Mailman 3 August 2006 - Tkinter-discuss

Framed
by Cam Nov. 28, 2006

Nov. 28, 2006

Hello list, The following little test program works as expected. But if you change the line marked "----- Here ----" so it reads: self.Frame2 = Pmw.ScrolledFrame(self) then it blows up on an error deep inside Tkinter when attempting to create the button mentioned on the following line. All I wanted to do was trade a Frame for a ScrolledFrame. I'm stumped as to why it blows up. Anybody out there know? Thanks Cam ps I realize that in this example Frame2 is redundant. I encountered the problem in a larger case. To generate the example shown below I stripped out pretty much everything that wasn't necessary to demonstrate the problem. - - - - - import Pmw from Tkinter import * class Test(Frame): def __init__(self,Master=None,**kw): apply(Frame.__init__,(self,Master),kw) self.Frame2 = Frame(self) #<---- HERE ---- self.Frame2.pack(side='left') self.Button1 = Button(self.Frame2) self.Button1.pack(side='top') Root = Tk() Pmw.initialise(Root) App = Test(Root) App.pack(expand='yes',fill='both') Root.geometry('640x480+10+10') Root.mainloop()

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How to get DIB into Tkinter frame?
by Reiner M. Stoss Sept. 4, 2006

Sept. 4, 2006

Folks, I have a problem. I have a scriptable software that works with images in FITS format (astronomical images). It can generate Windows device-independent bitmaps (DIB) and paint them as picture into any device context including Picture controls in Visual Basic, etc. Here is VB sample code that works for me: --- Private Sub Command1_Click() Set p = CreateObject("PinPoint.Plate") p.AttachFITS "M:\Images\LaSagra\20060828\012128+170000-sagra21-S001-R001.fts" Set m = p.NewPlateDIB() m.Create 1, 1, 1, 1 m.Render 60000, 0 m.PaintPicture Picture1.hDC p.DetachFITS End Sub --- The PaintPicture method sends the picture into the PictureBox Picture1. Now how to do the same in Python/Tkinter? I have something as this: --- p = win32com.client.dynamic.Dispatch('PinPoint.Plate') p.AttachFITS('M:/Images/LaSagra/20060828/012128+170000-sagra21-S001-R001.fts') m = p.NewPlateDIB() m.Create(1, 1, 1, 1) m.Render(60000, 0) m.PaintPicture(im) #Here some Tkinter lines like root = Tk() etc. def expose(event): dib = ImageWin.Dib(im) dib.expose(ImageWin.HDC(left_frame.winfo_id())) left_frame.bind("", expose) p.DetachFITS() --- But it crashes with this message: --- Traceback (most recent call last): File "L:\pin.py", line 91, in ? m.PaintPicture(im) NameError: name 'im' is not defined --- Clearly the problem is the argument I provide when I call PaintPicture(). So how to get the picture painted by PaintPicture() into a Tkinter frame? Thanks, Reiner

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Cascade menu issue
by Michel Peru Aug. 23, 2006

Aug. 23, 2006

Hi all, Is there a way to make a cascade menu open when the mouse pointer simply stays on the corresponding menu entry? That works "naturally" under Windows, but under Linux one must click on the menu entry in order to make the cascade menu open. Thank you for helping. Michel ----------------------------------------------------------- Michel PERU peru(a)esrf.fr tel:04-76-88-22-46 ESRF 6 rue J.Horowitz 38043 Grenoble Cedex 09 -----------------------------------------------------------

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Re: [Tkinter-discuss] validating an entry
by Jeff Cagle Aug. 22, 2006

Aug. 22, 2006

So it turned out that validating was not too hard, but you had to Google for the documentation. Your name, Cameron, showed up a couple of times... Here's the code: # Testing an edit box with validation from Tkinter import * class MyEntry(Entry): def __init__(self, master, maxchars): Entry.__init__(self, master, validate = "key", validatecommand=self.validatecommand) self.MAX = maxchars def validatecommand(self, *args): return len(self.get()) < self.MAX if __name__ == '__main__': tkmain = Tk() e = MyEntry(tkmain, 5) e.grid() tkmain.mainloop() The validatecommand has to return a Boolean. I have no idea of the following, and haven't been able to find answers yet online: 1) what args are passed to validatecommand? Obviously *args scoops them up, but would one ever want to use them? 2) what values other than "key" are acceptable to validate? Thanks, Jeff Cagle

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listbox formatting
by Jeff Cagle Aug. 20, 2006

Aug. 20, 2006

I have strings that are composed of multiple properties within an object. I wanted to format the strings so that they came out nicely in a listbox. However, listbox widgets choke on the '\t' character, so I tried to roll my own: def get_lbstring(self): s = self.datestring return s + " " * (20 - len(s)) + self.name unfortunately, listboxes *also* have variable-width fonts (at least as the default). Short of changing to Courier font, is there a way to get items to line up in a listbox? Thanks, Jeff Cagle

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Re: [Tkinter-discuss] Tkinter-discuss Digest, Vol 30, Issue 4
by Jeff Cagle Aug. 20, 2006

Aug. 20, 2006

I got this reply from Cameron Laird and thought it would be worth passing on. Thanks to all for their input on this and the other question. On Sun, Aug 20, 2006 at 01:31:51AM -0400, Jeff Cagle wrote: . . . >> I would like to be able to cap the size of an entry so that the user can >> only type a max of n characters. In practice, it may not matter, but >> it seems like good programming practice to have a cap on input buffers. :-) >> >> Is there any way to do such a thing? > > . . . Yes. You can use PMW; an example would be Pmw.EntryField(validate = {'max': 13}) Alternatively, you can write you own validatecommand for the Entry. Also, it might interest you that an Entry *can* be multi-line, with built-in wrapping.

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Entry widget max size
by Jeff Cagle Aug. 20, 2006

Aug. 20, 2006

I would like to be able to cap the size of an entry so that the user can only type a max of n characters. In practice, it may not matter, but it seems like good programming practice to have a cap on input buffers. :-) Is there any way to do such a thing? Thanks, Jeff Cagle

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Dialog placement relative to main window or frame
by Jeff Cagle Aug. 13, 2006

Aug. 13, 2006

Hi all, I'm just learning, so I apologize in advance for a possibly dumb question. I want to create an interface that has info at the top, buttons down the left side, and then a large space on the bottom right. When the user presses a button, the appropriate dialog box pops into the large space. I believe I want a dialog, rather than a simple frame, in order to be able to have a nice title bar, make use of the "Close" button, etc. Problem: How can I configure the dialog box so that it moves if the main window also moves? I thought I might use an event trigger, somthing like: mainw.bind("<When-I-Move>",func=mydialog.reconfig) ... def mydialog.reconfig(event): get coords of mainw set new coords of mydialog However, I can't find a "When the window moves" event in the docs. Thoughts? Thanks, Jeff Cagle

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Changing title bar color in Tkinter
by Mezesh Aug. 3, 2006

Aug. 3, 2006

Hey, Does anyone know if it's possible to change the bluish color of a Tkinter window title bar to some other color (especially on linux)? Thanks, Ernest -- View this message in context: http://www.nabble.com/Changing-title-bar-color-in-Tkinter-tf2044364.html#a5… Sent from the Python - tkinter-discuss forum at Nabble.com.

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