On 6/5/07, Mark Bakker <[EMAIL PROTECTED]> wrote:
I think a prompt could be very useful in MPL, just to build small little
GUI's that only need 1 or 2 boxes.
I also realize it is not easy, and for bigger jobs you want a full GUI
environment like wx or Tk anyway, so I understand it when developers set
other priorities.
Then again, I would really use it,
Mark
> From: Matthias Michler < [EMAIL PROTECTED]>
>
> Hello everybody,
>
> Now my question is: Could a prompt be a useful part of matplotlib?
I worked on this some time ago, I never got to the point where I
thought it was ready for production but it is close. There is a
problem if usetex is enabled, because partial tex strings will cause
errors. But you can use it with regular text or plain text.
Give it a whirl -- I don't mind including tit in matplotlib.widgets
if people think it would be usefult. I do think there is a niche for
these kinds of things where people want brain dead simple widgets w/o
having to deal with GUI toolkits.
I'm pasting the example below, and also attaching it in case the lines
get wrapped
# usetex not supported
import matplotlib
matplotlib.rcParams['text.usetex'] = False
import matplotlib.transforms as transforms
import matplotlib.widgets as widgets
from pylab import figure, show, nx
class TextBox(widgets.Widget):
def __init__(self, ax, s=''):
self.canvas = ax.figure.canvas
self.text = ax.text(0.025, 0.2, s,
fontsize=14,
#verticalalignment='baseline',
horizontalalignment='left',
transform=ax.transAxes)
self.ax = ax
ax.set_yticks([])
ax.set_xticks([])
ax.set_navigate(False)
self.canvas.draw()
self.canvas.mpl_connect('key_press_event', self.keypress)
self.region = self.canvas.copy_from_bbox(ax.bbox)
r = self._get_text_right()
self.cursor, = ax.plot([r,r], [0.2, 0.8], transform=ax.transAxes)
self.redraw()
def redraw(self):
self.ax.redraw_in_frame()
self.canvas.blit(self.ax.bbox)
def keypress(self, event):
if event.key is not None and len(event.key)>1: return
t = self.text.get_text()
if event.key is None: # simulate backspace
if len(t): newt = t[:-1]
else: newt = ''
else:
newt = t + event.key
self.text.set_text(newt)
r = self._get_text_right()
self.cursor.set_xdata([r,r])
self.redraw()
def _get_text_right(self):
l,b,w,h = self.text.get_window_extent().get_bounds()
r = l+w+2
t = b+h
s = self.text.get_text()
# adjust cursor position for trailing space
numtrail = len(s) - len(s.rstrip())
en =
self.ax.get_renderer_cache().points_to_pixels(self.text.get_fontsize())/2.
r += numtrail*en
l,b = self.ax.transAxes.inverse_xy_tup((l,b))
r,t = self.ax.transAxes.inverse_xy_tup((r,t))
return r
fig = figure()
ax = fig.add_axes([0.1, 0.1, 0.8, 0.7])
ax.plot([1,2,3])
#rc('text', usetex=1)
fig.text(0.39, 0.875, 'My label: ',
horizontalalignment='right', verticalalignment='center')
axtext = fig.add_axes([0.4, 0.85, 0.5, 0.05])
box = TextBox(axtext)
show()
# usetex not supported
import matplotlib
matplotlib.rcParams['text.usetex'] = False
import matplotlib.transforms as transforms
import matplotlib.widgets as widgets
from pylab import figure, show, nx
class TextBox(widgets.Widget):
def __init__(self, ax, s=''):
self.canvas = ax.figure.canvas
self.text = ax.text(0.025, 0.2, s,
fontsize=14,
#verticalalignment='baseline',
horizontalalignment='left',
transform=ax.transAxes)
self.ax = ax
ax.set_yticks([])
ax.set_xticks([])
ax.set_navigate(False)
self.canvas.draw()
self.canvas.mpl_connect('key_press_event', self.keypress)
self.region = self.canvas.copy_from_bbox(ax.bbox)
r = self._get_text_right()
self.cursor, = ax.plot([r,r], [0.2, 0.8], transform=ax.transAxes)
self.redraw()
def redraw(self):
self.ax.redraw_in_frame()
self.canvas.blit(self.ax.bbox)
def keypress(self, event):
if event.key is not None and len(event.key)>1: return
t = self.text.get_text()
if event.key is None: # simulate backspace
if len(t): newt = t[:-1]
else: newt = ''
else:
newt = t + event.key
self.text.set_text(newt)
r = self._get_text_right()
self.cursor.set_xdata([r,r])
self.redraw()
def _get_text_right(self):
l,b,w,h = self.text.get_window_extent().get_bounds()
r = l+w+2
t = b+h
s = self.text.get_text()
# adjust cursor position for trailing space
numtrail = len(s) - len(s.rstrip())
en = self.ax.get_renderer_cache().points_to_pixels(self.text.get_fontsize())/2.
r += numtrail*en
l,b = self.ax.transAxes.inverse_xy_tup((l,b))
r,t = self.ax.transAxes.inverse_xy_tup((r,t))
return r
fig = figure()
ax = fig.add_axes([0.1, 0.1, 0.8, 0.7])
ax.plot([1,2,3])
#rc('text', usetex=1)
fig.text(0.39, 0.875, 'My label: ',
horizontalalignment='right', verticalalignment='center')
axtext = fig.add_axes([0.4, 0.85, 0.5, 0.05])
box = TextBox(axtext)
show()
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