Jim Kleckner wrote:
[snip]
What I actually want is to construct and add new widgets
during the mainloop(). So a button that appends new labels
at the bottom based on a text entry field would demonstrate
the issue.
I've been playing with this extremely simple and interesting
tVector helper code from here:
http://www.freenet.org.nz/python/tVector/
Ideally, I just want to reach in and extend the widget list.
I'm attaching a file with some concept code using tVector
(yes, I should rewrite it with grid, I guess).
The grid manager looks interesting and it seems that it
ought to be able do something like this but the methods
don't obviously have an append() or some such.
Ok, I hacked together a grid-based demo.
Care to comment on this code?
Jim
# Adapted from http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965
import Tkinter
class DeleteButton(Tkinter.Button):
def __init__(self, parent):
self.m_parent = parent
Tkinter.Button.__init__(self, parent, text="-", command=self.deleteRow)
def deleteRow(self):
# print "grid_info:", self.grid_info()
#
row = self.grid_info()["row"]
print "deleting row:", row
l = list( self.m_parent.grid_slaves(row=row) )
for w in l:
w.grid_forget()
class TestDisplayWithGrid:
def __init__(self, parent, debug=0,):
self.m_debug = debug
self.m_parent = parent
self.m_currentRow = 0
initialList = [
("Row1Col1", "Row1Col2", ),
("Row2Col1", "Row2Col2", ),
]
#
# Widgets to add a row
self.m_currentRow = 0
wid = Tkinter.Button( parent, text="+", command=self.addRow, )
wid.grid(row=self.m_currentRow, column=0)
wid = Tkinter.Entry( parent, name='col1', text="col1",)
wid.grid(row=self.m_currentRow, column=1)
if self.m_debug > 0:
print "col1:", wid.__dict__
self.m_col1Entry = wid
wid = Tkinter.Entry( parent, name='col2', text="col2",)
wid.grid(row=self.m_currentRow, column=2)
self.m_col2Entry = wid
#
# Initial rows:
for i in initialList:
self.m_currentRow += 1
if self.m_debug > 0:
print "Adding row:", i
wid = DeleteButton( self.m_parent, )
wid.grid(row=self.m_currentRow, column=0,)
wid = Tkinter.Label( parent, text=i[0],)
wid.grid(row=self.m_currentRow, column=1,)
wid = Tkinter.Label( parent, text=i[1],)
wid.grid(row=self.m_currentRow, column=2,)
#
def addRow(self):
if self.m_debug > 0:
print "clicked button to add row"
self.m_currentRow += 1
wid = DeleteButton( self.m_parent, )
wid.grid(row=self.m_currentRow, column=0,)
wid = Tkinter.Label( self.m_parent, text=self.m_col1Entry.get(),)
wid.grid(row=self.m_currentRow, column=1,)
wid = Tkinter.Label( self.m_parent, text=self.m_col2Entry.get(),)
wid.grid(row=self.m_currentRow, column=2,)
#
def mainloop(self):
self.m_parent.mainloop()
if __name__ == '__main__':
root = Tkinter.Tk()
root.title("Test dynamic")
app = TestDisplayWithGrid(root, debug=10)
app.mainloop()
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