjustificationviathewindowstyle
	DWORD dwStyle=GetStyle();
	
	//Recalcthewindowsizeandpositionbasedonthetextjustification
	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,sowecan'ttestforitexplicitly
		rect.right=rect.left+Extent.cx;
	
	//Movethewindow
	SetWindowPos(NULL,rect.left,rect.top,rect.Width(),rect.Height(),SWP_NOZORDER);
}

/////////////////////////////////////////////////////////////////////////////
//CHyperLinkimplementation

//ThefollowingappearedinPaulDiLascia'sJan1998MSJarticles.
//Itloadsa"hand"cursorfromthewinhlp32.exemodule
void CStaticHandset::SetDefaultCursor()
{
	if(m_hLinkCursor==NULL)//Nocursorhandle-loadourown
	{
		//Getthewindowsdirectory
		CString strWndDir;
		GetWindowsDirectory(strWndDir.GetBuffer(MAX_PATH),MAX_PATH);
		strWndDir.ReleaseBuffer();
		
		strWndDir+=_T("\\winhlp32.exe");
		//Thisretrievescursor#106fromwinhlp32.exe,whichisahandpointer
		HMODULE hModule=LoadLibrary(strWndDir);
		if(hModule)
		{
			HCURSOR hHandCursor=::LoadCursor(hModule,MAKEINTRESOURCE(106));
			if(hHandCursor)
				m_hLinkCursor=CopyCursor(hHandCursor);
		}
		FreeLibrary(hModule);
	}
}

LONG CStaticHandset::GetRegKey(HKEY key,LPCTSTR subkey,LPTSTR retdata)
{
	HKEY hkey;
	LONG retval=RegOpenKeyEx(key,subkey,0,KEY_QUERY_VALUE,&hkey);
	
	if(retval==ERROR_SUCCESS){
		long datasize=MAX_PATH;
		TCHAR data[MAX_PATH];
		RegQueryValue(hkey,NULL,data,&datasize);
		lstrcpy(retdata,data);
		RegCloseKey(hkey);
	}
	
	return retval;
}

void CStaticHandset::ReportError(int nError)
{
	CString str;
	switch(nError)
	{
	case 0:
		str="Theoperatingsystemisout\nofmemoryorresources.";
		break;
	case SE_ERR_PNF:
		str="Thespecifiedpathwasnotfound.";
		break;
	case SE_ERR_FNF:
		str="Thespecifiedfilewasnotfound.";
		break;
	case ERROR_BAD_FORMAT:
		str="The.EXEfileisinvalid\n(non-Win32.EXEorerrorin.EXEimage).";
		break;
	case SE_ERR_ACCESSDENIED:
		str="Theoperatingsystemdenied\naccesstothespecifiedfile.";
		break;
	case SE_ERR_ASSOCINCOMPLETE:
		str="Thefilenameassociationis\nincompleteorinvalid.";
		break;
	case SE_ERR_DDEBUSY:
		str="TheDDEtransactioncouldnot\nbecompletedbecauseotherDDEtransactions\nwerebeingprocessed.";
		break;
	case SE_ERR_DDEFAIL:
		str="TheDDEtransactionfailed.";
		break;
	case SE_ERR_DDETIMEOUT:
		str="TheDDEtransactioncouldnot\nbecompletedbecausetherequesttimedout.";
		break;
	case SE_ERR_DLLNOTFOUND:
		str="Thespecifieddynamic-linklibrarywasnotfound.";
		break;
	case SE_ERR_NOASSOC:
		str="Thereisnoapplicationassociated\nwiththegivenfilenameextension.";
		break;
	case SE_ERR_OOM:
		str="Therewasnotenoughmemorytocompletetheoperation.";
		break;
	case SE_ERR_SHARE:
		str="Asharingviolationoccurred.";
	default:
		str.Format("UnknownError(%d)occurred.",nError);
		break;
	}
	str="Unabletoopenhyperlink:\n\n"+str;
	AfxMessageBox(str,MB_ICONEXCLAMATION|MB_OK);
}

HINSTANCE CStaticHandset::GotoURL(LPCTSTR url,int showcmd)
{
	TCHAR key[MAX_PATH+MAX_PATH];
	
	//FirsttryShellExecute()
	HINSTANCE result=ShellExecute(NULL,_T("open"),url,NULL,NULL,showcmd);
	
	//Ifitfailed,getthe.htmregkeyandlookuptheprogram
	if((UINT)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)
				{//Noquotesfound
					pos=strstr(key,_T("%1"));//Checkfor%1,withoutquotes
					if(pos==NULL)//Noparameteratall...
						pos=key+lstrlen(key)-1;
					else
						*pos='\0';//Removetheparameter
				}
				else
					*pos='\0';//Removetheparameter
				
				lstrcat(pos,_T(""));
				lstrcat(pos,url);
				result=(HINSTANCE)WinExec(key,showcmd);
			}
		}
	}
	
	return result;
}