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| #format wiki #language en #pragma section-numbers off = Swing Sampler = SwingExamples <<TableOfContents>> ---- Stored here for posterity's sake it was found on http://hcc.cc.gatech.edu/documents/230_Edwards_swing-sampler.py and the nature of the web being what it is who knows how long it would be there or if I could find it again. This is exactly as I found it. I have verified that it works with Jython 2.2 with Java JVM 1.5 & 1.6 and based on the code I suspect it would work with a 1.4.2 JVM {{{ # # This code shows a sampler of common Java Swing widget types. This is # by no means all of the available widgets. For documentation and tutorials # on the underlying Java classes, see http://java.sun.com/products/jfc/ # # # We'll be using swing a lot, so import it as "swing". Swing is built using # an older Java GUI toolkit called awt, so we'll need it too. One of the # examples here also uses the Java networking package (you're unlikely to # need that for the project...) # import javax.swing as swing import java.awt as awt import java.net as net import sys # # I've organized the sampler code into a single class, called SwingSampler. # The __init__ function (called the "constructor") does all of the setup. # Note that __init__, like all other functions in a class (called "methods") # takes "self" as its first argument. # class SwingSampler: def __init__(self): ######################################################### # # set up the overall frame (the window itself) # self.window = swing.JFrame("Swing Sampler!") self.window.windowClosing = self.goodbye self.window.contentPane.layout = awt.BorderLayout() ######################################################### # # under this will be a tabbed pane; each tab is named # and contains a panel with other stuff in it. # tabbedPane = swing.JTabbedPane() self.window.contentPane.add("Center", tabbedPane); ######################################################### # # The first tabbed panel will be named "Some Basic # Widgets", and is referenced by variable 'firstTab' # firstTab = swing.JPanel() firstTab.layout = awt.BorderLayout() tabbedPane.addTab("Some Basic Widgets", firstTab) # # slap in some labels, a list, a text field, etc... Some # of these are contained in their own panels for # layout purposes. # tmpPanel = swing.JPanel() tmpPanel.layout = awt.GridLayout(3, 1) tmpPanel.border = swing.BorderFactory.createTitledBorder("Labels are simple") tmpPanel.add(swing.JLabel("I am a label. I am quite boring.")) tmpPanel.add(swing.JLabel("<HTML><FONT COLOR='blue'>HTML <B>labels</B> </FONT> are <I>somewhat</I><U>less boring</U>.</HTML>")) tmpPanel.add(swing.JLabel("Labels can also be aligned", swing.JLabel.RIGHT)) firstTab.add(tmpPanel, "North") # # Notice that the variable "tmpPanel" gets reused here. # This next line creates a new panel, but we reuse the # "tmpPanel" name to refer to it. The panel that # tmpPanel used to refer to still exists, but we no # longer have a way to name it (but that's ok, since # we don't need to refer to it any more). # tmpPanel = swing.JPanel() tmpPanel.layout = awt.BorderLayout() tmpPanel.border = swing.BorderFactory.createTitledBorder("Tasty tasty lists") # # Note that here we stash a reference to the list in # "self.list". This puts it in the scope of the object, # rather than this function. This is because we'll be # referring to it later from outside this function, so # it needs to be "bumped up a level." # self.listData = ( "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ) self.list = swing.JList(self.listData) tmpPanel.add("Center", swing.JScrollPane(self.list)) button = swing.JButton("What's Selected?") button.actionPerformed = self.whatsSelectedCallback; tmpPanel.add("East", button) firstTab.add("Center", tmpPanel) tmpPanel = swing.JPanel() tmpPanel.layout = awt.BorderLayout() # # The text field also goes in self, since the callback # that displays the contents will need to get at it. # # Also note that because the callback is a function inside # the SwingSampler object, you refer to it through self. # (The callback could potentially be outside the object, # as a top-level function. In that case you wouldn't # use the 'self' selector; any variables that it uses # would have to be in the global scope. # self.field = swing.JTextField() tmpPanel.add(self.field) tmpPanel.add(swing.JButton("Click Me", actionPerformed=self.clickMeCallback), "East") firstTab.add(tmpPanel, "South") ######################################################### # # The second tabbed panel is next... This shows # how to build a basic web browser in about 20 lines. # secondTab = swing.JPanel() secondTab.layout = awt.BorderLayout() tabbedPane.addTab("HTML Fanciness", secondTab) tmpPanel = swing.JPanel() tmpPanel.add(swing.JLabel("Go to:")) self.urlField = swing.JTextField(40, actionPerformed=self.goToCallback) tmpPanel.add(self.urlField) tmpPanel.add(swing.JButton("Go!", actionPerformed=self.goToCallback)) secondTab.add(tmpPanel, "North") #self.htmlPane = swing.JEditorPane("http://www.cc.gatech.edu", editable=0, hyperlinkUpdate=self.followHyperlink, preferredSize=(400, 400)) self.htmlPane = swing.JEditorPane("http://www.jython.org", editable=0, hyperlinkUpdate=self.followHyperlink, preferredSize=(400, 400)) secondTab.add(swing.JScrollPane(self.htmlPane), "Center") self.statusLine = swing.JLabel("") ######################################################### # # The third tabbed panel is next... # thirdTab = swing.JPanel() tabbedPane.addTab("Other Widgets", thirdTab) imageLabel = swing.JLabel(swing.ImageIcon(net.URL("http://www.gatech.edu/images/logo-gatech.gif"))) imageLabel.toolTipText = "Labels can have images! Every widget can have a tooltip!" thirdTab.add(imageLabel) tmpPanel = swing.JPanel() tmpPanel.layout = awt.GridLayout(3, 2) tmpPanel.border = swing.BorderFactory.createTitledBorder("Travel Checklist") tmpPanel.add(swing.JCheckBox("Umbrella", actionPerformed=self.checkCallback)) tmpPanel.add(swing.JCheckBox("Rain coat", actionPerformed=self.checkCallback)) tmpPanel.add(swing.JCheckBox("Passport", actionPerformed=self.checkCallback)) tmpPanel.add(swing.JCheckBox("Airline tickets", actionPerformed=self.checkCallback)) tmpPanel.add(swing.JCheckBox("iPod", actionPerformed=self.checkCallback)) tmpPanel.add(swing.JCheckBox("Laptop", actionPerformed=self.checkCallback)) thirdTab.add(tmpPanel) tmpPanel = swing.JPanel() tmpPanel.layout = awt.GridLayout(4, 1) tmpPanel.border = swing.BorderFactory.createTitledBorder("My Pets") # # A ButtonGroup is used to indicate which radio buttons # go together. # buttonGroup = swing.ButtonGroup() radioButton = swing.JRadioButton("Dog", actionPerformed=self.radioCallback) buttonGroup.add(radioButton) tmpPanel.add(radioButton) radioButton = swing.JRadioButton("Cat", actionPerformed=self.radioCallback) buttonGroup.add(radioButton) tmpPanel.add(radioButton) radioButton = swing.JRadioButton("Pig", actionPerformed=self.radioCallback) buttonGroup.add(radioButton) tmpPanel.add(radioButton) radioButton = swing.JRadioButton("Capybara", actionPerformed=self.radioCallback) buttonGroup.add(radioButton) tmpPanel.add(radioButton) thirdTab.add(tmpPanel) self.window.pack() self.window.show() # # This is the callback that's run when the window closes. Here # we just exit. Note that either functions inside class # declarations or global functions can be callbacks. When they're # inside a class they talk 'self' as the first argument. Just # about all Swing callbacks also take an event argument as well. # def goodbye(self, event): print "Goodbye!" sys.exit() # # Callback for the "Click Me!" button on the first tab. This # creates a new window to display what was in the text field, # and then clears the text field. # def clickMeCallback(self, event): dialog = swing.JFrame("You clicked the button!") dialog.contentPane.layout = awt.BorderLayout() dialog.contentPane.add(swing.JLabel("Text was: " + self.field.text)) dialog.size=(400, 200) dialog.show() print "Text is ", self.field.text self.field.text = "" # # Callback for the "What's Selected?" button. This pops up a # window that shows the contents and index of the selected item. # def whatsSelectedCallback(self, event): dialog = swing.JFrame("Here's what's selected") dialog.contentPane.layout = awt.GridLayout(2, 1) dialog.contentPane.add(swing.JLabel("Selected value = " + str(self.list.selectedValue), swing.JLabel.CENTER)) dialog.contentPane.add(swing.JLabel("Selected index = " + str(self.list.selectedIndex), swing.JLabel.CENTER)) dialog.size=(400, 200) dialog.show() print "Selected value =", self.list.selectedValue, ", selected index =", self.list.selectedIndex; # # Callback for the "Go To" button; updates the contents of the # HTML pane. # def goToCallback(self, event): self.htmlPane.setPage(self.urlField.text) # # This callback is invoked whenever a link is clicked or moused # over. The event is a HyperlinkEvent, which means that it # defines certain fields and operations, which we can use below. # def followHyperlink(self, event): if event.eventType == swing.event.HyperlinkEvent.EventType.ACTIVATED: self.statusLine = event.URL.toString() self.htmlPane.setPage(event.URL) elif event.eventType == swing.event.HyperlinkEvent.EventType.ENTERED: self.statusLine = event.URL.toString() elif event.eventType == swing.event.HyperlinkEvent.EventType.EXITED: self.statusLine = "" # # This is a common technique when a bunch of widgets share a # single callback. You can look at the "source" field on the # event argument to see which widget generated the event. # def checkCallback(self, event): if event.source.selected: print event.source.text + " was CHECKED" else: print event.source.text + " was UNCHECKED" # # This is the callback for all the radio buttons. # def radioCallback(self, event): print event.source.text + " was clicked ON" # # This is how you make the main entry point for your program in Python. # The system variable __name__ will be set to the string __main__ if # this file is passed directly on the command line to Jython. # # Here, we simply create a SwingSampler, and it does everything from # there. # if __name__ == "__main__": sampler = SwingSampler() }}} |
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I'm learning Danish literature at a local high school and I'm just about to graduate.
I have a part time job in a post office.
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