B4J Question Google Maps fitBounds

[Firpas]

Hi to everyone

I'm trying to apply the method fitBounds with the GoogleMaps library, but an error while trying to initialize the object LatLongBounds procuce.
This is my code

Dim MapBounds As JavaObject
MapBounds.InitializeArray("com.lynden.gmapsfx.javascript.object.LatLongBounds", Null)
   
    For i=0 To MapMarkers.Size-1
        Dim MapMarker As MapMarker = MapMarkers.GetValueAt(i)
        Dim Point As LatLng = Marker.Position
        MapBounds.RunMethod("extend", Array(Point))
    Next
    Dim jMap As JavaObject = gmap
    jMap = jMap.GetField("map")
    jMap.RunMethod("fitBounds", Array(MapBounds))

Any ideas?
Thanks in advance

 

[Erel]

Can you post the error message?

 

[Firpas]

Here is the error:

Error occurred on line: 388 (Princip)
java.lang.NullPointerException
at anywheresoftware.b4j.object.JavaObject.InitializeArray(JavaObject.java:106)
at andestaspc.firpas.com.princip._mapcenter(princip.java:567)
at andestaspc.firpas.com.princip._btnmapzoomplus_mousepressed(princip.java:545)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:612)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:226)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:159)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:90)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:84)
at anywheresoftware.b4j.objects.NodeWrapper$2.handle(NodeWrapper.java:100)
at anywheresoftware.b4j.objects.NodeWrapper$2.handle(NodeWrapper.java:1)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:352)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:388)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:387)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)

 

[Firpas]

Thanks for your replay.

I've been watching documentation of "com.lynden.gmapsfx" in "http://rterp.github.io/GMapsFX/apidocs/com/lynden/gmapsfx/javascript/object/package-frame.html" and seen that "extend" method does not exist in the LatLongBounds object, so I made some changes to my code:

Dim nLat, sLat, wLng, eLng As Double
For i=0 To MapMarkers.Size-1
      Dim MapMarker As Marker = MapMarkers.GetValueAt(i)
      Dim Point As LatLng = MapMarker.Position

      If i=0 Then
            nLat = Point.Latitude
            sLat = Point.Latitude
            wLng = Point.Longitude
            eLng = Point.Longitude
      Else
            nLat = Max(nLat, Point.Latitude)
            sLat = Min(sLat, Point.Latitude)
            eLng = Min(eLng, Point.Longitude)
            wLng = Max(wLng, Point.Longitude)
      End If
Next
Dim NorthEast As LatLng
NorthEast.Initialize(nLat, eLng)
Dim SouthWest As LatLng
SouthWest.Initialize(sLat, wLng)
Dim MapBounds As JavaObject
MapBounds.InitializeArray("com.lynden.gmapsfx.javascript.object.LatLongBounds", Array(SouthWest, NorthEast))
Dim jMap As JavaObject = gmap
jMap = jMap.GetField("map")
jMap.RunMethod("fitBounds", Array(MapBounds))

And now it is the error:

Waiting for debugger to connect...
Program started.
Error occurred on line: 412 (Princip)
java.lang.IllegalArgumentException: array element type mismatch
at java.lang.reflect.Array.set(Native Method)
at anywheresoftware.b4j.object.JavaObject.InitializeArray(JavaObject.java:108)
at andestaspc.firpas.com.princip._mapcenter(princip.java:637)
at andestaspc.firpas.com.princip._btnmapzoomplus_mousepressed(princip.java:545)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:612)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:226)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:159)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:90)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:84)
at anywheresoftware.b4j.objects.NodeWrapper$2.handle(NodeWrapper.java:100)
at anywheresoftware.b4j.objects.NodeWrapper$2.handle(NodeWrapper.java:1)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:352)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:388)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:387)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)

 

[Erel]

Why do you use InitializeArray? This should only be used if you want to create an array of items.

You should use InitializeNewInstance.

 

[Firpas]

Ok Erel, now run well.
Sorry my mistake.
Thank you

 

[Firpas]

Hi Erel, only one think more

Is possible add events (mousedown, mousemove, mouseup, ...) to map?

I think its is posible with
addUIEventHandler(UIEventType type, UIEventHandler h)
Adds a handler for a mouse type event on the map
in http://rterp.github.io/GMapsFX/apidocs/com/lynden/gmapsfx/javascript/object/GoogleMap.html

its an importan feature for many question:
Zom Window, fitBounds, ...


But how to recibe this events in b4j??

Thanks in advanze

 

[Erel]

You can handle the Click event. It is possible to add other events with JavaObject with CreateEvent. However it is more complicated.