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applications:custom_errorhandling [2019/08/06 13:04] admin |
applications:custom_errorhandling [2019/08/06 22:40] admin |
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| </file> | </file> | ||
| - | So, it's very easy to change the default error handling which shows a popup dialog with the error message and some details (stack trace). | + | So, it's very easy to change the default error handling which shows a popup dialog: |
| + | {{:applications:error_dialog.png?nolink|}} | ||
| + | |||
| + | with the error message and some details (stack trace). \\ | ||
| + | \\ | ||
| As an example of a custom error handling, we'll show the exceptions directly in the work-screens. So, every work-screen should be able to show error messages. To make this possible, we introduce the following interface: | As an example of a custom error handling, we'll show the exceptions directly in the work-screens. So, every work-screen should be able to show error messages. To make this possible, we introduce the following interface: | ||
| Line 41: | Line 45: | ||
| { | { | ||
| labelMain.setText("ErrorArea"); | labelMain.setText("ErrorArea"); | ||
| + | labelMain.setForeground(UIColor.red); | ||
| ... | ... | ||
| Line 91: | Line 96: | ||
| public void showErrorMessage() | public void showErrorMessage() | ||
| { | { | ||
| - | String message = liErrors.get(0).getMessage(); | + | String message = ExceptionUtil.getRootCause(liErrors.get(0)).getMessage(); |
| | | ||
| for (IWorkScreen screen : getWorkScreens()) | for (IWorkScreen screen : getWorkScreens()) | ||
| Line 107: | Line 112: | ||
| We collect all occurred Exceptions in a list - **liErrors** - and show one message at the end, see **showErrorMessages**. \\ | We collect all occurred Exceptions in a list - **liErrors** - and show one message at the end, see **showErrorMessages**. \\ | ||
| \\ | \\ | ||
| - | In showErrorMessages, we iterate through all opened work-screens and check if the interface is implemented. In our example, every work-screen has to implement the interface IErrorHandler. A better solution would be a custom work-screen base class, e.g. | + | In **showErrorMessages**, we iterate through all opened work-screens and check if our interface is implemented. In our example, every work-screen has to implement the interface **IErrorHandler**. A better solution would be a custom work-screen base class, e.g. |
| <file java> | <file java> | ||
| Line 118: | Line 123: | ||
| public class FirstWorkScreen extends MyCustomWorkScreen | public class FirstWorkScreen extends MyCustomWorkScreen | ||
| </file> | </file> | ||
| + | |||
| + | And the result will look like following: | ||
| + | |||
| + | {{:applications:error_screen.jpg?nolink|}} | ||