Plotter.py @ 6b43c58

Last change on this file since 6b43c58 was e0ed8a8, checked in by Adam Washington <adam.washington@…>, 7 years ago
Draw Sesans data in linear coordinates
Property mode set to `100644`
File size: 24.4 KB

Rev	Line
[8cb6cd6]	1	from PyQt4 import QtGui
[aadf0af1]	2	from PyQt4 import QtCore
	3	import functools
	4	import copy
[8cb6cd6]	5	import matplotlib.pyplot as plt
[9290b1a]	6	from matplotlib.font_manager import FontProperties
[dc5ef15]	7	from sas.qtgui.Plotting.PlotterData import Data1D
[83eb5208]	8	from sas.qtgui.Plotting.PlotterBase import PlotterBase
	9	from sas.qtgui.Plotting.AddText import AddText
	10	from sas.qtgui.Plotting.SetGraphRange import SetGraphRange
	11	from sas.qtgui.Plotting.LinearFit import LinearFit
	12	from sas.qtgui.Plotting.PlotProperties import PlotProperties
[dc5ef15]	13
	14	import sas.qtgui.Utilities.GuiUtils as GuiUtils
[83eb5208]	15	import sas.qtgui.Plotting.PlotUtilities as PlotUtilities
[8cb6cd6]	16
[416fa8f]	17	class PlotterWidget(PlotterBase):
[c4e5400]	18	"""
	19	1D Plot widget for use with a QDialog
[fecfe28]	20	"""
[416fa8f]	21	def __init__(self, parent=None, manager=None, quickplot=False):
	22	super(PlotterWidget, self).__init__(parent, manager=manager, quickplot=quickplot)
[570a58f9]	23
[27313b7]	24	self.parent = parent
[8cb6cd6]	25
[aadf0af1]	26	# Dictionary of {plot_id:Data1d}
	27	self.plot_dict = {}
	28
[fed94a2]	29	# Window for text add
	30	self.addText = AddText(self)
[aadf0af1]	31
[fed94a2]	32	# Log-ness of the axes
[570a58f9]	33	self.xLogLabel = "log10(x)"
	34	self.yLogLabel = "log10(y)"
	35
	36	# Data container for the linear fit
[fed94a2]	37	self.fit_result = Data1D(x=[], y=[], dy=None)
	38	self.fit_result.symbol = 13
	39	self.fit_result.name = "Fit"
[570a58f9]	40
	41	# Add a slot for receiving update signal from LinearFit
[fed94a2]	42	# NEW style signals
[570a58f9]	43	#self.updatePlot = QtCore.pyqtSignal(tuple)
[fed94a2]	44	# self.updatePlot.connect(self.onFitDisplay)
	45	# OLD style signals
[570a58f9]	46	QtCore.QObject.connect(self, QtCore.SIGNAL('updatePlot'), self.onFitDisplay)
	47
[31c5b58]	48	@property
	49	def data(self):
	50	return self._data
	51
	52	@data.setter
	53	def data(self, value):
[8cb6cd6]	54	""" data setter """
[31c5b58]	55	self._data = value
[6d05e1d]	56	self.xLabel = "%s(%s)"%(value._xaxis, value._xunit)
	57	self.yLabel = "%s(%s)"%(value._yaxis, value._yunit)
[e0ed8a8]	58	if value.isSesans:
	59	self.xscale = 'linear'
	60	self.yscale = 'linear'
[aadf0af1]	61	self.title(title=value.name)
[8cb6cd6]	62
[f0bb711]	63	def plot(self, data=None, color=None, marker=None, hide_error=False):
[8cb6cd6]	64	"""
[aadf0af1]	65	Add a new plot of self._data to the chart.
[8cb6cd6]	66	"""
[9290b1a]	67	# Data1D
	68	if isinstance(data, Data1D):
	69	self.data = data
	70	assert(self._data)
	71
[87cc73a]	72	is_fit = (self.data.id=="fit")
[570a58f9]	73
[f182f93]	74	# Transform data if required.
	75	# TODO: it properly!
