Widget - Set Scale

float x=preview.getScaleX(), y=preview.getScaleY(),yenix=x-1,yeniy=y-1; preview.setScaleX(yenix);preview.setScaleY(yeniy);

float x=preview.getScaleX(), y=preview.getScaleY(),yenix=x+1,yeniy=y+1; preview.setScaleX(yenix);preview.setScaleY(yeniy);