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janphkrejanphkre
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‎aima-gui/src/main/java/aima/gui/fx/views/FunctionPlotterCtrl.java‎

Lines changed: 98 additions & 98 deletions
Original file line numberDiff line numberDiff line change
@@ -1,98 +1,98 @@
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package aima.gui.fx.views;
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import java.util.Optional;
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import java.util.function.Function;
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import javafx.scene.canvas.Canvas;
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import javafx.scene.canvas.GraphicsContext;
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import javafx.scene.paint.Color;
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import javafx.scene.paint.Paint;
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/**
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* Controller class which provides functionality for using a canvas as function
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* plotter.
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*
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* @author Ruediger Lunde
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*/
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public class FunctionPlotterCtrl {
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private Canvas canvas;
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private Optional<Function<Double, Double>> function = Optional.empty();
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private double minX;
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private double maxX = 1;
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private double minY;
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private double maxY = 1;
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public FunctionPlotterCtrl(Canvas canvas) {
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this.canvas = canvas;
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canvas.widthProperty().addListener((obs, o, n) -> update());
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canvas.heightProperty().addListener((obs, o, n) -> update());
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}
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public Optional<Function<Double, Double>> getFunction() {
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return function;
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}
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public void setFunction(Function<Double, Double> function) {
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this.function = Optional.of(function);
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update();
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}
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public void setLimits(double minX, double maxX, double minY, double maxY) {
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this.minX = minX;
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this.minY = minY;
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this.maxX = maxX;
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this.maxY = maxY;
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}
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public void update() {
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GraphicsContext gc = canvas.getGraphicsContext2D();
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gc.clearRect(0, 0, canvas.getWidth(), canvas.getHeight());
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gc.setStroke(Color.GRAY);
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gc.strokeLine(0.01 * canvas.getWidth(), yToScreen(0), canvas.getWidth() * 0.99, yToScreen(0));
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gc.strokeLine(xToScreen(0), 0.01 * canvas.getHeight(), xToScreen(0), 0.99 * canvas.getHeight());
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gc.strokeLine(xToScreen(1), yToScreen(0) - 5, xToScreen(1), yToScreen(0) + 5);
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gc.strokeLine(xToScreen(0) - 5, yToScreen(1), xToScreen(0) + 5, yToScreen(1));
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if (function.isPresent()) {
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gc.setStroke(Color.BLACK);
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double lastVal = function.get().apply(minX);
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for (int i = 1; i < canvas.getWidth(); i++) {
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double newVal = function.get().apply(screenToX(i));
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gc.strokeLine(i - 1, yToScreen(lastVal), i, yToScreen(newVal));
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lastVal = newVal;
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}
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}
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}
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public void setMarker(double x, Optional<Paint> fill) {
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if (function.isPresent()) {
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double y = function.get().apply(x);
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GraphicsContext gc = canvas.getGraphicsContext2D();
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gc.setStroke(Color.RED);
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if (fill.isPresent()) {
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gc.setFill(fill.get());
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gc.fillOval(xToScreen(x) - 10, yToScreen(y) - 10, 20, 20);
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} else
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gc.strokeOval(xToScreen(x) - 10, yToScreen(y) - 10, 20, 20);
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}
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}
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/* Returns pixel width. */
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public double getDeltaX() {
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return (maxX - minX) / canvas.getWidth();
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}
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private double yToScreen(double y) {
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return (1.1 - (y - minY) / (maxY - minY)) * canvas.getHeight() * 0.8;
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}
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private double screenToX(double xScreen) {
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return xScreen / canvas.getWidth() * (maxX - minX) + minX;
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}
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private double xToScreen(double x) {
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return (x - minX) * canvas.getWidth() / (maxX - minX);
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}
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}
1+
package aima.gui.fx.views;
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import java.util.Optional;
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import java.util.function.Function;
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import javafx.scene.canvas.Canvas;
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import javafx.scene.canvas.GraphicsContext;
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import javafx.scene.paint.Color;
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import javafx.scene.paint.Paint;
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/**
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* Controller class which provides functionality for using a canvas as function
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* plotter.
14+
*
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* @author Ruediger Lunde
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*/
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public class FunctionPlotterCtrl {
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private Canvas canvas;
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private Optional<Function<Double, Double>> function = Optional.empty();
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private double minX;
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private double maxX = 1;
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private double minY;
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private double maxY = 1;
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public FunctionPlotterCtrl(Canvas canvas) {
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this.canvas = canvas;
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canvas.widthProperty().addListener((obs, o, n) -> update());
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canvas.heightProperty().addListener((obs, o, n) -> update());
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}
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public Optional<Function<Double, Double>> getFunction() {
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return function;
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}
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public void setFunction(Function<Double, Double> function) {
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this.function = Optional.of(function);
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update();
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}
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public void setLimits(double minX, double maxX, double minY, double maxY) {
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this.minX = minX;
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this.minY = minY;
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this.maxX = maxX;
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this.maxY = maxY;
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}
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public void update() {
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GraphicsContext gc = canvas.getGraphicsContext2D();
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gc.clearRect(0, 0, canvas.getWidth(), canvas.getHeight());
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gc.setStroke(Color.GRAY);
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gc.strokeLine(0.01 * canvas.getWidth(), yToScreen(0), canvas.getWidth() * 0.99, yToScreen(0));
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gc.strokeLine(xToScreen(0), 0.01 * canvas.getHeight(), xToScreen(0), 0.99 * canvas.getHeight());
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gc.strokeLine(xToScreen(1), yToScreen(0) - 5, xToScreen(1), yToScreen(0) + 5);
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gc.strokeLine(xToScreen(0) - 5, yToScreen(1), xToScreen(0) + 5, yToScreen(1));
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if (function.isPresent()) {
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gc.setStroke(Color.BLACK);
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double lastVal = function.get().apply(minX);
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for (int i = 1; i < canvas.getWidth(); i++) {
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double newVal = function.get().apply(screenToX(i));
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gc.strokeLine(i - 1, yToScreen(lastVal), i, yToScreen(newVal));
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lastVal = newVal;
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}
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}
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}
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public void setMarker(double x, Optional<Paint> fill) {
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if (function.isPresent()) {
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double y = function.get().apply(x);
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GraphicsContext gc = canvas.getGraphicsContext2D();
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gc.setStroke(Color.RED);
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if (fill.isPresent()) {
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gc.setFill(fill.get());
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gc.fillOval(xToScreen(x) - 10, yToScreen(y) - 10, 20, 20);
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} else
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gc.strokeOval(xToScreen(x) - 10, yToScreen(y) - 10, 20, 20);
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}
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}
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/* Returns pixel width. */
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public double getDeltaX() {
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return (maxX - minX) / canvas.getWidth();
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}
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private double yToScreen(double y) {
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return (1.1 - (y - minY) / (maxY - minY)) * canvas.getHeight() * 0.8;
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}
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private double screenToX(double xScreen) {
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return xScreen / canvas.getWidth() * (maxX - minX) + minX;
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}
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private double xToScreen(double x) {
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return (x - minX) * canvas.getWidth() / (maxX - minX);
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}
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}

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