| /* |
| * 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_GRAVITY; |
| import static com.android.SdkConstants.ATTR_LAYOUT_HEIGHT; |
| import static com.android.SdkConstants.ATTR_LAYOUT_WIDTH; |
| |
| 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.IFeedbackPainter; |
| import com.android.ide.common.api.IGraphics; |
| import com.android.ide.common.api.INode; |
| import com.android.ide.common.api.INodeHandler; |
| import com.android.ide.common.api.IViewMetadata; |
| import com.android.ide.common.api.IViewMetadata.FillPreference; |
| 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; |
| import com.android.ide.common.api.RuleAction; |
| import com.android.utils.Pair; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * An {@link IViewRule} for android.widget.FrameLayout and all its derived |
| * classes. |
| */ |
| public class FrameLayoutRule extends BaseLayoutRule { |
| |
| // ==== Drag'n'drop support ==== |
| // The FrameLayout accepts any drag'n'drop anywhere on its surface. |
| |
| @Override |
| public DropFeedback onDropEnter(@NonNull INode targetNode, @Nullable Object targetView, |
| final @Nullable IDragElement[] elements) { |
| if (elements.length == 0) { |
| return null; |
| } |
| |
| return new DropFeedback(null, new IFeedbackPainter() { |
| @Override |
| public void paint(@NonNull IGraphics gc, @NonNull INode node, |
| @NonNull DropFeedback feedback) { |
| drawFeedback(gc, node, elements, feedback); |
| } |
| }); |
| } |
| |
| protected void drawFeedback( |
| IGraphics gc, |
| INode targetNode, |
| IDragElement[] elements, |
| DropFeedback feedback) { |
| Rect b = targetNode.getBounds(); |
| if (!b.isValid()) { |
| return; |
| } |
| |
| gc.useStyle(DrawingStyle.DROP_RECIPIENT); |
| gc.drawRect(b); |
| |
| // Get the drop point |
| Point p = (Point) feedback.userData; |
| |
| if (p == null) { |
| return; |
| } |
| |
| Rect be = elements[0].getBounds(); |
| |
| gc.useStyle(DrawingStyle.DROP_PREVIEW); |
| if (be.isValid()) { |
| // At least the first element has a bound. Draw rectangles |
| // for all dropped elements with valid bounds, offset at |
| // (0,0) |
| for (IDragElement it : elements) { |
| Rect currBounds = it.getBounds(); |
| if (currBounds.isValid()) { |
| int offsetX = b.x - currBounds.x; |
| int offsetY = b.y - currBounds.y; |
| drawElement(gc, it, offsetX, offsetY); |
| } |
| } |
| } else { |
| // We don't have bounds for new elements. In this case |
| // just draw insert lines indicating the top left corner where |
| // the item will be placed |
| |
| // +1: Place lines fully within the view (the stroke width is 2) to |
| // make |
| // it even more visually obvious |
| gc.drawLine(b.x + 1, b.y, b.x + 1, b.y + b.h); |
| gc.drawLine(b.x, b.y + 1, b.x + b.w, b.y + 1); |
| } |
| } |
| |
| @Override |
| public DropFeedback onDropMove(@NonNull INode targetNode, @NonNull IDragElement[] elements, |
| @Nullable DropFeedback feedback, @NonNull Point p) { |
| feedback.userData = p; |
| feedback.requestPaint = true; |
| return feedback; |
| } |
| |
| @Override |
| public void onDropLeave(@NonNull INode targetNode, @NonNull IDragElement[] elements, |
| @Nullable DropFeedback feedback) { |
| // ignore |
| } |
| |
| @Override |
| public void onDropped(final @NonNull INode targetNode, final @NonNull IDragElement[] elements, |
| final @Nullable DropFeedback feedback, final @NonNull Point p) { |
| Rect b = targetNode.getBounds(); |
| if (!b.isValid()) { |
| return; |
| } |
| |
| // Collect IDs from dropped elements and remap them to new IDs |
| // if this is a copy or from a different canvas. |
| final Map<String, Pair<String, String>> idMap = getDropIdMap(targetNode, elements, |
| feedback.isCopy || !feedback.sameCanvas); |
| |
| targetNode.editXml("Add elements to FrameLayout", new INodeHandler() { |
| |
| @Override |
| public void handle(@NonNull INode node) { |
| |
| // Now write the new elements. |
| for (IDragElement element : elements) { |
| String fqcn = element.getFqcn(); |
| |
| INode newChild = targetNode.appendChild(fqcn); |
| |
| // Copy all the attributes, modifying them as needed. |
| addAttributes(newChild, element, idMap, DEFAULT_ATTR_FILTER); |
| |
| addInnerElements(newChild, element, idMap); |
| } |
| } |
| }); |
| } |
| |
| @Override |
| public void addLayoutActions( |
| @NonNull List<RuleAction> actions, |
| final @NonNull INode parentNode, |
| final @NonNull List<? extends INode> children) { |
| super.addLayoutActions(actions, parentNode, children); |
| actions.add(RuleAction.createSeparator(25)); |
| actions.add(createMarginAction(parentNode, children)); |
| if (children != null && children.size() > 0) { |
| actions.add(createGravityAction(children, ATTR_LAYOUT_GRAVITY)); |
| } |
| } |
| |
| @Override |
| public void onChildInserted(@NonNull INode node, @NonNull INode parent, |
| @NonNull InsertType insertType) { |
| // Look at the fill preferences and fill embedded layouts etc |
| String fqcn = node.getFqcn(); |
| IViewMetadata metadata = mRulesEngine.getMetadata(fqcn); |
| if (metadata != null) { |
| FillPreference fill = metadata.getFillPreference(); |
| String fillParent = getFillParentValueName(); |
| if (fill.fillHorizontally(true)) { |
| node.setAttribute(ANDROID_URI, ATTR_LAYOUT_WIDTH, fillParent); |
| } |
| if (fill.fillVertically(false)) { |
| node.setAttribute(ANDROID_URI, ATTR_LAYOUT_HEIGHT, fillParent); |
| } |
| } |
| } |
| } |