1 files changed, 195 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/FrameLayoutRule.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/FrameLayoutRule.java
new file mode 100644
index 000000000..0f9096294
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/common/layout/FrameLayoutRule.java
@@ -0,0 +1,195 @@
+/*
+ * 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);
+            }
+        }
+    }
+}