10 Oct 2011 03:43
Anybody playing with JavaFX + Jython
Jose Vicente Nunez Zuleta <josevnz <at> yahoo.com>
2011-10-10 01:43:07 GMT
2011-10-10 01:43:07 GMT
Hello to all,
Playin with JavaFX + Jython and tried to convert the code that appears on the following location: http://download.oracle.com/javafx/2.0/charts/pie-chart.htm#CIHFDADD
So far the original Java code works well but the following Jython script:
#!/usr/bin/env jython
import sys
from javafx.application import Application
from javafx.collections import FXCollections
from javafx.collections import ObservableList
from javafx.scene import Scene
from javafx.stage import Stage
from javafx.scene.chart import PieChart
from javafx.scene import Group
class PieChartSample(Application):
def __init__(self):
pass
def start(self, stage):
scene = Scene(Group())
stage.setTitle("Imported Fruits")
stage.setWidth(500)
stage.setHeight(500)
pieChartData = FXCollections.observableArrayList(
PieChart.Data("Grapefruit", 13),
PieChart.Data("Oranges", 25),
PieChart.Data("Plums", 10),
PieChart.Data("Pears", 22),
PieChart.Data("Apples", 30))
chart = PieChart(pieChartData)
chart.setTitle("Imported Fruits")
scene.getRoot().getChildren().add(chart)
stage.setScene(scene)
stage.show()
if __name__ == "__main__":
PieChartSample().launch(sys.argv[1:])
import sys
from javafx.application import Application
from javafx.collections import FXCollections
from javafx.collections import ObservableList
from javafx.scene import Scene
from javafx.stage import Stage
from javafx.scene.chart import PieChart
from javafx.scene import Group
class PieChartSample(Application):
def __init__(self):
pass
def start(self, stage):
scene = Scene(Group())
stage.setTitle("Imported Fruits")
stage.setWidth(500)
stage.setHeight(500)
pieChartData = FXCollections.observableArrayList(
PieChart.Data("Grapefruit", 13),
PieChart.Data("Oranges", 25),
PieChart.Data("Plums", 10),
PieChart.Data("Pears", 22),
PieChart.Data("Apples", 30))
chart = PieChart(pieChartData)
chart.setTitle("Imported Fruits")
scene.getRoot().getChildren().add(chart)
stage.setScene(scene)
stage.show()
if __name__ == "__main__":
PieChartSample().launch(sys.argv[1:])
Gives me the following exception:
./piechart.py *sys-package-mgr*: can't create package cache dir, '/Users/Shared/jython2.5.2/cachedir/packages'
Traceback (most recent call last):
File "./piechart.py", line 36, in <module>
PieChartSample().launch(sys.argv[1:])
at javafx.application.Application.launch(Application.java:186)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
java.lang.RuntimeException: java.lang.RuntimeException: Error: class sun.reflect.NativeMethodAccessorImpl is not a subclass of javafx.application.Application
Traceback (most recent call last):
File "./piechart.py", line 36, in <module>
PieChartSample().launch(sys.argv[1:])
at javafx.application.Application.launch(Application.java:186)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
java.lang.RuntimeException: java.lang.RuntimeException: Error: class sun.reflect.NativeMethodAccessorImpl is not a subclass of javafx.application.Application
Does anybody had a similar issue while trying to create JavaFX applications using Jython? Somehow Jython doesn't think I overrode the start method on my class.
Thanks in
advance,
--José
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. Can you explain what you mean by a 'simple' object? The stage variable id of type 'Stage' and my understanding is than the JVM keeps track of the type for you. Also there is only one abstract method called start in the Java class, so I don't think is an overriding issue with Jython.
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