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Label.cpp
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// Label.cpp : implementation file
//
#include "stdafx.h"
#include "Label.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
BEGIN_MESSAGE_MAP(CLabel, CStatic)
//{{AFX_MSG_MAP(CLabel)
ON_WM_TIMER()
ON_WM_LBUTTONDOWN()
ON_WM_SETCURSOR()
ON_WM_SYSCOLORCHANGE()
ON_WM_PAINT()
ON_WM_ERASEBKGND()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.2
//
// From now on I'll try to keep a log of fixes and enhancements...
//
// The new feature were added due to the response of people.
// All I ask is to all you programmers out there, is if you add, fix or
// enhance this code, sent me a copy and I'll send the copy on to www.codeproject.com
//
// Happy Software Engineer :)
//
// New features include:
//
// A. Support for 3D Fonts
// B. Support for background transparency
// C. More comments provided
// D. If alignment is 'centered' and the window text is seperated by '\r\n'
// the will be centered accordingly - requested by someone @ nasa ;)
// E. Support for font rotation.
// F. Respond to System Color Change
// G. OnPaint improved performance - using Double Buffering Technique
//
// Thanks to:
// Mark McDowell - For suggestion on 'Increasing the flexibility of "hypertext" setting...'
// Erich Ruth - For suggestion on 'Font Rotation'
//
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.3
//
// A. Added SS_LEFTNOWORDWRAP to include wordwrap
// B. Fix repainting problem
// C. Fix SetBkColor
// D. Added SS_CENTER
// Thanks to:
// Marius - Added styling problem.
// Azing Vondeling & Broker - Spotting painting Problem.
// Mel Stober - Back Color & SS_CENTER
//
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.4
//
// A. Fix to transparency mode
// B. Added new SetText3DHiliteColor to change the 3D Font face color - default is white.
//
// Thanks to:
// michael.groeger - Spotting Transparency with other controls bug.
//
//
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.5
//
// A. Sanity handle check
// B. Support Interface Charset
// C. Check compilition with _UNICODE
// D. Fix hyperlink feature
// E. Support default Dialog Font
// F. Inclusion of SS_OWNERDRAW via control creation and subclassing
// G. Modification to Text aligmnent code
// H. New background gradient fill function
//
// Thanks to:
// Steve Kowald - Using null handles
// Alan Chan - Supporting International Windows
// Dieter Fauth - Request for default Dialog font
// Herb Illfelder - Text Alignment code
//
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.6
// Jeroen Roosendaal - SetFont suggestion
// Laurent - Spotting SelectObject bugs
// Bernie - Fix PreCreateWindow bug
// Jignesh I. Patel - Added expanded tabs feature
// Jim Farmelant - Fix SetText crash
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::CLabel
//
// Description: Default contructor
//
// INPUTS:
//
// RETURNS:
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel::CLabel()
{
m_crText = GetSysColor(COLOR_WINDOWTEXT);
// 1.1
m_hBackBrush = NULL;
m_crHiColor = 0;
m_crLoColor = 0;
m_bTimer = FALSE;
m_bState = FALSE;
m_bTransparent = FALSE;
m_Link = LinkNone;
m_hCursor = NULL;
m_Type = None;
m_bFont3d = FALSE;
m_bNotifyParent = FALSE;
m_bToolTips = FALSE;
m_bRotation = FALSE;
m_fillmode = Normal;
m_cr3DHiliteColor = RGB(255,255,255);
m_hwndBrush = ::CreateSolidBrush(GetSysColor(COLOR_3DFACE));
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::~CLabel
//
// Description:
//
// INPUTS:
//
// RETURNS:
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
// NT ALMOND 15092000 1.5 Handle Check
//////////////////////////////////////////////////////////////////////////
CLabel::~CLabel()
{
// Clean up
m_font.DeleteObject();
::DeleteObject(m_hwndBrush);
// Stop Checking complaining
if (m_hBackBrush)
::DeleteObject(m_hBackBrush);
}
void CLabel::UpdateSurface()
{
CRect (rc);
GetWindowRect(rc);
RedrawWindow();
GetParent()->ScreenToClient(rc);
GetParent()->InvalidateRect(rc,TRUE);
GetParent()->UpdateWindow();
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::ReconstructFont
//
// Description: Helper function to build font after it was changed
//
// INPUTS:
//
// RETURNS:
//
// NOTES: PROTECTED
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
void CLabel::ReconstructFont()
{
m_font.DeleteObject();
BOOL bCreated = m_font.CreateFontIndirect(&m_lf);
ASSERT(bCreated);
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::OnPaint
//
// Description: Handles all the drawing code for the label
//
// INPUTS:
//
// RETURNS:
//
// NOTES: Called by Windows... not by USER
// Probably needs tiding up a some point.