	76	#if data.xtransform is not None or data.ytransform is not None:
	77	# a, b, c, d = GuiUtils.xyTransform(self.data, self.data.xtransform, self.data.ytransform)
	78
[87cc73a]	79	# Shortcuts
[ef01be4]	80	ax = self.ax
[87cc73a]	81	x = self._data.view.x
	82	y = self._data.view.y
	83
	84	# Marker symbol. Passed marker is one of matplotlib.markers characters
	85	# Alternatively, picked up from Data1D as an int index of PlotUtilities.SHAPES dict
	86	if marker is None:
	87	marker = self.data.symbol
[6fd4e36]	88	# Try name first
	89	try:
	90	marker = PlotUtilities.SHAPES[marker]
	91	except KeyError:
	92	marker = PlotUtilities.SHAPES.values()[marker]
[87cc73a]	93
[6fd4e36]	94	assert marker is not None
[87cc73a]	95	# Plot name
[b789967]	96	if self.data.title:
	97	self.title(title=self.data.title)
	98	else:
	99	self.title(title=self.data.name)
[87cc73a]	100
	101	# Error marker toggle
	102	if hide_error is None:
	103	hide_error = self.data.hide_error
	104
	105	# Plot color
	106	if color is None:
	107	color = self.data.custom_color
	108
	109	color = PlotUtilities.getValidColor(color)
	110
	111	markersize = self._data.markersize
	112
[239214f]	113	# Draw non-standard markers
	114	l_width = markersize * 0.4
	115	if marker == '-' or marker == '--':
	116	line = self.ax.plot(x, y, color=color, lw=l_width, marker='',
	117	linestyle=marker, label=self._title, zorder=10)[0]
	118
	119	elif marker == 'vline':
	120	y_min = min(y)*9.0/10.0 if min(y) < 0 else 0.0
	121	line = self.ax.vlines(x=x, ymin=y_min, ymax=y, color=color,
	122	linestyle='-', label=self._title, lw=l_width, zorder=1)
	123
	124	elif marker == 'step':
	125	line = self.ax.step(x, y, color=color, marker='', linestyle='-',
	126	label=self._title, lw=l_width, zorder=1)[0]
[8cb6cd6]	127
[c4e5400]	128	else:
[87cc73a]	129	# plot data with/without errorbars
	130	if hide_error:
	131	line = ax.plot(x, y, marker=marker, color=color, markersize=markersize,
	132	linestyle='', label=self._title, picker=True)
	133	else:
	134	line = ax.errorbar(x, y,
	135	yerr=self._data.view.dy, xerr=None,
	136	capsize=2, linestyle='',
	137	barsabove=False,
	138	color=color,
	139	marker=marker,
	140	markersize=markersize,
	141	lolims=False, uplims=False,
	142	xlolims=False, xuplims=False,
	143	label=self._title,
	144	picker=True)
[8cb6cd6]	145
[aadf0af1]	146	# Update the list of data sets (plots) in chart
	147	self.plot_dict[self._data.id] = self.data
	148
[8cb6cd6]	149	# Now add the legend with some customizations.
[f0bb711]	150
	151	self.legend = ax.legend(loc='upper right', shadow=True)
	152	if self.legend:
	153	self.legend.set_picker(True)
[8cb6cd6]	154
[6d05e1d]	155	# Current labels for axes
[570a58f9]	156	if self.y_label and not is_fit:
	157	ax.set_ylabel(self.y_label)
	158	if self.x_label and not is_fit:
	159	ax.set_xlabel(self.x_label)
[6d05e1d]	160
	161	# Include scaling (log vs. linear)
	162	ax.set_xscale(self.xscale)
[3b7b218]	163	ax.set_yscale(self.yscale)
[8cb6cd6]	164
[257bd57]	165	# define the ranges
	166	self.setRange = SetGraphRange(parent=self,
	167	x_range=self.ax.get_xlim(), y_range=self.ax.get_ylim())
	168
[8cb6cd6]	169	# refresh canvas
	170	self.canvas.draw()
	171
[aadf0af1]	172	def createContextMenu(self):
[c4e5400]	173	"""
	174	Define common context menu and associated actions for the MPL widget
	175	"""
	176	self.defaultContextMenu()
	177
[aadf0af1]	178	# Separate plots
	179	self.addPlotsToContextMenu()
	180
[27313b7]	181	# Additional menu items
