commit Exercise_30_07

csv77 · csv77 · commit f6bb66d98634 · 2017-09-30T18:28:17.000+02:00
diff --git a/Chapter_30/exercise_30_07/ClockPane.java b/Chapter_30/exercise_30_07/ClockPane.java
@@ -0,0 +1,96 @@
+package exercise_30_07;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import javafx.application.Platform;
+import javafx.scene.layout.Pane;
+import javafx.scene.paint.Color;
+import javafx.scene.shape.Circle;
+import javafx.scene.shape.Line;
+import javafx.scene.text.Text;
+
+public class ClockPane extends Pane {
+    private int hour;
+    private int minute;
+    private int second;
+    private double w = 250, h = 250;
+    private int sleepTime = 10;
+    private Thread thread = new Thread(() -> {
+        try {
+            while(true) {
+                Platform.runLater(() -> setCurrentTime());
+                Thread.sleep(sleepTime);
+            }
+        }
+        catch (InterruptedException e) {
+        }
+    });
+    
+    public ClockPane() {
+        setCurrentTime();
+        thread.start();
+    }
+
+    public ClockPane(int hour, int minute, int second) {
+        this.hour = hour;
+        this.minute = minute;
+        this.second = second;
+        paintClock();
+        thread.start();
+    }
+
+    public void setCurrentTime() {
+        Calendar calendar = new GregorianCalendar();
+        this.hour = calendar.get(Calendar.HOUR_OF_DAY);
+        this.minute = calendar.get(Calendar.MINUTE);
+        this.second = calendar.get(Calendar.SECOND);
+        paintClock();
+    }
+
+    protected void paintClock() {
+        double clockRadius = Math.min(w, h) * 0.8 * 0.5;
+        double centerX = w / 2;
+        double centerY = h / 2;
+
+        Circle circle = new Circle(centerX, centerY, clockRadius);
+        circle.setFill(Color.WHITE);
+        circle.setStroke(Color.BLACK);
+        Text t1 = new Text(centerX - 5, centerY - clockRadius + 12, "12");
+        Text t2 = new Text(centerX - clockRadius + 3, centerY + 5, "9");
+        Text t3 = new Text(centerX + clockRadius - 10, centerY + 3, "3");
+        Text t4 = new Text(centerX - 3, centerY + clockRadius - 3, "6");
+
+        double sLength = clockRadius * 0.8;
+        double secondX = centerX + sLength * Math.sin(second * (2 * Math.PI / 60));
+        double secondY = centerY - sLength * Math.cos(second * (2 * Math.PI / 60));
+        Line sLine = new Line(centerX, centerY, secondX, secondY);
+        sLine.setStroke(Color.RED);
+
+        double mLength = clockRadius * 0.65;
+        double minuteX = centerX + mLength * Math.sin(minute * (2 * Math.PI / 60));
+        double minuteY = centerY - mLength * Math.cos(minute * (2 * Math.PI / 60));
+        Line mLine = new Line(centerX, centerY, minuteX, minuteY);
+        mLine.setStroke(Color.BLUE);
+
+        double hLength = clockRadius * 0.5;
+        double hourX = centerX + hLength * Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12));
+        double hourY = centerY - hLength * Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12));
+        Line hLine = new Line(centerX, centerY, hourX, hourY);
+        hLine.setStroke(Color.GREEN);
+
+        getChildren().clear();
+        getChildren().addAll(circle, t1, t2, t3, t4, sLine, mLine, hLine);
+    }
+    
+    public void moveClock() {
+        setCurrentTime();
+    }
+    
+    public void resume() {
+        thread.resume();
+    }
+    
+    public void suspend() {
+        thread.suspend();
+    }
+}
diff --git a/Chapter_30/exercise_30_07/Exercise_30_07.java b/Chapter_30/exercise_30_07/Exercise_30_07.java
@@ -0,0 +1,39 @@
+package exercise_30_07;
+
+import javafx.application.Application;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.HBox;
+import javafx.stage.Stage;
+
+public class Exercise_30_07 extends Application {
+
+    @Override
+    public void start(Stage primaryStage) {
+        ClockPane clockPane = new ClockPane();
+        
+        HBox hBox = new HBox(5);
+        hBox.setAlignment(Pos.CENTER);
+        Button stop = new Button("Stop");
+        Button start = new Button("Start");
+        hBox.getChildren().addAll(stop, start);
+        
+        BorderPane pane = new BorderPane(clockPane);
+        pane.setBottom(hBox);
+        
+        Scene scene = new Scene(pane, 250, 270);
+        primaryStage.setTitle("Exercise_30_07");
+        primaryStage.setScene(scene);
+        primaryStage.show();
+        
+        stop.setOnAction(e -> clockPane.suspend());
+        start.setOnAction(e -> clockPane.resume());
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+
+}
