CODEWITHSUNDEEP
javaswingsizepanelborder
paulahniuk
paulahniuk

Reputation: 576

How to limit dynamic addition of components within the borders of the form or a panel

I am trying to add components to a jpanel dynamically from a database, one after the other, however they extend beyond the limits of the form (and even the screen) horizontally. I am using a panel with BoxLayout which positions inner components on the x-axis. What I would like to do is limit the addition of components on the x-axis at the border of the form (or the border of the container panel) . What I tried so far is:

Should I make a custom layout? Any ideas simpler than that? My code looks like: 

jpanelCases.setLayout(new BoxLayout(this.jpanelCases, BoxLayout.X_AXIS));
db = Database.getInstance();
List<Category> cats = db.getCategories();
for(Category c : cats){
            JPanel jp = new JPanel();
            //addition of other components to the newly created panel here
            jpanelCases.add(jp);
}

Upvotes: 3

Views: 459

Answers (3)

camickr
camickr

Reputation: 324207

however they extend beyond the limits of the form (and even the screen) horizontally.

So what do you want to do in this case:

a) just ignore the components and not add them to the frame b) display the components on a new line

If the answer is "b", the try the WrapLayout.

Upvotes: 0

Sam
Sam

Reputation: 2446

What about using JScrollPane on the JPanel? This will contain the elements within the panel without exceeding its physical boundaries. Otherwise, if you do not like the scroll idea I suggest that you somehow keep track of the total sum of width of elements added to the panel with respect to the panel physical width, and stop adding elements when the next element width added to the sum exceeds the panel width.

I hope this helps!

Upvotes: 0

Heisenbug
Heisenbug

Reputation: 39204

Try to put 2 glues, one at first one at last:

jpanelCases.setLayout(new BoxLayout(this.jpanelCases, BoxLayout.X_AXIS));

jpanelCases.add(Box.createHorizontalGlue());

db = Database.getInstance();
List<Category> cats = db.getCategories();
for(Category c : cats){
            JPanel jp = new JPanel();
            //addition of other components to the newly created panel here
            jpanelCases.add(jp);
}

jpanelCases.add(Box.createHorizontalGlue());

Upvotes: 0

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