Android Open Source - RadaeePDF-B4A Ink

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Back to project page RadaeePDF-B4A.
License

The source code is released under:
Apache License
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Java Source Code

package com.radaee.pdf;
/*from   w w w.j  av a 2  s. c om*/
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.graphics.Paint.Cap;
import android.graphics.Paint.Join;

/**
 * class for ink.
 * @author radaee
 *
 */
public class Ink 
{
  protected int hand = 0;
  protected int color = 0;
  protected float width = 0;
  private static native int create( float line_w, int color, int style );
  private static native void onDown( int hand, float x, float y );
  private static native void onMove( int hand, float x, float y );
  private static native void onUp( int hand, float x, float y );
  private static native int getNodeCount( int hand );
  private static native int getNode( int hand, int index, float[] pt );
  private static native void destroy( int hand );
  /**
   * constructor for ink.
   * @param line_w width of line.
   */
  public Ink( float line_w )
  {
    width = line_w;
    color = Global.inkColor;
    hand = create( line_w, color, 1 );
  }
  /**
   * destroy and free memory.
   */
  public void Destroy()
  {
    destroy( hand );
    hand = 0;
  }
  /**
   * call when click down
   * @param x x value of point in this object.
   * @param y y value of point in this object.
   */
  public void OnDown( float x, float y )
  {
    onDown( hand, x, y );
  }
  /**
   * call when moving
   * @param x x value of point in this object.
   * @param y y value of point in this object.
   */
  public void OnMove( float x, float y )
  {
    onMove( hand, x, y );
  }
  /**
   * call when click up
   * @param x x value of point in this object.
   * @param y y value of point in this object.
   */
  public void OnUp( float x, float y )
  {
    onUp( hand, x, y );
  }
  /**
   * draw to canvas
   * @param canvas Canvas to draw
   */
  public void OnDraw(Canvas canvas)
  {
    int index = 0;
    int cnt = getNodeCount(hand);
    float pt1[] = new float[2];
    float pt2[] = new float[2];
    Paint paint = new Paint();
    Path path = new Path();
    paint.setStrokeCap(Cap.ROUND);
    paint.setStrokeJoin(Join.ROUND);
    paint.setStrokeWidth(width);
    paint.setColor(color);
    paint.setStyle(Style.STROKE);
    paint.setAntiAlias(true);
    path.reset();
    while( index < cnt )
    {
      int op = getNode( hand, index, pt1 );
      switch( op )
      {
      case 1:
        path.lineTo(pt1[0], pt1[1]);
        index++;
        break;
      case 2:
        getNode( hand, index + 1, pt2 );
        path.quadTo(pt1[0], pt1[1], pt2[0], pt2[1]);
        index += 2;
        break;
      default:
        path.moveTo(pt1[0], pt1[1]);
        index++;
        break;
      }
    }
    canvas.drawPath(path, paint);
  }
  public void OnDraw(Canvas canvas, float scrollx, float scrolly)
  {
    int index = 0;
    int cnt = getNodeCount(hand);
    float pt1[] = new float[2];
    float pt2[] = new float[2];
    Paint paint = new Paint();
    Path path = new Path();
    paint.setStrokeCap(Cap.ROUND);
    paint.setStrokeJoin(Join.ROUND);
    paint.setStrokeWidth(width);
    paint.setColor(color);
    paint.setStyle(Style.STROKE);
    paint.setAntiAlias(true);
    path.reset();
    while( index < cnt )
    {
      int op = getNode( hand, index, pt1 );
      switch( op )
      {
      case 1:
        path.lineTo(pt1[0] + scrollx, pt1[1] + scrolly);
        index++;
        break;
      case 2:
        getNode( hand, index + 1, pt2 );
        path.quadTo(pt1[0] + scrollx, pt1[1] + scrolly, pt2[0] + scrollx, pt2[1] + scrolly);
        index += 2;
        break;
      default:
        path.moveTo(pt1[0] + scrollx, pt1[1] + scrolly);
        index++;
        break;
      }
    }
    canvas.drawPath(path, paint);
  }
}
Java Source Code List