	182	self.contextMenu.addSeparator()
	183	self.actionAddText = self.contextMenu.addAction("Add Text")
	184	self.actionRemoveText = self.contextMenu.addAction("Remove Text")
	185	self.contextMenu.addSeparator()
	186	self.actionChangeScale = self.contextMenu.addAction("Change Scale")
	187	self.contextMenu.addSeparator()
	188	self.actionSetGraphRange = self.contextMenu.addAction("Set Graph Range")
	189	self.actionResetGraphRange =\
	190	self.contextMenu.addAction("Reset Graph Range")
	191	# Add the title change for dialogs
[aadf0af1]	192	#if self.parent:
	193	self.contextMenu.addSeparator()
	194	self.actionWindowTitle = self.contextMenu.addAction("Window Title")
[27313b7]	195
	196	# Define the callbacks
	197	self.actionAddText.triggered.connect(self.onAddText)
	198	self.actionRemoveText.triggered.connect(self.onRemoveText)
	199	self.actionChangeScale.triggered.connect(self.onScaleChange)
	200	self.actionSetGraphRange.triggered.connect(self.onSetGraphRange)
	201	self.actionResetGraphRange.triggered.connect(self.onResetGraphRange)
	202	self.actionWindowTitle.triggered.connect(self.onWindowsTitle)
[c4e5400]	203
[aadf0af1]	204	def addPlotsToContextMenu(self):
	205	"""
	206	Adds operations on all plotted sets of data to the context menu
	207	"""
	208	for id in self.plot_dict.keys():
	209	plot = self.plot_dict[id]
[b789967]	210
	211	name = plot.name if plot.name else plot.title
[aadf0af1]	212	plot_menu = self.contextMenu.addMenu('&%s' % name)
	213
	214	self.actionDataInfo = plot_menu.addAction("&DataInfo")
	215	self.actionDataInfo.triggered.connect(
	216	functools.partial(self.onDataInfo, plot))
	217
	218	self.actionSavePointsAsFile = plot_menu.addAction("&Save Points as a File")
	219	self.actionSavePointsAsFile.triggered.connect(
	220	functools.partial(self.onSavePoints, plot))
	221	plot_menu.addSeparator()
	222
	223	if plot.id != 'fit':
	224	self.actionLinearFit = plot_menu.addAction('&Linear Fit')
[570a58f9]	225	self.actionLinearFit.triggered.connect(
	226	functools.partial(self.onLinearFit, id))
[aadf0af1]	227	plot_menu.addSeparator()
	228
	229	self.actionRemovePlot = plot_menu.addAction("Remove")
	230	self.actionRemovePlot.triggered.connect(
	231	functools.partial(self.onRemovePlot, id))
	232
	233	if not plot.is_data:
	234	self.actionFreeze = plot_menu.addAction('&Freeze')
	235	self.actionFreeze.triggered.connect(
	236	functools.partial(self.onFreeze, id))
	237	plot_menu.addSeparator()
	238
	239	if plot.is_data:
	240	self.actionHideError = plot_menu.addAction("Hide Error Bar")
	241	if plot.dy is not None and plot.dy != []:
	242	if plot.hide_error:
	243	self.actionHideError.setText('Show Error Bar')
	244	else:
	245	self.actionHideError.setEnabled(False)
	246	self.actionHideError.triggered.connect(
	247	functools.partial(self.onToggleHideError, id))
	248	plot_menu.addSeparator()
	249
	250	self.actionModifyPlot = plot_menu.addAction('&Modify Plot Property')
[87cc73a]	251	self.actionModifyPlot.triggered.connect(
	252	functools.partial(self.onModifyPlot, id))
[aadf0af1]	253
	254	def createContextMenuQuick(self):
[6d05e1d]	255	"""
	256	Define context menu and associated actions for the quickplot MPL widget
	257	"""
[c4e5400]	258	# Default actions
	259	self.defaultContextMenu()
	260
	261	# Additional actions
[6d05e1d]	262	self.actionToggleGrid = self.contextMenu.addAction("Toggle Grid On/Off")
	263	self.contextMenu.addSeparator()
	264	self.actionChangeScale = self.contextMenu.addAction("Change Scale")
