Diff: src/main/java/graphing/LinePointCollection.java

Revision:

20:6d2af70c92ab

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/graphing/LinePointCollection.java	Tue Apr 06 06:41:40 2021 +0000
@@ -0,0 +1,142 @@
+/*******************************************************************************
+ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ * <p>
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * <p>
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * <p>
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ * <p>
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ * <p>
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ * ******************************************************************************
+ */
+package graphing;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Contains a list of points, the list will only hold a max number of
+ * points before the old value is deleted and new values are shifted in
+ */
+public class LinePointCollection {
+    /// list of points in this collection
+    List<LinePoint> points;
+    /// the list of points has a max count
+    int maxCount;
+    /// color used to render the points and connecting lines
+    int color;
+    /// the updated calculated max of all Y values in the list
+    float runningMaxY;
+    /// the updated calculated min of all Y values in the list
+    float runningMinY;
+
+    float pointDroppedOff;
+
+    /**
+     * Constructor used to specify the color of the line and tbe max number of points in this collection
+     * @param _color Color to use when rendering this collection
+     * @param _maxCount Max number of points held before deleting old points and "shifting" in new
+     */
+    public LinePointCollection(int _color, int _maxCount) {
+        color = _color;
+        maxCount = _maxCount;
+        points = new ArrayList<>();
+        pointDroppedOff = 0;
+    }
+
+    /**
+     * Accessor to get the list of points
+     * @return Return the list of points in this collection
+     */
+    public List<LinePoint> getPoints() {
+        return points;
+    }
+
+    public float getDroppedPointY() {
+        return pointDroppedOff;
+    }
+
+    /**
+     * Accessor to get the color of this collection
+     * @return Color that is used in this collection
+     */
+    public int getColor() {
+        return color;
+    }
+
+    /**
+     * Calculate the max and min Y extremes for the current cached points
+     */
+    private void calculateExtremes() {
+        runningMaxY = Float.MIN_VALUE;
+        runningMinY = Float.MAX_VALUE;
+        for (LinePoint point : points) {
+            if (point.y > runningMaxY) runningMaxY = point.y;
+            if (point.y < runningMinY) runningMinY = point.y;
+        }
+    }
+
+    /**
+     * Accessor to get the min Y value
+     * @return Smallest Y value in the list of points
+     */
+    public float getRunningMinY() {
+        return runningMinY;
+    }
+
+    /**
+     * Accessor to get the max Y value
+     * @return Largest Y Value in the list of points
+     */
+    public float getRunningMaxY() {
+        return runningMaxY;
+    }
+
+    /**
+     * Get the max number of points that will be contained in this collection
+     * @return Return the max count
+     */
+    public float getMaxCount() {
+        return maxCount;
+    }
+
+    /**
+     * Add a Y point value in this collection...
+     * note currently we only care about the Y value,
+     * the x running values are programically calculated
+     * @param y The Y value to use for this point
+     */
+    public void addpoint(float y) {
+        LinePoint point = new LinePoint();
+        point.x = 0;
+        point.y = y;
+        points.add(point);
+        if (points.size() > maxCount) {
+            // get the point removed for plotting first point
+            pointDroppedOff = points.get(0).rawY;
+            points.remove(0);
+        }
+        calculateExtremes();
+    }
+}