Now I found answer to my own question (in the Russian blog about Qooxdoo, here I will translate the answer).
So, there are separate classes in separate files for main application and the dialog.
In dialog, we are adding the qx.event.type.Data for result output through this event.
So, for example we are having the Qooxdoo application, that is named "custom", like in documentation.
In Application.js we are putting this code to work with class:
// Adding dialog window
this.__uiWindow = new custom.UserDialog();
this.__uiWindow.moveTo(320, 30);
this.__uiWindow.open();
// Adding the listener for pressing "Ok"
this.__uiWindow.addListener("changeUserData", function (e) {
this.debug(e.getData());
});
e.getData() is giving the resulting information.
Then we must create file named UserDialog.js for the class, containing event and form:
qx.Class.define("custom.UserDialog", {
extend: qx.ui.window.Window,
events: {
"changeUserData": "qx.event.type.Data"
},
construct: function () {
this.base(arguments, this.tr("User info"));
// Layout
var layout = new qx.ui.layout.Basic();
this.setLayout(layout);
this.setModal(true);
this.__form = new qx.ui.form.Form();
// User id field
var usrId = new qx.ui.form.TextField();
this.__form.add(usrId, this.tr("ID"), null, "Id");
// User password field
var usrPassword = new qx.ui.form.PasswordField();
usrPassword.setRequired(true);
this.__form.add(usrPassword, this.tr("Password"), null, "Password");
// Adding form controller and model
var controller = new qx.data.controller.Form(null, this.__form);
this.__model = controller.createModel();
// Save button
var okbutton = new qx.ui.form.Button(this.tr("Ok"));
this.__form.addButton(okbutton);
okbutton.addListener("execute", function () {
if (this.__form.validate()) {
var usrData = qx.util.Serializer.toJson(this.__model);
this.fireDataEvent("changeUserData", usrData);
this.close();
};
}, this);
// Cancel button
var cancelbutton = new qx.ui.form.Button(this.tr("Cancel"));
this.__form.addButton(cancelbutton);
cancelbutton.addListener("execute", function () {
this.close();
}, this);
var renderer = new qx.ui.form.renderer.Single(this.__form);
this.add(renderer);
}
});