* FYI: New Container.getPreferredSize test
@ 2006-01-30 21:27 Roman Kennke
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From: Roman Kennke @ 2006-01-30 21:27 UTC (permalink / raw)
To: mauve-patches
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I committed the attached patch that tests an interesting detail in
Container.getPreferredSize(). In particular this tests if
Container.getPreferredSize() should call invalidateLayout() on a
LayoutManager before asking for it's preferredLayoutSize() when the
Container is invalid. This would make sense, but it seems that this is
not done.
2006-01-30 Roman Kennke <kennke@aicas.com>
* gnu/testlet/java/awt/Container/getPreferredSize.java:
New test.
/Roman
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Index: gnu/testlet/java/awt/Container/getPreferredSize.java
===================================================================
RCS file: gnu/testlet/java/awt/Container/getPreferredSize.java
diff -N gnu/testlet/java/awt/Container/getPreferredSize.java
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ gnu/testlet/java/awt/Container/getPreferredSize.java 30 Jan 2006 21:25:04 -0000
@@ -0,0 +1,139 @@
+/* getPreferredSize.java -- Tests the getPreferredSize() method
+ Copyright (C) 2006 Roman Kennke (kennke@aicas.com)
+This file is part of Mauve.
+
+Mauve is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+Mauve is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Mauve; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+*/
+
+// Tags: JDK1.1
+
+package gnu.testlet.java.awt.Container;
+
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.LayoutManager2;
+
+import gnu.testlet.TestHarness;
+import gnu.testlet.Testlet;
+
+/**
+ * Tests the getPreferredSize method.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+public class getPreferredSize implements Testlet
+{
+
+ /**
+ * Indicates if invalideLayout has been called on the layout manager or
+ * not.
+ */
+ boolean invalidateCalled;
+
+ /**
+ * A layout manager used for testing.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+ class TestLM implements LayoutManager2
+ {
+
+ public void addLayoutComponent(Component component, Object constraints)
+ {
+ // Nothing to do here.
+ }
+
+ public Dimension maximumLayoutSize(Container target)
+ {
+ // Nothing to do here.
+ return null;
+ }
+
+ public float getLayoutAlignmentX(Container target)
+ {
+ // Nothing to do here.
+ return 0;
+ }
+
+ public float getLayoutAlignmentY(Container target)
+ {
+ // Nothing to do here.
+ return 0;
+ }
+
+ public void invalidateLayout(Container target)
+ {
+ invalidateCalled = true;
+ }
+
+ public void addLayoutComponent(String name, Component component)
+ {
+ // Nothing to do here.
+ }
+
+ public void removeLayoutComponent(Component component)
+ {
+ // Nothing to do here.
+ }
+
+ public Dimension preferredLayoutSize(Container parent)
+ {
+ return new Dimension(100, 100);
+ }
+
+ public Dimension minimumLayoutSize(Container parent)
+ {
+ // Nothing to do here.
+ return null;
+ }
+
+ public void layoutContainer(Container parent)
+ {
+ // Nothing to do here.
+ }
+
+ }
+
+ /**
+ * The entry point into the test.
+ */
+ public void test(TestHarness harness)
+ {
+ testInvalid(harness);
+ }
+
+ /**
+ * Tests if the container should call invalidateLayout() before asking the
+ * preferredSize from a layout manager. The background is that in theory
+ * this could lead to wrong value for preferredSize, when a layout manager
+ * caches the preferredSize.
+ *
+ * @param harness the test harness to use
+ */
+ private void testInvalid(TestHarness harness)
+ {
+ Container c = new Container();
+ LayoutManager2 lm = new TestLM();
+ c.setLayout(lm);
+ c.invalidate();
+ invalidateCalled = false;
+ c.getPreferredSize();
+ c.getPreferredSize();
+ harness.check(invalidateCalled, false);
+ }
+}
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