On Mon, 18 Jul 2005 13:54:45 +0000
"Alberto Troiano" <[EMAIL PROTECTED]> wrote:
> Hey tutors
>
> I'm using the Multilistbox class and I noticed that it only handles the
> mouse scroll and the scrollbar to go down or up.I succesfully implemented
> the sort function that came with the class
> I also added code to handle the up and down arrow keys and it goes down all
> right but only select the item and it doesn't scroll down or up
>
> How can make it go up or down?
> I'm sendind the class here:
>
Hi Alberto,
I haven't tested your code, but if I understand you correctly, the problem
is that the list is not automatically scrolled when you select a new item with
the Up and Down keys (right?).
Maybe it's the easiest to add a line like this to your _select1() and
_select2() methods:
l.see(int(l.curselection()[0]))
where l is the first of the listboxes; this should make sure the selected item
is visible
(at least if you use selectmode=SINGLE). If keeping all lists in sync works,
this
should be enough to scroll all other lists, too (like I said, untested though).
I hope this helps
Michael
> class MultiListbox(Frame):
> fila=0
> sortedBy=-1
> def __init__(self, master, lists):
> Frame.__init__(self, master)
> self.lists = []
> for l,w,a in lists:
> frame = Frame(self,background="red"); frame.pack(side=LEFT,
> expand=YES,
> fill=BOTH)
> Button(frame,background="red",foreground="white",font="Verdana 8
> bold",text=l, borderwidth=1, relief=RAISED,command=lambda a=a:
> self._sortBy(a)).pack(fill=X)
> lb = Listbox(frame, width=w, borderwidth=0, selectborderwidth=0,
> relief=FLAT, exportselection=FALSE)
> lb.pack(expand=YES, fill=BOTH)
> self.lists.append(lb)
> lb.bind('<B1-Motion>', lambda e, s=self: s._select(e.y))
> lb.bind('<Double-Button-3>', lambda e, s=self: s._devolverfila(e.y))
> lb.bind('<Return>', lambda e, s=self: s._devolverfila(e.y))
> lb.bind('<Button-1>', lambda e, s=self: s._select(e.y))
> lb.bind('<Down>', lambda s: _select1())
> lb.bind('<Up>', lambda s: _select2())
> lb.bind('<Leave>', lambda e: 'break')
> lb.bind('<B2-Motion>', lambda e, s=self: s._b2motion(e.x, e.y))
> lb.bind('<Button-2>', lambda e, s=self: s._button2(e.x, e.y))
> frame = Frame(self,background="red"); frame.pack(side=LEFT, fill=Y)
> Label(frame,background="red",foreground="white",font="Verdana 8 bold",
> borderwidth=1, relief=RAISED).pack(fill=X)
> sb = Scrollbar(frame,background="red", orient=VERTICAL,
> command=self._scroll)
> sb.pack(expand=YES, fill=Y)
> self.lists[0]['yscrollcommand']=sb.set
>
> def _sortBy(self, column):
> """ Sort by a given column. """
> if column == self.sortedBy:
> direction = -1 * self.direction
> else:
> direction = 1
> elements = self.get(0, END)
> self.delete(0, END)
> elements.sort(lambda x, y: self._sortAssist(column, direction, x,
> y))
> self.insert(END, *elements)
> self.sortedBy = column
> self.direction = direction
>
> def _sortAssist(self, column, direction, x, y):
> if column!=0:
> c = cmp(x[column], y[column])
> if c:
> return direction * c
> else:
> return direction * cmp(x, y)
> else:
> c = cmp(int(x[column]), int(y[column]))
> if c:
> return direction * c
> else:
> return direction * cmp(x, y)
>
> def _select(self, y):
> row = self.lists[0].nearest(y)
> self.selection_clear(0, END)
> self.selection_set(row)
> self.fila=row
> return 'break'
>
> def _devolverfila(self, y):
> row = self.lists[0].nearest(y)
> self.selection_clear(0, END)
> self.selection_set(row)
> self.fila=row
>
> def _select1(self):
> if self.fila==self.size()-1:
> pass
> else:
> self.selection_clear(0, END)
> self.selection_set(self.fila+1)
> self.fila+=1
> self._scroll()
> return 'break'
>
> def _select2(self):
> if self.fila==0:
> pass
> else:
> self.selection_clear(0, END)
> self.selection_set(self.fila-1)
> self.fila-=1
> return 'break'
>
> def _button2(self, x, y):
> for l in self.lists: l.scan_mark(x, y)
> return 'break'
>
> def _b2motion(self, x, y):
> for l in self.lists: l.scan_dragto(x, y)
> return 'break'
>
> def _scroll(self, *args):
> for l in self.lists:
> apply(l.yview, args)
>
> def curselection(self):
> return self.lists[0].curselection()
>
> def delete(self, first, last=None):
> for l in self.lists:
> l.delete(first, last)
>
> def get(self, first, last=None):
> result = []
> for l in self.lists:
> result.append(l.get(first,last))
> if last: return apply(map, [None] + result)
> return result
>
> def index(self, index):
> self.lists[0].index(index)
>
> def insert(self, index, *elements):
> for e in elements:
> i = 0
> for l in self.lists:
> l.insert(index, e[i])
> i = i + 1
>
> def size(self):
> return self.lists[0].size()
>
> def see(self, index):
> for l in self.lists:
> l.see(index)
>
> def selection_anchor(self, index):
> for l in self.lists:
> l.selection_anchor(index)
>
> def selection_clear(self, first, last=None):
> for l in self.lists:
> l.selection_clear(first, last)
>
> def selection_includes(self, index):
> return self.lists[0].selection_includes(index)
>
> def selection_set(self, first, last=None):
> for l in self.lists:
> l.selection_set(first, last)
>
>
> THanks in advanced
>
> Alberto
>
>
> _______________________________________________
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
>
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http://mail.python.org/mailman/listinfo/tutor
