Mailman 3 October 2004 - Tkinter-discuss

Re: Tkinter screen saver?
by Roland Kwee Oct. 11, 2004

Oct. 11, 2004

I am not making a screen saver, but a photo viewer. While overrideredirect(1) is great for going fullscreen, it doesn't seem possible to bind a keyboard event, e.g., to go to the next photo, or exit fullscreen mode. It seems that only mouse events work with overrideredirect(1), but then I need to display a button. How can we make, say, the escape button end fullscreen mode? Thanks in advance, Roland Fredrik Lundh wrote: ><dblank at mainline.brynmawr.edu> wrote: > >> I'm wondering if I can get Tkinter to make a window that covers the whole >> screen so that we can have a Python-based screen saver? > >from Tkinter import * >root = Tk() >w, h = root.winfo_screenwidth(), root.winfo_screenheight() >root.overrideredirect(1) >root.geometry("%dx%d+0+0" % (w, h)) >root.mainloop()

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Re: Storing structured, 'widget-specific-data', then loading it back in later
by Chris and Lisa Nethery Oct. 8, 2004

Oct. 8, 2004

Hello all. I've been extraordinarily busy this week, so just checked my email. Wow! Thank you, everyone, for your help! One of the things that I absolutely love about this forum is the willingness people have to help out the 'newbies', such as myself. I now have likely a week's worth of things to tinker with, learn from and try out in various different ways. Again, thank you for your help! Sincerely, Christopher Nethery

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how to wait for user input?
by stewart＠midtoad.homelinux.org Oct. 8, 2004

Oct. 8, 2004

hi all: I've got a Tkinter app working. One of its methods opens a Pmw combo-box and present a list of choices. I've added buttons to delete choices, select choices, and create a new choice. It's this latter button that is causing problems. When I create a choice, I invoke a method that asks for input on the name of a choice using an easygui entry field. So far so good. The next thing is to ask the user to select one of two possible config setting for her choice; I'm doing that with a top-level widget that contains a button for each of the two settings. The problem I'm having is that my method doesn't appear to stop and wait for the user to press a button, but intead goes ahead to the next step, which is to display the chosen config setting (which of course fails, since no choice has yet been made). How do I get the method to stop and wait for the config setting to be made in the toplevel window? I think that I need the toplevel button to be modal, so that as soon as it's drawn, execution stops on my choice-creation method. If this seems too abstract, I can post a sample app that demonstrates the behaviour. cheers Stewart

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Re: [Tkinter-discuss] Re: Storing structured, 'widget-specific-data', then loading it back in la ter
by Chris Nethery Oct. 8, 2004

Oct. 8, 2004

Fredrik, Sorry for the delay. Needed to work on this one a bit. I think you identified, rather quickly, an area I don't really understand. I have been struggling quite a bit with variable-passing (for starters) and function-calls. For the first example, I think I'm accessing the widget's position in memory. I think this is also true of the second example, but I am making the variables accessible to other methods in the class. For the third example, I believe that 'variable' becomes the function call. For the fourth and fifth examples, I am calling a function within another function and passing self.widget (as a variable) into the function that is called... ...I think. Also, I am very confused by: 1) The creation of a local function. Why do I need to do this? What are the rules that require one to create a 'sub'-function (nested function?) ? 2) The self=self statement in the my_callback function. Doesn't the class already know that self=self, and if not, why don't I have to do this every time I pass self to other functions in the class? 3) Lambda. This may be more of a 'How does Lambda work?' question than anything, but here goes... ...With Button(..., command=lambda: self.getStoredData(self.widget)), am I creating another local function within the Button-widget method-call? And, why do I need to do this, rather than call a variable assigned to the function call? Thank you for your help! --Christopher Nethery

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Storing structured, 'widget-specific-data', then loading it back in la ter
by Chris Nethery Oct. 5, 2004

Oct. 5, 2004

Hello everyone! I have been working on the following for a while and just cannot get it to work correctly, so I am hoping that someone could offer some advice. I am trying to create a group of (re-usable) methods that take user input data and store it for future reference, then reload it later to the same widget where it was originally created. I wrote the following program to try to get the process working. The first button is supposed to store the data, and the second button is meant to plug the data back into the widget. I seem to be having difficulty plugging the data back into the widget, because I cannot identify it(the widget) properly. Any thoughts? Thanking you in advance, Chris Nethery import marshal import Tkinter import Pmw root = Tkinter.Tk() screenWidth, screenHeight = root.maxsize() screenSize = "%dx%d" % (screenWidth, screenHeight) root.geometry(screenSize) Pmw.initialise(root) class DataManagement: def __init__(self,actualWidgetName,frame,widget,data): self.actualWidgetName = actualWidgetName self.f = frame collectedList = [] self.cL = collectedList self.widget = widget self.data = data self.dataStructure = [self.widget,self.data] if self.dataStructure not in self.cL: self.cL.append(self.dataStructure) file = open(self.widget + '.ats','wb') bytes = marshal.dump(self.dataStructure,file) file.close() self.testButton = Tkinter.Button(self.f, font=(('Verdana'), '7'), text='Test', command=self.getStoredData(self.widget)) self.testButton.place(relx=0.41,rely=0.01,anchor=Tkinter.NW) def getStoredData(self,widget): self.storeFile = open(widget + '.ats','rb') unmarshal = marshal.load(self.storeFile) self.unMarsheledData = unmarshal self.storeFile.close() self.outPutDataInNewWidget(self.unMarsheledData,self.widget,self.actualWidgetName) def outPutDataInNewWidget(self,unMarsheledData,widget,actualWidgetName): print unMarsheledData[0] print actualWidgetName['CB'] if unMarsheledData[0] == widget: actualWidgetName['CB'].selectitem(unMarsheledData[0], setentry = 1) else: print 'unMarsheledData[0] != fileName' # pass class CreateWidgets: def __init__(self,root): self.root = root self.mainFrame = Tkinter.Frame(self.root, relief=Tkinter.GROOVE, borderwidth=1, width=900, height=450) self.mainFrame.place(relx=0.01,rely=0.01,anchor=Tkinter.NW) stuff = ['1','2','3','4','5','6','7','8','9','10'] self.comboBox = Pmw.ComboBox( self.mainFrame, listbox_width=26, history=0, unique=0, dropdown=0, listbox_height=10, scrolledlist_items=stuff, ) self.comboBox.place(relx=0.01,rely=0.01,anchor=Tkinter.NW) frameHash = {self.comboBox:self.mainFrame} # Add more widgets later for item in [ (self.comboBox), ]: self.frame = frameHash[item] self.widget = str(item) self.data = item.component('entryfield').component('entry').get() self.actualWidgetName = {'CB':self.comboBox} self.saveButton = Tkinter.Button(self.mainFrame, font=(('Verdana'), '7'), text='Save', command=self.goStoreTheData) self.saveButton.place(relx=0.21,rely=0.01,anchor=Tkinter.NW) def goStoreTheData(self): DataManagement(self.actualWidgetName,self.mainFrame,self.widget,self.data) if __name__ == '__main__': W = CreateWidgets(root) root.mainloop()

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