pyqtgraph_data_plot.py
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00001 #!/usr/bin/env python
00002 
00003 # Copyright (c) 2011, Dorian Scholz
00004 # All rights reserved.
00005 #
00006 # Redistribution and use in source and binary forms, with or without
00007 # modification, are permitted provided that the following conditions
00008 # are met:
00009 #
00010 #   * Redistributions of source code must retain the above copyright
00011 #     notice, this list of conditions and the following disclaimer.
00012 #   * Redistributions in binary form must reproduce the above
00013 #     copyright notice, this list of conditions and the following
00014 #     disclaimer in the documentation and/or other materials provided
00015 #     with the distribution.
00016 #   * Neither the name of the TU Darmstadt nor the names of its
00017 #     contributors may be used to endorse or promote products derived
00018 #     from this software without specific prior written permission.
00019 #
00020 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00021 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00022 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00023 # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
00024 # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00025 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00026 # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00027 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00028 # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00029 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
00030 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00031 # POSSIBILITY OF SUCH DAMAGE.
00032 
00033 from python_qt_binding.QtCore import Slot, Qt, qWarning, Signal
00034 from python_qt_binding.QtGui import QColor, QVBoxLayout, QWidget
00035 
00036 from pyqtgraph import PlotWidget, mkPen, mkBrush
00037 import numpy
00038 
00039 
00040 class PyQtGraphDataPlot(QWidget):
00041 
00042     limits_changed = Signal()
00043 
00044     def __init__(self, parent=None):
00045         super(PyQtGraphDataPlot, self).__init__(parent)
00046         self._plot_widget = PlotWidget()
00047         self._plot_widget.getPlotItem().addLegend()
00048         self._plot_widget.setBackground((255, 255, 255))
00049         self._plot_widget.setXRange(0, 10, padding=0)
00050         vbox = QVBoxLayout()
00051         vbox.addWidget(self._plot_widget)
00052         self.setLayout(vbox)
00053         self._plot_widget.getPlotItem().sigRangeChanged.connect(self.limits_changed)
00054 
00055         self._curves = {}
00056         self._current_vline = None
00057 
00058     def add_curve(self, curve_id, curve_name, curve_color=QColor(Qt.blue), markers_on=False):
00059         pen = mkPen(curve_color, width=1)
00060         symbol = "o"
00061         symbolPen = mkPen(QColor(Qt.black))
00062         symbolBrush = mkBrush(curve_color)
00063         # this adds the item to the plot and legend
00064         if markers_on:
00065             plot = self._plot_widget.plot(name=curve_name, pen=pen, symbol=symbol, symbolPen=symbolPen, symbolBrush=symbolBrush, symbolSize=4)
00066         else:
00067             plot = self._plot_widget.plot(name=curve_name, pen=pen)
00068         self._curves[curve_id] = plot
00069 
00070     def remove_curve(self, curve_id):
00071         curve_id = str(curve_id)
00072         if curve_id in self._curves:
00073             self._plot_widget.removeItem(self._curves[curve_id])
00074             del self._curves[curve_id]
00075             self._update_legend()
00076            
00077     def _update_legend(self):
00078         # clear and rebuild legend (there is no remove item method for the legend...)
00079         self._plot_widget.clear()
00080         self._plot_widget.getPlotItem().legend.items = []
00081         for curve in self._curves.values():
00082             self._plot_widget.addItem(curve)
00083         if self._current_vline:
00084             self._plot_widget.addItem(self._current_vline)
00085  
00086     def redraw(self):
00087         pass
00088 
00089     def set_values(self, curve_id, data_x, data_y):
00090         curve = self._curves[curve_id]
00091         curve.setData(data_x, data_y)
00092 
00093     def vline(self, x, color):
00094         if self._current_vline:
00095             self._plot_widget.removeItem(self._current_vline)
00096         self._current_vline = self._plot_widget.addLine(x=x, pen=color)
00097 
00098     def set_xlim(self, limits):
00099         # TODO: this doesn't seem to handle fast updates well
00100         self._plot_widget.setXRange(limits[0], limits[1], padding=0)
00101 
00102     def set_ylim(self, limits):
00103         self._plot_widget.setYRange(limits[0], limits[1], padding=0)
00104 
00105     def get_xlim(self):
00106         x_range, _ = self._plot_widget.viewRange()
00107         return x_range
00108 
00109     def get_ylim(self):
00110         _, y_range = self._plot_widget.viewRange()
00111         return y_range


rqt_plot
Author(s): Dorian Scholz
autogenerated on Mon Oct 6 2014 07:15:32