	265
	266	# Define the callbacks
	267	self.actionToggleGrid.triggered.connect(self.onGridToggle)
	268	self.actionChangeScale.triggered.connect(self.onScaleChange)
	269
	270	def onScaleChange(self):
	271	"""
	272	Show a dialog allowing axes rescaling
	273	"""
	274	if self.properties.exec_() == QtGui.QDialog.Accepted:
[570a58f9]	275	self.xLogLabel, self.yLogLabel = self.properties.getValues()
	276	self.xyTransform(self.xLogLabel, self.yLogLabel)
[6d05e1d]	277
[27313b7]	278	def onAddText(self):
	279	"""
	280	Show a dialog allowing adding custom text to the chart
	281	"""
[9290b1a]	282	if self.addText.exec_() == QtGui.QDialog.Accepted:
	283	# Retrieve the new text, its font and color
	284	extra_text = self.addText.text()
	285	extra_font = self.addText.font()
	286	extra_color = self.addText.color()
	287
	288	# Place the text on the screen at (0,0)
	289	pos_x = self.x_click
	290	pos_y = self.y_click
	291
	292	# Map QFont onto MPL font
	293	mpl_font = FontProperties()
	294	mpl_font.set_size(int(extra_font.pointSize()))
	295	mpl_font.set_family(str(extra_font.family()))
	296	mpl_font.set_weight(int(extra_font.weight()))
	297	# MPL style names
	298	styles = ['normal', 'italic', 'oblique']
	299	# QFont::Style maps directly onto the above
	300	try:
	301	mpl_font.set_style(styles[extra_font.style()])
	302	except:
	303	pass
	304
	305	if len(extra_text) > 0:
	306	new_text = self.ax.text(str(pos_x),
	307	str(pos_y),
	308	extra_text,
	309	color=extra_color,
	310	fontproperties=mpl_font)
	311	# Update the list of annotations
	312	self.textList.append(new_text)
	313	self.canvas.draw_idle()
[27313b7]	314
	315	def onRemoveText(self):
	316	"""
[9290b1a]	317	Remove the most recently added text
[27313b7]	318	"""
[d3ca363]	319	num_text = len(self.textList)
	320	if num_text < 1:
	321	return
	322	txt = self.textList[num_text - 1]
	323	text_remove = txt.get_text()
	324	txt.remove()
	325	self.textList.remove(txt)
	326
	327	self.canvas.draw_idle()
[27313b7]	328
	329	def onSetGraphRange(self):
	330	"""
	331	Show a dialog allowing setting the chart ranges
	332	"""
[d3ca363]	333	# min and max of data
	334	if self.setRange.exec_() == QtGui.QDialog.Accepted:
[257bd57]	335	x_range = self.setRange.xrange()
	336	y_range = self.setRange.yrange()
	337	if x_range is not None and y_range is not None:
	338	self.ax.set_xlim(x_range)
	339	self.ax.set_ylim(y_range)
	340	self.canvas.draw_idle()
[27313b7]	341
	342	def onResetGraphRange(self):
	343	"""
[d3ca363]	344	Resets the chart X and Y ranges to their original values
[27313b7]	345	"""
[d3ca363]	346	x_range = (self.data.x.min(), self.data.x.max())
	347	y_range = (self.data.y.min(), self.data.y.max())
[257bd57]	348	if x_range is not None and y_range is not None:
	349	self.ax.set_xlim(x_range)
	350	self.ax.set_ylim(y_range)
	351	self.canvas.draw_idle()
[27313b7]	352
[570a58f9]	353	def onLinearFit(self, id):
[aadf0af1]	354	"""
	355	Creates and displays a simple linear fit for the selected plot
	356	"""
[570a58f9]	357	selected_plot = self.plot_dict[id]
	358
	359	maxrange = (min(selected_plot.x), max(selected_plot.x))
	360	fitrange = self.ax.get_xlim()
	361
	362	fit_dialog = LinearFit(parent=self,
	363	data=selected_plot,
	364	max_range=maxrange,
	365	fit_range=fitrange,
	366	xlabel=self.xLogLabel,
	367	ylabel=self.yLogLabel)
	368	if fit_dialog.exec_() == QtGui.QDialog.Accepted:
	369	return
[aadf0af1]	370
[87cc73a]	371	def replacePlot(self, id, new_plot):
	372	"""
