Source code for pyface.data_view.value_types.constant_value

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from traits.api import Str, Union, observe

from pyface.ui_traits import PyfaceColor
from pyface.data_view.abstract_value_type import AbstractValueType
from pyface.ui_traits import Image


[docs]class ConstantValue(AbstractValueType): """ A value type that does not depend on the underlying data model. This value type is not editable, but the other data channels it provides can be modified by changing the appropriate trait on the value type. """ #: The text value to display. text = Str(update_value_type=True) #: The color value to display or None if no color. color = Union(None, PyfaceColor) #: The image value to display. image = Image(update_value_type=True) #: The tooltip value to display. tooltip = Str(update_value_type=True)
[docs] def has_editor_value(self, model, row, column): return False
[docs] def get_text(self, model, row, column): return self.text
[docs] def has_color(self, model, row, column): """ Whether or not the value has color data. Returns true if the supplied color is not None. Parameters ---------- model : AbstractDataModel The data model holding the data. row : sequence of int The row in the data model being queried. column : sequence of int The column in the data model being queried. Returns ------- has_color : bool Whether or not the value has data-associated color values. """ return self.color is not None
[docs] def get_color(self, model, row, column): """ Get data-associated colour values for the given item. The default implementation returns white. Parameters ---------- model : AbstractDataModel The data model holding the data. row : sequence of int The row in the data model being queried. column : sequence of int The column in the data model being queried. Returns ------- color : Color instance The color associated with the cell. """ return self.color
[docs] def has_image(self, model, row, column): return self.image is not None
[docs] def get_image(self, model, row, column): if self.image is not None: return self.image return super().get_image(model, row, column)
[docs] def get_tooltip(self, model, row, column): return self.tooltip
@observe('color.rgba') def _color_updated(self, event): self.updated = True