How do I pass information from a multi-selection JTree? - java

I am writing a program that will print information based on selections in a JTree. Multi-selection is enabled, but I haven't been able to figure out how to find out which nodes are selected. Because it is a very large tree, I would prefer to have a Vector of selections which is updated each time a selection/deselection is made, instead of scanning the tree when the print button is pressed. What is the best way of doing this? Thanks in advance for your help.

You can use getSelectionPaths() which will return all selected nodes.

Related

Highlight specific item in treetableview or treeview

I have two TreeViews/TreeTableViews. When clicking on a specific TreeItem in one of those Trees I first collapse the other Tree and then expand only the path to the Item that holds the same information. This is already working nicely.
What is missing still: When expanding the second path of the second Tree I would like Highlight the TreeItem in the second Tree that hold the same information for a shot time( a second or so).
I tried to set it selected and played around setStyle function, which did not have any effect.
Could you give me a hint how to solve this?
Thanks in advance

In Eclipse Debugger, getting the index location of a variable in an embeded list hierachy

Is anyone familiar with a debugging option that has the feature? I have a list of items in a JComboBox deeply embedded in a swing app that is buried withing multiple lists. Is there is away to find the index of these items in the Eclipse Debugger without writing code? I could manually write down the index of every list, but I'm looking for an easier way to tell me that this location is at parent[2].layer[0].child[3].layer[1].child[0].combobox[4].item[5]
without looking scrolling through the variable list.
Thanks!
When debugging, in the variables/Expressions pane, at the top right there should be a button with an arrow going to the right called "Show Logical Structure".
If you tick/untick that it should change the display of list structures. It might help you out.

Jcombobox with Jcheckboxes

how can I create (with JAVA) Combobox that contains Checkboxes for multiple selection and display the selected items in the Combobox like this picture:
click to see the pic
and thnx for advance.
EDIT:
I found this API (JAPURA API) and it's great but when I select multiple things I want to display the selected items instead of "* multiple items *".
Here's the link to achieve your goal:
JComboBox Providing a Custom Renderer
I would suggest you create a JButton and style it in the form of a Combobox if you want that.
Then, at the onclick function (actionperformed), you create a JPanel and make it visible under the button. In the panel, you can put whatever you want, so you just put checkboxes there.
I know this is kind of a workaround of your problem, but it should be easy for you to do so, and the actual user does not see a difference at all.
Hope I could help you.
Cheers,
Lucky

Best way to implement a selection box from a large number of entries

I have a large set of data from which the user has to select one. I'm thinking of a way to implement it (of course, in a GUI). I have a few ideas. But just thought of posting here as there may be better alternatives..
Say, user has to select a name from a large set of user base. If I simply put a text field for user to enter the name, then there can be issues like entering same name in different formats, misspelling etc...
I see two options here
Using a combo box
Using a list (Actually i'm thinking of something like a tool tip. As I cant show the whole list always due to space issues)
But combo box won't be much user friendly i guess. As the user will have to scroll around the whole list to select an entry. If the number of entries are too large, this will be
Which means, now I'm left only one option. A popping up list, which will change the content according the text user is entering in the text field. So he can type first few letters and the list will show all the entries starting from the entered text. Got my point, right?
Are there any other better to achieve this kind of need?
If I'm going to implement above, what will be the best way to follow. I'm thinking of extending the JTextField to add required functionality. Well, I'll put some method to set the popup list entries. And I'll add some actionListner to watch the text field, and control the popup list accordingly...
Autocomplete is what you are probably looking for. Google for "java swing jcombobox autocomplete" and limit results for the last couple of years to get relevant results. There will be a lot of examples and ideas on how to implement this with custom code.
I believe there is also some custom libraries like "swingx" that provide at least partial or full implementations to save time.
http://swingx.java.net/
They have released code as recently as the beginning of this years so it appears active and might have what you need.
You could take a look at SwingLab's autocomplete feature, it allows you to attach it to a JCombBox, JList or JTextComponent
use AutoComplete JComboBox/JTextField
based on Standard Java Classes
no issue with larger sets of data
no issue with Focus, BackSpace Key, Caret
for better performance to required sort the array before use
simple workaround for setStrict(true/false), restrict input to array

Filtering a ListView in wicket using 2 drop down boxes

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.

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