Refactor setup wizard-related code

Extracted setup-related code from WifiSettings, putting it into a new
derived class, WifiSettingsForSetupWizard.

Set taskAffinity to com.android.wizard, for alignment with other
setup wizard-related tasks.

Change-Id: If371f219dac5d3eff8f7899c16cc6f9475be47cf

src/com/android/settings/widget/ProportionalOuterFrame.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2011 Google Inc.
+ *
+ * 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.settings.widget;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.RelativeLayout;
+
+import com.android.settings.R;
+
+/**
+ * Used as the outer frame of all setup wizard pages that need to adjust their margins based
+ * on the total size of the available display. (e.g. side margins set to 10% of total width.)
+ */
+public class ProportionalOuterFrame extends RelativeLayout {
+    public ProportionalOuterFrame(Context context) {
+        super(context);
+    }
+
+    public ProportionalOuterFrame(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ProportionalOuterFrame(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    /**
+     * Set our margins and title area height proportionally to the available display size
+     */
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        final int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
+        final int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
+        final Resources res = getContext().getResources();
+        final float titleHeight = res.getFraction(R.dimen.setup_title_height, 1, 1);
+        final float sideMargin = res.getFraction(R.dimen.setup_border_width, 1, 1);
+        final int bottom = res.getDimensionPixelSize(R.dimen.setup_margin_bottom);
+        setPaddingRelative((int) (parentWidth * sideMargin), 0,
+                (int) (parentWidth * sideMargin), bottom);
+        final View title = findViewById(R.id.title_area);
+        if (title != null) {
+            title.setMinimumHeight((int) (parentHeight * titleHeight));
+        }
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+    }
+}