How to Bind a Model to a SWT Text but showing only one field in the text

Question

I have a Remote File Model which has fields as file name, file path, and connection IP,connection port etc for the remote directory.I want to show only the file path in a Text. I am using JFace Data binding for binding the model to SWT Text but I am able to bind only 1 field to it. Please help me to bind the Complete model to the Text and showing only one field. Also tell me if it is possible or not or there is some other way.

Answer 1

If I understand you correctly you want to show multiple model fields in one SWT Text widget? You can do it in the following way:

class FileModel {

    private String name;
    private String filePath;
    private String ip;
    // other fields, getters and setters

    public String getFileSummary() {
        return name + " : " + filePath + " : " + ip;
    }

    public void setFileSummary(String summary) {
        // ignore
    }

}

Then you can bind it like this:

FileModel model;
new DataBindingContext().bindValue(SWTObservables.observeText(text, SWT.Modify),
            BeansObservables.observeValue(model, "fileSummary"), new UpdateValueStrategy(), new UpdateValueStrategy());

The idea is that while specifying "fileSummary" field name to bind in your model, JFace will look for getter and setter for that field, so you don't actually need a field itself.

In getter you can provided required info and you could even parse some special format in setter and assign those to related fields, something like this:

public void setFileSummary(String summary) {
    // todo: implement in a smart way;)
    String[] parts = summary.split(" : ");
    name = parts[0];
    filePath = parts[1];
    ip = parts[2];
}