Hi all,
answering to my own email :)
#2. I found out my mistake why the Label doesn't appear on the second window
the "event" that it is passed to the dnd_motion is the event referring to the
original
window and not the target one. So instead of using the event.x, event.y
I need to use the root coordinates and I convert them to local ones
x = event.x_root - self.winfo_rootx()
y = event.y_root - self.winfo_rooty()
self.dnd_item.place(x=x, y=y)
#1. However I cannot get rid of the #1. I've tried to subclass the DndHandler()
especially the on_motion() method to delete the text anchor (dirty hack) after
looking at the text.tcl as well deleting the selection and calling the
CancelRepeat
to avoid the auto-scrolling, but nothing worked ok.
Is there a way to tell the Text() to stop the selection?
class MyDndHandler(Dnd.DndHandler):
def __init__(self, source, event):
super().__init__(source, event)
anchor = self.source.tk.call("tk::TextAnchor", self.source._w)
self.source.mark_unset(anchor)
def on_motion(self, event):
super().on_motion(event)
anchor = self.source.tk.call("tk::TextAnchor", self.source._w)
self.source.mark_unset(anchor)
# if self.target is not self.source:
self.source.tk.call("tk::CancelRepeat")
# self.source.tag_remove(tk.SEL, "1.0", tk.END)
return "break"
def dnd_start(source, event):
h = MyDndHandler(source, event)
if h.root:
return h
else:
return None
Vasilis
________________________________________
From: Tkinter-discuss
[tkinter-discuss-bounces+vasilis.vlachoudis=cern...@python.org] on behalf of
Vasilis Vlachoudis [vasilis.vlachou...@cern.ch]
Sent: Wednesday, October 31, 2018 15:27
To: tkinter-discuss@python.org
Subject: [Tkinter-discuss] Text drag&drop
Hi all,
moving from Canvas() to Text() I wanted to re-implement the same drag&drop
functionality I have.
I created a small test program show my problem(s).
I am creating two, Toplevel windows with MyText() inside.
The MyText extends the Text and adds a drag&drop.
For demonstration I've binded on the Control-Button-1 the starting of the drag
action
it creates a "floating" Label() with the selected text, which is placed at the
mouse position.
Now the problems:
1. The selection on the "drag" window keeps changing as I move the mouse.
The selection is changing as if there was a grab_set() even if the cursor is
on the second window.
2. If I drag the mouse on the second window, despite the Label is created() it
doesn't show it.
How can I correct those problems?
Many thanks in advance
Vasilis
import tkinter as tk
import tkinter.dnd as Dnd
class MyText(tk.Text):
def __init__(self, master, *kw, **kwargs):
super().__init__(master, *kw, **kwargs)
self.bind("<Control-Button-1>", self.button1)
self.dnd_text = None
# ----------------------------------------------------------------------
def button1(self, event):
Dnd.dnd_start(text1, event)
self.dnd_text = text1.get(tk.SEL_FIRST, tk.SEL_LAST)
# ----------------------------------------------------------------------
def dnd_accept(self, source, event):
return self
# ----------------------------------------------------------------------
def dnd_enter(self, source, event):
self.focus_set()
self.dnd_item = tk.Label(self, text=source.dnd_text,
border=2, relief=tk.RAISED)
self.dnd_motion(source, event)
# ----------------------------------------------------------------------
def dnd_leave(self, source, event):
self.dnd_item.place_forget()
self.dnd_item = None
# ----------------------------------------------------------------------
def dnd_motion(self, source, event):
self.dnd_item.place(x=event.x, y=event.y)
# ----------------------------------------------------------------------
def dnd_end(self, target, event):
if self.dnd_item:
self.dnd_item.place_forget()
self.dnd_item = None
self.dnd_text = None
# ----------------------------------------------------------------------
# Object has been dropped here
# ----------------------------------------------------------------------
def dnd_commit(self, source, event):
if self.dnd_item:
self.dnd_item.place_forget()
self.dnd_item = None
if source.dnd_text is None: return
self.insert(tk.CURRENT, source.dnd_text)
self.dnd_text = None
root=tk.Tk()
root.title("Top1")
text1 = MyText(root)
text1.pack(fill=tk.BOTH, expand=tk.YES)
for i in range(1000):
text1.insert(tk.END, "%d The quick brown fox jumps over the lazy dog's
tail\n"%(i))
top2 = tk.Toplevel(root)
top2.title("Top2")
text2 = MyText(top2)
text2.pack(fill=tk.BOTH, expand=tk.YES)
root.mainloop()
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