| /* |
| * Copyright (C) 2010 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.deviceinfo; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.util.AttributeSet; |
| import android.view.View; |
| |
| import com.android.settings.R; |
| |
| import java.util.Collection; |
| |
| /** |
| * Draws a horizontal bar chart with colored slices, each represented by |
| * {@link Entry}. |
| */ |
| public class PercentageBarChart extends View { |
| private final Paint mEmptyPaint = new Paint(); |
| |
| private Collection<Entry> mEntries; |
| |
| private int mMinTickWidth = 1; |
| |
| public static class Entry implements Comparable<Entry> { |
| public final int order; |
| public final float percentage; |
| public final Paint paint; |
| |
| protected Entry(int order, float percentage, Paint paint) { |
| this.order = order; |
| this.percentage = percentage; |
| this.paint = paint; |
| } |
| |
| @Override |
| public int compareTo(Entry another) { |
| return order - another.order; |
| } |
| } |
| |
| public PercentageBarChart(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PercentageBarChart); |
| mMinTickWidth = a.getDimensionPixelSize(R.styleable.PercentageBarChart_minTickWidth, 1); |
| int emptyColor = a.getColor(R.styleable.PercentageBarChart_emptyColor, Color.BLACK); |
| a.recycle(); |
| |
| mEmptyPaint.setColor(emptyColor); |
| mEmptyPaint.setStyle(Paint.Style.FILL); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| super.onDraw(canvas); |
| |
| final int left = getPaddingLeft(); |
| final int right = getWidth() - getPaddingRight(); |
| final int top = getPaddingTop(); |
| final int bottom = getHeight() - getPaddingBottom(); |
| |
| final int width = right - left; |
| |
| final boolean isLayoutRtl = isLayoutRtl(); |
| if (isLayoutRtl) { |
| float nextX = right; |
| |
| if (mEntries != null) { |
| for (final Entry e : mEntries) { |
| final float entryWidth; |
| if (e.percentage == 0.0f) { |
| entryWidth = 0.0f; |
| } else { |
| entryWidth = Math.max(mMinTickWidth, width * e.percentage); |
| } |
| |
| final float lastX = nextX - entryWidth; |
| if (lastX < left) { |
| canvas.drawRect(left, top, nextX, bottom, e.paint); |
| return; |
| } |
| |
| canvas.drawRect(lastX, top, nextX, bottom, e.paint); |
| nextX = lastX; |
| } |
| } |
| |
| canvas.drawRect(left, top, nextX, bottom, mEmptyPaint); |
| } else { |
| float lastX = left; |
| |
| if (mEntries != null) { |
| for (final Entry e : mEntries) { |
| final float entryWidth; |
| if (e.percentage == 0.0f) { |
| entryWidth = 0.0f; |
| } else { |
| entryWidth = Math.max(mMinTickWidth, width * e.percentage); |
| } |
| |
| final float nextX = lastX + entryWidth; |
| if (nextX > right) { |
| canvas.drawRect(lastX, top, right, bottom, e.paint); |
| return; |
| } |
| |
| canvas.drawRect(lastX, top, nextX, bottom, e.paint); |
| lastX = nextX; |
| } |
| } |
| |
| canvas.drawRect(lastX, top, right, bottom, mEmptyPaint); |
| } |
| } |
| |
| /** |
| * Sets the background for this chart. Callers are responsible for later |
| * calling {@link #invalidate()}. |
| */ |
| @Override |
| public void setBackgroundColor(int color) { |
| mEmptyPaint.setColor(color); |
| } |
| |
| /** |
| * Adds a new slice to the percentage bar chart. Callers are responsible for |
| * later calling {@link #invalidate()}. |
| * |
| * @param percentage the total width that |
| * @param color the color to draw the entry |
| */ |
| public static Entry createEntry(int order, float percentage, int color) { |
| final Paint p = new Paint(); |
| p.setColor(color); |
| p.setStyle(Paint.Style.FILL); |
| return new Entry(order, percentage, p); |
| } |
| |
| public void setEntries(Collection<Entry> entries) { |
| mEntries = entries; |
| } |
| } |