diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/CanvasAlternateSelection.java')
-rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/CanvasAlternateSelection.java | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/CanvasAlternateSelection.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/CanvasAlternateSelection.java new file mode 100644 index 000000000..c04061cbd --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/CanvasAlternateSelection.java @@ -0,0 +1,73 @@ +/* + * Copyright (C) 2009 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.eclipse.adt.internal.editors.layout.gle2; + +import java.util.List; + +/** + * Information for the current alternate selection, i.e. the possible selected items + * that are located at the same x/y as the original view, either sibling or parents. + */ +/* package */ class CanvasAlternateSelection { + private final CanvasViewInfo mOriginatingView; + private final List<CanvasViewInfo> mAltViews; + private int mIndex; + + /** + * Creates a new alternate selection based on the given originating view and the + * given list of alternate views. Both cannot be null. + */ + public CanvasAlternateSelection(CanvasViewInfo originatingView, List<CanvasViewInfo> altViews) { + assert originatingView != null; + assert altViews != null; + mOriginatingView = originatingView; + mAltViews = altViews; + mIndex = altViews.size() - 1; + } + + /** Returns the list of alternate views. Cannot be null. */ + public List<CanvasViewInfo> getAltViews() { + return mAltViews; + } + + /** Returns the originating view. Cannot be null. */ + public CanvasViewInfo getOriginatingView() { + return mOriginatingView; + } + + /** + * Returns the current alternate view to select. + * Initially this is the top-most view. + */ + public CanvasViewInfo getCurrent() { + return mIndex >= 0 ? mAltViews.get(mIndex) : null; + } + + /** + * Changes the current view to be the next one and then returns it. + * This loops through the alternate views. + */ + public CanvasViewInfo getNext() { + if (mIndex == 0) { + mIndex = mAltViews.size() - 1; + } else if (mIndex > 0) { + mIndex--; + } + + return getCurrent(); + } +} |