org.argeo.cms.ui/src/org/argeo/cms/widgets/ScrolledPage.java

   1 package org.argeo.cms.widgets;
   2
   3 import org.eclipse.swt.SWT;
   4 import org.eclipse.swt.custom.ScrolledComposite;
   5 import org.eclipse.swt.events.ControlEvent;
   6 import org.eclipse.swt.graphics.Point;
   7 import org.eclipse.swt.graphics.Rectangle;
   8 import org.eclipse.swt.widgets.Composite;
   9
  10 /**
  11  * A composite that can be scrolled vertically. It wraps a
  12  * {@link ScrolledComposite} (and is being wrapped by it), simplifying its
  13  * configuration.
  14  */
  15 public class ScrolledPage extends Composite {
  16         private static final long serialVersionUID = 1593536965663574437L;
  17
  18         private ScrolledComposite scrolledComposite;
  19
  20         public ScrolledPage(Composite parent, int style) {
  21                 super(new ScrolledComposite(parent, SWT.V_SCROLL), style);
  22                 scrolledComposite = (ScrolledComposite) getParent();
  23                 scrolledComposite.setContent(this);
  24
  25                 scrolledComposite.setExpandVertical(true);
  26                 scrolledComposite.setExpandHorizontal(true);
  27                 scrolledComposite.addControlListener(new ScrollControlListener());
  28         }
  29
  30         @Override
  31         public void layout(boolean changed, boolean all) {
  32                 updateScroll();
  33                 super.layout(changed, all);
  34         }
  35
  36         protected void updateScroll() {
  37                 Rectangle r = scrolledComposite.getClientArea();
  38                 Point preferredSize = computeSize(r.width, SWT.DEFAULT);
  39                 scrolledComposite.setMinHeight(preferredSize.y);
  40         }
  41
  42         // public ScrolledComposite getScrolledComposite() {
  43         // return this.scrolledComposite;
  44         // }
  45
  46         /** Set it on the wrapping scrolled composite */
  47         @Override
  48         public void setLayoutData(Object layoutData) {
  49                 scrolledComposite.setLayoutData(layoutData);
  50         }
  51
  52         private class ScrollControlListener extends
  53                         org.eclipse.swt.events.ControlAdapter {
  54                 private static final long serialVersionUID = -3586986238567483316L;
  55
  56                 public void controlResized(ControlEvent e) {
  57                         updateScroll();
  58                 }
  59         }
  60 }