ExampleDrawTextWx.cpp

Example for drawing Text using wxWidgets

Author

MIP

/* This file is part of the BIAS library (Basic ImageAlgorithmS).

   Copyright (C) 2003-2009    (see file CONTACT for details)
   Vision N GmbH
   Schauenburgerstr. 116
   24118 Kiel
   
   BIAS is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.
   
   BIAS 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 Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public License
   along with BIAS; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/


/**
   @example ExampleDrawTextWx.cpp
   @relates DrawTextWx
   @brief Example for drawing Text using wxWidgets
   @ingroup g_examples
   @author MIP
*/
#include <Gui/DrawTextWx.hh>
#include <wx/wx.h>

#include <Base/Image/Image.hh>
#include <Base/Image/ImageIO.hh>



using namespace BIAS;
using namespace std;

/** \cond HIDDEN_SYMBOLS*/
class MyApp : public wxApp
{
  virtual bool OnInit()
  {
    wxInitAllImageHandlers();

    unsigned width = 640, height = 480;
    Image<unsigned char> img(width, height, 3);
    img.SetColorModel(ImageBase::CM_RGB);
    img.FillImageWithXValue();
    if (ImageIO::Save("source.mip", img)!=0){
      cerr << "Error saving source image\n";
      return false;
    }
    string text = "foobar 42";
    unsigned pos_x = 10, pos_y = 10;
    unsigned bb_text_width, bb_text_height;
    if (DrawTextWx<unsigned char>::GetTextExtend(text, bb_text_width, 
                                                 bb_text_height)!=DTWX_OK){
      cerr << "Error getting text extend\n";
      return false;
    }
    cout << "extend of text is "<<bb_text_width<<", "<<bb_text_height<<endl;

    if (DrawTextWx<unsigned char>::Text(img, text, pos_x, pos_y)!=DTWX_OK){
      cerr << "Error drawing text\n";
      return false;
    }

    text += "(centered)";
    pos_x = width/2;
    pos_y = height/2;
    ColourRGB<unsigned char> red(255, 0, 0);
    ColourRGB<unsigned char> green(0, 255, 0);
    enum DrawTextWx<unsigned char>::EVerticalAlign valign = 
      DrawTextWx<unsigned char>::V_ALIGN_CENTER;
    enum DrawTextWx<unsigned char>::EHorizontalAlign halign = 
      DrawTextWx<unsigned char>::H_ALIGN_CENTER;
    unsigned point_size = 12;
    if (DrawTextWx<unsigned char>::Text(img, text, pos_x, pos_y, red, green,
                                        point_size, valign, halign)!=DTWX_OK){
      cerr << "Error drawing text\n";
      return false;
    }

    if (ImageIO::Save("text.mip", img)!=0){
      cerr << "Error saving destination image\n";
      return false;
    }

    return false;
  }
};
/** \endcond */
IMPLEMENT_APP(MyApp)