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widgets.py
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widgets.py
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import warnings
import time
from PyQt4 import Qt
import pyqtgraph as pg
import pyqtgraph.opengl as gl
import pyqtgraph.dockarea
import numpy as np
from window import WindowMultiPlot
class MyDockArea(pg.dockarea.DockArea):
def __init__(self, *args, **kwargs):
pg.dockarea.DockArea.__init__(self, *args, **kwargs)
self.insert_location = 'bottom'
self.last_dock, self.second_last_dock = None, None
self._docks = {}
self.max_plot_count = 4
self.update_log = []
def remove_dock(self, dock):
dock.setParent(None)
dock.label.setParent(None)
if not isinstance(dock, ItemWidget):
return
dock.label.hide()
if len(dock._container.children()) is 0 and dock._container is not self.topContainer:
dock._container.setParent(None)
if self.insert_location == 'bottom':
if dock is self.last_dock:
self.last_dock = self.second_last_dock
self.insert_location = 'right'
elif dock is self.second_last_dock:
self.insert_location = 'right'
elif dock is self.last_dock:
self.insert_location = 'bottom'
if isinstance(dock, Rank2ItemWidget):
if dock.img_view.cross_section_enabled:
dock.img_view.hide_cross_section()
self._docks.pop(dock.ident)
dock.window_item.update_tree_item(visible=False)
def set_max_plots(self, n):
self.max_plot_count = n
def add_dock_auto_location(self, dock):
self._docks[dock.ident] = dock
if not dock.label.isVisible():
dock.label.show()
dock.timestamp = time.time()
while len(self._docks) > self.max_plot_count:
least_recently_edited = sorted(self._docks.values(), key=lambda d: d.timestamp)[0]
self.remove_dock(least_recently_edited)
if self.insert_location == 'right':
self.addDock(dock, self.insert_location, self.last_dock)
else:
self.addDock(dock, self.insert_location)
self.insert_location = {'bottom':'right', 'right':'bottom'}[self.insert_location]
self.second_last_dock, self.last_dock = self.last_dock, dock
def hide_all_but(self, dock):
for d in self._docks.values():
if d is not dock:
self.remove_dock(d)
class NodeEditWidget(Qt.QFrame):
def __init__(self, path, attrs):
Qt.QFrame.__init__(self)
self.setFrameStyle(Qt.QFrame.Panel)
self.path = path
self.spin_widgets = {}
self.proxy = None
self.setLayout(Qt.QVBoxLayout())
self.layout().addWidget(Qt.QLabel('Editing ' + '/'.join(self.path)))
self.attr_list = Qt.QTreeWidget()
self.attr_list.setRootIsDecorated(False)
self.attr_list.setColumnCount(2)
self.attr_list.setHeaderLabels(['Name', 'Value', 'Type'])
for attr, value in attrs.items():
self.attr_list.addTopLevelItem(Qt.QTreeWidgetItem([attr, self.repr_value(value), str(type(value))]))
add_attr_box = Qt.QWidget()
add_attr_box.setLayout(Qt.QHBoxLayout())
self.attr_name_edit = Qt.QLineEdit()
self.attr_value_edit = Qt.QLineEdit()
self.attr_value_edit.returnPressed.connect(self.add_attribute)
self.attr_list.itemClicked.connect(self.attr_clicked)
self.add_attr_button = Qt.QPushButton('Add Attribute')
self.add_attr_button = Qt.QPushButton('Add Attribute')
