def __init__(self, axis_name='', dom_min_val=0, dom_max_val=1, cmap_ini=None,
min_ini=None, max_ini=None, parent=None):
"""
Create a MplCmapEditor that allows the user to set the cmap string
and the value range.
"""
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_MplCmapEditor()
self.ui.setupUi(self)
self.parent = parent
self.dom_min_val = dom_min_val
self.dom_max_val = dom_max_val
self.axis_name = axis_name
self.min_val = dom_min_val
self.max_val = dom_max_val
# UI initialization
cmap_list = [str(s) for s in sorted(matplotlib.cm.cmap_d.keys())]
self.ui.cmap_selector_box.addItems(cmap_list)
cmap_ini = cmap_ini or 'jet'
i = self.ui.cmap_selector_box.findText(cmap_ini)
self.ui.cmap_selector_box.setCurrentIndex(i)
self.ui.label_min_val.setText('| '+self.format_val(dom_min_val))
self.ui.label_max_val.setText(self.format_val(dom_max_val)+' |')
valid_nb_decimals = 10
validator = QtGui.QDoubleValidator(dom_min_val, dom_max_val,
valid_nb_decimals)
self.ui.edit_min.setValidator(validator)
self.ui.edit_max.setValidator(validator)
min_ini = min_ini or dom_min_val
max_ini = max_ini or dom_max_val
# set labels showing min and max of domain:
self.ui.edit_min.setText(self.format_val(min_ini))
self.ui.edit_max.setText(self.format_val(max_ini))
self.ui.slider_min.setSliderPosition(self.val_to_slider_pos(min_ini))
self.ui.slider_max.setSliderPosition(self.val_to_slider_pos(max_ini))
# Signal / slot connections
# will hold last emitted range to avoid emitting 'range_value_changed'
# twice:
self.last_emitted_range = tuple()
self.connect(self.ui.cmap_selector_box,
QtCore.SIGNAL('currentIndexChanged(const QString&)'),
self.emit_cmap)
# won't work because there is two signals called currentIndexChanged
# in QComboBox:
#self.ui.cmap_selector_box.currentIndexChanged.connect(self.cmap_changed)
self._min_value_changed.connect(self._set_slider_min_pos_from_val)
self._min_value_changed.connect(self._set_edit_min_text_from_val)
self._max_value_changed.connect(self._set_slider_max_pos_from_val)
self._max_value_changed.connect(self._set_edit_max_text_from_val)
self.ui.edit_min.returnPressed.connect(self.set_min_val_from_edit)
self.ui.edit_max.returnPressed.connect(self.set_max_val_from_edit)
self.ui.slider_min.valueChanged.connect(self._set_min_val_from_slider_pos)
self.ui.slider_max.valueChanged.connect(self._set_max_val_from_slider_pos)
class MplCmapEditor(QtGui.QWidget):
# public signals
# emitted when either min or max value is changed
range_value_changed = QtCore.pyqtSignal(str, float, float,
name='RangeValueChanged')
# emitted when cmap id is changed
cmap_changed = QtCore.pyqtSignal(str, ColorMap, name='CmapChanged')
# private signals -> use for internal updates
_min_value_changed = QtCore.pyqtSignal(float, name='_MinValueChanged')
_max_value_changed = QtCore.pyqtSignal(float, name='_MaxValueChanged')
def __init__(self, axis_name='', dom_min_val=0, dom_max_val=1, cmap_ini=None,
min_ini=None, max_ini=None, parent=None):
"""
Create a MplCmapEditor that allows the user to set the cmap string
and the value range.
"""
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_MplCmapEditor()
self.ui.setupUi(self)
self.parent = parent
self.dom_min_val = dom_min_val
self.dom_max_val = dom_max_val
self.axis_name = axis_name
self.min_val = dom_min_val
self.max_val = dom_max_val
# UI initialization
cmap_list = [str(s) for s in sorted(matplotlib.cm.cmap_d.keys())]
self.ui.cmap_selector_box.addItems(cmap_list)
cmap_ini = cmap_ini or 'jet'
i = self.ui.cmap_selector_box.findText(cmap_ini)
self.ui.cmap_selector_box.setCurrentIndex(i)
self.ui.label_min_val.setText('| '+self.format_val(dom_min_val))
self.ui.label_max_val.setText(self.format_val(dom_max_val)+' |')
valid_nb_decimals = 10
validator = QtGui.QDoubleValidator(dom_min_val, dom_max_val,
valid_nb_decimals)
self.ui.edit_min.setValidator(validator)
self.ui.edit_max.setValidator(validator)
min_ini = min_ini or dom_min_val
max_ini = max_ini or dom_max_val
# set labels showing min and max of domain:
self.ui.edit_min.setText(self.format_val(min_ini))
self.ui.edit_max.setText(self.format_val(max_ini))
self.ui.slider_min.setSliderPosition(self.val_to_slider_pos(min_ini))
self.ui.slider_max.setSliderPosition(self.val_to_slider_pos(max_ini))
# Signal / slot connections
# will hold last emitted range to avoid emitting 'range_value_changed'
# twice:
self.last_emitted_range = tuple()
self.connect(self.ui.cmap_selector_box,
QtCore.SIGNAL('currentIndexChanged(const QString&)'),
self.emit_cmap)
# won't work because there is two signals called currentIndexChanged
# in QComboBox:
#self.ui.cmap_selector_box.currentIndexChanged.connect(self.cmap_changed)
self._min_value_changed.connect(self._set_slider_min_pos_from_val)
self._min_value_changed.connect(self._set_edit_min_text_from_val)
self._max_value_changed.connect(self._set_slider_max_pos_from_val)
self._max_value_changed.connect(self._set_edit_max_text_from_val)
self.ui.edit_min.returnPressed.connect(self.set_min_val_from_edit)
self.ui.edit_max.returnPressed.connect(self.set_max_val_from_edit)
self.ui.slider_min.valueChanged.connect(self._set_min_val_from_slider_pos)
self.ui.slider_max.valueChanged.connect(self._set_max_val_from_slider_pos)
def emit_cmap(self, cmap_id):
self.cmap_changed.emit(self.axis_name,
matplotlib.cm.get_cmap(str(cmap_id)))
def format_val(self, v):
""" Format a domain value (float) to display it in line edits """
return "%1.4f" %v
def set_min_val(self, val):
"""
Change the internal min value.
