Could anyone please tell me what i should do programmatically to be able to select an item in a listbox using the keyboard when there are multiple items starting with the same character/s. For eg,
•One
•Two
•Three
•Once
•Orange
If i want to get the focus on "Once" by typing o,n,c what should i do? Instead of jumping from one item to the other as opposed to the default behaviour.
Add a KeyPress event handler to the ListBox and track the keys that are presses. Then compare the complete value that already has been typed to the values from the items in the ListBox. If there's a match, select the item.
Related
I have a scenario like in a CCombo box if we select the list option using UP and Down arrow keys then it should select the value and still in editing mode for confirmation until we click enter(This is acceptable for user).
Where if we select the list option using mouse click immediately it should confirm the vale without asking enter key.
Both the key and mouse click notifies the swt.SelectionListener.
In this SelectionListener I need to find weather the selection is made from key or mouse click.
So trying to find the type from this SelectionEvent after widget selected, but unfortunately "type" is not available.
Could anyone help me out in this to find the type? OR any other way to find the event type?
Found an workaround for this issue
https://bugs.eclipse.org/bugs/show_bug.cgi?id=230398
ComboBox cmbCategory, cmbType;
I have two ComboBoxes. The 2nd ComboBox depends on the first ComboBox.
For example.
If I chose "Food" on cmbCategory, the choices on cmbType would be "desert, appetizer..")
How will I do that without clicking a button. I mean when "Food" is chosen on cmbCategory, the choices for food on cmbType would showed up automatically without clicking a button. Because what I have come up to is that my cmbType is hidden and when a button is clicked, then that's the time it will be visible.
I believe this is about MouseListener or MouseClicked but I have no idea on how to do it.
You can add an ActionListener to the cmbCategory. On select call getSelectedItem() to get category.
Define a Map> the map should keep the list f items for each category. Fill the map (or you can define some logic to get list of types by selected category). Then just remove all the existing items in cmbType and add new list of types for the selected category.
See the ombobox related code snippets here
Basically I need to update a list on the event of enter being pressed from a text box with a value inside it e.g. Birmingham
Once enter is pressed, the value from the text box is searched through a ready made library, and the matching values are displayed in the linked list
All that you need to register corresponding ActionListener on your text box.
I am trying to filter a list that is placed into a listview through the use of 2 drop down boxes.
The first dropdown box is titled price and the second is owner.
I want to be able to select a value in one or more of these drop down boxes and then have the List view re-render with the filtered results.
The trouble is I do not know how to begin this task, would someone be so kind as to enlighten me :D
Thanks in advance!
Your best starting point is probably this example: (Source code also available on this page, ChoicePage.java is the name)
First of all, you have to use a dynamic model in your ListView that generates the list of items depending on what you had selected in the dropdown boxes.
Then the basic idea is that you add an AjaxFormComponentUpdatingBehavior to the components that control the updates (your two dropdown boxes in your case), and in the onUpdate() method of this behaviour you should add the component you want to update to that AjaxRequestTarget passed.
I have created a dialog with two JLists displayed and a button that takes the selected value from the second JList and does something (say it outputs the selected value). The list of values from the second JList is updated according to the selection of the value from the first JList.
When the dialog is displayed initially, the button is disabled. When a value is selected from the first and then from the second JList, the button is enabled an the required selection listener is added to it.
The problem is that every time the button is clicked the number of output messages is equal to the time a value of the second JList is selected. For example if I select a value from the second JList, then I change my mind and select another value, the click of the button will output the message two times.
Does anyone know a method to prevent such a thing?
Your ListSelectionListener should check for (e.getValueIsAdjusting() == false) otherwise you'll respond to all of user's selections and not just the final one.
Yes: don't cache the selections, just process the actual selection in your second list.
If possible, post the code that is executed once your button is pressed. I guess, you have some sort of collection (a list or queue) that stores all the selections you do on the dialog and when you press the button, each stored selection is processed.
This looks like an intended behaviour, because you usually don't code this by accident ;)
If it is intended and you just want to eliminate duplicates, consider using a Set instead of a list, as a Set will only contain unique values.
It does perfectly what it should do.
It fires two events,
1> Selection is removed from first item.
2> Selection is done to second item.
So as fbcocq said, you should check for getValueIsAdjusting(). Check this out, it'll help.
Are you adding an ActionListener to the button every time you enable it?