don't crash in UnselectAll() if the tree has no root

[wxWidgets.git] / src / mac / carbon / stattext.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        stattext.cpp
// Purpose:     wxStaticText
// Author:      AUTHOR
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) AUTHOR
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "stattext.h"
#endif

#include "wx/app.h"
#include "wx/stattext.h"
#include "wx/notebook.h"
#include "wx/tabctrl.h"
#include "wx/dc.h"
#include "wx/dcclient.h"
#include "wx/utils.h"
#include "wx/settings.h"

#include <stdio.h>

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxStaticText, wxControl)
#endif

#include "wx/mac/uma.h"

BEGIN_EVENT_TABLE(wxStaticText, wxStaticTextBase)
    EVT_PAINT(wxStaticText::OnPaint)
END_EVENT_TABLE()

bool wxStaticText::Create(wxWindow *parent, wxWindowID id,
           const wxString& label,
           const wxPoint& pos,
           const wxSize& size,
           long style,
           const wxString& name)
{
    SetName(name);
    m_backgroundColour = parent->GetBackgroundColour() ;
    m_foregroundColour = parent->GetForegroundColour() ;

    if ( id == -1 )
        m_windowId = (int)NewControlId();
    else
        m_windowId = id;

    m_windowStyle = style;
    m_label = label ;

    bool ret = wxControl::Create( parent, id, pos, size, style , wxDefaultValidator , name );
    SetBestSize( size ) ;
    
    return ret;
}

const wxString punct = " ,.-;:!?";

void wxStaticText::DrawParagraph(wxDC &dc, wxString paragraph)
{
  int x = 0 ;
  int y = 0 ;
  int i = 0 ;
  long width, height ;
  bool linedrawn = true;
  while( paragraph.Length() > 0 )
  {
        dc.GetTextExtent( paragraph , &width , &height ) ;
                    
        if ( width > m_width )
        {
            for ( int p = paragraph.Length() -1 ; p > 0 ; --p )
            {                     
              if ((punct.Find(paragraph[p]) != wxNOT_FOUND) || !linedrawn)
                {
                  int blank = (paragraph[p] == ' ') ? 0 : 1;
                  
                    dc.GetTextExtent( paragraph.Left(p + blank) , &width , &height ) ;
                    
                    if ( width <= m_width )
                    {   
                        int pos = x ;
                        if ( HasFlag( wxALIGN_CENTER ) )
                        {
                            pos += ( m_width - width ) / 2 ;
                      }
                        else if ( HasFlag( wxALIGN_RIGHT ) )
                        {
                            pos += ( m_width - width ) ;
                      }
                            
                    dc.DrawText( paragraph.Left(p + blank), pos , y) ;
                    y += height ;
                        paragraph = paragraph.Mid(p+1) ;
                        linedrawn = true;
                        break ;
                    }
                }
            }
            
            linedrawn = false;
        }
        else
        {
            int pos = x ;
            if ( HasFlag( wxALIGN_CENTER ) )
            {
                pos += ( m_width - width ) / 2 ;
          }
            else if ( HasFlag( wxALIGN_RIGHT ) )
            {
                pos += ( m_width - width ) ;
          }
                
        dc.DrawText( paragraph, pos , y) ;
        paragraph="";
        y += height ;
        }
    }
}

void wxStaticText::OnDraw( wxDC &dc )
{
    if (m_width <= 0 || m_height <= 0)
        return;

  if ( !IsWindowHilited( MacGetRootWindow() ) && 
    ( GetBackgroundColour() == wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE ) 
      || GetBackgroundColour() == wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE) ) )
  {
    dc.SetTextForeground( wxColour( 0x80 , 0x80 , 0x80 ) ) ;
  }
  else
  {
    dc.SetTextForeground( GetForegroundColour() ) ;
  }
  
  wxString paragraph;
  int i = 0 ;
  wxString text = m_label;
	while (i < text.Length())
	{
	  paragraph += text[i];
	  
  	if (text[i] == 13 || text[i] == 10)
	    DrawParagraph(dc, paragraph);
	    
    ++i;
  }
  if (paragraph.Length() > 0)
	  DrawParagraph(dc, paragraph);
}

void wxStaticText::OnPaint( wxPaintEvent &event ) 
{
    wxPaintDC dc(this);
    OnDraw( dc ) ;
}

wxSize wxStaticText::DoGetBestSize() const
{
    int x,y ;
    int widthTextMax = 0, widthLine,
        heightTextTotal = 0, heightLineDefault = 0, heightLine = 0;
        
    wxString curLine;
    for ( const wxChar *pc = m_label; ; pc++ )
    {
        if ( *pc == wxT('\n') || *pc == wxT('\0') )
        {
            if ( !curLine )
            {
                // we can't use GetTextExtent - it will return 0 for both width
                // and height and an empty line should count in height
                // calculation
                if ( !heightLineDefault )
                    heightLineDefault = heightLine;
                if ( !heightLineDefault )
                    GetTextExtent(_T("W"), NULL, &heightLineDefault);

                heightTextTotal += heightLineDefault;
                
                heightTextTotal++;  // FIXME: why is this necessary?
            }
            else
            {
                GetTextExtent(curLine, &widthLine, &heightLine);
                if ( widthLine > widthTextMax )
                    widthTextMax = widthLine;
                heightTextTotal += heightLine;
                
                heightTextTotal++;  // FIXME: why is this necessary?
            }

            if ( *pc == wxT('\n') ) {
               curLine.Empty();
            }
            else {
               // the end of string
               break;
            }
        }
        else {
            curLine += *pc;
        }
    }

    return wxSize(widthTextMax, heightTextTotal);
}

void wxStaticText::SetLabel(const wxString& st )
{
	SetTitle( st ) ;
	m_label = st ;
	if ( !(GetWindowStyle() & wxST_NO_AUTORESIZE) )
		SetSize( GetBestSize() ) ;

	Refresh() ;	
	Update() ;
}