self.add_attr_button.clicked.connect(self.add_attribute)
add_attr_box.layout().addWidget(Qt.QLabel('name'))
add_attr_box.layout().addWidget(self.attr_name_edit)
add_attr_box.layout().addWidget(Qt.QLabel('value'))
add_attr_box.layout().addWidget(self.attr_value_edit)
add_attr_box.layout().addWidget(self.add_attr_button)
self.new_attr = True
self.attr_name_edit.textChanged.connect(self.check_attr_name)
self.layout().addWidget(self.attr_list)
self.layout().addWidget(add_attr_box)
self.attr_list_items = {}
def repr_value(self, v):
if isinstance(v, float) and v > 1e4:
return '%.2e' % v
else:
return str(v)
def set_proxy(self, proxy):
self.proxy = proxy
def update_attrs(self, attrs):
for k, v in attrs.items():
if k not in self.attr_list_items:
item = Qt.QTreeWidgetItem([k, self.repr_value(v), str(type(v))])
self.attr_list_items[k] = item
self.attr_list.addTopLevelItem(item)
else:
self.attr_list_items[k].setText(1, self.repr_value(v))
self.attr_list_items[k].setText(2, str(type(v)))
def check_attr_name(self, name):
if any(i.text(0) == name for i in self.attr_list.findItems("", Qt.Qt.MatchContains)):
if self.new_attr:
self.new_attr = False
self.add_attr_button.setText('Update Attribute')
else:
if not self.new_attr:
self.new_attr = True
self.add_attr_button.setText('Add Attribute')
def attr_clicked(self, item):
self.attr_name_edit.setText(item.text(0))
self.attr_value_edit.setText(item.text(1))
def add_attribute(self):
name = str(self.attr_name_edit.text())
value = str(self.attr_value_edit.text())
if value.lower() in ('true', 'false'):
if value.lower() == 'false':
value = False
else:
value = True
else:
try:
value = int(value)
except ValueError:
try:
value = float(value)
except ValueError:
pass
if self.proxy is not None:
self.proxy.set_attrs(**{name: value})
else:
if self.new_attr:
self.attr_list.addTopLevelItem(Qt.QTreeWidgetItem([name, self.repr_value(value), str(type(value))]))
else:
i = self.attr_list.findItems(name, Qt.Qt.MatchExactly, 0)[0]
i.setText(1, str(value))
self.attr_name_edit.setText("")
self.attr_value_edit.setText("")
return name, value
class ItemWidget(pg.dockarea.Dock):
dock_area = None
def __init__(self, item, **kwargs):
ident = item.strpath
label_text = item.path[-1]
for p in reversed(item.path[:-1]):
new_label_text = p + '/' + label_text
if len(new_label_text) > 25:
label_text = '...' + label_text
break
label_text = new_label_text
if ' :: ' in label_text and len(label_text) > 35:
label_text = 'multiplot'
pointSize = 14 if len(label_text) < 30 else 12
pg.dockarea.Dock.__init__(self, label_text)
self.timestamp = time.time()
self.label.setFont(Qt.QFont('Helvetica', pointSize=pointSize))
self.ident = ident
self.window_item = item
self.plots_widget = Qt.QWidget()
self.plots_widget.setLayout(Qt.QVBoxLayout())
self.addWidget(self.plots_widget)
self.add_plot_widget(**kwargs)
self.buttons_widget = Qt.QWidget() #QHBoxWidget()
self.buttons_widget.setLayout(Qt.QHBoxLayout())
self.remove_button = Qt.QPushButton('Hide')
self.remove_button.clicked.connect(self.toggle_hide)
self.maximize_button = Qt.QPushButton('Maximize')
