ExpandingFlowLayout.java

package jetbrains.mps.editor.contextActionsTool.pluginSolution.plugin;

/*Generated by MPS */

import java.awt.FlowLayout;
import java.awt.Dimension;
import java.awt.Container;
import java.awt.Component;

/**
 *  When using a component with a normal FlowLayout at the North or South
 *  position of a BorderLayout, some components are not displayed, when they do
 *  not fit into one row.
 *  This is because FlowLayout.preferredLayoutSize expects that only one row is
 *  used, but FlowLayout.layoutComponent uses multiple rows, when there is not
 *  enough space for all components in one row.
 *  This class fixes this behavior with the result that the North/South regions
 *  of a BorderLayout are resized to show all components even with multiple rows.
 */
public class ExpandingFlowLayout extends FlowLayout {
  public ExpandingFlowLayout() {
    this(FlowLayout.LEFT, 0, 0);
  }
  public ExpandingFlowLayout(int align, int hgap, int vgap) {
    super(align, hgap, vgap);
  }
  @Override
  public Dimension preferredLayoutSize(Container target) {
    layoutContainer(target);
    int width = 0;
    int height = 0;
    for (Component c : target.getComponents()) {
      int compRight = c.getX() + c.getWidth();
      int compBottom = c.getY() + c.getHeight();
      width = Math.max(width, compRight);
      height = Math.max(height, compBottom);
    }
    return new Dimension(width, height);
  }
}