class widget_mfi_colat_plot(QWidget):
#-----------------------------------------------------------------------
# DEFINE THE INITIALIZATION FUNCTION.
#-----------------------------------------------------------------------
def __init__(self, core):
# Inherit all attributes of an instance of "QWidget".
super(widget_mfi_colat_plot, self).__init__()
# Store the Janus core.
self.core = core
# Prepare to respond to signals received from the core.
self.connect(self.core, SIGNAL('janus_rset'), self.resp_rset)
self.connect(self.core, SIGNAL('janus_chng_mfi'), self.resp_chng_mfi)
# Initialize this widget's instance of "PlotWidget", which will
# contain the plot of MFI magnetic field data.
# Note. The "QGridLayout" object given to this widget as its
# layout is essentially a dummy. I could have just had
# this class inherit "PlotWidget", but I think that this
# gives me a bit more control (and a similar structure
# "janus_widget_fc_cup").
self.setLayout(QGridLayout())
self.plt = PlotWidget()
self.layout().addWidget(self.plt)
self.layout().setContentsMargins(0, 0, 0, 0)
# Extract the individual elements of the "PlotWidget" object
# (e.g., it's axes) for more convenient access later.
self.vbx = self.plt.getViewBox()
self.axs_x = self.plt.getAxis('bottom')
self.axs_y = self.plt.getAxis('left')
self.ptm = self.plt.getPlotItem()
# Initialize and store the pens and fonts.
self.pen_vbx = mkPen(color='k')
self.pen_crv_colat = mkPen(color='#8B008B')
self.fnt = self.core.app.font()
# Configure the plot: disable automatic adjustments and
# adjustments made by the user, change the background and
# foreground colors, enable grid lines for both axes, label the
# axes, adjust the tick font size, adjust the "AxisItem" sizes,
# and add a margin around the entire plot.
self.plt.disableAutoRange()
self.plt.setMouseEnabled(False, False)
self.plt.setMenuEnabled(False)
self.plt.hideButtons()
self.plt.setBackground('w')
setConfigOption('foreground', 'k')
#####self.plt.showGrid( True, True )
labelStyle = {'color': 'k'}
self.axs_x.setLabel('Time [s]', **labelStyle)
self.axs_y.setLabel('Colat. [deg]', **labelStyle)
self.axs_x.label.setFont(self.fnt)
self.axs_y.label.setFont(self.fnt)
self.axs_x.setTickFont(self.fnt)
self.axs_y.setTickFont(self.fnt)
self.axs_x.setHeight(35)
self.axs_y.setWidth(40)
self.vbx.border = self.pen_vbx
self.ptm.setContentsMargins(5, 5, 5, 5)
# Initialize the curves that will be added to this plot.
self.crv_colat = None
# Populate this plot and adjust it's settings.
self.make_plt()
#-----------------------------------------------------------------------
# DEFINE THE FUNCTION FOR POPULATING THE PLOT.
#-----------------------------------------------------------------------
def make_plt(self):
# Reset the plot (i.e., remove all plot elements).
self.rset_plt()
# Establish the ranges of its time and magnetic field values.
# If the core contains no data or only a single datum,
# improvise (for the purpose of later establishing axis limits).
if (self.core.n_mfi >= 1):
# Establish the domain of the plot.
t_min = min(amin(self.core.mfi_s), 0.)
t_max = max(amax(self.core.mfi_s), self.core.fc_spec['dur'])
# Establish the range of the plot. As part of this,
# ensure that the range satisfies a minimum size and has
# sufficient padding.
ang_max = max(self.core.mfi_b_colat)
ang_min = min(self.core.mfi_b_colat)
ang_max = 5. + ang_max
ang_min = -5. + ang_min
d_t_0 = t_max - t_min
d_t = max(1.5 + d_t_0, 3.)
t_max = t_min + d_t
else:
t_min = 0.001
t_max = 3.500
ang_min = -90
ang_max = 90
# Set the range of the axis of each plot.
self.plt.setXRange(t_min, t_max, padding=0.0)
self.plt.setYRange(ang_min, ang_max, padding=0.0)
# If the core contains no Wind/MFI magnetic field data, return.
if (self.core.n_mfi <= 0):
return
# Generate and display each curve for the plot.
self.crv_colat = PlotDataItem(self.core.mfi_s,
self.core.mfi_b_colat,
pen=self.pen_crv_colat)
self.plt.addItem(self.crv_colat)
#-----------------------------------------------------------------------
# DEFINE THE FUNCTION FOR RESETTING THIS PLOT (CLEARING ALL ELEMENTS).
#-----------------------------------------------------------------------
def rset_plt(self):
# Hide and remove each of this plot's elements.
if (self.crv_colat is not None):
self.plt.removeItem(self.crv_colat)
# Permanently delete this plot's elements by setting each of the
# variables that store them to "None".
self.crv_colat = None
#-----------------------------------------------------------------------
# DEFINE THE FUNCTION FOR RESPONDING TO THE "rset" SIGNAL.
#-----------------------------------------------------------------------
def resp_rset(self):
# Reset the plot.
self.rset_plt()
#-----------------------------------------------------------------------
# DEFINE THE FUNCTION FOR RESPONDING TO THE "chng_mfi" SIGNAL.
#-----------------------------------------------------------------------
def resp_chng_mfi(self):
# Regenerate the plot.
self.make_plt()