self.maximize_button.clicked.connect(lambda: self.dock_area.hide_all_but(self))
self.update_toggle = Qt.QCheckBox('Update')
self.update_toggle.setChecked(True)
self.buttons_widget.layout().addWidget(self.remove_button)
self.buttons_widget.layout().addWidget(self.maximize_button)
self.buttons_widget.layout().addWidget(self.update_toggle)
self.buttons_widget.setContentsMargins(0, 0, 0, 0)
self.buttons_widget.layout().setContentsMargins(0, 0, 0, 0)
self.buttons_widget.layout().setAlignment(Qt.Qt.AlignLeft)
self.plots_widget.setContentsMargins(0, 0, 0, 0)
self.plots_widget.layout().setContentsMargins(0, 0, 0, 0)
self.addWidget(self.buttons_widget)
self.dock_area.add_dock_auto_location(self)
def is_visible(self):
return self.parent() is not None
def toggle_hide(self, show=None):
if show is None:
show = not self.is_visible()
if self.is_visible() and not show:
self.dock_area.remove_dock(self)
elif show:
self.dock_area.add_dock_auto_location(self)
def update_params(self, **kwargs):
self.__dict__.update(kwargs)
def add_plot_widget(self, **kwargs):
raise NotImplementedError
def update_plot(self, data, attrs=None):
self.timestamp = time.time()
def clear_plot(self):
raise NotImplementedError
class Rank1ItemWidget(ItemWidget):
rank = 1
plot_attrs = ["x0", "xscale",
"xlabel", "ylabel",
"parametric", "plot_args"]
def __init__(self, item, **kwargs):
ItemWidget.__init__(self, item, **kwargs)
def add_plot_widget(self, **kwargs):
self.line_plt = CrosshairPlotWidget(**kwargs)
self.line_plt.plotItem.showGrid(x=True, y=True)
self.plots_widget.layout().addWidget(self.line_plt)
self.curve = None
def update_plot(self, data, attrs=None):
super(Rank1ItemWidget, self).update_plot(data, attrs)
if attrs is None:
attrs = {}
x0 = attrs.get("x0", 0)
xscale = attrs.get("xscale", 1)
xlabel = attrs.get("xlabel", "X")
ylabel = attrs.get("ylabel", "Y")
parametric = attrs.get("parametric", False)
self.line_plt.parametric = parametric
plot_args = attrs.get("plot_args", {})
if data is None or data.shape[0] is 0:
self.clear_plot()
return
if self.update_toggle.isChecked():
if parametric:
if data.shape[0] == 2:
xdata, ydata = data
elif data.shape[1] == 2:
xdata, ydata = data.T
else:
raise ValueError('data claims to be parametric, but shape is ' + str(data.shape))
else:
ydata = data
xdata = np.linspace(x0, x0+(xscale*(len(ydata)-1)), len(data))
self.line_plt.plotItem.setLabels(bottom=(xlabel,), left=(ylabel,))
if self.curve is None:
self.curve = self.line_plt.plot(xdata, ydata, **plot_args)
else:
self.curve.setData(x=xdata, y=ydata, **plot_args)
def clear_plot(self):
if self.curve is not None:
self.line_plt.removeItem(self.curve)
self.curve = None
class MultiplotItemWidget(Rank1ItemWidget):
def add_plot_widget(self, **kwargs):
Rank1ItemWidget.add_plot_widget(self, **kwargs)
self.curves = {}
def update_path(self, path, data, attrs=None):
if path not in self.curves:
self.curves[path] = self.line_plt.plot([], pen=tuple(random_color()), name='/'.join(path))
self.curve = self.curves[path] # This is kind of a hack isn't it. How do you OOP again?
