Zoom in a circle

Question

While Zoom in a circle ,its position is changing slightly,For lines and points there is no problem .How to solve this problem?
Edited by: engineer_work8 on Feb 14, 2010 11:47 PM

Answer 1

This is the code i m using to zoom in,this method is called from a MousewheelHandler class.I am zooming a circle upto 0.001 scale ,the original position of the circle get changed but after some actions it comes to it original position .How to place the circle at correct position while zooming...
public boolean zoomIn(double centerX, double centerY)
if ( ((getMainPanel().getEditModel().getScalingFactor() * .5) <= 0.0009))
          || getMainPanel().getEditModel().getScalingFactor() * (1 / 1.5) < 0.0009)
          return false;
setCursorWait();
          getMainPanel().setMessage("");
          getMainPanel().getEditModel().setScale((1 / 1.5));
          getMainPanel().getEditModel().setScalingFactor(getMainPanel().getEditModel().getScalingFactor()getMainPanel().getEditModel().getScale());
          getMainPanel().setInitialZoomFactor();
          gotShape.setViewX(zoomInOutX(gotShape.getViewX(), centerX));
gotShape.setViewY(zoomInOutY(gotShape.getViewY(), centerY));
     gotShape.setOriginX(zoomInOutX(gotShape.getOriginX(), centerX));
     gotShape.setOriginY(zoomInOutY(gotShape.getOriginY(), centerY));
          //Recalculate the ViewOriginX and the ViewOriginY
          getMainPanel().getEditModel().setViewOriginX(getMainPanel().zoomInOutX(getMainPanel().getEditModel().getViewOriginX(), centerX));
          getMainPanel().getEditModel().setViewOriginY(getMainPanel().zoomInOutY(getMainPanel().getEditModel().getViewOriginY(), centerY));
          gotShape.setViewX(getXWRTOrigin(gotShape.getX()));
          gotShape.setViewY(getYWRTOrigin(gotShape.getY()));
          getMainPanel().getDrawingArea().repaint();
          setCursorDefault();
return true;
public double zoomInOutX(double x, double zoomPointX)
     return zoomPointX - ((zoomPointX - x) / getEditModel().getScale());
public double zoomInOutY(double y, double zoomPointY)
     return zoomPointY - ((zoomPointY - y) / getEditModel().getScale());
}