hi,
i have app when i use a Rectangle selector to definit some area inside plot the problem is i want to plot area inside rectangelselector , so i need to def onpick event when i click inside rectangle is will be connect to other canvas to plot area inside rectangle i look in this example https://matplotlib.org/users/event_handling.html but i can’t find solution for my idea !!
that my code i need to know when and how i can def onpick event and plot it in other canvas !!
import wx
import numpy as np
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.figure import Figure
from matplotlib.widgets import RectangleSelector
import matplotlib
import matplotlib.pyplot as plt
def line_select_callback(eclick, erelease):
‘eclick and erelease are the press and release events’
x1, y1 = eclick.xdata, eclick.ydata
x2, y2 = erelease.xdata, erelease.ydata
print("(%3.2f, %3.2f) --> (%3.2f, %3.2f)" % (x1, y1, x2, y2))
print(" The button you used were: %s %s" % (eclick.button, erelease.button))
class Window(wx.Frame):
“”" Fenêtre principale de l’application “”"
def __init__(self, **kwargs):
super().__init__(None, **kwargs)
RootPanel(self)
class RootPanel(wx.Panel):
“”" Panel contenant tous les autres widgets de l’application “”"
def __init__(self, parent):
super().__init__(parent)
panel_buttons = wx.Panel(self)
panel_buttons_sizer = wx.GridSizer(1, 2, 0, 0)
canvas_panel = CanvasPanel(self)
select_button = PickButton(
panel_buttons,
"netCDF4 files (nc)|*.nc",
canvas_panel.load_from_file,
label="Show on this window (nc)",
)
toplevel_select_button = TopLevelPickButton(
panel_buttons,
"Text files (txt)|*.txt|All files|*.*",
label="Show on separate window (txt)",
)
panel_buttons_sizer.Add(select_button)
panel_buttons_sizer.Add(toplevel_select_button)
panel_buttons.SetSizer(panel_buttons_sizer)
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(panel_buttons)
sizer.Add(canvas_panel)
self.SetSizer(sizer)
class PickButton(wx.Button):
“”" Bouton permettant de choisir un fichier “”"
def __init__(self, parent, wildcard, func, **kwargs):
# func est la méthode à laquelle devra être foruni le fichier sélectionné
super().__init__(parent, **kwargs)
self.wildcard = wildcard
self.func = func
self.Bind(wx.EVT_BUTTON, self.pick_file)
def pick_file(self, evt):
style = style = wx.FD_OPEN | wx.FD_FILE_MUST_EXIST | wx.FD_MULTIPLE
with wx.FileDialog(
self, "Pick files", wildcard=self.wildcard, style=style
) as fileDialog:
if fileDialog.ShowModal() != wx.ID_CANCEL:
chosen_file = fileDialog.GetPath()
self.func(chosen_file)
class TopLevelPickButton(PickButton):
“”" Permet de choisir un fichier et d’ouvrir une toplevel “”"
def __init__(self, parent, wildcard, **kwargs):
super().__init__(parent, wildcard, self.create_toplevel, **kwargs)
def create_toplevel(self, file_name):
""" Ouvre une toplevel et affiche le graphique """
self.win = TopLevelCanvas(self.Parent)
self.win.canvas_panel.load_from_file(file_name)
self.win.Show()
class CanvasPanel(wx.Panel):
“”" Panel du graphique matplotlib “”"
def init(self, parent , size=(200,250)):
super().init(parent)
self.figure = Figure(figsize =(8,7))
self.canvas = FigureCanvas(self, -1, self.figure)
self.Size = self.canvas.Size
def load_from_file(self, file_name):
"""
Méthode effectuant l'intermédiaire pour charger le fichier selon
son type
"""
self.axes = self.figure.add_subplot(111)
if file_name.endswith(".nc"):
self._load_nc(file_name)
else:
self._load_txt(file_name)
self.canvas.draw()
def _load_nc(self, file_name):
""" Simule le chargement et affichage à partir d'un fichier nc """
t = np.arange(0.0, 8.0, 0.01)
s = np.sin(3 * np.pi * t)
self.axes.plot(t, s)
RS = RectangleSelector(self.axes, line_select_callback,
drawtype='box', useblit=True,
button=[1],
minspanx=5, minspany=5,
spancoords='pixels',
interactive=True)
self.RS = RectangleSelector(self.axes,line_select_callback,
drawtype='box', useblit=False,
button=[1, 3],minspanx=5, minspany=5,
spancoords='pixels',
interactive=True, rectprops = dict(facecolor='None',edgecolor='red',alpha=5,fill=False))
self.RS.to_draw.set_visible(True)
self.RS.extents = (0,1,0,1)
self.figure.canvas.draw()
class TopLevelCanvas(wx.Frame):
“”" Fenêtre affichant uniquement un graph matplotlib “”"
def __init__(self, parent, **kwargs):
super().__init__(parent, **kwargs)
self.canvas_panel = CanvasPanel(self)
self.Size = self.canvas_panel.Size
class App(wx.App):
def OnInit(self):
win = Window(title=“A test dialog”, size=(1000, 800))
win.Show()
return True
if name == “main”:
app = App()
app.MainLoop()
``
thank you
Majda