Scala example source code file (GridBagDemo.scala)

This example Scala source code file (GridBagDemo.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

awt, button, button, constraints, demo, demo, gridbag, gridbagdemo, gridbagdemo, gridbagpanel, insets, long-named, mainframe, mainframe, simpleswingapplication

The Scala GridBagDemo.scala source code

package scala.swing
package test

import swing._
import swing.event._
import GridBagPanel._
import java.awt.Insets

object GridBagDemo extends SimpleSwingApplication {
  lazy val ui = new GridBagPanel {
    val c = new Constraints
    val shouldFill = true
    if (shouldFill) {
      c.fill = Fill.Horizontal
    }

    val button1 = new Button("Button 1") 
    
    c.weightx = 0.5

    c.fill = Fill.Horizontal
    c.gridx = 0;
    c.gridy = 0;
    layout(button1) = c

    val button2 = new Button("Button 2")
    c.fill = Fill.Horizontal
    c.weightx = 0.5;
    c.gridx = 1;
    c.gridy = 0;
    layout(button2) = c

    val button3 = new Button("Button 3")
    c.fill = Fill.Horizontal
    c.weightx = 0.5;
    c.gridx = 2;
    c.gridy = 0;
    layout(button3) = c

    val button4 = new Button("Long-Named Button 4")
    c.fill = Fill.Horizontal
    c.ipady = 40;      //make this component tall
    c.weightx = 0.0;
    c.gridwidth = 3;
    c.gridx = 0;
    c.gridy = 1;
    layout(button4) = c

    val button5 = new Button("5")
    c.fill = Fill.Horizontal
    c.ipady = 0;       //reset to default
    c.weighty = 1.0;   //request any extra vertical space
    c.anchor = Anchor.PageEnd
    c.insets = new Insets(10,0,0,0);  //top padding
    c.gridx = 1;       //aligned with button 2
    c.gridwidth = 2;   //2 columns wide
    c.gridy = 2;       //third row
    layout(button5) = c
  }
  
  def top = new MainFrame {
    title = "GridBag Demo"
    contents = ui
  }
}