Mailman 3 January 2016 - Tkinter-discuss

Control position of Tkinter common dialogs?
by python＠bdurham.com Dec. 9, 2016

Dec. 9, 2016

Python 2.7 under Windows: How can we control the position of Tkinter's common dialogs? Here's what we've discovered: * Certain common dialogs always open up relative to their parent window * Certain common dialogs always open up centered on the user's desktop * All common dialogs appear to ignore the optional parent= parameter Questions: * How can we force a dialog to open up relative to its parent window? * How can we force a dialog to open up centered on the user's desktop? Background: import tkColorChooser as colorchooser import tkFileDialog as filedialog import tkMessageBox as messagebox # always open up relative to parent windows fileOpen = filedialog.askopenfilename() fileOpens = filedialog.askopenfilenames() fileSaveAs = filedialog.asksaveasfilename() color = colorchooser.askcolor() # always open up centered on desktop folderOpen = filedialog.askdirectory() messagebox.askquestion() Malcolm

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'connect' widget classes in an application
by ingo Jan. 27, 2016

Jan. 27, 2016

In the code below I get the error below. I'm trying to create a class for several widgets and make the "interact" within a main Frame. Can't figure it out (lack of programming experience) and couldn't find an eye opening example. I understand that the toolbar has no way to access the txt in the editor, how do I make it so? TIA, Ingo ERROR: Exception in Tkinter callback Traceback (most recent call last): File "\Python35-32\lib\tkinter\__init__.py", line 1549, in __call__ return self.func(*args) File "twoclass.py", line 10, in <lambda> command=lambda: self.txt.insert(END, 'Button pressed.\n') AttributeError: 'Ttoolbar' object has no attribute 'txt' CODE: from tkinter import * class Ttoolbar(Frame): def __init__(self, parent=None): Frame.__init__(self, parent) self.btn = Button( self, text='Button', command=lambda: self.txt.insert(END, 'Button pressed.\n') ) self.btn.pack(side=LEFT) self.pack(side=LEFT) class Eedit(Text): def __init__(self, parent=None): txt = Text.__init__(self, parent) self.pack(fill='both', expand=Y) class Aapp(Frame): def __init__(self, parent=None): Frame.__init__(self, parent) self.pack() self.makeWidgets() def makeWidgets(self): tb = Ttoolbar().pack(side=TOP, fill=X) ed = Eedit().pack() if __name__ == '__main__': Aapp().mainloop()

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Lost images on tabs ttk.notebook
by ingo Jan. 19, 2016

Jan. 19, 2016

I'm trying to create a simple tabbed editor and merged two examples found on the web. One of those is the one with the closing images on the tabs. In the proces of understanding I somehowe lost the images on the tabs but not the fuctionality of clicking on the right position of the tabs. What is going wrong? TIA, Ingo import os from tkinter import * from tkinter import ttk class OPMLnotebook(Frame): def __init__(self): Frame.__init__(self) self.master.title('OPML Notebook') self._create_panel() def _tabbtn_press(self, event): x, y, widget = event.x, event.y, event.widget elem = widget.identify(x, y) index = widget.index("@%d,%d" % (x, y)) if "close" in elem: widget.state(['pressed']) widget.pressed_index = index def _tabbtn_release(self, event): x, y, widget = event.x, event.y, event.widget if not widget.instate(['pressed']): return elem = widget.identify(x, y) index = widget.index("@%d,%d" % (x, y)) if "close" in elem and widget.pressed_index == index: widget.forget(index) widget.event_generate("<<NotebookClosedTab>>") widget.state(["!pressed"]) widget.pressed_index = None def _create_panel(self): imgdir = os.path.join(os.path.dirname(__file__), 'img') i1 = PhotoImage("img_close", file=os.path.join(imgdir, 'close.gif')) i2 = PhotoImage("img_closeactive", file=os.path.join(imgdir, 'close_active.gif')) i3 = PhotoImage("img_closepressed", file=os.path.join(imgdir, 'close_pressed.gif')) style = ttk.Style() style.element_create("close", "image", "img_close", ("active", "pressed", "!disabled", "img_closepressed"), ("active", "!disabled", "img_closeactive"), border=10, sticky='') style.layout("ButtonNotebook", [("ButtonNotebook.client", {"sticky": "nswe"})]) style.layout("ButtonNotebook.Tab", [ ("ButtonNotebook.tab", {"sticky": "nswe", "children": [("ButtonNotebook.padding", {"side": "top", "sticky": "nswe", "children": [("ButtonNotebook.label", {"side": "left", "sticky": ''}), ("ButtonNotebook.close", {"side": "left", "sticky": ''})] })] })] ) self.bind_class("TNotebook", "<ButtonPress-1>", self._tabbtn_press, True) self.bind_class("TNotebook", "<ButtonRelease-1>", self._tabbtn_release) nb = ttk.Notebook(width=400, height=400, style="ButtonNotebook") nb.pressed_index = None nb.enable_traversal() nb.pack(fill='both', expand=1) self._create_text_tab(nb) self._create_text_tab(nb) def _create_text_tab(self, nb): frame = Frame(nb) txt = Text(frame, wrap=WORD, width=40, height=10) vscroll = Scrollbar(frame, orient=VERTICAL, command=txt.yview) txt['yscroll'] = vscroll.set vscroll.pack(side=RIGHT, fill=Y) txt.pack(fill='both', expand=Y) nb.add(frame, text='Text Editor', underline=0) if __name__ == '__main__': OPMLnotebook().mainloop()

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