Hi,
I am trying to generate key press events in matplotlib (imshow) embedded
in pyqt4, but I am getting nowhere. My code is given below. Even though
the imshow seems to work OK, there is no response when I press keys.
I am using an mpl_connect
self.canvas.mpl_connect('key_press_event', self.on_key_press)
and define a function on_key_press:
def on_key_press(self, event):
print 'you pressed', event.key
The complete code is given below. I hope someone will show me where I
am going wrong. I am running this on Ubuntu, with python 2.6.x and
matplotlib 1.1.0.
Thanks for your help!
Saurav
==code begins==
import sys
import numpy as np
from matplotlib.figure import Figure
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as
FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg
as NavigationToolbar
class AppForm(QMainWindow):
def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.data = self.get_data2()
self.create_main_frame()
self.on_draw()
def create_main_frame(self):
self.main_frame = QWidget()
self.fig = Figure((5.0, 4.0), dpi=100)
self.canvas = FigureCanvas(self.fig)
self.canvas.setParent(self.main_frame)
self.mpl_toolbar = NavigationToolbar(self.canvas, self.main_frame)
self.canvas.mpl_connect('key_press_event', self.on_key_press)
vbox = QVBoxLayout()
vbox.addWidget(self.canvas) # the matplotlib canvas
vbox.addWidget(self.mpl_toolbar)
self.main_frame.setLayout(vbox)
self.setCentralWidget(self.main_frame)
def get_data2(self):
return np.arange(20).reshape([4,5]).copy()
def on_draw(self):
self.fig.clear()
self.axes = self.fig.add_subplot(111)
#self.axes.plot(self.x, self.y, 'ro')
self.axes.imshow(self.data, interpolation='nearest')
self.canvas.draw()
def on_key_press(self, event):
print 'you pressed', event.key
def main():
app = QApplication(sys.argv)
form = AppForm()
form.show()
app.exec_()
if __name__ == "__main__":
main()
==code ends==
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