diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/HorizontalScrollViewRule.java')
-rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/HorizontalScrollViewRule.java | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/HorizontalScrollViewRule.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/HorizontalScrollViewRule.java new file mode 100644 index 000000000..722949051 --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/HorizontalScrollViewRule.java @@ -0,0 +1,96 @@ +/* + * 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 static com.android.SdkConstants.ANDROID_URI; +import static com.android.SdkConstants.ATTR_LAYOUT_HEIGHT; +import static com.android.SdkConstants.ATTR_LAYOUT_WIDTH; +import static com.android.SdkConstants.ATTR_ORIENTATION; +import static com.android.SdkConstants.FQCN_LINEAR_LAYOUT; +import static com.android.SdkConstants.VALUE_HORIZONTAL; + +import com.android.annotations.NonNull; +import com.android.annotations.Nullable; +import com.android.ide.common.api.DrawingStyle; +import com.android.ide.common.api.DropFeedback; +import com.android.ide.common.api.IDragElement; +import com.android.ide.common.api.IGraphics; +import com.android.ide.common.api.INode; +import com.android.ide.common.api.IViewRule; +import com.android.ide.common.api.InsertType; +import com.android.ide.common.api.Point; +import com.android.ide.common.api.Rect; + +/** + * An {@link IViewRule} for android.widget.HorizontalScrollView. + */ +public class HorizontalScrollViewRule extends FrameLayoutRule { + + @Override + public void onChildInserted(@NonNull INode child, @NonNull INode parent, + @NonNull InsertType insertType) { + super.onChildInserted(child, parent, insertType); + + // The child of the ScrollView should fill in both directions + String fillParent = getFillParentValueName(); + child.setAttribute(ANDROID_URI, ATTR_LAYOUT_WIDTH, fillParent); + child.setAttribute(ANDROID_URI, ATTR_LAYOUT_HEIGHT, fillParent); + } + + @Override + public void onCreate(@NonNull INode node, @NonNull INode parent, + @NonNull InsertType insertType) { + super.onCreate(node, parent, insertType); + + if (insertType.isCreate()) { + // Insert a horizontal linear layout which is commonly used with horizontal scrollbars + // as described by the documentation for HorizontalScrollbars. + INode linearLayout = node.appendChild(FQCN_LINEAR_LAYOUT); + linearLayout.setAttribute(ANDROID_URI, ATTR_ORIENTATION, + VALUE_HORIZONTAL); + } + } + + @Override + public DropFeedback onDropMove(@NonNull INode targetNode, @NonNull IDragElement[] elements, + @Nullable DropFeedback feedback, @NonNull Point p) { + DropFeedback f = super.onDropMove(targetNode, elements, feedback, p); + + // HorizontalScrollViews only allow a single child + if (targetNode.getChildren().length > 0) { + f.invalidTarget = true; + } + return f; + } + + @Override + protected void drawFeedback( + IGraphics gc, + INode targetNode, + IDragElement[] elements, + DropFeedback feedback) { + if (targetNode.getChildren().length > 0) { + Rect b = targetNode.getBounds(); + if (b.isValid()) { + gc.useStyle(DrawingStyle.DROP_RECIPIENT); + gc.drawRect(b); + } + } else { + super.drawFeedback(gc, targetNode, elements, feedback); + } + } +} |