try:
from ttk import Frame
from Tkconstants import RAISED
except ImportError:
from tkinter.ttk import Frame
from tkinter.constants import RAISED
class Item(Frame):
def __init__(self, master, x,y, width, height, value, style, selection_handler=None, drag_handler = None, drop_handler=None):
Frame.__init__(self, master, relief=RAISED, style=style, class_="Item")
self._x = x
self._y = y
self._width = width
self._height = height
self.tag = "tag%s"%id(self)
self.value = value
self._selection_handler = selection_handler
self._drag_handler = drag_handler
self._drop_handler = drop_handler
self.place(x=x, y=y, width= width, height=height)
self.bind_class(self.tag, "<ButtonPress-1>", self._on_selection)
self.bind_class(self.tag, "<B1-Motion>", self._on_drag)
self.bind_class(self.tag, "<ButtonRelease-1>", self._on_drop)
self.add_bindtag(self)
@property
def x(self):
return self._x
@property
def y(self):
return self._y
@property
def width(self):
return self._width
@property
def height(self):
return self._height
def add_bindtag(self, *args):
for widget in args:
bindtags = widget.bindtags()
if self.tag not in bindtags:
widget.bindtags((self.tag,) + bindtags)
def add_bindtag_to_children(self):
list_of_widgets = self.children.values()
while len(list_of_widgets) != 0:
widget = list_of_widgets.pop()
list_of_widgets.extend(widget.children.values())
self.add_bindtag(widget)
def _on_selection(self, event):
self.tkraise()
self._move_lastx = event.x_root
self._move_lasty = event.y_root
if self._selection_handler:
self._selection_handler(self)
def _on_drag(self, event):
self.master.update_idletasks()
cursor_x = self._x + event.x
cursor_y = self._y + event.y
self._x += event.x_root - self._move_lastx
self._y += event.y_root - self._move_lasty
self._move_lastx = event.x_root
self._move_lasty = event.y_root
self.place_configure(x=self._x, y=self._y)
if self._drag_handler:
self._drag_handler(cursor_x, cursor_y)
def _on_drop(self, event):
if self._drop_handler:
self._drop_handler()
def set_position(self, x,y):
self._x = x
self._y = y
self.place_configure(x =x, y =y)
def move(self, dx, dy):
self._x += dx
self._y += dy
self.place_configure(x =self._x, y =self._y)
class DDList(Frame):
def __init__(self, master, item_width, item_height, offset_x=0, offset_y=0, gap=0):
Frame.__init__(self, master)
self._item_width = item_width
self._item_height = item_height
self._offset_x = offset_x
self._offset_y = offset_y
self._limit_x = self._offset_x + self._item_width
self._gap = gap
self._index_of_selected_item = None
self._list_of_items = []
self._position = {}
self._index_of_container = None
def item(self, index="END", value=None, style="TFrame"):
index = self._process_index(index)
x = self._offset_x
y = self._offset_y + index * (self._item_height + self._gap)
item = Item(self.master, x,y, self._item_width, self._item_height, value, style, self._on_item_selected, self._on_item_dragged, self._on_item_dropped)
self._list_of_items.insert(index, item)
self._position[item] = index
return item
def delete_item(self, index):
if isinstance(index, Item):
index = self._position[item]
else:
index = self._process_index(index)
item = self._list_of_items.pop(index)
del self._position[item]
item.destroy()
for i in range(index, len(self._list_of_items)):
_item = self._list_of_items[i]
_item.move(0, -(self._item_height+self._gap))
self._position[_item] -= 1
del_item = delete_item
def get_item(self, index):
index = self._process_index(index)
return self._list_of_items[index]
def _process_index(self, index):
if isinstance(index, basestring) and index.upper() == "END":
index = len(self._list_of_items)
else:
index = int(index)
if index < 0:
index = len(self._list_of_items) + index
return index
def _on_item_selected(self, item):
self._index_of_selected_item = self._position[item]
self._index_of_container = self._index_of_selected_item
def _on_item_dragged(self, x, y):
limit_y = self._offset_y + len(self._list_of_items) * self._item_height + (len(self._list_of_items) -1) * self._gap
if self._offset_x < x < self._limit_x and self._offset_y < y < limit_y:
quotient, remainder = divmod(y-self._offset_y, self._item_height + self._gap)
if remainder < self._item_height:
new_container = quotient
if new_container != self._index_of_container:
if new_container > self._index_of_container:
for index in range(self._index_of_container+1, new_container+1, 1):
item = self._get_item_of_virtual_list(index)
item.move(0,-(self._item_height+self._gap))
else:
for index in range(self._index_of_container-1, new_container-1, -1):
item = self._get_item_of_virtual_list(index)
item.move(0,self._item_height+self._gap)
