private void add() {
// validate input..
if (nameTxt.getText().equals("")
|| nameTxt.getText() == null && urlTxt.getText().equals("")
|| urlTxt.getText() == null) {
// invalid input..
Dialog.alert("Enter Feed Name and URL");
} else {
// get the new feed name and url
String feedName = nameTxt.getText();
String feedUrl = urlTxt.getText();
if (feedUrl.indexOf("http://") == -1) {
Dialog.alert("Feed URL must begin with http://");
} else {
// create new Feed object/store it at same time
Feed newFeed = new Feed(feedName, feedUrl);
databaseManager.getFeeds().addElement(newFeed);
// add the new Feed to the end of the feeds list
list.insert(list.getSize());
FeedsListCallback callback = (FeedsListCallback) list.getCallback();
callback.insert(newFeed);
// close dialog..
close();
}
}
}
public class AddFeedDialog extends PopupScreen {
private ObjectListField list;
private EditField nameTxt;
private EditField urlTxt;
private ButtonField addBtn;
private ButtonField cancelBtn;
private DatabaseManager databaseManager = DatabaseManager.getInstance();
public AddFeedDialog(ObjectListField list) {
super(
new VerticalFieldManager(VERTICAL_SCROLLBAR | VERTICAL_SCROLL),
DEFAULT_MENU | Field.FOCUSABLE);
this.list = list;
// title label to sit at top of screen
LabelField titleLbl = new LabelField("Add a Feed", Field.FIELD_HCENTER);
titleLbl.setFont(titleLbl.getFont().derive(Font.BOLD));
titleLbl.setMargin(new XYEdges(0, 0, 10, 0)); // top,right,bottom,left
// set up fields..
LabelField nameLbl = new LabelField("Name");
nameTxt = new TextField(500);
LabelField urlLbl = new LabelField("Address");
urlTxt = new TextField(500, EditField.FILTER_URL);
addBtn = new ButtonField("Add", ButtonField.CONSUME_CLICK | Field.FIELD_HCENTER);
cancelBtn = new ButtonField("Cancel", ButtonField.CONSUME_CLICK | Field.FIELD_HCENTER);
// add everything to the screen..
HorizontalFieldManager buttonsManager = new HorizontalFieldManager(Field.FIELD_HCENTER);
buttonsManager.setMargin(new XYEdges(10, 0, 5, 0)); // top,right,bottom,left
buttonsManager.add(addBtn);
buttonsManager.add(cancelBtn);
this.add(titleLbl);
this.add(nameLbl);
this.add(nameTxt);
this.add(urlLbl);
this.add(urlTxt);
this.add(buttonsManager);
// add action listeners to buttons..
addBtn.setChangeListener(
new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
add();
}
});
cancelBtn.setChangeListener(
new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
cancel();
}
});
}
public void showDialog() {
UiApplication.getUiApplication().pushScreen(this);
}
private void add() {
// validate input..
if (nameTxt.getText().equals("")
|| nameTxt.getText() == null && urlTxt.getText().equals("")
|| urlTxt.getText() == null) {
// invalid input..
Dialog.alert("Enter Feed Name and URL");
} else {
// get the new feed name and url
String feedName = nameTxt.getText();
String feedUrl = urlTxt.getText();
if (feedUrl.indexOf("http://") == -1) {
Dialog.alert("Feed URL must begin with http://");
} else {
// create new Feed object/store it at same time
Feed newFeed = new Feed(feedName, feedUrl);
databaseManager.getFeeds().addElement(newFeed);
// add the new Feed to the end of the feeds list
list.insert(list.getSize());
FeedsListCallback callback = (FeedsListCallback) list.getCallback();
callback.insert(newFeed);
// close dialog..
close();
}
}
}
private void cancel() {
close();
}
/*
* to handle if the user presses the escape button to
* get rid of the dialog/cancel it
*/
public boolean keyChar(char key, int status, int time) {
if (key == Characters.ESCAPE) {
this.close();
} else if (key == Characters.ENTER) {
add();
}
return super.keyChar(key, status, time);
}
}