Rank1ItemWidget.update_plot(self, data, attrs)
class ParametricItemWidget(Rank1ItemWidget):
def __init__(self, item, **kwargs):
Rank1ItemWidget.__init__(self, item, **kwargs)
self.path1, self.path2 = [i.path for i in item.sources]
self.datas = {self.path1: [], self.path2: []}
self.transpose_toggle = Qt.QCheckBox('Transpose')
self.transpose_toggle.stateChanged.connect(lambda s: self.refresh_plot())
self.buttons_widget.layout().addWidget(self.transpose_toggle)
def update_path(self, path, data, attrs=None):
self.datas[path] = data
self.refresh_plot(attrs)
def refresh_plot(self, attrs=None):
data = np.array(zip(self.datas[self.path1], self.datas[self.path2]))
if attrs is None:
attrs = {}
attrs = attrs.copy()
attrs['parametric'] = True
attrs['xlabel'] = '/'.join(self.path1)
attrs['ylabel'] = '/'.join(self.path2)
if self.transpose_toggle.isChecked():
data = np.transpose(np.array([data[:, 1], data[:, 0]]))
attrs['xlabel'], attrs['ylabel'] = attrs['ylabel'], attrs['xlabel']
self.update_plot(data, attrs)
class Rank2ItemWidget(Rank1ItemWidget):
rank = 2
plot_attrs = ["x0", "xscale",
"y0", "yscale",
"xlabel", "ylabel", "zlabel",
"parametric", "plot_args"]
def __init__(self, item, **kwargs):
Rank1ItemWidget.__init__(self, item, **kwargs)
self.histogram_check = Qt.QCheckBox('Histogram')
self.histogram_check.stateChanged.connect(self.img_view.set_histogram)
self.autolevels_check = Qt.QCheckBox('Autolevels')
self.autolevels_check.setChecked(True)
self.autolevels_check.stateChanged.connect(lambda s: self.update_plot(self.cur_data, self.cur_attrs))
self.img_widgets = [self.histogram_check, self.autolevels_check]
self.most_recent_check = Qt.QCheckBox('Most Recent')
self.most_recent_check.setChecked(True)
self.line_scrubber = Qt.QSlider(Qt.Qt.Horizontal)
self.line_scrubber.valueChanged.connect(self.set_line)
self.line_widgets = [self.most_recent_check, self.line_scrubber]
img_radio = Qt.QRadioButton("Image")
img_radio.clicked.connect(self.show_img_plot)
img_radio.setChecked(True)
gl_radio = Qt.QRadioButton("Surface")
gl_radio.clicked.connect(self.show_gl_plot)
line_radio = Qt.QRadioButton("Last Line")
line_radio.clicked.connect(self.show_line_plot)
for widget in self.img_widgets + self.line_widgets:
self.buttons_widget.layout().addWidget(widget)
for widget in self.line_widgets:
widget.hide()
self.buttons_widget.layout().addWidget(img_radio)
self.buttons_widget.layout().addWidget(gl_radio)
self.buttons_widget.layout().addWidget(line_radio)
self.cur_data = None
self.cur_attrs = {}
def set_line(self, value):
print 'set line', value
if self.cur_data is not None:
Rank1ItemWidget.update_plot(self, self.cur_data[value, :], self.cur_attrs)
def show_img_plot(self):
self.img_view.show()
self.line_plt.hide()
if self.gl_view is not None:
self.gl_view.hide()
for widget in self.img_widgets:
widget.show()
for widget in self.line_widgets:
widget.hide()
def show_gl_plot(self):
self.line_plt.hide()
self.img_view.hide()
for widget in self.img_widgets + self.line_widgets:
widget.hide()
if self.gl_view is None:
self.gl_view = gl.GLViewWidget()
self.gl_view.setSizePolicy(Qt.QSizePolicy.Expanding, Qt.QSizePolicy.Expanding)
self.plots_widget.layout().addWidget(self.gl_view)
if self.img_view.image is not None:
self.update_plot(self.img_view.image)
self.gl_view.show()
def show_line_plot(self):
self.img_view.hide()
if self.gl_view is not None:
self.gl_view.hide()
self.line_plt.show()
for widget in self.line_widgets:
widget.show()
for widget in self.img_widgets:
