1 files changed, 91 insertions, 0 deletions
diff --git a/src/com/android/camera/ui/Arrows.java b/src/com/android/camera/ui/Arrows.java
new file mode 100644
index 000000000..4923eb10e
--- /dev/null
+++ b/src/com/android/camera/ui/Arrows.java
@@ -0,0 +1,91 @@
+/*
+Copyright (c) 2016, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of The Linux Foundation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+package com.android.camera.ui;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.util.AttributeSet;
+import android.view.View;
+
+import java.util.ArrayList;
+
+public class Arrows extends View {
+    private static final int ARROW_COLOR = Color.WHITE;
+    private static final double ARROW_END_DEGREE = 15d;
+    private static final int ARROW_END_LENGTH = 50;
+
+    private Paint mPaint;
+    private ArrayList<Path> mPaths;
+
+    public Arrows(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mPaths = new ArrayList<Path>();
+        mPaint = new Paint();
+        mPaint.setStyle(Paint.Style.STROKE);
+        mPaint.setColor(ARROW_COLOR);
+        mPaint.setStrokeWidth(2f);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+        if (mPaths != null) {
+            for(int i=0; i < mPaths.size(); i++) {
+                canvas.drawPath(mPaths.get(i), mPaint);
+            }
+        }
+    }
+
+    public void addPath(float[] x, float[] y) {
+        Path path = new Path();
+        path.reset();
+        path.moveTo(x[0], y[0]);
+        for(int i=1; i < x.length; i++) {
+            if(i == x.length-1) {
+                path.lineTo(x[i], y[i]);
+
+                double setha = Math.toDegrees(Math.atan2(y[i] - y[i - 1], x[i] - x[i - 1]));
+                setha = (setha + ARROW_END_DEGREE + 360) % 360;
+                path.lineTo(x[i]-(float)(ARROW_END_LENGTH*Math.cos(Math.toRadians(setha))),
+                            y[i]-(float)(ARROW_END_LENGTH*Math.sin(Math.toRadians(setha))));
+                path.lineTo(x[i], y[i]);
+                setha = (setha - ARROW_END_DEGREE*2 + 360) % 360;
+                path.lineTo(x[i]-(float)(ARROW_END_LENGTH*Math.cos(Math.toRadians(setha))),
+                            y[i]-(float)(ARROW_END_LENGTH*Math.sin(Math.toRadians(setha))));
+            }
+            else
+                path.quadTo(x[i],y[i], x[i+1], y[i+1]);
+        }
+        mPaths.add(path);
+        invalidate();
+    }
+}