qdsfit/MatplotlibWidget.py

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# -*- coding: utf-8 -*-
#
# Copyright © 2009 Pierre Raybaut
# Licensed under the terms of the MIT License
"""
MatplotlibWidget
================
Example of matplotlib widget for PyQt4
Copyright © 2009 Pierre Raybaut
This software is licensed under the terms of the MIT License
Derived from 'embedding_in_pyqt4.py':
Copyright © 2005 Florent Rougon, 2006 Darren Dale
"""
from QDSToolbar import CustomToolbar
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__version__ = "1.0.0"
from PyQt4.QtGui import QSizePolicy, QWidget, QVBoxLayout
from PyQt4.QtCore import QSize, Qt
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from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as Canvas
from matplotlib.figure import Figure
from matplotlib import rcParams
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rcParams['font.size'] = 9
class MatplotlibWidget(Canvas):
"""
MatplotlibWidget inherits PyQt4.QtGui.QWidget
and matplotlib.backend_bases.FigureCanvasBase
Options: option_name (default_value)
-------
parent (None): parent widget
title (''): figure title
xlabel (''): X-axis label
ylabel (''): Y-axis label
xlim (None): X-axis limits ([min, max])
ylim (None): Y-axis limits ([min, max])
xscale ('linear'): X-axis scale
yscale ('linear'): Y-axis scale
width (4): width in inches
height (3): height in inches
dpi (100): resolution in dpi
hold (False): if False, figure will be cleared each time plot is called
Widget attributes:
-----------------
figure: instance of matplotlib.figure.Figure
axes: figure axes
Example:
-------
self.widget = MatplotlibWidget(self, yscale='log', hold=True)
from numpy import linspace
x = linspace(-10, 10)
self.widget.axes.plot(x, x**2)
self.wdiget.axes.plot(x, x**3)
"""
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def __init__(self, parent=None, title='', xlabel='', ylabel='',
xlim=None, ylim=None, xscale='linear', yscale='linear',
width=6, height=4, dpi=100, hold=False):
self.figure = Figure(figsize=(width, height), dpi=dpi)
self.axes = self.figure.add_subplot(111)
self.axes.set_title(title)
self.axes.set_xlabel(xlabel)
self.axes.set_ylabel(ylabel)
if xscale is not None:
self.axes.set_xscale(xscale)
if yscale is not None:
self.axes.set_yscale(yscale)
if xlim is not None:
self.axes.set_xlim(*xlim)
if ylim is not None:
self.axes.set_ylim(*ylim)
self.axes.hold(hold)
Canvas.__init__(self, self.figure)
self.setParent(parent)
Canvas.setSizePolicy(self, QSizePolicy.Expanding, QSizePolicy.Expanding)
Canvas.updateGeometry(self)
def sizeHint(self):
w, h = self.get_width_height()
return QSize(w, h)
def minimumSizeHint(self):
return QSize(10, 10)
#===============================================================================
# Example
#===============================================================================
if __name__ == '__main__':
import sys
from PyQt4.QtGui import QMainWindow, QApplication
from numpy import linspace
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class ApplicationWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.mplwidget = MatplotlibWidget(self, title='Example',
xlabel='Linear scale',
ylabel='Log scale',
hold=True, yscale='log')
self.mplwidget.setFocus()
self.setCentralWidget(self.mplwidget)
self.plot(self.mplwidget.axes)
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def plot(self, axes):
x = linspace(-10, 10)
axes.plot(x, x ** 2)
axes.plot(x, x ** 3)
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app = QApplication(sys.argv)
win = ApplicationWindow()
win.show()
sys.exit(app.exec_())
class PlotWidget(QWidget):
def __init__(self, parent=None):
QWidget.__init__(self)
super(PlotWidget, self).__init__(parent)
self.mplwidget = MatplotlibWidget(hold=True,
xlim=(1e-2, 1e7),
xscale='log',
yscale='log')
self.canvas = self.mplwidget.figure.canvas # shortcut
self.canvas.axes.grid(True)
#self.bbox_size = self.canvas.axes.bbox.size
self.toolbar = CustomToolbar(self.canvas, self.mplwidget, parent)
self.toolbar.setToolButtonStyle(Qt.ToolButtonTextUnderIcon)
layout = QVBoxLayout(parent)
#self.mplwidget.setLayout(layout)
layout.addWidget(self.canvas)
layout.addWidget(self.mplwidget)
layout.addWidget(self.toolbar)
self._bg_cache = None
self._axvlims = []
self._axvname = []