Vertical BoxLayout-managed container : BoxLayout « Swing « Java Tutorial

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Java Tutorial » Swing » BoxLayout 
14. 87. 13. Vertical BoxLayout-managed container
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.LayoutManager;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class VerticalBoxLayoutManagerContainerTest {

  public static void main(String[] args) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container pane = new BoxPanel();
    f.setContentPane(pane);
    BoxLayout bl = new BoxLayout(pane, BoxLayout.Y_AXIS);
    pane.setLayout(bl);
    for (float align = 0.0f; align <= 1.0f; align += 0.25f) {
      JButton button = new JButton("X Alignment = " + align);
      button.setAlignmentX(align);
      pane.add(button);
      pane.add(Box.createRigidArea(new Dimension(015)));
    }
    f.setSize(400300);
    f.setVisible(true);
  }
}

class BoxPanel extends JPanel {

  public void paintChildren(Graphics g) {
    super.paintChildren(g);
    Dimension size = getSize();
    LayoutManager manager = getLayout();
    if ((manager != null&& (manager instanceof BoxLayout)) {
      BoxLayout layout = (BoxLayoutmanager;
      boolean vertical = true;
      if (vertical) {
        int axis = (int) (layout.getLayoutAlignmentX(this* size.width);
        g.fillRect(axis - 103, size.height);
      else {
        int axis = (int) (layout.getLayoutAlignmentY(this* size.height);
        g.fillRect(0, axis - 1, size.width, 3);
      }
    }
  }

}
14. 87. BoxLayout
14. 87. 1. Using a BoxLayout ManagerUsing a BoxLayout Manager
14. 87. 2. Creating a BoxLayoutCreating a BoxLayout
14. 87. 3. A Simple BoxLayout TestA Simple BoxLayout Test
14. 87. 4. Struts and GlueStruts and Glue
14. 87. 5. Y-Axis AlignmentY-Axis Alignment
14. 87. 6. X-Axis AlignmentX-Axis Alignment
14. 87. 7. Drawing Borders Within a BoxLayout-Managed ContainerDrawing Borders Within a BoxLayout-Managed Container
14. 87. 8. Separating Components in a Row or Column
14. 87. 9. Glue spreads the components as far apart as possible.
14. 87. 10. Strut spreads the components apart by a fixed distance
14. 87. 11. Laying Out Components in a Row or Column
14. 87. 12. A vertical box container arranges the components top-to-bottom aligned in their preferred sizes.
14. 87. 13. Vertical BoxLayout-managed container
14. 87. 14. Align your components in horizontal or vertical layout
14. 87. 15. BoxLayout: set a rigid area among our components.
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