添加图层后，要用鼠标放大好多次才能完全显示添加图层后的地图，这个应该怎么解决了？

LayerSettingVector setting = new LayerSettingVector();
                        GeoStyle geoStyle_R = setting.getStyle();

                        geoStyle_R.setFillBackOpaque(true); //是否透明
                        geoStyle_R.setFillOpaqueRate(50); //透明多少
                        geoStyle_R.setFillGradientMode(FillGradientMode.NONE);
                        GeoRegion geoRegion = new GeoRegion();
                        Point2Ds point2Ds_R = new Point2Ds();
                        point2Ds_R.addRange(point2DArray_R);
                        geoRegion.addPart(point2Ds_R);
                        geoRegion.setStyle(geoStyle_R);

                        m_mapControl.setWaitCursorEnabled(false);
                        m_mapControl.getMap().viewEntire();
                        TrackingLayer layer = m_mapControl.getMap().getTrackingLayer();
                        layer.add(geoRegion, "Region");
                        m_mapControl.getMap().setAntialias(true);
                        m_mapControl.getMap().setViewBounds(new Rectangle2D(0, 0, 250, 250));
                        m_mapControl.getMap().refresh();

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