Hi,
hopefully you can help me getting some inheritance done with Ui-Binder.
My goal is to create a basic EditPanel. I want to define all styles, some
fixed text, and some buttons there.
It should also have an area do display some errors. And also a placeholder
where I could later place a FlowPanel with TextBoxes.
I then want to reuse this BaseEditPanel and want to supply it the FlowPanel
with
TextBoxes.
Also some logic should be written inside the extended Panel to validate the
TextBoxes.
To get an idea of what I'm trying to do, I created the following example:
BaseEditPanel.ui.xml
<g:FlowPanel>
<some kind of placeholder ui:field="placeholder" />
<g:Button text="save" ui:field="save" />
<g:Label ui:field="error" />
</g:FlowPanel>
class BaseEditPanel extends Composite {
@UiField Button save;
@UiLabel Label error;
@UiHandler("save")
void onSave() {
boolean isValid = validate();
if (!isValid) {
error.setText("there were some errors");
}
}
public abstract validate();
}
CustomEditPanel.ui.xml
<g:FlowPanel>
<g:Label text="name" />
<g:TextBox ui:field="name" />
</g:FlowPanel>
class CustomEditPanel {
@UiField TextBox name;
@Override
boolean validate() {
return name.getText().isEmpty() ? false : true;
}
}
Questions:
1) What could I use for a placeholder in BaseEditPanel?
2) How could I get the CustomEditPanel to be placed into the BaseEditPanel at
the position of the placeholder?
3) I know I cannot have a normal BaseEditPanel class with an abstract method.
What can I change? Make the BaseEditPanel also abstract, as it anyway
should only be displayed when a Widget for the placeholder is provided?
Hope you could help
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