Clock Example

Original code by Christopher Oliver. Hour positions Group by Dean Iverson. See this thread in the mailing lists.

This is simple example of a clock that works in JFXPad.

Code

import javafx.ui.*;
import javafx.ui.canvas.*;
import java.util.Date;
import java.util.Math;

public class Timer {
    private attribute elapsed: Number;
    public attribute minutes: Number;
    public attribute seconds: Number;
    public attribute hours: Number;
    public attribute running: Boolean;
}

attribute Timer.elapsed = bind if running
then [1..20] dur 1000 linear
while running
continue if true
else 0;


trigger on Timer.elapsed = value {
    var now = new Date();
    minutes = now.getMinutes();
    seconds = now.getSeconds() + (now.getTime() % 1000)/1000;
    hours = now.getHours();
}


public class Clock extends CompositeNode {
    public attribute ticking: Boolean;
}

operation Clock.composeNode() {
    var t = Timer {running: bind ticking};
    return Group {
        var font = new Font("Dialog", "PLAIN", 15)
        var secs = bind t.seconds
        var mins = bind t.minutes + secs/60
        var hrs = bind t.hours + mins/60
        content:
        [Rect {
            height: 200
            width: 5000
            fill: white
        },
        Circle {cx: 100, cy: 100, radius: 80, fill: blue, stroke: black, strokeWidth: 1},
        Group {
            transform: translate( 100, 100 )
            content: foreach( i in [1..12] )
              Text {
                  var radians = Math.toRadians( 30 * i - 90 )
                  transform: [translate( 70*Math.cos( radians ), 70*Math.sin( radians ) )]
                  content: "{i}"
                  valign: MIDDLE, halign: CENTER
              }
        },
        Group {
            transform: translate(100, 100)
            var hourHand =
            Line {x1: 0, y1: 0, x2: 0, y2: -35,
                strokeWidth: 4, stroke: black
                transform: bind rotate(hrs*30, 0, 0)
            }
            var minuteHand =
            Line {x1: 0, y1: 0, x2: 0, y2: -55,
                strokeWidth: 2, stroke: black,
                transform: bind rotate(mins * 6, 0, 0)
            }

            var secondHand =
            Line {x1: 0, y1: 0, x2: 0, y2: -75,
                strokeWidth: 1, stroke: red,
                transform: bind rotate(t.seconds * 6, 0, 0)
            }

            content: [hourHand, minuteHand, secondHand]
        },
        Circle {cx: 100, cy: 100, radius: 3, fill: black, stroke: black }]
    };
}

Clock {ticking: true}

import javafx.ui.*;
import javafx.ui.canvas.*;
import java.util.Date;
import java.util.Math;

public class Timer {
    private attribute elapsed: Number;
    public attribute minutes: Number;
    public attribute seconds: Number;
    public attribute hours: Number;
    public attribute running: Boolean;
}

attribute Timer.elapsed = bind if running
then [1..20] dur 1000 linear
while running
continue if true
else 0;


trigger on Timer.elapsed = value {
    var now = new Date();
    minutes = now.getMinutes();
    seconds = now.getSeconds() + (now.getTime() % 1000)/1000;
    hours = now.getHours();
}


public class Clock extends CompositeNode {
    public attribute ticking: Boolean;
}

operation Clock.composeNode() {
    var t = Timer {running: bind ticking};
    return Group {
        var font = new Font("Dialog", "PLAIN", 15)
        var secs = bind t.seconds
        var mins = bind t.minutes + secs/60
        var hrs = bind t.hours + mins/60
        content:
        [Rect {
            height: 200
            width: 5000
            fill: white
        },
        Circle {cx: 100, cy: 100, radius: 80, fill: blue, stroke: black, strokeWidth: 1},
        Group {
            transform: translate( 100, 100 )
            content: foreach( i in [1..12] )
              Text {
                  var radians = Math.toRadians( 30 * i - 90 )
                  transform: [translate( 70*Math.cos( radians ), 70*Math.sin( radians ) )]
                  content: "{i}"
                  valign: MIDDLE, halign: CENTER
              }
        },
        Group {
            transform: translate(100, 100)
            var hourHand =
            Line {x1: 0, y1: 0, x2: 0, y2: -35,
                strokeWidth: 4, stroke: black
                transform: bind rotate(hrs*30, 0, 0)
            }
            var minuteHand =
            Line {x1: 0, y1: 0, x2: 0, y2: -55,
                strokeWidth: 2, stroke: black,
                transform: bind rotate(mins * 6, 0, 0)
            }

            var secondHand =
            Line {x1: 0, y1: 0, x2: 0, y2: -75,
                strokeWidth: 1, stroke: red,
                transform: bind rotate(t.seconds * 6, 0, 0)
            }

            content: [hourHand, minuteHand, secondHand]
        },
        Circle {cx: 100, cy: 100, radius: 3, fill: black, stroke: black }]
    };
}

Clock {ticking: true}