Hello Support,

Custom mouse listener added to a chart in JForex Platform works correctly however adding a listener a chart in SDK causes exceptions on every mouse action over the chart.

Issue can by reproduced by starting attached code. The code comes from JForex Wiki, the only changes are added usr/pwd and mouse listener in line 188.

Exception:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
   at com.dukascopy.charts.wrapper.StrategyThreadDelegatableMouseListener.mouseEntered(StrategyThreadDelegatableMouseListener.java:69)
   at com.dukascopy.charts.view.swing.AbstractChartPanelView$1.mouseEntered(AbstractChartPanelView.java:91)
   at java.awt.AWTEventMulticaster.mouseEntered(AWTEventMulticaster.java:283)
   at java.awt.Component.processMouseEvent(Component.java:6306)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3275)
   at java.awt.Component.processEvent(Component.java:6062)
   at java.awt.Container.processEvent(Container.java:2039)
   at java.awt.Component.dispatchEventImpl(Component.java:4660)
   at java.awt.Container.dispatchEventImpl(Container.java:2097)
   at java.awt.Component.dispatchEvent(Component.java:4488)
   at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
   at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:4364)
   at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4218)
   at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
   at java.awt.Container.dispatchEventImpl(Container.java:2083)
   at java.awt.Window.dispatchEventImpl(Window.java:2489)
   at java.awt.Component.dispatchEvent(Component.java:4488)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:668)
   at java.awt.EventQueue.access$400(EventQueue.java:81)
   at java.awt.EventQueue$2.run(EventQueue.java:627)
   at java.awt.EventQueue$2.run(EventQueue.java:625)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
   at java.awt.EventQueue$3.run(EventQueue.java:641)
   at java.awt.EventQueue$3.run(EventQueue.java:639)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:638)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

Best regards,
Kurak

You are electing the listener to work synchronously with the strategy thread, while adding the listener from outside the strategy - a strategy which does not exist at the moment of the method call. Hence, in such case you should use asynchronous=true.
See the description of the asynchronous parameter:
https://www.dukascopy.com/client/javadoc/com/dukascopy/api/IChartPanel.html#addMouseListener(boolean,%20com.dukascopy.api.chart.mouse.IChartPanelMouseListener)