Update widget full sheet / bottom sheet to have top rounded corners.

Bug: 71775241

Change-Id: I11b5adc555f48f44cf8167e8699cae1dfe164736

res/drawable/round_rect_primary.xml

@@ -17,5 +17,5 @@
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="rectangle">
     <solid android:color="?android:attr/colorPrimary" />
-    <corners android:radius="8dp" />
+    <corners android:radius="@dimen/bg_round_rect_radius" />
 </shape>

res/drawable/top_round_rect_primary.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2018 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+
+     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.
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       android:shape="rectangle">
+    <solid android:color="?android:attr/colorPrimary" />
+    <corners
+        android:topLeftRadius="@dimen/bg_round_rect_radius"
+        android:topRightRadius="@dimen/bg_round_rect_radius"
+        android:bottomLeftRadius="0dp"
+        android:bottomRightRadius="0dp"
+        />
+</shape>

res/layout/widgets_bottom_sheet.xml

@@ -20,7 +20,7 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:paddingTop="28dp"
-    android:background="?android:attr/colorPrimary"
+    android:background="@drawable/top_round_rect_primary"
     android:elevation="@dimen/deep_shortcuts_elevation"
     android:layout_gravity="bottom"
     android:theme="?attr/widgetsTheme">

res/layout/widgets_full_sheet.xml

@@ -25,7 +25,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
-    <FrameLayout
+    <com.android.launcher3.views.TopRoundedCornerView
         android:id="@+id/container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -60,5 +60,5 @@
             android:layout_gravity="bottom"
             android:background="?attr/allAppsNavBarScrimColor"
             android:focusable="false"  />
-    </FrameLayout>
+    </com.android.launcher3.views.TopRoundedCornerView>
 </com.android.launcher3.widget.WidgetsFullSheet>

src/com/android/launcher3/views/TopRoundedCornerView.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.launcher3.views;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Path;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+import android.widget.FrameLayout;
+
+import com.android.launcher3.R;
+
+/**
+ * View with top rounded corners.
+ */
+public class TopRoundedCornerView extends FrameLayout {
+
+    private final RectF mRect = new RectF();
+    private final Path mClipPath = new Path();
+    private float[] mRadii;
+
+    public TopRoundedCornerView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+
+        int radius = getResources().getDimensionPixelSize(R.dimen.bg_round_rect_radius);
+        mRadii = new float[] {radius, radius, radius, radius, 0, 0, 0, 0};
+    }
+
+    public TopRoundedCornerView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        canvas.save();
+        canvas.clipPath(mClipPath);
+        super.draw(canvas);
+        canvas.restore();
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        mRect.set(0, 0, getMeasuredWidth(), getMeasuredHeight());
+        mClipPath.reset();
+        mClipPath.addRoundRect(mRect, mRadii, Path.Direction.CW);
+    }
+}

src/com/android/launcher3/widget/WidgetsFullSheet.java

@@ -115,6 +115,7 @@ public class WidgetsFullSheet extends BaseWidgetSheet
             mGradientView.setVisibility(View.INVISIBLE);
             widthUsed = 0;
         } else {
+            mGradientView.setVisibility(View.VISIBLE);
             Rect padding = mLauncher.getDeviceProfile().workspacePadding;
             widthUsed = Math.max(padding.left + padding.right,
                     2 * (mInsets.left + mInsets.right));