	373	Remove plot 'id' and add 'new_plot' to the chart.
	374	This effectlvely refreshes the chart with changes to one of its plots
	375	"""
	376	self.removePlot(id)
	377	self.plot(data=new_plot)
	378
[aadf0af1]	379	def onRemovePlot(self, id):
	380	"""
[570a58f9]	381	Responds to the plot delete action
	382	"""
	383	self.removePlot(id)
	384
	385	if len(self.plot_dict) == 0:
	386	# last plot: graph is empty must be the panel must be destroyed
	387	self.parent.close()
	388
	389	def removePlot(self, id):
	390	"""
[aadf0af1]	391	Deletes the selected plot from the chart
	392	"""
[fef38e8]	393	if id not in self.plot_dict.keys():
[570a58f9]	394	return
	395
[aadf0af1]	396	selected_plot = self.plot_dict[id]
	397
	398	plot_dict = copy.deepcopy(self.plot_dict)
	399
[b46f285]	400	# Labels might have been changed
	401	xl = self.ax.xaxis.label.get_text()
	402	yl = self.ax.yaxis.label.get_text()
	403
[aadf0af1]	404	self.plot_dict = {}
	405
	406	plt.cla()
	407	self.ax.cla()
	408
	409	for ids in plot_dict:
	410	if ids != id:
[b46f285]	411	self.plot(data=plot_dict[ids], hide_error=plot_dict[ids].hide_error)
	412
	413	# Reset the labels
	414	self.ax.set_xlabel(xl)
	415	self.ax.set_ylabel(yl)
	416	self.canvas.draw()
[aadf0af1]	417
	418	def onFreeze(self, id):
	419	"""
	420	Freezes the selected plot to a separate chart
	421	"""
	422	plot = self.plot_dict[id]
	423	self.manager.add_data(data_list=[plot])
	424
[87cc73a]	425	def onModifyPlot(self, id):
[aadf0af1]	426	"""
	427	Allows for MPL modifications to the selected plot
	428	"""
[87cc73a]	429	selected_plot = self.plot_dict[id]
	430
	431	# Old style color - single integer for enum color
	432	# New style color - #hhhhhh
	433	color = selected_plot.custom_color
	434	# marker symbol and size
	435	marker = selected_plot.symbol
	436	marker_size = selected_plot.markersize
	437	# plot name
	438	legend = selected_plot.title
	439
	440	plotPropertiesWidget = PlotProperties(self,
	441	color=color,
	442	marker=marker,
	443	marker_size=marker_size,
	444	legend=legend)
	445	if plotPropertiesWidget.exec_() == QtGui.QDialog.Accepted:
	446	# Update Data1d
[0f3c22d]	447	selected_plot.markersize = plotPropertiesWidget.markersize()
	448	selected_plot.custom_color = plotPropertiesWidget.color()
	449	selected_plot.symbol = plotPropertiesWidget.marker()
	450	selected_plot.title = plotPropertiesWidget.legend()
[87cc73a]	451
	452	# Redraw the plot
	453	self.replacePlot(id, selected_plot)
[aadf0af1]	454
	455	def onToggleHideError(self, id):
	456	"""
	457	Toggles hide error/show error menu item
	458	"""
	459	selected_plot = self.plot_dict[id]
	460	current = selected_plot.hide_error
	461
	462	# Flip the flag
	463	selected_plot.hide_error = not current
	464
	465	plot_dict = copy.deepcopy(self.plot_dict)
	466	self.plot_dict = {}
	467
	468	# Clean the canvas
	469	plt.cla()
	470	self.ax.cla()
	471
	472	# Recreate the plots but reverse the error flag for the current
	473	for ids in plot_dict:
	474	if ids == id:
	475	self.plot(data=plot_dict[ids], hide_error=(not current))
	476	else:
	477	self.plot(data=plot_dict[ids], hide_error=plot_dict[ids].hide_error)
	478
[6d05e1d]	479	def xyTransform(self, xLabel="", yLabel=""):
	480	"""
	481	Transforms x and y in View and set the scale
	482	"""
[570a58f9]	483	# Transform all the plots on the chart
	484	for id in self.plot_dict.keys():
	485	current_plot = self.plot_dict[id]
	486	if current_plot.id == "fit":
	487	self.removePlot(id)
	488	continue
[fed94a2]	489
[570a58f9]	490	new_xlabel, new_ylabel, xscale, yscale =\