// Different states will require this code to be reworked.
//
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 22/10/98 1.0 Origin
// NT ALMOND 15092000 1.5 Handle Check
// NT ALMOND 15092000 1.5 Alignment mods
// NT ALMOND 15092000 1.5 Gradient Fill Mode
// NT ALMOND 02072002 1.6 Fill SelectObject bugs
// NT ALMOND 02072002 1.6 Added to expand tabs
//////////////////////////////////////////////////////////////////////////
void CLabel::OnPaint()
{
CPaintDC dc(this); // device context for painting
DWORD dwFlags = 0;
CRect rc;
GetClientRect(rc);
CString strText;
GetWindowText(strText);
CBitmap bmp;
///////////////////////////////////////////////////////
//
// Set up for double buffering...
//
CDC* pDCMem;
CBitmap* pOldBitmap = NULL;
if (!m_bTransparent)
{
pDCMem = new CDC;
pDCMem->CreateCompatibleDC(&dc);
bmp.CreateCompatibleBitmap(&dc,rc.Width(),rc.Height());
pOldBitmap = pDCMem->SelectObject(&bmp);
}
else
{
pDCMem = &dc;
}
UINT nMode = pDCMem->SetBkMode(TRANSPARENT);
COLORREF crText = pDCMem->SetTextColor(m_crText);
CFont *pOldFont = pDCMem->SelectObject(&m_font);
// Fill in backgound if not transparent
if (!m_bTransparent)
{
if (m_fillmode == Normal)
{
CBrush br;
if (m_hBackBrush != NULL)
br.Attach(m_hBackBrush);
else
br.Attach(m_hwndBrush);
pDCMem->FillRect(rc,&br);
br.Detach();
}
else // Gradient Fill
{
DrawGradientFill(pDCMem, &rc, m_crLoColor, m_crHiColor, 100);
}
}
// If the text is flashing turn the text color on
// then to the color of the window background.
LOGBRUSH lb;
ZeroMemory(&lb,sizeof(lb));
// Stop Checking complaining
if (m_hBackBrush)
::GetObject(m_hBackBrush,sizeof(lb),&lb);
// Something to do with flashing
if (!m_bState && m_Type == Text)
pDCMem->SetTextColor(lb.lbColor);
DWORD style = GetStyle();
switch (style & SS_TYPEMASK)
{
case SS_RIGHT:
dwFlags = DT_RIGHT | DT_WORDBREAK;
break;
case SS_CENTER:
dwFlags = SS_CENTER | DT_WORDBREAK;
break;
case SS_LEFTNOWORDWRAP:
dwFlags = DT_LEFT;
break;
default: // treat other types as left
case SS_LEFT:
dwFlags = DT_LEFT | DT_WORDBREAK;
break;
}
// Added to expand tabs...
