Add a button that fires automatically after a given interval.

2 files changed, 126 insertions, 0 deletions

diff --git a/src/de/fhswf/in/inf/java2/aufgabe04/CountdownButtonMain.java b/src/de/fhswf/in/inf/java2/aufgabe04/CountdownButtonMain.java
new file mode 100644
index 0000000..5af329e
--- /dev/null
+++ b/src/de/fhswf/in/inf/java2/aufgabe04/CountdownButtonMain.java
@@ -0,0 +1,29 @@
+package de.fhswf.in.inf.java2.aufgabe04;
+
+import javafx.application.Application;
+import javafx.application.Platform;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+public class CountdownButtonMain extends Application
+{
+
+   @Override
+   public void start(Stage primaryStage)
+   {
+      CountdownExitButton ceb = new CountdownExitButton("Ok", 30);
+      ceb.setOnAction(e -> {
+            Platform.exit();
+         });
+      Scene scene = new Scene(ceb);
+      primaryStage.setScene(scene);
+      primaryStage.show();
+      ceb.startCountdown();
+
+   }
+
+   public static void main(String[] args)
+   {
+      launch(args);
+   }
+}
diff --git a/src/de/fhswf/in/inf/java2/aufgabe04/CountdownExitButton.java b/src/de/fhswf/in/inf/java2/aufgabe04/CountdownExitButton.java
new file mode 100644
index 0000000..b859b8f
--- /dev/null
+++ b/src/de/fhswf/in/inf/java2/aufgabe04/CountdownExitButton.java
@@ -0,0 +1,97 @@
+/**
+ * File for the CountdownExitButton class.
+ */
+
+package de.fhswf.in.inf.java2.aufgabe04;
+
+import javafx.animation.KeyFrame;
+import javafx.animation.Timeline;
+import javafx.scene.control.Button;
+import javafx.util.Duration;
+
+/**
+ * A class that fires automatically after a given interval.
+ *
+ * @author Stefan Suhren
+ * @version 1.0
+ */
+public class CountdownExitButton extends Button
+{
+
+   private int countdown = 30;
+
+   private Timeline timeline = new Timeline();
+
+   /**
+    * A Button that exits the application.
+    *
+    * @param text
+    *           The text that will be displayed
+    * @param countdown
+    *           The time in seconds till the button fires
+    */
+   public CountdownExitButton(String text, int countdown)
+   {
+      super(text);
+      setCountdown(countdown);
+
+      timeline.setCycleCount(Timeline.INDEFINITE);
+      timeline
+            .getKeyFrames()
+            .add(new KeyFrame(
+               Duration.seconds(1),
+               (e -> {
+                  CountdownExitButton.this
+                        .setText(CountdownExitButton.this
+                              .getText()
+                              .replaceFirst(
+                                    "\\("
+                                          + CountdownExitButton.this.countdown
+                                          + "\\)$",
+                                    "("
+                                          + --CountdownExitButton.this.countdown
+                                          + ")"));
+                  if (CountdownExitButton.this.countdown <= 0)
+                  {
+                     CountdownExitButton.this.fire();
+                  }
+               })));
+   }
+
+   /**
+    * Starts the countdown.
+    *
+    */
+   public void startCountdown()
+   {
+      super.setText(getText() + " (" + countdown + ")");
+      timeline.playFromStart();
+   }
+
+   /**
+    * Set the countdown.
+    *
+    * @param countdown
+    *           The time in seconds till the button fires.
+    */
+   public void setCountdown(int countdown)
+   {
+      if (countdown < 0)
+      {
+         throw new IllegalArgumentException("Countdown can't be negative.");
+      }
+      this.countdown = countdown;
+   }
+
+   /**
+    * Get the countdown.
+    *
+    * @return
+    * The countdown in seconds.
+    */
+   public int getCountdown()
+   {
+      return countdown;
+   }
+
+}