	491	GuiUtils.xyTransform(current_plot, xLabel, yLabel)
	492	self.xscale = xscale
	493	self.yscale = yscale
[b46f285]	494
[570a58f9]	495	# Plot the updated chart
	496	self.removePlot(id)
[b46f285]	497
	498	# This assignment will wrap the label in Latex "$"
	499	self.xLabel = new_xlabel
	500	self.yLabel = new_ylabel
[a66ff280]	501	# Directly overwrite the data to avoid label reassignment
	502	self._data = current_plot
[87cc73a]	503	self.plot()
[570a58f9]	504
	505	pass # debug hook
	506
[fed94a2]	507	def onFitDisplay(self, fit_data):
	508	"""
	509	Add a linear fitting line to the chart
	510	"""
	511	# Create new data structure with fitting result
	512	tempx = fit_data[0]
	513	tempy = fit_data[1]
	514	self.fit_result.x = []
	515	self.fit_result.y = []
	516	self.fit_result.x = tempx
	517	self.fit_result.y = tempy
	518	self.fit_result.dx = None
	519	self.fit_result.dy = None
	520
	521	#Remove another Fit, if exists
	522	self.removePlot("fit")
	523
	524	self.fit_result.reset_view()
	525	#self.offset_graph()
	526
	527	# Set plot properties
	528	self.fit_result.id = 'fit'
	529	self.fit_result.title = 'Fit'
	530	self.fit_result.name = 'Fit'
	531
	532	# Plot the line
[87cc73a]	533	self.plot(data=self.fit_result, marker='-', hide_error=True)
[fed94a2]	534
[3bdbfcc]	535	def onMplMouseDown(self, event):
	536	"""
	537	Left button down and ready to drag
	538	"""
	539	# Check that the LEFT button was pressed
[0268aed]	540	if event.button != 1:
	541	return
	542
	543	self.leftdown = True
	544	for text in self.textList:
	545	if text.contains(event)[0]: # If user has clicked on text
	546	self.selectedText = text
	547	return
	548	if event.inaxes is None:
	549	return
	550	try:
	551	self.x_click = float(event.xdata) # / size_x
	552	self.y_click = float(event.ydata) # / size_y
	553	except:
	554	self.position = None
[3bdbfcc]	555
	556	def onMplMouseUp(self, event):
	557	"""
	558	Set the data coordinates of the click
	559	"""
	560	self.x_click = event.xdata
	561	self.y_click = event.ydata
	562
	563	# Check that the LEFT button was released
	564	if event.button == 1:
	565	self.leftdown = False
	566	self.selectedText = None
	567
	568	#release the legend
	569	if self.gotLegend == 1:
	570	self.gotLegend = 0
	571
	572	def onMplMouseMotion(self, event):
	573	"""
	574	Check if the left button is press and the mouse in moving.
	575	Compute delta for x and y coordinates and then perform the drag
	576	"""
	577	if self.gotLegend == 1 and self.leftdown:
	578	self.onLegendMotion(event)
	579	return
	580
[0268aed]	581	#if self.leftdown and self.selectedText is not None:
[9f25bce]	582	if not self.leftdown or self.selectedText is None:
[3bdbfcc]	583	return
[0268aed]	584	# User has clicked on text and is dragging
[9f25bce]	585	if event.inaxes is None:
[0268aed]	586	# User has dragged outside of axes
	587	self.selectedText = None
	588	else:
	589	# Only move text if mouse is within axes
	590	self.selectedText.set_position((event.xdata, event.ydata))
	591	self.canvas.draw_idle()
	592	return
[3bdbfcc]	593
	594	def onMplPick(self, event):
	595	"""
	596	On pick legend
	597	"""
	598	legend = self.legend
[0268aed]	599	if event.artist != legend:
	600	return
	601	# Get the box of the legend.
	602	bbox = self.legend.get_window_extent()
	603	# Get mouse coordinates at time of pick.
	604	self.mouse_x = event.mouseevent.x
	605	self.mouse_y = event.mouseevent.y
	606	# Get legend coordinates at time of pick.
	607	self.legend_x = bbox.xmin
	608	self.legend_y = bbox.ymin
	609	# Indicate we picked up the legend.
