GXT 2.2.5 future support and GWT 2.5.x compatibility

[tamsler]

What is Sencha's plan for supporting GXT 2.2.5+ in the future?

Does GXT 2.2.5 work with GWT 2.5.x (RC)?

Best,
-- Thomas
UC Davis

[dronvano]

Hello, anyone can provide information about compatibility with GWT 2.5?

[Colin Alworth]

Both GXT 2 and 3 seem to be working correctly with GWT 2.5.0, with one small exception. There was a regression created in GWT 2.5 where a class is missing from the gwt-servlet.jar file, so that any library (including both GXT 2 and 3) that wants to use the class GWT (such as for GWT.isClient()) on the server, and be compatible with both 2.4.0 and 2.5.0 will have problems.

The bug, reported in the GWT issue tracker:
http://code.google.com/p/google-web-...detail?id=7527

This can most easily be fixed by also including the requestfactory-server.jar in your server's WEB-INF/lib/ directory. As an alternative, you could copy the com.google.gwt.core.client.GWTBridge class and put it on your own classpath, in the package where it belongs. Both of these fixes are documented in the linked issue, and have been demonstrated to work.

As is indicated in the linked issue, the bug has been fixed, and will be released in a future GWT version, but in the meantime, these workarounds will get you past this issue.

One more issue to those upgrading from much older versions of GWT: Make sure you use the right gxt.jar file. There are three such jars included in the GXT download, depending on which version of GWT you are using. Make sure to use the one labeled gxt-2.x.x-gwt22.jar, the jar compatible with all versions of GWT newer than 2.2.

[kjordan]

Has anyone used the LiveGridView under GWT 2.5? I seem to be getting an infinite update loop:

com.google.gwt.core.client.JavaScriptException: (RangeError) : Maximum call stack size exceeded
    at Unknown.$collect(JsArrayString.java:42)
    at Unknown.fillInStackTrace_1(StackTraceCreator.java:174)
    at Unknown.fillInStackTrace(StackTraceCreator.java:501)
    at Unknown.$fillInStackTrace(Throwable.java:72)
    at Unknown.$$init_936(Throwable.java:46)
    at Unknown.Throwable_0(Throwable.java:49)
    at Unknown.Exception_0(Exception.java:25)
    at Unknown.RuntimeException_0(RuntimeException.java:25)
    at Unknown.JavaScriptException_1(JavaScriptException.java:115)
    at Unknown.JavaScriptException_0(JavaScriptException.java:107)
    at Unknown.caught_0(Exceptions.java:29)
    at Unknown.initDim(Array.java:138)
    at Unknown.$$init_1295(ArrayList.java:64)
    at Unknown.ArrayList_2(ArrayList.java:81)
    at Unknown.$checkHyphenCache(ComputedStyleImpl.java:52)
    at Unknown.getStyleAttribute_0(ComputedStyleImpl.java:30)
    at Unknown.$getStyleAttribute_0(El.java:1391)
    at Unknown.$getFrameWidth(El.java:1115)
    at Unknown.$setWidth_1(El.java:2895)
    at Unknown.setWidth(El.java:2893)
    at Unknown.$updateWidth(ColumnHeader.java:295)
    at Unknown.$updateColumnWidth_1(ColumnHeader.java:890)
    at Unknown.$updateAllColumnWidths(GridView.java:1971)
    at Unknown.updateAllColumnWidths_0(LiveGridView.java:437)
    at Unknown.fitColumns(GridView.java:1045)
    at Unknown.$layout_6(GridView.java:1409)
    at Unknown.layout_5(GridView.java:1389)
    at Unknown.$layout_5(GridView.java:533)
    at Unknown.calculateVBar_0(LiveGridView.java:213)
    at Unknown.$refresh_1(GridView.java:578)
    at Unknown.refresh_3(LiveGridView.java:134)
    at Unknown.$onClear_0(GridView.java:1516)
    at Unknown.storeClear_1(GridView.java:1318)
    at Unknown.$handleEvent_14(StoreListener.java:24)
    at Unknown.handleEvent_14(StoreListener.java:19)
    at Unknown.$callListener(BaseObservable.java:178)
    at Unknown.$fireEvent(BaseObservable.java:86)
.....lines repeat a couple hundred thousand times...
    at Unknown.removeAll_1(Store.java:472)
    at Unknown.$updateRows(LiveGridView.java:496)
    at Unknown.updateAllColumnWidths_0(LiveGridView.java:439)
    at Unknown.fitColumns(GridView.java:1045)
    at Unknown.$layout_6(GridView.java:1409)
    at Unknown.layout_5(GridView.java:1389)
    at Unknown.$layout_5(GridView.java:533)
    at Unknown.calculateVBar_0(LiveGridView.java:213)
    at Unknown.$refresh_1(GridView.java:578)
    at Unknown.refresh_3(LiveGridView.java:134)
    at Unknown.$onClear_0(GridView.java:1516)
    at Unknown.storeClear_1(GridView.java:1318)
    at Unknown.$handleEvent_14(StoreListener.java:24)
    at Unknown.handleEvent_14(StoreListener.java:19)
    at Unknown.$callListener(BaseObservable.java:178)
    at Unknown.$fireEvent(BaseObservable.java:86)
    at Unknown.removeAll_1(Store.java:472)
    at Unknown.$updateRows(LiveGridView.java:496)
    at Unknown.execute_23(LiveGridView.java:417)
    at Unknown.$doExecuteCommands(CommandExecutor.java:291)
    at Unknown.run_15(CommandExecutor.java:205)
    at Unknown.fire(Timer.java:149)
    at Unknown.anonymous(Timer.java:68)
    at Unknown.apply(Impl.java:189)
    at Unknown.entry0(Impl.java:242)
    at Unknown.anonymous(Impl.java:70)

[Colin Alworth]

kjordan, that looks like an issue that also is present with GWT 2.4, related to resizing the LiveGridView. I know this is fixed in GXT 3 (and works in either GWT 2.4 or 2.5), but I'm not sure if we have a fix in GXT 2.

Can you provide a working example where this can be reproduced with GWT 2.5 but not GWT 2.4? That seems that it would point to a bug in GWT itself, but without more details, I can't be certain.

[kjordan]

Looks like fixing the LiveGridView issue is as easy as extending it and putting a flag around the super.updateRows call:

@Override
	protected void updateRows(int newIndex,
							  boolean reload) {
		if (this.updateInProgress) {
			return;
		}
		this.updateInProgress = true;
		super.updateRows(newIndex,
						 reload);
		this.updateInProgress = false;
	}