widget.hide()
def add_plot_widget(self, **kwargs):
Rank1ItemWidget.add_plot_widget(self)
self.line_plt.hide()
self.curve = None
self.img_view = CrossSectionWidget()
self.plots_widget.layout().addWidget(self.img_view)
#self.addWidget(self.line_plt)
self.gl_view = None
self.surface = None
def update_plot(self, data, attrs=None):
if attrs is None:
attrs = {}
x0 = attrs.get("x0", 0)
y0 = attrs.get("y0", 0)
xscale = attrs.get("xscale", 1)
yscale = attrs.get("yscale", 1)
xlabel = attrs.get("xlabel", "X")
ylabel = attrs.get("ylabel", "Y")
zlabel = attrs.get("zlabel", "Z")
plot_args = attrs.get("plot_args", {})
self.cur_data = data
self.cur_attrs = attrs
if data is None:
self.clear_plot()
return
if self.update_toggle.isChecked():
self.line_scrubber.setMaximum(len(data)-1)
self.img_view.setLabels(xlabel, ylabel, zlabel)
if self.most_recent_check.isChecked():
self.line_scrubber.setValue(len(data)-1) # This updates the line plot
# Well, this is a hack. I'm not sure why autorange is disabled after setImage
autorange = self.img_view.getView().vb.autoRangeEnabled()[0]
autolevels = self.autolevels_check.isChecked()
self.img_view.setImage(data, autoRange=autorange, autoLevels=autolevels, pos=[x0, y0], scale=[xscale, yscale])
self.img_view.getView().vb.enableAutoRange(enable=autorange)
if self.gl_view is not None:
if self.surface is None or data.shape != self.surface._z.shape:
x1 = x0 + data.shape[0]*xscale
y1 = y0 + data.shape[1]*yscale
xs = np.arange(x0, x1, xscale)
ys = np.arange(y0, y1, yscale)
#grid = gl.GLGridItem()
#self.gl_view.addItem(grid)
if self.surface is not None:
self.gl_view.removeItem(self.surface)
self.surface = gl.GLSurfacePlotItem(x=xs, y=ys, shader='shaded')
self.gl_view.addItem(self.surface)
self.surface.setData(z=data)
def clear_plot(self):
Rank1ItemWidget.clear_plot(self)
#Rank1ItemWidget.update_plot(self, None)
#self.img_view.setImage(np.array([[]]))
self.img_view.imageItem.hide()
def show_recent(self):
self.img_view.hide()
self.line_plt.show()
self.recent_button.hide()
self.accum_button.show()
def show_accumulated(self):
self.img_view.show()
self.line_plt.hide()
self.recent_button.show()
self.accum_button.hide()
class Rank2ParametricWidget(ItemWidget):
def add_plot_widget(self):
self.gl_view = gl.GLViewWidget()
self.gl_view.setSizePolicy(Qt.QSizePolicy.Expanding, Qt.QSizePolicy.Expanding)
self.plots_widget.layout().addWidget(self.gl_view)
self.scatter = gl.GLScatterPlotItem(color=(1,1,1,.3), size=.1, pxMode=False)
self.gl_view.addItem(self.scatter)
def update_plot(self, data, attrs=None):
self.scatter.setData(pos=data)
class CrosshairPlotWidget(pg.PlotWidget):
def __init__(self, parametric=False, *args, **kwargs):
super(CrosshairPlotWidget, self).__init__(*args, **kwargs)
self.scene().sigMouseClicked.connect(self.toggle_search)
self.scene().sigMouseMoved.connect(self.handle_mouse_move)
self.cross_section_enabled = False
self.parametric = parametric
self.search_mode = True
self.label = None
def toggle_search(self, mouse_event):
if mouse_event.double():
if self.cross_section_enabled:
self.hide_cross_hair()
else:
self.add_cross_hair()
elif self.cross_section_enabled:
self.search_mode = not self.search_mode
if self.search_mode:
self.handle_mouse_move(mouse_event.scenePos())
def handle_mouse_move(self, mouse_event):
if self.cross_section_enabled and self.search_mode:
item = self.getPlotItem()
vb = item.getViewBox()
view_coords = vb.mapSceneToView(mouse_event)
view_x, view_y = view_coords.x(), view_coords.y()
