问题
I am working on GWT/GXT
I trying to create radar Chart Here is the Code
public class Test implements EntryPoint {
public static boolean isExplorer() {
String test = Window.Location.getPath();
if (test.indexOf("pages") != -1) {
return false;
}
return true;
}
@Override
public void onModuleLoad() {
RootPanel.get().add(new ChartExmaple());
}
}
public class ChartExmaple extends LayoutContainer {
private ChartModelExample example = new RadarChart();
private Command updateCmd;
@Override
protected void onRender(Element parent, int index) {
super.onRender(parent, index);
ContentPanel cp = new ContentPanel();
cp.setHeading("Charts Gallery");
cp.setFrame(true);
cp.setSize(700, 350);
cp.setLayout(new BorderLayout());
BorderLayoutData centerData = new BorderLayoutData(LayoutRegion.CENTER);
centerData.setMargins(new Margins(0, 5, 0, 0));
cp.add(getChart(), centerData);
add(cp, new MarginData(20));
}
private LayoutContainer getChart() {
FieldSet fs = new FieldSet();
fs.setHeading("Opera Star");
fs.setLayout(new FitLayout());
String url = !Test.isExplorer() ? "../../" : "";
url += "gxt/chart/open-flash-chart.swf";
final Chart chart = new Chart(url);
chart.setBorders(true);
fs.add(chart, new FitData(0, 0, 20, 0));
updateCmd = new Command() {
public void execute() {
chart.setChartModel(example.getChartModel(5));
}
};
return fs;
}
}
RadarChart.Java
public class RadarChart implements ChartModelExample {
@Override
public ChartModel getChartModel(int segments) {
ChartModel cm = new ChartModel("Popularity",
"font-size: 12px; text-align: left;");
cm.setBackgroundColour("#f0f0f0");
RadarAxis ra = new RadarAxis();
ra.setMax(segments + 1);
ra.setStroke(2);
ra.setColour("#A1D4B5");
ra.setGridColour("#C0DEBF");
ra.setSpokeLabels("Ext", "Web", "Java", "AJAX", "PHP");
cm.setRadarAxis(ra);
AreaChart area = new AreaChart();
area.setFillAlpha(0.3f);
area.setColour("#ff9900");
area.setFillColour("#ff6600");
area.setLoop(true);
area.addValues(segments);
area.addValues(Random.nextInt(segments + 1));
area.addValues(Random.nextInt(segments + 1));
area.addValues(Random.nextInt(segments + 1));
area.addValues(Random.nextInt(segments + 1));
cm.addChartConfig(area);
return cm;
}
}
Error
[ERROR] [test] - Unable to load module entry point class test.client.Test (see associated exception for details)
[ERROR] [test] - Failed to load module 'test' from user agent 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.116 Safari/537.36' at 127.0.0.1:58087
19:10:32.887 [ERROR] [test] Unable to load module entry point class test.client.Test (see associated exception for details)
com.google.gwt.core.client.JavaScriptException: (TypeError) @com.extjs.gxt.ui.client.widget.ComponentHelper::doAttachNative(Lcom/google/gwt/user/client/ui/Widget;)([Java object: com.extjs.gxt.ui.client.widget.ContentPanel@676012820]): Cannot read property 'embedSWF' of undefined
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:249)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:299)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
at com.extjs.gxt.ui.client.widget.ComponentHelper.doAttachNative(ComponentHelper.java)
at com.extjs.gxt.ui.client.widget.ComponentHelper.doAttach(ComponentHelper.java:21)
at com.extjs.gxt.ui.client.widget.Container.attachChildren(Container.java:635)
at com.extjs.gxt.ui.client.widget.Container.onLayoutExcecuted(Container.java:497)
at com.extjs.gxt.ui.client.widget.Container$1.handleEvent(Container.java:586)
at com.extjs.gxt.ui.client.widget.Container$1.handleEvent(Container.java:1)
at com.extjs.gxt.ui.client.event.BaseObservable.callListener(BaseObservable.java:178)
at com.extjs.gxt.ui.client.event.BaseObservable.fireEvent(BaseObservable.java:86)
at com.extjs.gxt.ui.client.widget.Layout.layout(Layout.java:116)
at com.extjs.gxt.ui.client.widget.Container.doLayout(Container.java:351)
at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:443)
at com.extjs.gxt.ui.client.widget.LayoutContainer.layout(LayoutContainer.java:246)
at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:426)
at com.extjs.gxt.ui.client.widget.LayoutContainer.layout(LayoutContainer.java:241)
at com.extjs.gxt.ui.client.widget.Container.onAttach(Container.java:479)
at com.google.gwt.user.client.ui.Widget.setParent(Widget.java:475)
at com.google.gwt.user.client.ui.Panel.adopt(Panel.java:127)
at com.google.gwt.user.client.ui.ComplexPanel.add(ComplexPanel.java:97)
at com.google.gwt.user.client.ui.AbsolutePanel.add(AbsolutePanel.java:97)
at test.client.Test.onModuleLoad(Test.java:24)
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:406)
at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:526)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Unknown Source)
Edited
public interface ChartModelExample {
public ChartModel getChartModel(int segments);
}
回答1:
I have included swfobject.js in my HTML page and the error is gone.
I have downloaded it from gxt/samples/public/flash/swfobject.js
Make sure you have included the swfobject.js and the location of open-flash-chart.swf is correct.
For more info follow this link till the last section.
来源：https://stackoverflow.com/questions/23326527/unable-to-load-module-entry-point-in-gwt-gxt-project