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authorAlexander Kurtakov2017-08-10 09:17:06 +0000
committerAlexander Kurtakov2017-08-10 09:17:06 +0000
commitc19e472cde1b3ff09f5e9a3c3e4ac956d70ad84d (patch)
tree067841616bd592b7b6cc3065c12187e9848da8dc /bundles/org.eclipse.swt/Eclipse SWT
parente74c957a5abab5816808d57ce3cfb44bd4d1d075 (diff)
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Bug 520806 - [api] Provide helpers to use lambda expressions for
ExpandListener Add the helpers. Change-Id: Idecdce77c3bdb786d05736b8270215b15823a09e Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT')
-rw-r--r--bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandAdapter.java10
-rw-r--r--bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandListener.java40
2 files changed, 46 insertions, 4 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandAdapter.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandAdapter.java
index 074504391c..b0b7228b3d 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandAdapter.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandAdapter.java
@@ -1,5 +1,5 @@
/*******************************************************************************
- * Copyright (c) 2000, 2016 IBM Corporation and others.
+ * Copyright (c) 2000, 2017 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
@@ -10,7 +10,6 @@
*******************************************************************************/
package org.eclipse.swt.events;
-
/**
* This adapter class provides default implementations for the
* methods described by the <code>ExpandListener</code> interface.
@@ -19,6 +18,13 @@ package org.eclipse.swt.events;
* extend this class and override only the methods which they are
* interested in.
* </p>
+ * <p>
+ * An alternative to this class are the static helper methods
+ * {@link ExpandListener#itemCollapsedAdapter(java.util.function.Consumer)}
+ * and
+ * {@link ExpandListener#itemExpandedAdapter(java.util.function.Consumer)},
+ * which accept a lambda expression or a method reference that implements the event consumer.
+ * </p>
*
* @see ExpandListener
* @see ExpandEvent
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandListener.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandListener.java
index 175fe0e33e..fe43a98255 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandListener.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ExpandListener.java
@@ -1,5 +1,5 @@
/*******************************************************************************
- * Copyright (c) 2000, 2006 IBM Corporation and others.
+ * Copyright (c) 2000, 2017 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
@@ -11,7 +11,9 @@
package org.eclipse.swt.events;
-import org.eclipse.swt.internal.SWTEventListener;
+import java.util.function.*;
+
+import org.eclipse.swt.internal.*;
/**
* Classes which implement this interface provide methods
@@ -46,4 +48,38 @@ public void itemCollapsed(ExpandEvent e);
* @param e an event containing information about the operation
*/
public void itemExpanded(ExpandEvent e);
+
+/**
+ * Static helper method to create a <code>ExpandListener</code> for the
+ * {@link #itemCollapsed(ExpandEvent e)}) method, given a lambda expression or a method reference.
+ *
+ * @param c the consumer of the event
+ * @return ExpandListener
+ * @since 3.107
+ */
+public static ExpandListener itemCollapsedAdapter(Consumer<ExpandEvent> c) {
+ return new ExpandAdapter() {
+ @Override
+ public void itemCollapsed(ExpandEvent e) {
+ c.accept(e);
+ }
+ };
+}
+
+/**
+ * Static helper method to create a <code>ExpandListener</code> for the
+ * {@link #itemExpanded(ExpandEvent e)}) method, given a lambda expression or a method reference.
+ *
+ * @param c the consumer of the event
+ * @return ExpandListener
+ * @since 3.107
+ */
+public static ExpandListener itemExpandedAdapter(Consumer<ExpandEvent> c) {
+ return new ExpandAdapter() {
+ @Override
+ public void itemExpanded(ExpandEvent e) {
+ c.accept(e);
+ }
+ };
+}
}

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