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HintWindow.java

/* {{{ License.
 * 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 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */ //}}}

// :indentSize=4:lineSeparator=\n:noTabs=false:tabSize=4:folding=explicit:collapseFolds=0:

package org.mathpiper.ui.gui.worksheets;


public class HintWindow
{
      public  String[] iText = new String[64];
      public  String[] iDescription = new String[64];

      public  boolean iAllowSelection = true;
      public  int iNrDescriptions;
      public  int iMaxWidth;
      public  int iTextSize;
      public  int iCurrentPos;
      public  int iNrLines;

      public  HintWindow(int aTextSize)
      {
            iNrLines = 0;
            iNrDescriptions = 0;
            iMaxWidth = 0;
            iTextSize = aTextSize;
            iCurrentPos = 0;
      }
      public  void addLine(String aText)
      {
            if (iNrLines >= 20) return;
            iText[iNrLines] = aText;
            iNrLines++;
            iMaxWidth = 0;
      }
      public  void addDescription(String aText)
      {
            if (iNrDescriptions >= 20) return;
            iDescription[iNrDescriptions] = aText;
            iNrDescriptions++;
            iMaxWidth = 0;
      }
      public  void draw(int x, int y, MathPiperGraphicsContext  aGraphicsContext)
      {
            aGraphicsContext.setFontSize(0,iTextSize);
            if (iMaxWidth == 0)
            {
                  int i;
                  for (i=0;i<iNrLines;i++)
                  {
                        int width = aGraphicsContext.textWidthInPixels(iText[i]);
                        if (width>iMaxWidth)
                              iMaxWidth = width;
                  }
                  for (i=0;i<iNrDescriptions;i++)
                  {
                        int width = aGraphicsContext.textWidthInPixels(iDescription[i]);
                        if (width>iMaxWidth)
                              iMaxWidth = width;
                  }
                  iMaxWidth = iMaxWidth + 8;
            }

            //System.out.println("iNrLines = "+iNrLines);
            //System.out.println("iMaxWidth = "+iMaxWidth);

            int ix = x;
            int iy = y;
            int w = 5+iMaxWidth;
            int h = height(aGraphicsContext);
            iy -= (h+4);

            if (!iAllowSelection)
                  aGraphicsContext.setColor(221,221,238);
            else
                  aGraphicsContext.setColor(221,221,238);
            aGraphicsContext.fillRect(ix,iy,w,h);
            aGraphicsContext.setColor(0,0,0);
            aGraphicsContext.drawRect(ix,iy,w,h);

            int i;

            //System.out.println("iTextSize = "+iTextSize);
            //System.out.println("aGraphicsContext.FontHeight() = "+aGraphicsContext.FontHeight());

            for (i=0;i<iNrLines;i++)
            {
                  if (!iAllowSelection)
                  {
                        aGraphicsContext.setColor(0,0,0);
                  }
                  else
                  {
                        if (i == iCurrentPos)
                        {
                              aGraphicsContext.setColor(190,190,200);
                              aGraphicsContext.fillRect(1+ix,1+iy+(i)*aGraphicsContext.fontHeight(),w-2,aGraphicsContext.fontHeight()-2);
                              aGraphicsContext.setColor(0,0,0);
                        }
                        else
                        {
                              aGraphicsContext.setColor(0,0,0);
                        }
                  }
                  aGraphicsContext.drawText(ix+2,iy+(i+1)*aGraphicsContext.fontHeight()-aGraphicsContext.fontDescent(),iText[i]);
            }

            if (iNrDescriptions>0)
            {
                  int offset = (iNrLines+1)*aGraphicsContext.fontHeight()+7;

                  aGraphicsContext.drawLine(ix+6,iy+offset-4-aGraphicsContext.fontHeight(),ix+w-6,iy+offset-4-aGraphicsContext.fontHeight());

                  aGraphicsContext.setFontSize(1,iTextSize);
                  for (i=0;i<iNrDescriptions;i++)
                  {
                        aGraphicsContext.drawText(ix+2,iy+offset+(i)*aGraphicsContext.fontHeight()-aGraphicsContext.fontDescent(),iDescription[i]);
                  }
            }
      }



      public  int height(MathPiperGraphicsContext  aGraphicsContext)
      {
            int h;
            aGraphicsContext.setFontSize(0,iTextSize);
            h = iNrLines*aGraphicsContext.fontHeight()+2;

            if (iNrDescriptions>0)
            {
                  aGraphicsContext.setFontSize(1,iTextSize);
                  h += iNrDescriptions*aGraphicsContext.fontHeight()+2;
                  // space for line
                  h+=7;
            }
            return h;
      }

}




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