best_guesses = []
for data_item in item.items:
if isinstance(data_item, pg.PlotDataItem):
xdata, ydata = data_item.xData, data_item.yData
index_distance = lambda i: (xdata[i]-view_x)**2 + (ydata[i] - view_y)**2
if self.parametric:
index = min(range(len(xdata)), key=index_distance)
else:
index = min(np.searchsorted(xdata, view_x), len(xdata)-1)
if index and xdata[index] - view_x > view_x - xdata[index - 1]:
index -= 1
pt_x, pt_y = xdata[index], ydata[index]
best_guesses.append(((pt_x, pt_y), index_distance(index)))
if not best_guesses:
return
(pt_x, pt_y), _ = min(best_guesses, key=lambda x: x[1])
self.v_line.setPos(pt_x)
self.h_line.setPos(pt_y)
self.label.setText("x=%.2e, y=%.2e" % (pt_x, pt_y))
def add_cross_hair(self):
self.h_line = pg.InfiniteLine(angle=0, movable=False)
self.v_line = pg.InfiniteLine(angle=90, movable=False)
self.addItem(self.h_line, ignoreBounds=False)
self.addItem(self.v_line, ignoreBounds=False)
if self.label is None:
self.label = pg.LabelItem(justify="right")
self.getPlotItem().layout.addItem(self.label, 4, 1)
self.x_cross_index = 0
self.y_cross_index = 0
self.cross_section_enabled = True
def hide_cross_hair(self):
self.removeItem(self.h_line)
self.removeItem(self.v_line)
self.cross_section_enabled = False
class CrossSectionWidget(pg.ImageView):
def __init__(self, trace_size=80, **kwargs):
view = pg.PlotItem(labels=kwargs.pop('labels', None))
pg.ImageView.__init__(self, view=view, **kwargs)
view.setAspectLocked(lock=False)
self.cross_section_enabled = False
self.search_mode = False
self.signals_connected = False
self.set_histogram(False)
self.ui.histogram.gradient.loadPreset('thermal')
try:
self.connect_signal()
except RuntimeError:
warnings.warn('Scene not set up, cross section signals not connected')
self.y_cross_index = 0
self.h_cross_dock = pyqtgraph.dockarea.Dock('x trace')
self.h_cross_section_widget = CrosshairPlotWidget()
self.h_cross_section_widget.add_cross_hair()
self.h_cross_section_widget.search_mode = False
self.h_cross_section_widget_data = self.h_cross_section_widget.plot([0,0])
self.h_cross_dock.addWidget(self.h_cross_section_widget)
self.x_cross_index = 0
self.v_cross_dock = pyqtgraph.dockarea.Dock('y trace')
self.v_cross_section_widget = CrosshairPlotWidget()
self.v_cross_section_widget.add_cross_hair()
self.v_cross_section_widget.search_mode = False
self.v_cross_section_widget_data = self.v_cross_section_widget.plot([0,0])
self.v_cross_dock.addWidget(self.v_cross_section_widget)
def setLabels(self, xlabel="X", ylabel="Y", zlabel="Z"):
self.view.setLabels(bottom=(xlabel,), left=(ylabel,))
self.h_cross_section_widget.plotItem.setLabels(bottom=xlabel, left=zlabel)
self.v_cross_section_widget.setLabels(bottom=ylabel, left=zlabel)
#self.setLabels(xlabel, ylabel)
self.ui.histogram.item.axis.setLabel(text=zlabel)
def setImage(self, *args, **kwargs):
if 'pos' in kwargs:
self._x0, self._y0 = kwargs['pos']
if 'scale' in kwargs:
self._xscale, self._yscale = kwargs['scale']
pg.ImageView.setImage(self, *args, **kwargs)
self.update_cross_section()
def toggle_cross_section(self):
if self.cross_section_enabled:
self.hide_cross_section()
else:
self.add_cross_section()
def set_histogram(self, visible):
self.ui.histogram.setVisible(visible)
self.ui.roiBtn.setVisible(visible)
self.ui.normBtn.setVisible(visible)
def add_cross_section(self):
if self.imageItem.image is not None:
(min_x, max_x), (min_y, max_y) = self.imageItem.getViewBox().viewRange()
mid_x, mid_y = (max_x + min_x)/2., (max_y + min_y)/2.