if(strText.Find(_T('\t')) != -1)
dwFlags |= DT_EXPANDTABS;
// If the text centered make an assumtion that
// the will want to center verticly as well
if (style & SS_CENTERIMAGE)
{
dwFlags = DT_CENTER;
// Apply
if (strText.Find(_T("\r\n")) == -1)
{
dwFlags |= DT_VCENTER;
// And because DT_VCENTER only works with single lines
dwFlags |= DT_SINGLELINE;
}
}
//
// 3333 DDDDD
// 3 D D
// 33 D D E F X
// 3 D D
// 3333 DDDDD
//
//
if (m_bRotation)
{
int nAlign = pDCMem->SetTextAlign (TA_BASELINE);
CPoint pt;
GetViewportOrgEx (pDCMem->m_hDC,&pt) ;
SetViewportOrgEx (pDCMem->m_hDC,rc.Width() / 2, rc.Height() / 2, NULL) ;
pDCMem->TextOut (0, 0, strText) ;
SetViewportOrgEx (pDCMem->m_hDC,pt.x / 2, pt.y / 2, NULL) ;
pDCMem->SetTextAlign (nAlign);
}
else
{
pDCMem->DrawText(strText,rc,dwFlags);
if (m_bFont3d)
{
pDCMem->SetTextColor(m_cr3DHiliteColor);
if (m_3dType == Raised)
rc.OffsetRect(-1,-1);
else
rc.OffsetRect(1,1);
pDCMem->DrawText(strText,rc,dwFlags);
m_3dType;
}
}
// Restore DC's State
pDCMem->SetBkMode(nMode);
pDCMem->SelectObject(pOldFont);
pDCMem->SetTextColor(crText);
if (!m_bTransparent)
{
dc.BitBlt(0,0,rc.Width(),rc.Height(),pDCMem,0,0,SRCCOPY);
// continue DC restore
pDCMem->SelectObject ( pOldBitmap ) ;
delete pDCMem;
}
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::OnTimer
//
// Description: Used in conjunction with 'FLASH' functions
//
// INPUTS: Windows API
//
// RETURNS: Windows API
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
void CLabel::OnTimer(UINT nIDEvent)
{
m_bState = !m_bState;
UpdateSurface();
CStatic::OnTimer(nIDEvent);
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::OnSetCursor
//
// Description: Used in conjunction with 'LINK' function
//
// INPUTS: Windows API
//
// RETURNS: Windows API
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
BOOL CLabel::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
if (m_hCursor)
{
::SetCursor(m_hCursor);
return TRUE;
}
return CStatic::OnSetCursor(pWnd, nHitTest, message);
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::OnLButtonDown
//
// Description: Called when a link is click on
//
// INPUTS: Windows API
//
// RETURNS: Windows API
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
// NT ALMOND 02072002 1.6 Added Mail support
//////////////////////////////////////////////////////////////////////////
void CLabel::OnLButtonDown(UINT nFlags, CPoint point)
{
if (!m_bNotifyParent) // Fix
{
CString strLink;
GetWindowText(strLink);
if (m_Link == HyperLink)
{
ShellExecute(NULL,_T("open"),m_sLink.IsEmpty() ? strLink : m_sLink,NULL,NULL,SW_SHOWNORMAL);
}
if (m_Link == MailLink)
{
strLink = _T("mailto:") + strLink;
ShellExecute( NULL, NULL, strLink, NULL, NULL, SW_SHOWNORMAL );
}
}
else
{
// To use notification in parent window
// Respond to a OnNotify in parent and disassemble the message
//
NMHDR nm;
nm.hwndFrom = GetSafeHwnd();
nm.idFrom = GetDlgCtrlID();
nm.code = NM_LINKCLICK;
GetParent()->SendMessage(WM_NOTIFY,nm.idFrom,(LPARAM) &nm);
}
CStatic::OnLButtonDown(nFlags, point);
}
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
// THE FUNCTIONS START HERE :----
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetText
//
// Description: Short cut to set window text - caption - label
//
// INPUTS: Text to use
//
// RETURNS: Reference to this
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26081998 1.0 Origin
// NT ALMOND 02072002 1.6 Crash Fix
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetText(const CString& strText)
{
if(IsWindow(this->GetSafeHwnd()))
{
SetWindowText(strText);
UpdateSurface();
}
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetTextColor
//
// Description: Sets the text color
//
// INPUTS: True or false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 22/10/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetTextColor(COLORREF crText)
{
m_crText = crText;
UpdateSurface();
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetFontBold
//
// Description: Sets the font ot bold
//
// INPUTS: True or false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 22/10/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetFontBold(BOOL bBold)
{
m_lf.lfWeight = bBold ? FW_BOLD : FW_NORMAL;
ReconstructFont();
UpdateSurface();
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetFontUnderline
//
// Description: Sets font underline attribue
//
// INPUTS: True of false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetFontUnderline(BOOL bSet)
{
