Bug report (test case included): IE 11, 4.0p: Emptying FormItem not seen as a change

Hi,

this is now the bug report that prevents us from going back to 4.1p (see my other post from today http://forums.smartclient.com/showthread.php?t=32065).

Affected environment
* 4.1p latest nightlies (2015-01-10)
* IE 11.0.9600.17501

The bug disappears when using on of these browsers
* Firefox 34 on Windows
* Chromium on Ubuntu
* IE 8 emulated mode from IE 11.0.9600.17501

The bug is also not reproducable
* SmartGwt 5.0p latest nightly (2015-0-10) EDIT: I just noticed an internal bug report ticket where one of our testers has seen this in 5.0p and IE11, too. But I cannot reproduce it. When you find the reason for this bug and fix it in 4.1p you should have a look at 5.0p, too.

The core problem is that a TextItem (and maybe other FormItems) are reporting themselves as unchanged when the formitem is emptied.

The attached test case shows this.

Steps to reproduce:
* DataSourceA as a source for the DynamicForm with
- DataSourceTextField for TextItem-FormItem
* DynamicForm with
- Attached to DataSourceA
- TextItem attached to DataSourceTextField
- Attached to ValuesManager
* ValuesManager attached to DataSourceA and DynamicForm
* Button
- valuesManager.validate()
- GWT.log(valuesManager.getChangedValues().toString());
- valuesManager.saveData();
* Start app
* Enter a single character in the text field
* Hit Save Button
- Note that getChangedValues logs that both attributes got changed
* Empty the TextItem (by selecting the text and hitting backspace, or any other way)
* Hit Save Button
- valuesManager.getChangedValues().size() is 0!!!!

Additionally info: An ItemChangedHandler will also not fire when the formItem is emptied.

Regards,
Andre

Attached Files

	SmartGwtBugReport.java (1.4 KB)
	Demo.java (74 Bytes)
	DemoTicket1449.java (4.1 KB)
	BugReportDataSource.java (2.7 KB)
	GwtRpcDataSource.java (6.7 KB)