Blackberry invalidate field not causing a repaint
- by Michaela
I'm writing a Blackberry app. I have a custom list field where I can select an item in the list which pushes the edit screen onto the stack. I edit the item and save, and when I pop that screen off so I am back on my list screen, I want to view the update I just made reflected in the list. I have done this on other screens which just had LabelFields and it worked fine. However, with the list screen, calling invalidate() seems to do nothing. I know the value has saved correctly through print lines, and I see the paint() method in the listfield is getting called. But the only way I can get the list field to update is to delete it from the screen and re-add it. That seems wrong. What am I doing wrong?
public class ListTasksScreen extends MainScreen{
private TaskList tasks;
private CustomListField taskListField;
public ListTasksScreen (TaskList tasks){
super();
this.tasks = tasks;
Vector incompleteTasks = tasks.getIncompleteTasks();
taskListField = new CustomListField(incompleteTasks, tasks);
add(taskListField);
}
public void updateTaskList(TaskList t)
{
Vector incompleteTasks = t.getIncompleteTasks();
taskListField= new TaskListField(incompletetTasks, t);
//I just want to call taskListField.invalidate() here.
//the only thing that seems to work is deleting taskListField
//and re-adding
this.delete(taskListField);
add(taskListField);
}
}