m_lf.lfUnderline = bSet;
ReconstructFont();
UpdateSurface();
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetFontItalic
//
// Description: Sets font italic attribute
//
// INPUTS: True of false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetFontItalic(BOOL bSet)
{
m_lf.lfItalic = bSet;
ReconstructFont();
UpdateSurface();
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetSunken
//
// Description: Sets sunken effect on border
//
// INPUTS: True of false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetSunken(BOOL bSet)
{
if (!bSet)
ModifyStyleEx(WS_EX_STATICEDGE,0,SWP_DRAWFRAME);
else
ModifyStyleEx(0,WS_EX_STATICEDGE,SWP_DRAWFRAME);
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetBorder
//
// Description: Toggles the border on/off
//
// INPUTS: True of false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetBorder(BOOL bSet)
{
if (!bSet)
ModifyStyle(WS_BORDER,0,SWP_DRAWFRAME);
else
ModifyStyle(0,WS_BORDER,SWP_DRAWFRAME);
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetFontSize
//
// Description: Sets the font size
//
// INPUTS: True of false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetFontSize(int nSize)
{
CFont cf;
LOGFONT lf;
cf.CreatePointFont(nSize * 10, m_lf.lfFaceName);
cf.GetLogFont(&lf);
m_lf.lfHeight = lf.lfHeight;
m_lf.lfWidth = lf.lfWidth;
// nSize*=-1;
// m_lf.lfHeight = nSize;
ReconstructFont();
UpdateSurface();
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetBkColor
//
// Description: Sets background color
//
// INPUTS: Colorref of background color
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetBkColor(COLORREF crBkgnd, COLORREF crBkgndHigh , BackFillMode mode)
{
m_crLoColor = crBkgnd;
m_crHiColor = crBkgndHigh;
m_fillmode = mode;
if (m_hBackBrush)
::DeleteObject(m_hBackBrush);
if (m_fillmode == Normal)
m_hBackBrush = ::CreateSolidBrush(crBkgnd);
UpdateSurface();
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetFontName
//
// Description: Sets the fonts face name
//
// INPUTS: String containing font name
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
// NT ALMOND 15092000 1.5 Support internation windows
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetFontName(const CString& strFont, BYTE byCharSet /* Default = ANSI_CHARSET */)
{
m_lf.lfCharSet = byCharSet;
_tcscpy(m_lf.lfFaceName,strFont);
ReconstructFont();
UpdateSurface();
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::FlashText
//
// Description: As the function states
//
// INPUTS: True or false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::FlashText(BOOL bActivate)
{
if (m_bTimer)
KillTimer(1);
if (bActivate)
{
m_bState = FALSE;
m_bTimer = TRUE;
SetTimer(1,500,NULL);
m_Type = Text;
}
else
m_Type = None; // Fix
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::FlashBackground
//
// Description: As the function states
//
// INPUTS: True or false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::FlashBackground(BOOL bActivate)
{
if (m_bTimer)
KillTimer(1);
if (bActivate)
{
m_bState = FALSE;
m_bTimer = TRUE;
SetTimer(1,500,NULL);
m_Type = Background;
}
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetLink
//
// Description: Indicates the string is a link
//
// INPUTS: True or false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
// NT ALMOND 26/08/99 1.2 Added flexbility of
// Sending Click meessage to parent
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetLink(BOOL bLink,BOOL bNotifyParent)
{
if (bLink)
m_Link = HyperLink;
else
m_Link = LinkNone;
m_bNotifyParent = bNotifyParent;
if (m_Link != LinkNone)
ModifyStyle(0,SS_NOTIFY);
else
ModifyStyle(SS_NOTIFY,0);
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetLinkCursor
//
// Description: Sets the internet browers link
//
// INPUTS: Handle of cursor
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 26/08/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetLinkCursor(HCURSOR hCursor)
{
m_hCursor = hCursor;
return *this;
}
//////////////////////////////////////////////////////////////////////////
//
// Function: CLabel::SetTransparent
//
// Description: Sets the Label window to be transpaent
//
// INPUTS: True or false
//
// RETURNS: Reference to 'this' object
//
// NOTES:
//
// MODIFICATIONS:
//
// Name Date Version Comments
// NT ALMOND 22/10/98 1.0 Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel& CLabel::SetTransparent(BOOL bSet)
{
m_bTransparent = bSet;
ModifyStyleEx(0,WS_EX_TRANSPARENT); // Fix for transparency
UpdateSurface();