diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/IgnoredLayoutRule.java')
-rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/IgnoredLayoutRule.java | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/IgnoredLayoutRule.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/IgnoredLayoutRule.java new file mode 100644 index 000000000..3a65a8601 --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/IgnoredLayoutRule.java @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Eclipse Public License, Version 1.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.eclipse.org/org/documents/epl-v10.php + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.ide.common.layout; + +import com.android.annotations.NonNull; +import com.android.annotations.Nullable; +import com.android.ide.common.api.DropFeedback; +import com.android.ide.common.api.IDragElement; +import com.android.ide.common.api.INode; + +/** + * An ignored layout is a layout that should not be treated as a layout by the + * visual editor (usually because the widget extends a layout class we recognize + * and support, but where the widget is more restrictive in how it manages its + * children so we don't want to expose the normal configuration options). + * <p> + * For example, the ZoomControls widget is not user-configurable as a + * LinearLayout even though it extends it. Our ZoomControls rule is therefore a + * subclass of this {@link IgnoredLayoutRule} class. + */ +public abstract class IgnoredLayoutRule extends BaseLayoutRule { + @Override + public DropFeedback onDropEnter(@NonNull INode targetNode, @Nullable Object targetView, + @Nullable IDragElement[] elements) { + // Do nothing; this layout rule corresponds to a layout that + // should not be handled as a layout by the visual editor - usually + // because some widget is extending a layout for implementation purposes + // but does not want to expose configurability of the base layout in the + // editor. + return null; + } +} |