GWT openlayers，DrawFeature線條樣式

Question

我使用gwt openlayers在地圖上繪製一些線條。我想改變繪製特徵線的外觀。我注意到PathHandler類有setStyle方法，但使用此方法設置樣式不會改變線條外觀。

private DrawFeature createDrawFeature() { 
    DrawFeatureOptions options = new DrawFeatureOptions(); 
    options.onFeatureAdded(getStyle()); 
    PathHandler handler = new PathHandler(); 
    handler.setStyle(style); 
    return new DrawFeature(layer, handler, options); 
} 
private Style getStyle() { 
    Style style = new Style(); 
    style.setStrokeColor("#ffffff"); 
    style.setStrokeWidth(2.0); 
    return style; 
} 

我試圖設置不同的風格選項，但沒有效果。 有誰知道如何改變DrawFeature線的外觀？

Answer 1

如果草圖的風格（特徵在完成之前）執行繪圖（點，路徑或多邊形）的處理程序負責。

所以樣式你做的草圖：

//Create a style. We want a blue dashed line. 
    final Style drawStyle = new Style(); //create a Style to use 
    drawStyle.setFillColor("white"); 
    drawStyle.setGraphicName("x"); 
    drawStyle.setPointRadius(4); 
    drawStyle.setStrokeWidth(3); 
    drawStyle.setStrokeColor("#66FFFF"); 
    drawStyle.setStrokeDashstyle("dash"); 

    //create a StyleMap using the Style 
    StyleMap drawStyleMap = new StyleMap(drawStyle); 

    //Create PathHanlderOptions using this StyleMap 
    PathHandlerOptions phOpt = new PathHandlerOptions(); 
    phOpt.setStyleMap(drawStyleMap); 

    //Create DrawFeatureOptions and set the PathHandlerOptions (that have the StyleMap, that have the Style we wish) 
    DrawFeatureOptions drawFeatureOptions = new DrawFeatureOptions(); 
    drawFeatureOptions.setHandlerOptions(phOpt); 

    PathHandler pathHanlder = new PathHandler(); 

    // Create the DrawFeature control to draw on the map, and pass the DrawFeatureOptions to control the style of the sketch 
    final DrawFeature drawLine = new DrawFeature(vectorLayer, pathHanlder, drawFeatureOptions); 
    map.addControl(drawLine); 
    drawLine.activate(); 

我還添加了一個例子，她展示：http://demo.gwt-openlayers.org/gwt_ol_showcase/GwtOpenLayersShowcase.html?example=DrawFeature%20style%20example