jdk/src/macosx/classes/sun/lwawt/LWLabelPeer.java
changeset 12047 320a714614e9
child 12813 c10ab96dcf41
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/macosx/classes/sun/lwawt/LWLabelPeer.java	Tue Mar 06 20:34:38 2012 +0000
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+package sun.lwawt;
+
+import java.awt.Dimension;
+import java.awt.FontMetrics;
+import java.awt.Label;
+import java.awt.peer.LabelPeer;
+
+import javax.swing.JLabel;
+import javax.swing.SwingConstants;
+
+/**
+ * Lightweight implementation of {@link LabelPeer}. Delegates most of the work
+ * to the {@link JLabel}.
+ */
+final class LWLabelPeer extends LWComponentPeer<Label, JLabel>
+        implements LabelPeer {
+
+    private static final int TEXT_XPAD = 5;
+    private static final int TEXT_YPAD = 1;
+
+    LWLabelPeer(final Label target, final PlatformComponent platformComponent) {
+        super(target, platformComponent);
+    }
+
+    @Override
+    protected JLabel createDelegate() {
+        final JLabel label = new JLabel();
+        label.setVerticalAlignment(SwingConstants.TOP);
+        return label;
+    }
+
+    @Override
+    public void initialize() {
+        super.initialize();
+        setText(getTarget().getText());
+        setAlignment(getTarget().getAlignment());
+    }
+
+    @Override
+    public void setText(final String label) {
+        synchronized (getDelegateLock()) {
+            getDelegate().setText(label);
+        }
+    }
+
+    @Override
+    public void setAlignment(final int alignment) {
+        synchronized (getDelegateLock()) {
+            getDelegate().setHorizontalAlignment(convertAlignment(alignment));
+        }
+    }
+
+    @Override
+    public Dimension getMinimumSize() {
+        int w = TEXT_XPAD;
+        int h = TEXT_YPAD;
+        final FontMetrics fm = getFontMetrics(getFont());
+        if (fm != null) {
+            final String text;
+            synchronized (getDelegateLock()) {
+                text = getDelegate().getText();
+            }
+            if (text != null) {
+                w += fm.stringWidth(text);
+            }
+            h += fm.getHeight();
+        }
+        return new Dimension(w, h);
+    }
+
+    /**
+     * Converts {@code Label} alignment constant to the {@code JLabel} constant.
+     * If wrong Label alignment provided returns default alignment.
+     *
+     * @param alignment {@code Label} constant.
+     *
+     * @return {@code JLabel} constant.
+     */
+    private static int convertAlignment(final int alignment) {
+        switch (alignment) {
+            case Label.CENTER:
+                return SwingConstants.CENTER;
+            case Label.RIGHT:
+                return SwingConstants.RIGHT;
+            default:
+                return SwingConstants.LEFT;
+        }
+    }
+}