Hi,
I have an error message when I trying to use ZoomIn/ZoomOut tools after
removing all layers from mapPane. I understand that it makes no sense, but
it possible situation.
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.geotools.swing.JMapPane.equalsFullExtent(JMapPane.java:606)
at org.geotools.swing.JMapPane.doSetDisplayArea(JMapPane.java:564)
at org.geotools.swing.JMapPane.setDisplayArea(JMapPane.java:544)
at
org.geotools.swing.tool.ZoomInTool.onMouseClicked(ZoomInTool.java:101)
at
org.geotools.swing.tool.MapToolManager.mouseClicked(MapToolManager.java:130)
at
java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)
...etc...
Reason - "fullExtent" is null during the call "JMapPane.equalsFullExtent()"
I added the following code into ZoomInTool#onMouseClicked:
if( getMapPane().getMapContext().getLayerCount() == 0 ) return;
It's working,
but I want to ask - what is the right way to delete layer? Maybe I do
something wrong or miss something?
Here is my code:
//adding a layer:
...
MapLayer layer = new DefaultMapLayer( featureSource, style);
getMapContext().addLayer(layer);
...
//and deleting a layer:
getMapContext().removeLayer(layer);
Thank you,
Michael
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