How would I make a spinner that on select changes two values in an Async download task? (The URL and filename) I can only figure out how to change one value in the spinner, is it possible to change two in the same drop down list on select? Do I need a submit button or can I have it start the download process just on select? I think its possible but I've never worked with spinners.
What if you make a function to take care of changing the values, and then simply make the spinner's onSelect listener call that function?
I don't have too much experience working with spinners myself either, but that's the first way I'd go about trying to do it...
Related
I'm working on creating a basic user interface and I wanted to try and create a portion that is in a scrollTaskPane and is capable of holding multiple entries. As I'm going about creating it I can obviously test it with a simple amount of entries but I'm confused how I can go about later allowing for it to take input to create entries in the scrollTaskPane of maybe 1 entry one time, and then later needing to allow for input of 20 entries. I only know how to use absolute positioning and am trying to figure out the best way to go about it. I also need to later be able to select each entry.
For the entries that will eventually be called and displayed in my interface, I'm planning to store them in a simple text file and use a semicolon as a delimiter between the task "Type" "Name" "Description"(which will be accessible through a button) and "Due Date". Or I may try to learn to use a database for the information. But I haven't decided yet and don't know anything about connecting a database with a java program.
This is the current look (the scrollTaskPane in the middle). And my goal is to put in entries that are each rectangle boxes going across the scrollTaskPane with a checkbox on the end of them. Should I use some sort of grid layout? Or something else? I'm a beginner at user interfaces, so any help is appreciated!
You can make a custom layout, and then keep adding those layout. So extend a layout class, add TextField and a check box in the layout. Initialize the layout with your values, add then add to the ScrollTaskPane.
Alright so I'm trying to create a combo box that will update it's contents during runtime except I have no clue how to do this without receiving a bunch of errors. Is there some sort of method that I can use in order to accomplish this? For example, I have a vector that might start out with the name in drawers 1 and 2 be hi and bye. Then during runtime the program will change drawer one and two to eggs, sausage and add a third drawer with the name being computer. How can I go about changing the name on a JComboBox during runtime?
You want to clear the combobox of all entries using removeAllItems(), then re-add the items from the Vector using addItem().
The data shown in the ComboBox actually lives in its model - some subclass of ComboBoxModel.
DefaultComboBoxModel has methods for adding and removing elements. If you want to completely replace the combo box's contents at runtime, the simplest way might be to just build a new model and call theComboBox.setModel(theNewModel) with it. Also see setSelectedItem() for setting the selection.
OK a complete revision:
I have a JFrame with a tab that has buttons/textfields etc. inside.Buttons have events that does simple things like reading from an SQL server and filling the textfields from the received query.Pretty simple eh? And now ,I need to add more tabs to this Frame and have to have multiple tabs.In each tab I "must" have the same components/events. So what I am asking is this,how can I clone all the components/events/keylisteners etc. (whatever i have inside that tab) to another tab? I could always add the same components with different names from the code,but I need to find a way to clone the whole tab..
Why not keep the components you already have without duplicating them, and figure out a way to store all the data to be displayed in some kind of model. You could create only some buttons to simulate the tabs, and when clicking on one you display the data associated with it.
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 am writing a Java application for digitizing a group of documents in the office that I am working in and I am wanting to check if 5 textfields are populated and 4 combobox fields as well before the save button is enabled (I have it checking if i press a button (that happily says "Check"), but i would much rather have it auto-check to see if they are populated or if they are null).
If it makes a difference i am using NetBeans for this project.
Basically I need the fields to have something in them before the document can be saved.
Any and all help will be greatly appreciated as this is the final step in creating this application... :D
Thanks,
Erik
There are two ways (I can think of):
1- Put a listener on each field, this listener will be triggered when the field is populated. Inside the listener increment a counter for example, or set a flag. If all flags are set or if the counter reaches (9 in your example) then enable the button.
2- Enable the Save button, but call a validate() method before doing the Save action. Any unpopulated field will have a red mark beside it (shown by validating) like in web applications.