Merge "Move UsageGraph from SettingsLib to Settings."

<!--

    Copyright (C) 2016 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.

-->

<TextView

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:textAppearance="?android:attr/textAppearanceSmall" />

<!--

    Copyright (C) 2016 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.

-->

<TextView

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:textAppearance="?android:attr/textAppearanceSmall" />

<!--

    Copyright (C) 2016 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.

-->

<LinearLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:orientation="vertical">

    <LinearLayout

        android:id="@+id/graph_label_group"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1"

        android:orientation="horizontal"

        android:clipChildren="false"

        android:clipToPadding="false">

        <LinearLayout

            android:id="@+id/label_group"

            android:layout_width="@dimen/usage_graph_labels_width"

            android:layout_height="match_parent"

            android:orientation="vertical">

            <include android:id="@+id/label_top"

                layout="@layout/usage_side_label" />

            <Space

                android:id="@+id/space1"

                android:layout_width="wrap_content"

                android:layout_height="0dp"

                android:layout_weight="1" />

            <include android:id="@+id/label_middle"

                layout="@layout/usage_side_label" />

            <Space

                android:id="@+id/space2"

                android:layout_width="wrap_content"

                android:layout_height="0dp"

                android:layout_weight="1" />

            <include android:id="@+id/label_bottom"

                layout="@layout/usage_side_label" />

        </LinearLayout>

        <com.android.settingslib.graph.UsageGraph

            android:id="@+id/usage_graph"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:layout_weight="1"

            android:layout_marginTop="@dimen/usage_graph_margin_top_bottom"

            android:layout_marginBottom="@dimen/usage_graph_margin_top_bottom" />

    </LinearLayout>

    <LinearLayout

        android:id="@+id/bottom_label_group"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal">

        <Space

            android:id="@+id/bottom_label_space"

            android:layout_width="@dimen/usage_graph_labels_width"

            android:layout_height="wrap_content"/>

        <com.android.settingslib.graph.BottomLabelLayout

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:orientation="horizontal"

            android:layoutDirection="ltr">

            <include android:id="@+id/label_start"

                     layout="@layout/usage_side_label" />

            <Space

                android:id="@+id/spacer"

                android:layout_width="40dp"

                android:layout_height="wrap_content"

                android:layout_weight="1" />

            <include android:id="@+id/label_end"

                     layout="@layout/usage_side_label" />

        </com.android.settingslib.graph.BottomLabelLayout>

    </LinearLayout>

</LinearLayout>

    <attr name="wifi_signal" format="reference" />

    <attr name="wifi_friction" format="reference" />

    <declare-styleable name="UsageView">

        <attr name="android:colorAccent" />

        <attr name="sideLabels" format="reference" />

        <attr name="bottomLabels" format="reference" />

        <attr name="textColor" format="color" />

        <attr name="android:gravity" />

    </declare-styleable>

    <attr name="footerPreferenceStyle" format="reference" />

</resources>

/*

 * 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.settingslib.graph;

import android.annotation.Nullable;

import android.content.Context;

import android.support.annotation.VisibleForTesting;

import android.util.AttributeSet;

import android.view.Gravity;

import android.view.View;

import android.widget.LinearLayout;

import com.android.settingslib.R;

/**

 * An extension of LinearLayout that automatically switches to vertical

 * orientation when it can't fit its child views horizontally.

 *

 * Main logic in this class comes from {@link android.support.v7.widget.ButtonBarLayout}.

 * Compared with {@link android.support.v7.widget.ButtonBarLayout}, this layout won't reverse

 * children's order and won't update the minimum height

 */

public class BottomLabelLayout extends LinearLayout {

    private static final String TAG = "BottomLabelLayout";

    public BottomLabelLayout(Context context,

            @Nullable AttributeSet attrs) {

        super(context, attrs);

    }

    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        final int widthSize = MeasureSpec.getSize(widthMeasureSpec);

        final boolean isStacked = isStacked();

        boolean needsRemeasure = false;

        // If we're not stacked, make sure the measure spec is AT_MOST rather

        // than EXACTLY. This ensures that we'll still get TOO_SMALL so that we

        // know to stack the buttons.

        final int initialWidthMeasureSpec;

        if (!isStacked && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY) {

            initialWidthMeasureSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.AT_MOST);

            // We'll need to remeasure again to fill excess space.

            needsRemeasure = true;

        } else {

            initialWidthMeasureSpec = widthMeasureSpec;

        }

        super.onMeasure(initialWidthMeasureSpec, heightMeasureSpec);

        if (!isStacked) {

            final int measuredWidth = getMeasuredWidthAndState();

            final int measuredWidthState = measuredWidth & View.MEASURED_STATE_MASK;

            if (measuredWidthState == View.MEASURED_STATE_TOO_SMALL) {

                setStacked(true);

                // Measure again in the new orientation.

                needsRemeasure = true;

            }

        }

        if (needsRemeasure) {

            super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        }

    }

    @VisibleForTesting

    void setStacked(boolean stacked) {

        setOrientation(stacked ? LinearLayout.VERTICAL : LinearLayout.HORIZONTAL);

        setGravity(stacked ? Gravity.START : Gravity.BOTTOM);

        final View spacer = findViewById(R.id.spacer);

        if (spacer != null) {

            spacer.setVisibility(stacked ? View.GONE : View.VISIBLE);

        }

    }

    private boolean isStacked() {

        return getOrientation() == LinearLayout.VERTICAL;

    }

}