Move UsageGraph from SettingsLib to Settings.

In preparation for modifying the graph code to show detailed projections
(see bug), this change moves it into Settings along with related tests
and resources.

Bug: 38400320
Test: manual, make SettingsUnitTests, make SettingsGoogleUnitTests
Change-Id: I88e5336c15827727b3427e29b10954bba9cfba7d

src/com/android/settings/graph/UsageView.java

@@ -0,0 +1,141 @@
+/*
+ * 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.
+ */
+
+package com.android.settings.graph;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.util.SparseIntArray;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import com.android.settingslib.R;
+
+public class UsageView extends FrameLayout {
+
+    private final UsageGraph mUsageGraph;
+    private final TextView[] mLabels;
+    private final TextView[] mBottomLabels;
+
+    public UsageView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        LayoutInflater.from(context).inflate(R.layout.usage_view, this);
+        mUsageGraph = findViewById(R.id.usage_graph);
+        mLabels = new TextView[] {
+                findViewById(R.id.label_bottom),
+                findViewById(R.id.label_middle),
+                findViewById(R.id.label_top),
+        };
+        mBottomLabels = new TextView[] {
+                findViewById(R.id.label_start),
+                findViewById(R.id.label_end),
+        };
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.UsageView, 0, 0);
+        if (a.hasValue(R.styleable.UsageView_sideLabels)) {
+            setSideLabels(a.getTextArray(R.styleable.UsageView_sideLabels));
+        }
+        if (a.hasValue(R.styleable.UsageView_bottomLabels)) {
+            setBottomLabels(a.getTextArray(R.styleable.UsageView_bottomLabels));
+        }
+        if (a.hasValue(R.styleable.UsageView_textColor)) {
+            int color = a.getColor(R.styleable.UsageView_textColor, 0);
+            for (TextView v : mLabels) {
+                v.setTextColor(color);
+            }
+            for (TextView v : mBottomLabels) {
+                v.setTextColor(color);
+            }
+        }
+        if (a.hasValue(R.styleable.UsageView_android_gravity)) {
+            int gravity = a.getInt(R.styleable.UsageView_android_gravity, 0);
+            if (gravity == Gravity.END) {
+                LinearLayout layout = findViewById(R.id.graph_label_group);
+                LinearLayout labels = findViewById(R.id.label_group);
+                // Swap the children order.
+                layout.removeView(labels);
+                layout.addView(labels);
+                // Set gravity.
+                labels.setGravity(Gravity.END);
+                // Swap the bottom space order.
+                LinearLayout bottomLabels = findViewById(R.id.bottom_label_group);
+                View bottomSpace = bottomLabels.findViewById(R.id.bottom_label_space);
+                bottomLabels.removeView(bottomSpace);
+                bottomLabels.addView(bottomSpace);
+            } else if (gravity != Gravity.START) {
+                throw new IllegalArgumentException("Unsupported gravity " + gravity);
+            }
+        }
+        mUsageGraph.setAccentColor(a.getColor(R.styleable.UsageView_android_colorAccent, 0));
+    }
+
+    public void clearPaths() {
+        mUsageGraph.clearPaths();
+    }
+
+    public void addPath(SparseIntArray points) {
+        mUsageGraph.addPath(points);
+    }
+
+    public void configureGraph(int maxX, int maxY, boolean showProjection, boolean projectUp) {
+        mUsageGraph.setMax(maxX, maxY);
+        mUsageGraph.setShowProjection(showProjection, projectUp);
+    }
+
+    public void setAccentColor(int color) {
+        mUsageGraph.setAccentColor(color);
+    }
+
+    public void setDividerLoc(int dividerLoc) {
+        mUsageGraph.setDividerLoc(dividerLoc);
+    }
+
+    public void setDividerColors(int middleColor, int topColor) {
+        mUsageGraph.setDividerColors(middleColor, topColor);
+    }
+
+    public void setSideLabelWeights(float before, float after) {
+        setWeight(R.id.space1, before);
+        setWeight(R.id.space2, after);
+    }
+
+    private void setWeight(int id, float weight) {
+        View v = findViewById(id);
+        LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) v.getLayoutParams();
+        params.weight = weight;
+        v.setLayoutParams(params);
+    }
+
+    public void setSideLabels(CharSequence[] labels) {
+        if (labels.length != mLabels.length) {
+            throw new IllegalArgumentException("Invalid number of labels");
+        }
+        for (int i = 0; i < mLabels.length; i++) {
+            mLabels[i].setText(labels[i]);
+        }
+    }
+
+    public void setBottomLabels(CharSequence[] labels) {
+        if (labels.length != mBottomLabels.length) {
+            throw new IllegalArgumentException("Invalid number of labels");
+        }
+        for (int i = 0; i < mBottomLabels.length; i++) {
+            mBottomLabels[i].setText(labels[i]);
+        }
+    }
+
+}