Re: MVP pattern and dynamic widgets

Recently we are learning the MVP pattern.

We think that the presenter don't need to know how the implementation of the view, but the data which the view is need.

So, put the following code into the view will be better,

// Build the UI in the fly
tagsContainer.clear();
for (Tag tag : currentUser.getTags()) {
 tagsContainer.add(new CheckBox(tag.getTagName()));
}

// Find the one which are checked
int i=0;
for(Tag tag: currentUser.getTags()) {
 boolean checked = getView().getCheckBox(i).getValue();
 i++;
}

then provide two interfaces: initTagsContainer(Tag tag) and getSelectedTag().

How about this approach?

My english is poor, and wish you can understand what i mean.

2010/9/20 Sydney <sydney.henrard@gmail.com>

My question is related to the MVP pattern. I have a VerticalPanel in
which I add several CheckBox. The UI is build on the fly since it
depends on the user settings. The user clicks some of the checkboxes
and in my presenter I would like to know which one are selected. What
should I put in my view interface of the presenter. My current
approach is the following:

The presenter:

public interface MyView {
 HasWidgets getTagsContainer();
 void showTagsContainer(); // Do a setVisible in the view
 HasValue<Boolean> getCheckBox(int i); // Return the ith checkbox
}

// Build the UI in the fly
HasWidgets tagsContainer = getView().getTagsContainer();
tagsContainer.clear();
for (Tag tag : currentUser.getTags()) {
 tagsContainer.add(new CheckBox(tag.getTagName()));
}
getView().showTagsContainer();

The user clicks on some of the checkboxes

// Find the one which are checked
int i=0;
for(Tag tag: currentUser.getTags()) {
 boolean checked = getView().getCheckBox(i).getValue();
 i++;
}

What do you think of my approach? Is there a better way to achieve it?
I am learning the MVP pattern, so I try to get the best practices.

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.

--
每天做好一件事

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.