Java Prevent BoxLayout From Expanding Children
I have created design GUI using java by programmatically. I want to add some of JPanel to my JFrame (mainwindow). I set JFrame layout using BoxLayout. I am use BoxLayout because want the children resize only width. But, when I resize the mainwindow (JFrame), children width and height is resized. BoxLayout expanding all children width and height.
This is code to add JPanel to my JFrame using BoxLayout :
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JPanelProgress panel1 = new JPanelProgress(); panel1.setBackground(Color.red); JPanelProgress panel2 = new JPanelProgress(); panel2.setBackground(Color.green); JPanelProgress panel3 = new JPanelProgress(); panel3.setBackground(Color.yellow); BoxLayout boxlayout = new BoxLayout(jPanel1, BoxLayout.Y_AXIS); jPanel1.setLayout(boxlayout); jPanel1.add(panel1); jPanel1.add(panel2); jPanel1.add(panel3); |
Output using this code is like this :
Alternatively, we can use Box.Filler prevent BoxLayout resized the childen height. I have modified my code like this :
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JPanelProgress panel1 = new JPanelProgress(); panel1.setBackground(Color.red); JPanelProgress panel2 = new JPanelProgress(); panel2.setBackground(Color.green); JPanelProgress panel3 = new JPanelProgress(); panel3.setBackground(Color.yellow); BoxLayout boxlayout = new BoxLayout(jPanel1, BoxLayout.Y_AXIS); jPanel1.setLayout(boxlayout); jPanel1.add(panel1); jPanel1.add(panel2); jPanel1.add(panel3); //prevent all child height resized jPanel1.add(new Box.Filler(new Dimension(0, 0), new Dimension(0, Short.MAX_VALUE), new Dimension(0, Short.MAX_VALUE))); |
The result using this modified code (prevent BoxLayout expanding all children) is like this :
Add Box.Filler to our BoxLayout prevent all children expanding they height.
Source : http://stackoverflow.com/questions/14010864/keep-boxlayout-from-expanding-children
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