else:
mid_x, mid_y = 0, 0
self.h_line = pg.InfiniteLine(pos=mid_y, angle=0, movable=False)
self.v_line = pg.InfiniteLine(pos=mid_x, angle=90, movable=False)
self.view.addItem(self.h_line, ignoreBounds=False)
self.view.addItem(self.v_line, ignoreBounds=False)
self.x_cross_index = 0
self.y_cross_index = 0
self.cross_section_enabled = True
self.label = pg.LabelItem(justify="right")
#self.cs_layout.addItem(self.label, 2, 1) #TODO: Find a way of displaying this label
self.search_mode = True
ItemWidget.dock_area.addDock(self.h_cross_dock)
ItemWidget.dock_area.addDock(self.v_cross_dock, position='right', relativeTo=self.h_cross_dock)
def hide_cross_section(self):
self.view.removeItem(self.h_line)
self.view.removeItem(self.v_line)
self.cross_section_enabled = False
ItemWidget.dock_area.remove_dock(self.h_cross_dock)
ItemWidget.dock_area.remove_dock(self.v_cross_dock)
def connect_signal(self):
"""This can only be run after the item has been embedded in a scene"""
if self.signals_connected:
warnings.warn("")
if self.imageItem.scene() is None:
raise RuntimeError('Signal can only be connected after it has been embedded in a scene.')
self.imageItem.scene().sigMouseClicked.connect(self.toggle_search)
self.imageItem.scene().sigMouseMoved.connect(self.handle_mouse_move)
self.timeLine.sigPositionChanged.connect(self.update_cross_section)
self.signals_connected = True
def toggle_search(self, mouse_event):
if mouse_event.double():
self.toggle_cross_section()
elif self.cross_section_enabled:
self.search_mode = not self.search_mode
if self.search_mode:
self.handle_mouse_move(mouse_event.scenePos())
def handle_mouse_move(self, mouse_event):
if self.cross_section_enabled and self.search_mode:
view_coords = self.imageItem.getViewBox().mapSceneToView(mouse_event)
view_x, view_y = view_coords.x(), view_coords.y()
item_coords = self.imageItem.mapFromScene(mouse_event)
item_x, item_y = item_coords.x(), item_coords.y()
max_x, max_y = self.imageItem.image.shape
if item_x < 0 or item_x > max_x or item_y < 0 or item_y > max_y:
return
self.v_line.setPos(view_x)
self.h_line.setPos(view_y)
#(min_view_x, max_view_x), (min_view_y, max_view_y) = self.imageItem.getViewBox().viewRange()
self.x_cross_index = max(min(int(item_x), max_x-1), 0)
self.y_cross_index = max(min(int(item_y), max_y-1), 0)
self.update_cross_section()
self.label.setText("x=%.2e, y=%.2e" % (view_x, view_y))
def update_cross_section(self):
nx, ny = self.imageItem.image.shape
x0, y0, xscale, yscale = self._x0, self._y0, self._xscale, self._yscale
xdata = np.linspace(x0, x0+(xscale*(nx-1)), nx)
ydata = np.linspace(y0, y0+(yscale*(ny-1)), ny)
zval = self.imageItem.image[self.x_cross_index, self.y_cross_index]
self.h_cross_section_widget_data.setData(xdata, self.imageItem.image[:, self.y_cross_index])
self.h_cross_section_widget.v_line.setPos(xdata[self.x_cross_index])
self.h_cross_section_widget.h_line.setPos(zval)
self.v_cross_section_widget_data.setData(ydata, self.imageItem.image[self.x_cross_index, :])
self.v_cross_section_widget.v_line.setPos(ydata[self.y_cross_index])
self.v_cross_section_widget.h_line.setPos(zval)
def random_color(base=50):
'A whitish random color. Adjust whiteness up by increasing base'
return np.random.randint(base, 255, 3)