self._index_of_container = new_container
def _get_item_of_virtual_list(self, index):
if self._index_of_container == index:
raise Exception("No item in index: %s"%index)
else:
if self._index_of_container != self._index_of_selected_item:
if index > self._index_of_container:
index -= 1
if index >= self._index_of_selected_item:
index += 1
item = self._list_of_items[index]
return item
def _on_item_dropped(self):
item = self._list_of_items.pop(self._index_of_selected_item)
self._list_of_items.insert(self._index_of_container, item)
x = self._offset_x
y = self._offset_y + self._index_of_container *(self._item_height + self._gap)
item.set_position(x,y)
for i in range(min(self._index_of_selected_item, self._index_of_container),max(self._index_of_selected_item, self._index_of_container)+1):
item = self._list_of_items[i]
self._position[item] = i
self._index_of_container = None
self._index_of_selected_item = None
if __name__ == "__main__":
try:
from Tkinter import Tk, IntVar
from ttk import Label, Frame, Entry, Button
from tkMessageBox import messagebox
from Tkconstants import *
except ImportError:
from tkinter import Tk, IntVar, messagebox
from tkinter.ttk import Label, Frame, Entry, Button
from tkinter.constants import *
root = Tk()
root.title("DDList example")
root.geometry("%dx%d%+d%+d"%(640, 530, 0, 0))
sortable_list = DDList(root, 200, 100, offset_x=10, offset_y=10, gap =10)
sortable_list.pack(expand=True, fill=BOTH)
for i in range(4):
item = sortable_list.item(value=i)
label = Label(item, text="this is a label %s"%i)
label.pack(anchor=W, padx= (4,0), pady= (4,0))
item.add_bindtag_to_children()
frame = Frame(root)
frame.pack(fill=X, pady=(0, 10))
indexVar = IntVar()
label = Label(frame, text="Entry index of item to delete:")
label.pack(side=LEFT, padx=(10,6))
entry_of_index = Entry(frame,textvariable= indexVar, width=3)
def delete_item():
try:
index = indexVar.get()
except ValueError:
messagebox.showerror("Error", "Not a valid integer")
return
entry_of_index.delete(0, END)
sortable_list.delete_item(index)
entry_of_index.bind('<Return>', delete_item)
entry_of_index.pack(side=LEFT)
Button(frame, text="Delete", command=delete_item).pack(side=LEFT, padx=(3,0))
root.mainloop()
Diff to Previous Revision
--- revision 1 2016-11-12 23:23:06
+++ revision 2 2016-11-13 20:24:21
@@ -137,12 +137,21 @@
return item
def delete_item(self, index):
- index = self._process_index(index)
+
+ if isinstance(index, Item):
+ index = self._position[item]
+ else:
+ index = self._process_index(index)
item = self._list_of_items.pop(index)
- del self._item_positions[item]
+ del self._position[item]
item.destroy()
+
+ for i in range(index, len(self._list_of_items)):
+ _item = self._list_of_items[i]
+ _item.move(0, -(self._item_height+self._gap))
+ self._position[_item] -= 1
del_item = delete_item
@@ -152,8 +161,13 @@
return self._list_of_items[index]
def _process_index(self, index):
- if index.upper() == "END" or index == -1:
+ if isinstance(index, basestring) and index.upper() == "END":
index = len(self._list_of_items)
+ else:
+ index = int(index)
+ if index < 0:
+ index = len(self._list_of_items) + index
+
return index
def _on_item_selected(self, item):
@@ -217,18 +231,19 @@
if __name__ == "__main__":
try:
- from Tkinter import Tk
- from ttk import Label
+ from Tkinter import Tk, IntVar
+ from ttk import Label, Frame, Entry, Button
+ from tkMessageBox import messagebox
from Tkconstants import *
except ImportError:
- from tkinter import Tk
- from tkinter.ttk import Label
+ from tkinter import Tk, IntVar, messagebox
+ from tkinter.ttk import Label, Frame, Entry, Button
from tkinter.constants import *
root = Tk()
root.title("DDList example")
- root.geometry("%dx%d%+d%+d"%(640, 480, 0, 0))
-
+ root.geometry("%dx%d%+d%+d"%(640, 530, 0, 0))
+
sortable_list = DDList(root, 200, 100, offset_x=10, offset_y=10, gap =10)
sortable_list.pack(expand=True, fill=BOTH)
@@ -239,5 +254,27 @@
item.add_bindtag_to_children()
+ frame = Frame(root)
+ frame.pack(fill=X, pady=(0, 10))
+
+ indexVar = IntVar()
+ label = Label(frame, text="Entry index of item to delete:")
+ label.pack(side=LEFT, padx=(10,6))
+ entry_of_index = Entry(frame,textvariable= indexVar, width=3)
+
+ def delete_item():
+ try:
+ index = indexVar.get()
+ except ValueError:
+ messagebox.showerror("Error", "Not a valid integer")
+ return
+
+ entry_of_index.delete(0, END)
+ sortable_list.delete_item(index)
+ entry_of_index.bind('<Return>', delete_item)
+
+ entry_of_index.pack(side=LEFT)
+
+ Button(frame, text="Delete", command=delete_item).pack(side=LEFT, padx=(3,0))
root.mainloop()
