我有两个自定义图像作为JMapViewer
上的标记。我希望地图设置适当的平移和缩放,使两个标记在地图显示可见。我有一个按钮。所以,现在的情况是地图在加载时并没有缩放到这些标记处;但当我点击按钮时,它会。有没有办法在加载时设置适当的平移和缩放?
public class PanelAcars extends javax.swing.JPanel implements JMapViewerEventListener
{
private final JMapViewerTree treeMap;
public PanelAcars()
{
super();
initComponents(); // GUI components
treeMap = new JMapViewerTree("Zones");
// Listen to the map viewer for user operations so components will
// receive events and update
map().addJMVListener(this);
setLayout(new BorderLayout());
pnlAcarsMapView = new JPanel(new BorderLayout());
JPanel panelTop = new JPanel();
JPanel panelBottom = new JPanel();
JPanel helpPanel = new JPanel();
add(pnlAcarsMapView, BorderLayout.NORTH);
add(helpPanel, BorderLayout.SOUTH);
pnlAcarsMapView.add(panelTop, BorderLayout.NORTH);
pnlAcarsMapView.add(panelBottom, BorderLayout.SOUTH);
/* THIS BUTTON WORKS!!! */
JButton button = new JButton("Zoom...");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
map().setDisplayToFitMapMarkers();
}
});
final JCheckBox showZoomControls = new JCheckBox("Show zoom controls");
showZoomControls.setSelected(map().getZoomControlsVisible());
showZoomControls.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
map().setZoomContolsVisible(showZoomControls.isSelected());
}
});
panelBottom.add(showZoomControls);
final JCheckBox scrollWrapEnabled = new JCheckBox("Scrollwrap enabled");
scrollWrapEnabled.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
map().setScrollWrapEnabled(scrollWrapEnabled.isSelected());
}
});
panelBottom.add(scrollWrapEnabled);
panelBottom.add(button);
add(treeMap, BorderLayout.CENTER);
/* Add Airports to the map */
LayerGroup mapGroupAirports = new LayerGroup("MapAirports");
Layer mapLayerDep = mapGroupAirports.addLayer("MapDep");
Layer mapLayerDest = mapGroupAirports.addLayer("MapDest");
Layer mapLayerAlt = mapGroupAirports.addLayer("MapAlt");
/* Add Plane to the map */
Layer mapLayerPlane = new Layer("MapPlane");
/* Set coordinates */
Coordinate coordinatesPlane = new Coordinate(49.814284999, 98.642065999);
Coordinate coordinatesDep = new Coordinate(23.814284999, 45.642065999);
JMapViewerMarkerCustomImage markerPlane;
JMapViewerMarkerCustomImage markerDep;
Image imageMarkerPlane;
Image imageMarkerDep;
try
{
imageMarkerPlane = ImageIO.read(this.getClass().getResource("/images/image1.png"));
markerPlane = new JMapViewerMarkerCustomImage(coordinatesPlane,imageMarkerPlane);
map().addMapMarker(markerPlane);
imageMarkerDep = ImageIO.read(this.getClass().getResource("/images/image2.png"));
markerDep = new JMapViewerMarkerCustomImage(coordinatesDep,imageMarkerDep);
map().addMapMarker(markerDep);
// AND THIS IS NOT WORKING AT LOADING!!!
map().setDisplayToFitMapElements(true, true, true);
} catch (IOException ex) {
ex.printStackTrace();
}
map().addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON1) {
map().getAttribution().handleAttribution(e.getPoint(), true);
}
}
});
map().addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseMoved(MouseEvent e) {
Point p = e.getPoint();
boolean cursorHand = map().getAttribution().handleAttributionCursor(p);
if (cursorHand) {
map().setCursor(new Cursor(Cursor.HAND_CURSOR));
} else {
map().setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
}
//if (showToolTip.isSelected()) map().setToolTipText(map().getPosition(p).toString());
}
});
}
非常感谢!
在地图的tileLoadingFinished()
实现中调用setDisplayToFitMapMarkers()
。使用boolean
变量loaded
(默认为false
),下面的实现在第一个tile加载后调用该方法;父实现将repaint()
任何后续的贴片。
private boolean loaded;
private class MyViewer extends JMapViewer {
@Override
public void tileLoadingFinished(Tile tile, boolean success) {
super.tileLoadingFinished(tile, success);
if (!loaded & success) {
loaded = true;
setDisplayToFitMapMarkers();
}
}
…
}
要使用JMapViewerTree
获得类似的结果,您需要更改在JMapViewerTree
构造函数中实例化的map
。以下更改适用于Demo.java
:
…
private boolean loaded;
…
public JMapViewerTree(String name, boolean treeVisible) {
…
map = new JMapViewer() {
@Override
public void tileLoadingFinished(Tile tile, boolean success) {
super.tileLoadingFinished(tile, success);
if (!loaded & success) {
loaded = true;
setDisplayToFitMapMarkers();
}
}
};
…
}
作为题外话,考虑扩展或替换DefaultMapController
,而不是MouseAdapter
,正如这里所建议的。