Re: Problem with GridLayout

From:

Vova Reznik <address@mail.com>

Newsgroups:

comp.lang.java.gui

Date:

Tue, 23 May 2006 13:36:17 GMT

Message-ID:

<ldEcg.32202$4L1.10364@newssvr11.news.prodigy.com>

erenay wrote:

Hi everybody, I'm having a problem with the layout of my application.
When I run the following code, I only see one graph in the frame. I'm
sopposed to see "graphNum" graphs in a row.
This part of code runs when I press the "draw graph" button:

   public void run() {
       Graph[] graphs = new Graph[graphNum];
       JFrame frame = new JFrame();
       for(int i=0; i<graphNum; i++){
         graphs[i] = new Graph();
         SliceVal[] sliceValA = new SliceVal[sliceNum];
         for(int j=0;j<sliceNum;j++){
           sliceValA[j] = new SliceVal(new BigDecimal(10.0),
colors[j]);
         }
         graphs[i].setSliceVal(sliceValA);
       }
       JPanel grafPanel = new JPanel();
       graphPanel.setLayout(new GridLayout(1,graphNum));
       for (int i=0; i<graphNum; i++) {
         grafPanel.add(graphs[i]);
       }
       frame.getContentPane().add(graphPanel);
       frame.setSize(300, 200);

Your GridLayout set to show one row with graphNum columns,
but you limited width of the graphPanel by setting size for the
JFrame.
Try to replace
frame.setSize(300, 200);
with
frame.pack();

Also check preferred size of graph. Looks like it has width
equals or bigger than 300.

http://java.sun.com/docs/books/tutorial/uiswing/layout/grid.html

       frame.setVisible(true);
    }
  }

SliceVal class holds the value and color of a slice of the pie chart.
Graph class extends JComponent and has a paint() function in it.
I set the values of slices to 10.0 for simplifying the code

Do you see an error in the code above?
I would appreciate any help, thank you.