--------- Mensaje reenviado --------
> De: Michael Lange <klappn...@web.de>
> Para: tkinter-discuss@python.org
> Asunto: Re: [Tkinter-discuss] Create Grips for modificated size
> controls
> Fecha: Mon, 6 Dec 2010 17:59:45 +0100
>
> Hi,
>
> Thus spoketh craf <p...@vtr.net>
> unto us on Mon, 06 Dec 2010 12:29:25 -0300:
>
> > Hi.
> >
> > Is it possible to create pinch points(grips) to resize a control, as is
> > done in visual basic.?
> >
> > Example.
> >
> >
> >
> > x-----------x------------x
> > | |
> > | |
> > x Button x ----> Grip
> > | |
> > | |
> > x-----------x------------x
> >
>
> this seems not completely trivial, maybe you can set up something using
> the place geometry manager. Here's a small example that lets you resize a
> button :
>
> #############################################################
> from Tkinter import *
> root = Tk()
> root.geometry('400x400')
>
> f = Frame(root, bd=2, cursor='crosshair')
> f.place(x=100, y=100)
> b = Button(f, text='foo', cursor='arrow')
> b.pack(fill='both', expand=1)
>
> def resize(event):
> # check we're on the button's right edge:
> if event.x_root > event.widget.winfo_rootx() + 10:
> w = event.x_root - event.widget.winfo_rootx()
> f.place(width=w)
>
> f.bind('<B1-Motion>', resize)
> root.mainloop()
> ############################################################
>
> This of course only works horizontally and only on the right side of the
> button, but I think you'll see the point. For methods to resize the
> button in the three other dimensions, look at the widget's winfo_...()
> methods, the information provided from pack_info() and the event's
> attributes.
> If you want visible grips, you can use a Canvas instead of the Frame and
> draw for example a few triangles (with create_polygon()) onto the Canvas'
> edges, and then update the triangles' coordinates from within the resize()
> callback.
>
> You may also want to look at the "Page" Tkinter gui builder
> (http://page.sourceforge.net/), which (iirc) makes heavy use of place() to
> resize widgets, and which in fact does exactly what you want (click on a
> widget -> "grips" are drawn around it , which you can drag), but I think
> Page is written in Tcl.
>
> I hope this helps
>
> Michael
>
>
>
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Guauuu¡, thanks Michael for the code, it's perfect.
Regards.
CRAF
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