MeteoInfo Java版二次开发教程五

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在LayerLegend中鼠标右击MapFrame名会出现一个Active菜单项，点击它可以用来设置ActiveMapFrame。此次教程用来实现使MapView随着切换ActiveMapFrame也随之切换，用一个SetMapView函数来完成。
首先在FrmMain构造函数中加入下列代码

1. //setMapView
   
2.         this.setMapView();        
   
3. 
   
4.         this.layersLegend1.addActiveMapFrameChangedListener(new IActiveMapFrameChangedListener(){
   
5.             @Override
   
6.             public void activeMapFrameChangedEvent(ActiveMapFrameChangedEvent event) {
   
7.             mapView1 = layersLegend1.getActiveMapFrame().getMapView();
   
8.             setMapView();
   
9.                 if (jTabbedPane1.getSelectedIndex() == 0) {
   
10.                 mapView1.paintLayers();
    
11.                 }
    
12.             }
    
13.         });
    

//setMapView<br />         this.setMapView();        <br /> <br />         this.layersLegend1.addActiveMapFrameChangedListener(new IActiveMapFrameChangedListener(){<br />             @Override<br />             public void activeMapFrameChangedEvent(ActiveMapFrameChangedEvent event) {<br />             mapView1 = layersLegend1.getActiveMapFrame().getMapView();<br />             setMapView();<br />                 if (jTabbedPane1.getSelectedIndex() == 0) {<br />                 mapView1.paintLayers();<br />                 }<br />             }<br />         });<br />

写一个SetMapView函数用来切换MapView，代码如下：

1. private void setMapView(){
   
2.         //Add map view
   
3.         this.mapView1.setLockViewUpdate(true);
   
4.         this.jPanel_Map.removeAll();
   
5.         javax.swing.GroupLayout jPanel_MapLayout=new javax.swing.GroupLayout(jPanel_Map);
   
6.         jPanel_Map.setLayout(jPanel_MapLayout);
   
7.         jPanel_MapLayout.setHorizontalGroup(
   
8.                 jPanel_MapLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(mapView1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));
   
9.         jPanel_MapLayout.setVerticalGroup(
   
10.                 jPanel_MapLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(mapView1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));
    
11.         this.mapView1.setLockViewUpdate(false);
    
12.         if (_currentTool != null) {
    
13.         _currentTool.doClick();
    
14.         }
    
15.         this.mapView1.setFocusable(true);
    
16.         this.mapView1.requestFocusInWindow();      
    
17. }
    

private void setMapView(){<br />         //Add map view<br />         this.mapView1.setLockViewUpdate(true);<br />         this.jPanel_Map.removeAll();<br />         javax.swing.GroupLayout jPanel_MapLayout=new javax.swing.GroupLayout(jPanel_Map);<br />         jPanel_Map.setLayout(jPanel_MapLayout);<br />         jPanel_MapLayout.setHorizontalGroup(<br />                 jPanel_MapLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(mapView1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));<br />         jPanel_MapLayout.setVerticalGroup(<br />                 jPanel_MapLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(mapView1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));<br />         this.mapView1.setLockViewUpdate(false);<br />         if (_currentTool != null) {<br />         _currentTool.doClick();<br />         }<br />         this.mapView1.setFocusable(true);<br />         this.mapView1.requestFocusInWindow();       <br /> }<br />

气象数据中有一个重要的类MeteoDataInfo，用它创建一个对象，用相应Open语句可以打开不同格式的气象数据，以GrADS格式的经典示例数据model.ctl和model.dat为例，用openGrADSData函数打开GrADS格式数据，然后获取格点或者站点数据，用GridData和StationData类来表示，然后创建并添加图层。添加一个MeteoInfo菜单，为该菜单添加一个GrADS Data子菜单，为该子菜单再添加一个Contour菜单，打开model.ctl文件并绘制等值线图层，代码如下：

1.     private void jMenuItem_ContourActionPerformed(java.awt.event.ActionEvent evt) {                                                  
   
2.         // TODO add your handling code here:
   
3.         //Create a MeteoDataInfo object
   
4.         MeteoDataInfo aDataInfo = new MeteoDataInfo();
   
5. 
   
6.         //Open GrADS data file
   
7.         String dataDir = "E:\\MeteoInfo\\sample\\GrADS\\";
   
8.         String fileName = dataDir + "model.ctl";
   
9.         aDataInfo.openGrADSData(fileName);
   
10. 
    
11.         //Get GridData
    
12.         GridData press = aDataInfo.getGridData("PS");
    
13. 
    
14.         //Create a legend scheme
    
15.         LegendScheme aLS = LegendManage.createLegendSchemeFromGridData(press,LegendType.UniqueValue, ShapeTypes.Polyline);
    
16. 
    
17.         //Create a contour layer
    
18.         VectorLayer aLayer = DrawMeteoData.createContourLayer(press, aLS, "Contour_PS", "PS", true);
    
19. 
    
20.         //Add layer
    
21.         layersLegend1.getActiveMapFrame().addLayer(aLayer);
    
22.         layersLegend1.getActiveMapFrame().moveLayer(aLayer.getHandle(), 2);
    
23.         layersLegend1.repaint();
    
24. 
    
25.         //Change title of the layout
    
26.         LayoutGraphic aTitle = mapLayout1.getTexts().get(0);
    
27.         aTitle.setLabelText("MeteoInfo Class Library Demo - Contour Layer");
    
28. 
    
29.         //Add a legend in layout
    
30.         LayoutLegend aLegend = mapLayout1.addLegend(650, 100);
    
31.         aLegend.setLegendStyle(LegendStyles.Normal);
    
32.         aLegend.setLegendLayer(aLayer);
    
33.         mapLayout1.paintGraphics();
    
34.     }
    

    private void jMenuItem_ContourActionPerformed(java.awt.event.ActionEvent evt) {                                                  <br />         // TODO add your handling code here:<br />         //Create a MeteoDataInfo object<br />         MeteoDataInfo aDataInfo = new MeteoDataInfo();<br /> <br />         //Open GrADS data file<br />         String dataDir = "E:\\MeteoInfo\\sample\\GrADS\\";<br />         String fileName = dataDir + "model.ctl";<br />         aDataInfo.openGrADSData(fileName);<br /> <br />         //Get GridData<br />         GridData press = aDataInfo.getGridData("PS");<br /> <br />         //Create a legend scheme<br />         LegendScheme aLS = LegendManage.createLegendSchemeFromGridData(press,LegendType.UniqueValue, ShapeTypes.Polyline);<br /> <br />         //Create a contour layer<br />         VectorLayer aLayer = DrawMeteoData.createContourLayer(press, aLS, "Contour_PS", "PS", true);<br /> <br />         //Add layer<br />         layersLegend1.getActiveMapFrame().addLayer(aLayer);<br />         layersLegend1.getActiveMapFrame().moveLayer(aLayer.getHandle(), 2);<br />         layersLegend1.repaint();<br /> <br />         //Change title of the layout<br />         LayoutGraphic aTitle = mapLayout1.getTexts().get(0);<br />         aTitle.setLabelText("MeteoInfo Class Library Demo - Contour Layer");<br /> <br />         //Add a legend in layout<br />         LayoutLegend aLegend = mapLayout1.addLegend(650, 100);<br />         aLegend.setLegendStyle(LegendStyles.Normal);<br />         aLegend.setLegendLayer(aLayer);<br />         mapLayout1.paintGraphics();<br />     } <br />

调试结果如下

kongfeng0824

不错不错        谢谢分享  

shan

很好，必须鼓励！

刘小宝

本科生学习中

wanghp

厉害

wanghp

厉害