title: how to change the placement of legend widget in androidplot
body: <p>I am struggling to move legend widget in androidplot to the place where I want. </p>
  
  <p>I am trying to use androidplot to render a set of data. I followed the way of placing legend widget to a point by calling position() method used in DemoApp. But I never succeeded. I was blocked by this for almost 1 week. Can someone help me check whether i made some mistakes in my code. I did not find any documentation about how to use this lib except the sample code. </p>
  
  <p>My layout xml:</p>
  
  <pre><code>&lt;com.androidplot.xy.XYPlot
      android:id="@+id/mySimpleXYPlot"
      android:layout_width="fill_parent"
      android:layout_height="200dp"
      android:layout_below="@+id/seperator1"
      androidPlot.domainLabelWidget.labelPaint.textSize="@dimen/domain_label_font_size"
    androidPlot.graphWidget.domainLabelPaint.textSize="@dimen/domain_tick_label_font_size"
          androidPlot.graphWidget.domainOriginLabelPaint.textSize="@dimen/domain_tick_label_font_size"
          androidPlot.graphWidget.rangeLabelPaint.textSize="@dimen/range_tick_label_font_size"
          androidPlot.graphWidget.rangeOriginLabelPaint.textSize="@dimen/range_tick_label_font_size"
          androidPlot.legendWidget.heightMetric.value="25dp"
          androidPlot.graphWidget.marginBottom="25dp"
          androidPlot.graphWidget.marginLeft="15dp"
          androidPlot.graphWidget.marginRight="10dp"
          androidPlot.graphWidget.marginTop="20dp"
          androidPlot.legendWidget.iconSizeMetrics.heightMetric.value="15dp"
          androidPlot.legendWidget.iconSizeMetrics.widthMetric.value="15dp"
          androidPlot.legendWidget.positionMetrics.anchor="left_top"
          androidPlot.legendWidget.positionMetrics.xPositionMetric.value="0"
          androidPlot.legendWidget.textPaint.textSize="@dimen/legend_text_font_size"
          androidPlot.legendWidget.widthMetric.value="100dp"
          androidPlot.rangeLabelWidget.labelPaint.textSize="@dimen/range_label_font_size"
          androidPlot.titleWidget.labelPaint.textSize="@dimen/title_font_size" /&gt;
      &lt;!-- androidPlot.graphWidget.gridLinePaint.color="#000000"/&gt; --&gt;
  </code></pre>
  
  <p>My source code:</p>
  
  <pre><code> private void makePlotPretty() {
              // use a 2x2 grid with room for 4 items:
              plot.getLegendWidget().setTableModel(new DynamicTableModel(2, 2));
  
              // add a semi-transparent black background to the legend
              // so it's easier to see overlaid on top of our plot:
              Paint bgPaint = new Paint();
              bgPaint.setColor(Color.BLACK);
              bgPaint.setStyle(Paint.Style.FILL);
              bgPaint.setAlpha(255);
  
              plot.getLegendWidget().setBackgroundPaint(bgPaint);
  
  /*          plot.getLegendWidget().setPositionMetrics(null);
  */
  
              plot.getLegendWidget().setWidth(PixelUtils.dpToPix(40), SizeLayoutType.FILL);
  
              plot.getGraphWidget().setRangeLabelHorizontalOffset(-1);
  
              plot.getLegendWidget().position(125, XLayoutStyle.ABSOLUTE_FROM_LEFT, 100, YLayoutStyle.ABSOLUTE_FROM_TOP, AnchorPosition.LEFT_TOP);
  
          }
  </code></pre>