Emit _min_value_changed to tell other internal widgets to update
-> update slider_min position
-> update edit_max & slider_max if min_value > max_value
Emit range_value_changed if not already emitted by cascading signals
"""
self.min_val = val
self._min_value_changed.emit(val)
if self.min_val > self.max_val:
self.set_max_val(self.min_val)
if (self.min_val, self.max_val) != self.last_emitted_range:
self.range_value_changed.emit(self.axis_name, self.min_val,
self.max_val)
self.last_emitted_range = (self.min_val, self.max_val)
def set_max_val(self, val):
"""
Change the internal max value.
Emit _max_value_changed to tell other internal widgets to update
-> update slider_max position
-> update edit_min & slider_min if min_value > max_value
Emit range_value_changed if not already emitted by cascading signals
"""
self.max_val = val
self._max_value_changed.emit(val)
if self.max_val < self.min_val:
self.set_min_val(self.max_val)
if (self.min_val, self.max_val) != self.last_emitted_range:
self.range_value_changed.emit(self.axis_name, self.min_val,
self.max_val)
self.last_emitted_range = (self.min_val, self.max_val)
def val_to_slider_pos(self, val):
""" Convert a domain value (float) into a slider position (int)"""
nticks = self.ui.slider_max.maximum() * 1.
pos = nticks / (self.dom_max_val - self.dom_min_val) * \
(val - self.dom_max_val) + nticks
return int(round(pos))
def slider_pos_to_val(self, pos):
""" Convert a slider position (int) into a domain value (float)"""
nticks = self.ui.slider_max.maximum() * 1.
return (self.dom_max_val - self.dom_min_val) / nticks * \
(pos - nticks) + self.dom_max_val
def set_min_val_from_edit(self):
""" Set the current min value by reading associated line edit"""
txt = self.ui.edit_min.text()
self.set_min_val(float(txt))
def set_max_val_from_edit(self):
""" Set the current max value by reading associated line edit"""
txt = self.ui.edit_max.text()
self.set_max_val(float(txt))
@QtCore.pyqtSlot(str)
def set_value_label(self, label):
self.axis_name = label
def set_boundaries(self, vmin, vmax):
self.dom_min_val = vmin
self.dom_max_val = vmax
self.ui.label_min_val.setText('| '+self.format_val(vmin))
self.ui.label_max_val.setText(self.format_val(vmax)+' |')
valid_nb_decimals = 10
validator = QtGui.QDoubleValidator(vmin, vmax, valid_nb_decimals)
self.ui.edit_min.setValidator(validator)
self.ui.edit_max.setValidator(validator)
@QtCore.pyqtSlot(int)
def _set_min_val_from_slider_pos(self, pos):
""" Set the current min value from the given slider position (int) """
if self.val_to_slider_pos(self.min_val) != pos:
self.set_min_val(self.slider_pos_to_val(pos))
@QtCore.pyqtSlot(int)
def _set_max_val_from_slider_pos(self, pos):
""" Set the current max value from the given slider position (int) """
if self.val_to_slider_pos(self.max_val) != pos:
self.set_max_val(self.slider_pos_to_val(pos))
@QtCore.pyqtSlot(float)
def _set_slider_min_pos_from_val(self, val):
"""
Internal slot to update slider_min position
from given val (float)
"""
pos = self.val_to_slider_pos(val)
self.ui.slider_min.setSliderPosition(pos)
@QtCore.pyqtSlot(float)
def _set_edit_min_text_from_val(self, val):
"""
Internal slot to set the text of the line edit
for the min at given val (float) """
self.ui.edit_min.setText(self.format_val(val))
@QtCore.pyqtSlot(float)
def _set_slider_max_pos_from_val(self, val):
"""
Internal slot to update slider_min position
from given val (float)
"""
pos = self.val_to_slider_pos(val)
self.ui.slider_max.setSliderPosition(pos)
@QtCore.pyqtSlot(float)
def _set_edit_max_text_from_val(self, val):
"""
Internal slot to set the text of the line edit
for the max at given val (float) """
self.ui.edit_max.setText(self.format_val(val))
