Re: [Matplotlib-users] Canvas coordinates vs. Plot coordinates
Use mpl events -- they work across user interface toolkits and handle stuff like which axes did you click in and what are the data coordinates Excellent, that did the trick. In just 2 minutes. :) Thanks a lot. Could I just chuck in one simple question: you may have noticed I am embedding everything in GTK. After calling gtk.main() is there any way I can modify the displayed window? Or do I have to bin the whole thing and start again? Thanks for your help, Matthew - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Canvas coordinates vs. Plot coordinates
On Wed, May 7, 2008 at 7:41 AM, Matthew Czesarski [EMAIL PROTECTED] wrote: Could I just chuck in one simple question: you may have noticed I am embedding everything in GTK. After calling gtk.main() is there any way I can modify the displayed window? Or do I have to bin the whole thing and start again? Sorry, I don't really understand the question, but you can certainly modify the gtk application, you will just need to do it in the gtk loop, eg in an idle or timeout handler, or in a callback. JDH - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Canvas coordinates vs. Plot coordinates
Dear Group,
What I need to do is to
1. produce a plot (DONE)
2. fix it so that mouse clicks in the canvas append the x coordinate of the
click to a list (DONE)
3. add a couple of buttons to the GUI, to reset the list and to kill the
window (DONE)
So I'm pretty successful so far. The only problem is that the coordinates
are in canvas coordinates, not plot coordinates. Now, rather embarrassingly,
I can't figure out how to get this right. It seems to be the case that all
the examples are in plot coordinates. As of course is the readout in the
GUI itself. Is there a simple way to fix this or do I have convert it to
some other backend? Or use something else instead of FigureCanvasGTK? This,
to me, made the most sense to me at the time of writing, although I must
confess I'm still pretty new to this.
I paste some stripped down code below.
Thanks in advance,
Matthew
#!/usr/bin/env python
import sys, os, string
import scipy as S
pygtk.require('2.0')
import gtk
#MPL.use('GTKAgg')
import pylab as P
from matplotlib.backends.backend_gtk import FigureCanvasGTK as FigureCanvas
from matplotlib.backends.backend_gtk import NavigationToolbar2GTK as
NavigationToolbar
class Stuff:
def reset(self, widget, data=None):
self.ranges= S.array([])
print self.ranges
def delete_event(self, widget, event, data=None):
print delete event occurred
return False
def destroy(self, widget, data=None):
gtk.main_quit()
def clickCanvas(self, widget, event):
if event.button==1:
self.ranges = S.append(self.ranges , event.x)
print self.ranges
def ZoneSetup(self):
x=S.rand(10)
y=S.rand(10)
win = gtk.Window()
win.connect(delete_event, self.delete_event)
win.connect(destroy, self.destroy)
win.set_default_size(600,450)
vbox = gtk.VBox()
hbox = gtk.HBox()
win.add(vbox)
fig = P.Figure(figsize=(5,4), dpi=100)
ax = fig.add_subplot(111)
ax.plot(x, y, c='red', ls='-')
canvas = FigureCanvas(fig)
vbox.pack_start(canvas)
toolbar = NavigationToolbar(canvas, win)
hbox.pack_start(toolbar)
bReset = gtk.Button(Reset)
bQuit = gtk.Button(Quit)
hbox.pack_start(bReset, False, False, 0)
hbox.pack_start(bQuit, False, False, 0)
vbox.pack_start(hbox, False, False)
bReset.connect (clicked, self.reset)
bQuit.connect_object(clicked, gtk.Widget.destroy, win)
canvas.connect(button_press_event, self.clickCanvas)
win.show_all()
gtk.main()
def __init__(self):
self.ranges= S.array([])
a=Stuff()
a.ZoneSetup()
print a.ranges
-
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Re: [Matplotlib-users] Canvas coordinates vs. Plot coordinates
On Tue, May 6, 2008 at 11:17 AM, Matthew Czesarski
[EMAIL PROTECTED] wrote:
So I'm pretty successful so far. The only problem is that the coordinates
are in canvas coordinates, not plot coordinates. Now, rather embarrassingly,
I can't figure out how to get this right. It seems to be the case that all
the examples are in plot coordinates. As of course is the readout in the
GUI itself. Is there a simple way to fix this or do I have convert it to
some other backend? Or use something else instead of FigureCanvasGTK? This,
to me, made the most sense to me at the time of writing, although I must
confess I'm still pretty new to this.
Use mpl events -- they work across user interface toolkits and handle
stuff like which axes did you click in and what are the data
coordinates
def onclick(event):
print 'axes', event.inaxes
if event.inaxes is None: return
print 'canvas', event.x, event.y
print 'data', event.xdata, event.ydata
cid = fig.canvas.mpl_connect('button_press_event', onclick)
See matplotlib.backend_bases.Event and derived classes for details on
available attributes. See
matplotlib.backend_bases.FigureCanvasBase.mpl_connect for details on
valid signals,
-
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Use priority code J8TL2D2.
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