1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.graphics.drawable.shapes;
18
19import android.graphics.Canvas;
20import android.graphics.Outline;
21import android.graphics.Paint;
22
23/**
24 * Creates an arc shape. The arc shape starts at a specified angle and sweeps
25 * clockwise, drawing slices of pie.
26 * <p>
27 * The arc can be drawn to a {@link Canvas} with its own
28 * {@link #draw(Canvas, Paint)} method, but more graphical control is available
29 * if you instead pass the ArcShape to a
30 * {@link android.graphics.drawable.ShapeDrawable}.
31 */
32public class ArcShape extends RectShape {
33    private final float mStartAngle;
34    private final float mSweepAngle;
35
36    /**
37     * ArcShape constructor.
38     *
39     * @param startAngle the angle (in degrees) where the arc begins
40     * @param sweepAngle the sweep angle (in degrees). Anything equal to or
41     *                   greater than 360 results in a complete circle/oval.
42     */
43    public ArcShape(float startAngle, float sweepAngle) {
44        mStartAngle = startAngle;
45        mSweepAngle = sweepAngle;
46    }
47
48    /**
49     * @return the angle (in degrees) where the arc begins
50     */
51    public final float getStartAngle() {
52        return mStartAngle;
53    }
54
55    /**
56     * @return the sweep angle (in degrees)
57     */
58    public final float getSweepAngle() {
59        return mSweepAngle;
60    }
61
62    @Override
63    public void draw(Canvas canvas, Paint paint) {
64        canvas.drawArc(rect(), mStartAngle, mSweepAngle, true, paint);
65    }
66
67    @Override
68    public void getOutline(Outline outline) {
69        // Since we don't support concave outlines, arc shape does not attempt
70        // to provide an outline.
71    }
72
73    @Override
74    public ArcShape clone() throws CloneNotSupportedException {
75        return (ArcShape) super.clone();
76    }
77}
78
79