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/*
* Copyright (C) 2011 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.widget;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.view.View;
import com.google.common.base.Preconditions;
/**
* Background of {@link ChartView} that renders grid lines as requested by
* {@link ChartAxis#getTickPoints()}.
*/
public class ChartGridView extends View {
private final ChartAxis mHoriz;
private final ChartAxis mVert;
private final Paint mPaintHoriz;
private final Paint mPaintVert;
public ChartGridView(Context context, ChartAxis horiz, ChartAxis vert) {
super(context);
mHoriz = Preconditions.checkNotNull(horiz, "missing horiz");
mVert = Preconditions.checkNotNull(vert, "missing vert");
setWillNotDraw(false);
// TODO: convert these colors to resources
mPaintHoriz = new Paint();
mPaintHoriz.setColor(Color.parseColor("#667bb5"));
mPaintHoriz.setStrokeWidth(2.0f);
mPaintHoriz.setStyle(Style.STROKE);
mPaintHoriz.setAntiAlias(true);
mPaintVert = new Paint();
mPaintVert.setColor(Color.parseColor("#28262c"));
mPaintVert.setStrokeWidth(1.0f);
mPaintVert.setStyle(Style.STROKE);
mPaintVert.setAntiAlias(true);
}
@Override
protected void onDraw(Canvas canvas) {
final int width = getWidth();
final int height = getHeight();
final float[] vertTicks = mVert.getTickPoints();
for (float y : vertTicks) {
canvas.drawLine(0, y, width, y, mPaintVert);
}
final float[] horizTicks = mHoriz.getTickPoints();
for (float x : horizTicks) {
canvas.drawLine(x, 0, x, height, mPaintHoriz);
}
canvas.drawRect(0, 0, width, height, mPaintHoriz);
}
}
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