Change ScrolledPage package

[lgpl/argeo-commons.git] / eclipse / org.argeo.cms.swt / src / org / argeo / cms / swt / widgets / ScrolledPage.java

diff --git a/eclipse/org.argeo.cms.swt/src/org/argeo/cms/swt/widgets/ScrolledPage.java b/eclipse/org.argeo.cms.swt/src/org/argeo/cms/swt/widgets/ScrolledPage.java
new file mode 100644 (file)
index 0000000..135f4c1
--- /dev/null
+++ b/eclipse/org.argeo.cms.swt/src/org/argeo/cms/swt/widgets/ScrolledPage.java
@@ -0,0 +1,74 @@
+package org.argeo.cms.swt.widgets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.ScrolledComposite;
+import org.eclipse.swt.events.ControlEvent;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+
+/**
+ * A composite that can be scrolled vertically. It wraps a
+ * {@link ScrolledComposite} (and is being wrapped by it), simplifying its
+ * configuration.
+ */
+public class ScrolledPage extends Composite {
+       private static final long serialVersionUID = 1593536965663574437L;
+
+       private ScrolledComposite scrolledComposite;
+
+       public ScrolledPage(Composite parent, int style) {
+               this(parent, style, false);
+       }
+
+       public ScrolledPage(Composite parent, int style, boolean alwaysShowScroll) {
+               super(createScrolledComposite(parent, alwaysShowScroll), style);
+               scrolledComposite = (ScrolledComposite) getParent();
+               scrolledComposite.setContent(this);
+
+               scrolledComposite.setExpandVertical(true);
+               scrolledComposite.setExpandHorizontal(true);
+               scrolledComposite.addControlListener(new ScrollControlListener());
+       }
+
+       private static ScrolledComposite createScrolledComposite(Composite parent, boolean alwaysShowScroll) {
+               ScrolledComposite scrolledComposite = new ScrolledComposite(parent, SWT.V_SCROLL);
+               scrolledComposite.setAlwaysShowScrollBars(alwaysShowScroll);
+               return scrolledComposite;
+       }
+
+       @Override
+       public void layout(boolean changed, boolean all) {
+               updateScroll();
+               super.layout(changed, all);
+       }
+
+       public void showControl(Control control) {
+               scrolledComposite.showControl(control);
+       }
+
+       protected void updateScroll() {
+               Rectangle r = scrolledComposite.getClientArea();
+               Point preferredSize = computeSize(r.width, SWT.DEFAULT);
+               scrolledComposite.setMinHeight(preferredSize.y);
+       }
+
+       // public ScrolledComposite getScrolledComposite() {
+       // return this.scrolledComposite;
+       // }
+
+       /** Set it on the wrapping scrolled composite */
+       @Override
+       public void setLayoutData(Object layoutData) {
+               scrolledComposite.setLayoutData(layoutData);
+       }
+
+       private class ScrollControlListener extends org.eclipse.swt.events.ControlAdapter {
+               private static final long serialVersionUID = -3586986238567483316L;
+
+               public void controlResized(ControlEvent e) {
+                       updateScroll();
+               }
+       }
+}