| // 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.google.reviewit; |
| |
| import android.graphics.Canvas; |
| import android.graphics.ColorFilter; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.graphics.drawable.Drawable; |
| |
| /** |
| * Drawable for semi circles. |
| */ |
| public class SemiCircleDrawable extends Drawable { |
| public enum Direction { |
| LEFT, |
| RIGHT, |
| TOP, |
| BOTTOM |
| } |
| |
| private Direction angle; |
| private int color; |
| private int borderColor; |
| private Paint paint; |
| private RectF rectF; |
| |
| public SemiCircleDrawable(Direction angle, int color, int borderColor) { |
| this.angle = angle; |
| this.color = color; |
| this.borderColor = borderColor; |
| this.paint = new Paint(); |
| this.rectF = new RectF(); |
| } |
| |
| @Override |
| public void draw(Canvas canvas) { |
| canvas.save(); |
| |
| Rect bounds = getBounds(); |
| if (angle == Direction.LEFT || angle == Direction.RIGHT) { |
| canvas.scale(2, 1); |
| if (angle == Direction.RIGHT) { |
| canvas.translate(-(bounds.right / 2), 0); |
| } |
| } else { |
| canvas.scale(1, 2); |
| if (angle == Direction.BOTTOM) { |
| canvas.translate(0, -(bounds.bottom / 2)); |
| } |
| } |
| |
| rectF.set(bounds); |
| drawArc(canvas, color, Paint.Style.FILL); |
| drawArc(canvas, borderColor, Paint.Style.STROKE); |
| } |
| |
| private void drawArc(Canvas canvas, int color, Paint.Style style) { |
| paint.setColor(color); |
| paint.setStyle(style); |
| if (angle == Direction.LEFT) { |
| canvas.drawArc(rectF, 90, 180, true, paint); |
| } else if (angle == Direction.TOP) { |
| canvas.drawArc(rectF, -180, 180, true, paint); |
| } else if (angle == Direction.RIGHT) { |
| canvas.drawArc(rectF, 270, 180, true, paint); |
| } else if (angle == Direction.BOTTOM) { |
| canvas.drawArc(rectF, 0, 180, true, paint); |
| } |
| } |
| |
| @Override |
| public void setAlpha(int alpha) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void setColorFilter(ColorFilter cf) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int getOpacity() { |
| return 0; |
| } |
| } |