Dear All,
I am new to matplotlib and playing around with it. I am interested in
embedding in Qt, displaying TeX within such a window and finally
save the plot as postscript.
So I modified the embedding_in_qt example and added at the beginning
rc('text', usetex=True)
to prepare for TeX
and modified the (according agg_oo example):
def compute_initial_figure(self):
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)
self.axes.set_ylabel(r"\TeX\ is Number
$\displaystyle\sum_{n=1}^\infty\frac{-e^{i\pi}}{2^n}$!", fontsize=16,
color='r')
self.axes.set_xlabel("label")
self.axes.plot(t, s)
#self.print_figure("test.eps")
function, to create labels (with TeX) but they are not displayed.
Additionally if I include self.print_figure("test.eps")
File "embedding_in_qt.py", line 67, in compute_initial_figure
self.print_figure("test.eps")
File
"D:\APPS\PYTON2~1\Lib\site-packages\matplotlib\backends\backend_qtagg.py",
line 159, in print_figure
agg = self.switch_backends( FigureCanvasAgg )
File
"D:\APPS\PYTON2~1\Lib\site-packages\matplotlib\backend_bases.py", line
944, in switch_backends
newCanvas = FigureCanvasClass(self.figure)
AttributeError: figure
I am on WindowsXP, python 2.3.5 and matplotlib 0.87.6
The complete example is below.
Thank you very much
gerhard
import sys, os, random
from qt import *
from matplotlib import rc
from matplotlib.numerix import arange, sin, pi
from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg as
FigureCanvas
from matplotlib.figure import Figure
rc('text', usetex=True)
# This seems to be what PyQt expects, according to the examples shipped in
# its distribution.
TRUE = 1
FALSE = 0
progname = os.path.basename(sys.argv[0])
progversion = "0.1"
# Note: color-intensive applications may require a different color
allocation
# strategy.
QApplication.setColorSpec(QApplication.NormalColor)
app = QApplication(sys.argv)
class MyMplCanvas(FigureCanvas):
"""Ultimately, this is a QWidget (as well as a FigureCanvasAgg,
etc.)."""
def __init__(self, parent=None, width=5, height=4, dpi=100):
self.fig = Figure(figsize=(width, height), dpi=dpi)
self.axes = self.fig.add_subplot(111)
# We want the axes cleared every time plot() is called
self.axes.hold(False)
self.compute_initial_figure()
FigureCanvas.__init__(self, self.fig)
self.reparent(parent, QPoint(0, 0))
FigureCanvas.setSizePolicy(self,
QSizePolicy.Expanding,
QSizePolicy.Expanding)
FigureCanvas.updateGeometry(self)
def sizeHint(self):
w, h = self.get_width_height()
return QSize(w, h)
def minimumSizeHint(self):
return QSize(10, 10)
def compute_initial_figure(self):
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)
self.axes.set_ylabel(r"\TeX\ is Number
$\displaystyle\sum_{n=1}^\infty\frac{-e^{i\pi}}{2^n}$!", fontsize=16,
color='r')
self.axes.set_xlabel("label")
self.axes.plot(t, s)
#self.print_figure("test.eps")
class ApplicationWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self, None,
"application main window",
Qt.WType_TopLevel | Qt.WDestructiveClose)
self.file_menu = QPopupMenu(self)
self.file_menu.insertItem('&Quit', self.fileQuit, Qt.CTRL +
Qt.Key_Q)
self.menuBar().insertItem('&File', self.file_menu)
self.help_menu = QPopupMenu(self)
self.menuBar().insertSeparator()
self.menuBar().insertItem('&Help', self.help_menu)
self.help_menu.insertItem('&About', self.about)
self.main_widget = QWidget(self, "Main widget")
l = QVBoxLayout(self.main_widget)
sc = MyMplCanvas(self.main_widget, width=5, height=4, dpi=100)
l.addWidget(sc)
self.main_widget.setFocus()
self.setCentralWidget(self.main_widget)
self.statusBar().message("All hail matplotlib!", 2000)
def fileQuit(self):
qApp.exit(0)
def closeEvent(self, ce):
self.fileQuit()
def about(self):
QMessageBox.about(self, "About %s" % progname,
u"""%(prog)s version %(version)s
Copyright \N{COPYRIGHT SIGN} 2005 Florent Rougon
This program is a simple example of a Qt application embedding matplotlib
canvases.
It may be used and modified with no restriction; raw copies as well as
modified versions may be distributed without limitation."""
% {"prog": progname, "version": progversion})
def main():
aw = ApplicationWindow()
aw.setCaption("%s" % progname)
qApp.setMainWidget(aw)
aw.show()
sys.exit(qApp.exec_loop())
if __name__ == "__main__": main()
--
Gerhard Spitzlsperger
Renesas Semiconductor Europe (Landshut) GmbH
Senior Advisor Process
Jenaer Strasse 1
Germany 84034 Landshut
Tel +(49) 871 684 342
Fax +(49) 871 684 150
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