	610	self.gotLegend = 1
	611
	612	#self.legend.legendPatch.set_alpha(0.5)
[3bdbfcc]	613
	614	def onLegendMotion(self, event):
	615	"""
	616	On legend in motion
	617	"""
	618	ax = event.inaxes
	619	if ax == None:
	620	return
	621	# Event occurred inside a plotting area
	622	lo_x, hi_x = ax.get_xlim()
	623	lo_y, hi_y = ax.get_ylim()
	624	# How much the mouse moved.
	625	x = mouse_diff_x = self.mouse_x - event.x
	626	y = mouse_diff_y = self.mouse_y - event.y
	627	# Put back inside
	628	if x < lo_x:
	629	x = lo_x
	630	if x > hi_x:
	631	x = hi_x
	632	if y < lo_y:
	633	y = lo_y
	634	if y > hi_y:
	635	y = hi_y
	636	# Move the legend from its previous location by that same amount
	637	loc_in_canvas = self.legend_x - mouse_diff_x, \
	638	self.legend_y - mouse_diff_y
	639	# Transform into legend coordinate system
	640	trans_axes = self.legend.parent.transAxes.inverted()
	641	loc_in_norm_axes = trans_axes.transform_point(loc_in_canvas)
	642	self.legend_pos_loc = tuple(loc_in_norm_axes)
	643	self.legend._loc = self.legend_pos_loc
	644	# self.canvas.draw()
	645	self.canvas.draw_idle()
	646
	647	def onMplWheel(self, event):
	648	"""
	649	Process mouse wheel as zoom events
	650	"""
	651	ax = event.inaxes
	652	step = event.step
	653
	654	if ax != None:
	655	# Event occurred inside a plotting area
	656	lo, hi = ax.get_xlim()
	657	lo, hi = PlotUtilities.rescale(lo, hi, step,
	658	pt=event.xdata, scale=ax.get_xscale())
	659	if not self.xscale == 'log' or lo > 0:
	660	self._scale_xlo = lo
	661	self._scale_xhi = hi
	662	ax.set_xlim((lo, hi))
	663
	664	lo, hi = ax.get_ylim()
	665	lo, hi = PlotUtilities.rescale(lo, hi, step, pt=event.ydata,
	666	scale=ax.get_yscale())
	667	if not self.yscale == 'log' or lo > 0:
	668	self._scale_ylo = lo
	669	self._scale_yhi = hi
	670	ax.set_ylim((lo, hi))
	671	else:
	672	# Check if zoom happens in the axes
	673	xdata, ydata = None, None
	674	x, y = event.x, event.y
	675
	676	for ax in self.axes:
	677	insidex, _ = ax.xaxis.contains(event)
	678	if insidex:
	679	xdata, _ = ax.transAxes.inverted().transform_point((x, y))
	680	insidey, _ = ax.yaxis.contains(event)
	681	if insidey:
	682	_, ydata = ax.transAxes.inverted().transform_point((x, y))
	683	if xdata is not None:
	684	lo, hi = ax.get_xlim()
	685	lo, hi = PlotUtilities.rescale(lo, hi, step,
	686	bal=xdata, scale=ax.get_xscale())
	687	if not self.xscale == 'log' or lo > 0:
	688	self._scale_xlo = lo
	689	self._scale_xhi = hi
	690	ax.set_xlim((lo, hi))
	691	if ydata is not None:
	692	lo, hi = ax.get_ylim()
	693	lo, hi = PlotUtilities.rescale(lo, hi, step, bal=ydata,
	694	scale=ax.get_yscale())
	695	if not self.yscale == 'log' or lo > 0:
	696	self._scale_ylo = lo
	697	self._scale_yhi = hi
	698	ax.set_ylim((lo, hi))
	699	self.canvas.draw_idle()
	700
[c4e5400]	701
[416fa8f]	702	class Plotter(QtGui.QDialog, PlotterWidget):
	703	def __init__(self, parent=None, quickplot=False):
	704
	705	QtGui.QDialog.__init__(self)
[aadf0af1]	706	PlotterWidget.__init__(self, parent=self, manager=parent, quickplot=quickplot)
[c4e5400]	707	icon = QtGui.QIcon()
	708	icon.addPixmap(QtGui.QPixmap(":/res/ball.ico"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
	709	self.setWindowIcon(icon)
	710
[416fa8f]	711

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SasView

source: sasview/src/sas/qtgui/Plotting/Plotter.py @ 6b43c58

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