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Thread: Changing colors of items in list dynamically based on external parameter

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    Question Changing colors of items in list dynamically based on external parameter

    My requirement:

    I have a JList with the list of some store names.
    There is a function that checks the online connectivity of the store or the current state of the store.
    Based on the return value of the function, I need to highlight those store names correspondingly.

    I understand that the JList has a one-dimensional array model. Hence, I cannot save an extra column of data ie. store name, status in the model.

    Is there a way I can use that external parameter 'status' in my ListCellRenderer to change the colors of items in my list?

    Please give me some pointers.


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    Default Re: Changing colors of items in list dynamically based on external parameter

    You could store the Store Objects directly in the JList. Then in the renderer, render the store's name and use whatever other Store functions you need to figure out what the cell should look like.
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    Default Re: Changing colors of items in list dynamically based on external parameter

    Thanks!! it worked!! Somehow it didn't strike me that I could use Object array within the renderer.
    Thank you
    Last edited by prathyusha; October 12th, 2011 at 03:22 PM.

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    Default Re: Changing colors of items in list dynamically based on external parameter

    Quote Originally Posted by prathyusha View Post
    Thanks!! it worked!! Somehow it didn't strike me that I could use Object array within the renderer.
    Thank you
    No problem, glad you got it sorted.
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    Default Re: Changing colors of items in list dynamically based on external parameter

    I got the color rendering done by using an array of objects for every list item.

    Now, I have to retrieve a list item based on the selected value. My list model contains 3 columns. But when I retrieve using Object obj = listModel.getselectedItem(index), it returns an Object which is of type Object[3] . However, when I try to access obj[0], i get an error saying it is not an array of objects. The return type of getSelectedItem is an Object. So, I am stuck with this conversion now.

    Any ideas?

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    Default Re: Changing colors of items in list dynamically based on external parameter

    Can't you just cast it? If not, we're going to need to see an SSCCE that demonstrates what you mean.
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