No more waiting around for resume

Apply model updates as son as they arrive instead of waiting for onResume.
Various workspace items do not use any configuration dependent resources.
For Widgets, we wait until the host starts lietening before inflating the actual view.

Change-Id: Icb2f5e5940c1ce6c27062ccd34eff87e80af5ab1

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

@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2017 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.widget;
+
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.text.Layout;
+import android.text.StaticLayout;
+import android.text.TextPaint;
+import android.text.TextUtils;
+import android.util.TypedValue;
+import android.widget.RemoteViews;
+
+import com.android.launcher3.R;
+
+/**
+ * A widget host views created while the host has not bind to the system service.
+ */
+public class DeferredAppWidgetHostView extends LauncherAppWidgetHostView {
+
+    private final TextPaint mPaint;
+    private Layout mSetupTextLayout;
+
+    public DeferredAppWidgetHostView(Context context) {
+        super(context);
+        setWillNotDraw(false);
+
+        mPaint = new TextPaint();
+        mPaint.setColor(Color.WHITE);
+        mPaint.setTextSize(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX,
+                mLauncher.getDeviceProfile().iconTextSizePx, getResources().getDisplayMetrics()));
+        setBackgroundResource(R.drawable.bg_deferred_app_widget);
+    }
+
+    @Override
+    public void updateAppWidget(RemoteViews remoteViews) {
+        // Not allowed
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        AppWidgetProviderInfo info = getAppWidgetInfo();
+        if (info == null || TextUtils.isEmpty(info.label)) {
+            return;
+        }
+
+        // Use double padding so that there is extra space between background and text
+        int availableWidth = getMeasuredWidth() - 2 * (getPaddingLeft() + getPaddingRight());
+        if (mSetupTextLayout != null && mSetupTextLayout.getText().equals(info.label)
+                && mSetupTextLayout.getWidth() == availableWidth) {
+            return;
+        }
+        mSetupTextLayout = new StaticLayout(info.label, mPaint, availableWidth,
+                Layout.Alignment.ALIGN_CENTER, 1, 0, true);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        if (mSetupTextLayout != null) {
+            canvas.translate(getPaddingLeft() * 2,
+                    (getHeight() - mSetupTextLayout.getHeight()) / 2);
+            mSetupTextLayout.draw(canvas);
+        }
+    }
+}