HyperlinkStatic.cpp

// JPEGsnoop - JPEG Image Decoder & Analysis Utility
// Copyright (C) 2017 - Calvin Hass
// http://www.impulseadventure.com/photo/jpeg-snoop.html
//
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 2 of the License, or
//    (at your option) any later version.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <http://www.gnu.org/licenses/>.
//


// ====================================================================================================
// SOURCE CODE ACKNOWLEDGEMENT
// ====================================================================================================
// The following code is derived from the following project on CodeGuru:
//
//		Title:		HyperlinkStatic
//		Author:		Franz Wong
//		URL:		http://www.codeguru.com/cpp/controls/staticctrl/article.php/c5801
//		Date:		Jan 14, 2003
//
// ====================================================================================================



// HyperlinkStatic.cpp : implementation file
//

#include "stdafx.h"
#include "HyperlinkStatic.h"

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

//CAL! Added the following as otherwise we need
//     to set WINVER >= 0x0500
#define IDC_HAND MAKEINTRESOURCE(32649)

/////////////////////////////////////////////////////////////////////////////
// CHyperlinkStatic

CHyperlinkStatic::CHyperlinkStatic()
{
	_strCaption = _strHyperlink = _T("");	 
	_bMouseInControl = _bCreateFont = _bGetCaptionSize = false;

	_hHandCursor = ::LoadCursor(0, IDC_HAND);
	_hArrowCursor = ::LoadCursor(0, IDC_ARROW);
}

CHyperlinkStatic::~CHyperlinkStatic()
{
}

BEGIN_MESSAGE_MAP(CHyperlinkStatic, CStatic)
	//{{AFX_MSG_MAP(CHyperlinkStatic)
	ON_WM_LBUTTONDOWN()
	ON_WM_PAINT()
	ON_WM_DESTROY()
	ON_WM_MOUSEMOVE()
	//}}AFX_MSG_MAP
	ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CHyperlinkStatic message handlers

void CHyperlinkStatic::SetHyperlink(CString strHyperlink)
{
	_strHyperlink = strHyperlink;
}

void CHyperlinkStatic::SetCaption(CString strCaption)
{
	_strCaption = strCaption;
	_bGetCaptionSize = false;	
}

void CHyperlinkStatic::OnLButtonDown(UINT nFlags, CPoint point) 
{
	if ( _bGetCaptionSize == false )
		GetCaptionSize();
	if (InCaptionRange(point))
		ShellExecute(0, _T("open"), _strHyperlink, 0, 0, SW_SHOWNORMAL);
	CStatic::OnLButtonDown(nFlags, point);
}

void CHyperlinkStatic::OnPaint() 
{	
	if ( _bCreateFont == false )
		CreateFont();
	CPaintDC dc(this);
	CFont *pOldFont = (CFont*)dc.SelectObject(&_fontCaption);
	dc.SetBkMode(TRANSPARENT);
	dc.SetTextColor(RGB(0,0,255));
	dc.TextOut(0, 0, _strCaption);
	dc.SelectObject(pOldFont);
}

void CHyperlinkStatic::OnDestroy() 
{
	CStatic::OnDestroy();
	_fontCaption.DeleteObject();
}

void CHyperlinkStatic::PreSubclassWindow() 
{
	ModifyStyle(0, SS_NOTIFY, TRUE);
	GetWindowText(_strCaption);
	_bGetCaptionSize = false;
	CStatic::PreSubclassWindow();
}

LRESULT CHyperlinkStatic::OnMouseLeave(WPARAM wParam, LPARAM lParam)
{
	lParam;	// Unreferenced param
	wParam;	// Unreferenced param
	_bMouseInControl = false;
	::SetCursor(_hArrowCursor);	
	return 0;
}

void CHyperlinkStatic::OnMouseMove(UINT nFlags, CPoint point) 
{
	if ( _bMouseInControl == false ) {
		//Track the mouse leave event
		TRACKMOUSEEVENT tme;
		tme.cbSize = sizeof(tme);
        tme.hwndTrack = GetSafeHwnd();
        tme.dwFlags = TME_LEAVE;        
		_TrackMouseEvent(&tme);
		_bMouseInControl = true;
	}
	else {
		if ( _bGetCaptionSize == false )
			GetCaptionSize();
		::SetCursor((InCaptionRange(point))?_hHandCursor:_hArrowCursor);		
	}
	CStatic::OnMouseMove(nFlags, point);
}

void CHyperlinkStatic::CreateFont()
{
	CFont* pFontParent = GetParent()->GetFont();	
	if ( pFontParent ) {
		LOGFONT lf;
		pFontParent->GetObject(sizeof(lf), &lf);
		lf.lfUnderline = TRUE;		
		_fontCaption.CreateFontIndirect(&lf);
		_bCreateFont = true;
	}
}

void CHyperlinkStatic::GetCaptionSize()
{
	if (( _bGetCaptionSize == false ) && ( _bCreateFont )) {
		CClientDC dc(this);
		CFont *pOldFont = dc.SelectObject(&_fontCaption);
		_sizeCaption = dc.GetTextExtent(_strCaption);
		dc.SelectObject(pOldFont);
		_bGetCaptionSize = true;
	}
}

bool CHyperlinkStatic::InCaptionRange(CPoint &point)
{
	if ( _bGetCaptionSize == false )
		return false;
	return (( point.x >= 0 )&&( point.x < _sizeCaption.cx ) &&
			( point.y >= 0 )&&( point.y < _sizeCaption.cy ));
}