In my form there is a JComboBox, and depending on what is selected I would like to add some additional rows (labels and JTextFields) to the form just below the JComboBox and push the rest of the fields that many rows lower. Is this possible with JGoodies DefaultFormBuilder (or any other technique), and if so how?
As far as I can tell there is no proper way. So what I ended up doing was creating a JPanel for each field with a BoderLayout. Then I added the max number of fields I would ever need to the form. Then when I needed to move fields down, I would remove them from the allocated JPanel's and push them to the ones below in a loop.
Not exactly the prettiest or most elegant but I couldn't find another solution at all...
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I've been using a ComboBox to store some values and make a selection from those values, but the problem is, ComboBox, as it is, only allows one selection at the time and I need multiple selections, ie checkboxes, but that cannot be done via Vaadin. I figured if I could present checkboxes as the elements of the ComboBox, that would solve the issue, except adding components to a component that is not a layout doesn't seem to be possible.
I've done this tutorial https://vaadin.com/docs/-/part/framework/components/components-customcomponent.html
Basically it combines two Vaadin components into one panel and displays them together, but that's not what I need, as I need certain components to be placed inside a parent component.
So what are my options if I'm to do this?
This is not an answer to the question that you are asking (component within a component), but rather the underlying problem that you present. In other words, I believe your question is an example of an XY problem.
I think you want to use a Grid with multi-select turned on. In this mode, check boxes are automatically added to each row and there is a checkbox in the header to allow toggling all on/off, ability to filter, ability to sort columns, etc. See the documentation for more details.
I have a JList with items that I want to show two values. Is there a way to have it show a string name and then have a right justified string to show a value. Looking something like this:
Title__________________120
Title2_________________135
Is it possible to pass in two string to an item and have the first string display on the left and the second one on the right?
Sure, implement a custom renderer. You might return a JPanel with BorderLayout as the rendering component, with the LHS text in the WEST, and the RHS text in the EAST.
Another way is to shove HTML into the default renderer (a JLabel), using an HTML table that stretches across 100% of the width. Though the custom renderer would be a better choice for a number of reasons (e.g. not presuming the type of the default renderer is a label).
BTW - perhaps you should consider using a JTable for this kind of functionality. No hacks or custom classes needed.
..does the jtable allow selecting items?
Of course! Here is an example taken directly from How to Use Tables in the tutorial. 'Jane' is selected.
A table is a little more effort to set up and get right, but it is well worth the effort.
Would a JTable perform just as a JList ..
No, the table ultimately provides more functionality. But the things it does which a list can also do, work (for the user) in much the same way.
I am trying to make a properties frame just like the one in netBeans (or Visual Studio). My problem is that I don't know exactly how to design it. First I thought I'll make it with JTable (2 columns, multiple rows) but then I realised that on the second column I will have different types of values (booleans, String, color choosers, etc.), but I think that JTable allows only 1 type of data to be placed in a column.
I would like someone to tell me "JTable allows multiple data types on the same column" and show me how to do it, or tell me a different approach to the problem.
You can perfectly tell a JTable to have a column that contains Object, this way you will be able to put whatever ou want in.
BUT.
You'll then have to implement a very good TableCellRenderer/TableCellEditor pair in order to display whatever the cell contains.
Another option would be to use a Grid or GridBag layout inside of a JScrollPane, then dynamically populate the cells of the grid with different editors depending on the data type of the property.
If you can use external libraries, the JGoodies FormLayout is really suited to create such dialogs. Just take a look at the screenshots in their demo.
There is also a rather good PDF available containing with some examples and explanations.
Hey,.. i wanna show pictures with names onit in a jList, i know it get's also in a JPanel but i'm now using a jList, doesn't matter..
My question is why does the jlist don't fit the images only in 2 horizontal 'cells' and then go one row down?
sry my english is bad and i don't know how to describe it better, but look on the picture, why does the jlist dont set the e.g. 3rd picture right next to the 2nd?
JList.HORIZONTAL_WRAP works correctly in the ListDialog JWS demo, as described in Initializing a List. I suspect a layout problem, but you might compare your code to the examples found there.
If you use HORIZONTAL_WRAP you can adjust the number of columns with setVisibleRowCount. If you want them automatically fitted to the width of the list, use 0 or something negative.
My current application uses a JList and everything is well (the only customization I did was to set the italic font on some of the rows).
Now I want to "upgrade" the user interface and instead of just labels in the List, I want a checkbox and a text field to be able to update the entry.
I started changing the code and adding a custom cell renderer and a custom cell model. My current problem is that the JPanel that the cell renderer is returning is not using the whole width of the container, so several list items are actually shown on the same line.
But now, I am wondering whether I should just change the whole thing to use JTable. I still need to add / remove items in the list though...
Any suggestion which one is better ? and if going with the JList, how should I go about fixing my current problem ?
In my experience using JTable is usually easier as it allows more complex data and functionality out-of-the-box. Usually when I try to do something the JList can't do, I just switch to JTable without a second thought. What you want sounds like something that should be pretty trivial to implement in a table. I suggest you try it out with some mock data to see if you can make it look and work the way you like (especially in case you want it to look like a list).
Try calling setLayoutOrientation(JList.VERTICAL) on your JList. That will restrict JList to a single column.