[FNR] Chart: Bind empty store giving a nullpointer exception

[OBELIX]

Hi,

Could you explain again (with an example) how to add my DataProvider class ?

I don't undertand !

Thanks,

JB

[HerrB]

Sure, assuming you are using Eclipse.

- Create a new package in your project named "com.extjs.gxt.charts.client.model"
- Copy the file DataProvider.java from gxt-xy\src\com\extjs\gxt\charts\client\model into the new package
- Change the methods getMaxYValue and getMinYValue as described above or use this:

protected double getMaxYValue() {
    if (maxYValue == null) {
        return 0d;
    } else {
        return maxYValue;
    }
  }

  protected double getMinYValue() {
    if (minYValue == null) {
        return 0d;
    } else {
        return minYValue;
    }
  }

As the package is equally named, your code wins. But remember: This file/package has to be removed or updated on new GXT versions...

Regards,

HerrB

[OBELIX]

Hi,

Thanks, I did it .
But I always have the same error when I put this line in my code:

model.setScaleProvider(ScaleProvider.ROUNDED_NEAREST_SCALE_PROVIDER);

An idea ?

Thkx,

JB

This is the error :

[ERROR] Unable to load module entry point class com.jblabs.mycharts.client.ChartsLabs (see associated exception for details)
java.lang.NullPointerException: null
at com.extjs.gxt.charts.client.model.ChartModel.updateYScale(ChartModel.java:471)
at com.extjs.gxt.charts.client.Chart.processModel(Chart.java:245)
at com.extjs.gxt.charts.client.Chart.setChartModel(Chart.java:168)
at com.jblabs.mycharts.client.ChartNContainer.showChart(ChartNContainer.java:64)
at com.jblabs.mycharts.client.ChartNContainer.onRender(ChartNContainer.java:51)
at com.extjs.gxt.ui.client.widget.Component.render(Component.java:1019)
at com.extjs.gxt.ui.client.widget.Component.onAttach(Component.java:1634)
at com.extjs.gxt.ui.client.widget.Container.onAttach(Container.java:471)
at com.google.gwt.user.client.ui.Widget.setParent(Widget.java:393)
at com.google.gwt.user.client.ui.Panel.adopt(Panel.java:119)
at com.google.gwt.user.client.ui.ComplexPanel.add(ComplexPanel.java:86)
at com.google.gwt.user.client.ui.AbsolutePanel.add(AbsolutePanel.java:80)
at com.jblabs.mycharts.client.ChartsLabs.onModuleLoad(ChartsLabs.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:326)
at com.google.gwt.dev.shell.BrowserWidget.attachModuleSpace(BrowserWidget.java:343)
at com.google.gwt.dev.shell.ie.BrowserWidgetIE6.access$300(BrowserWidgetIE6.java:37)
at com.google.gwt.dev.shell.ie.BrowserWidgetIE6$External.gwtOnLoad(BrowserWidgetIE6.java:77)
at com.google.gwt.dev.shell.ie.BrowserWidgetIE6$External.invoke(BrowserWidgetIE6.java:161)
at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke(IDispatchImpl.java:294)
at com.google.gwt.dev.shell.ie.IDispatchImpl.method6(IDispatchImpl.java:194)
at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java:117)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
at com.google.gwt.dev.SwtHostedModeBase.processEvents(SwtHostedModeBase.java:264)
at com.google.gwt.dev.HostedModeBase.pumpEventLoop(HostedModeBase.java:557)
at com.google.gwt.dev.HostedModeBase.run(HostedModeBase.java:405)
at com.google.gwt.dev.HostedMode.main(HostedMode.java:232)

[jburnhams]

I've just came across this bug, so it doesn't seem to be fixed in 2.1.1?

[MartinElkjaer]

No....

GXT-team: Is there a reason for not fixing this one ??

-Martin

[sven]

It will be fixed with the next release. No need to bump it over and over again. Its quite minor.

[Jamie Avins]

This issue is now assigned in our tracking software and will be resolved shortly.

[jburnhams]

This doesn't seem to have been fixed in 2.1.3?

[sven]

No it was not.

[jburnhams]

Is there a reason why not? My understanding was the patch builds included all the latest available bug fixes?