Built-in Parameter Types


class pyqtgraph.parametertree.parameterTypes.ActionParameter(**opts)[source]

Used for displaying a button within the tree.

sigActivated(self) is emitted when the button is clicked.


alias of pyqtgraph.parametertree.parameterTypes.action.ActionParameterItem

class pyqtgraph.parametertree.parameterTypes.CalendarParameter(**opts)[source]

Displays a Qt calendar whose date is specified by a ‘format’ option.



Format for displaying the date and converting from a string. Can be any value accepted by QDate.toString and fromString, or a stringified version of a QDateFormat enum, i.e. ‘ISODate’, ‘TextDate’ (default), etc.

class pyqtgraph.parametertree.parameterTypes.ChecklistParameter(**opts)[source]

Can be set just like a ListParameter, but allows for multiple values to be selected simultaneously.



When False, any number of options can be selected. The resulting value() is a list of all checked values. When True, it behaves like a list type – only one value can be selected. If no values are selected and exclusive is set to True, the first available limit is selected. The return value of an exclusive checklist is a single value rather than a list with one element.


alias of pyqtgraph.parametertree.parameterTypes.checklist.ChecklistParameterItem

class pyqtgraph.parametertree.parameterTypes.ColorMapParameter(*args, **kargs)[source]

alias of pyqtgraph.parametertree.parameterTypes.colormap.ColorMapParameterItem

class pyqtgraph.parametertree.parameterTypes.ColorParameter(*args, **kargs)[source]

alias of pyqtgraph.parametertree.parameterTypes.color.ColorParameterItem

class pyqtgraph.parametertree.parameterTypes.FileParameter(**opts)[source]

Interfaces with the myriad of file options available from a QFileDialog.

Note that the output can either be a single file string or list of files, depending on whether fileMode=’ExistingFiles’ is specified.

Note that in all cases, absolute file paths are returned unless relativeTo is specified as elaborated below.



Dialog parent


Title of dialog window


File filter as required by the Qt dialog


Where in the file system to open this dialog


File to preselect


Parent directory that, if provided, will be removed from the prefix of all returned paths. So, if ‘/my/text/file.txt’ was selected, and relativeTo=’my/text/’, the return value would be ‘file.txt’. This uses os.path.relpath under the hood, so expect that behavior.


Any enum value accepted by a QFileDialog and its value. Values can be a string or list of strings, i.e. fileMode=’AnyFile’, options=[‘ShowDirsOnly’, ‘DontResolveSymlinks’]

class pyqtgraph.parametertree.parameterTypes.FontParameter(**opts)[source]

Creates and controls a QFont value. Be careful when selecting options from the font dropdown. since not all fonts are available on all systems

class pyqtgraph.parametertree.parameterTypes.GroupParameter(**opts)[source]

Group parameters are used mainly as a generic parent item that holds (and groups!) a set of child parameters.

It also provides a simple mechanism for displaying a button or combo that can be used to add new parameters to the group. To enable this, the group must be initialized with the ‘addText’ option (the text will be displayed on a button which, when clicked, will cause addNew() to be called). If the ‘addList’ option is specified as well, then a dropdown-list of addable items will be displayed instead of a button.


This method is called when the user has requested to add a new item to the group. By default, it emits sigAddNew(self, typ).


alias of pyqtgraph.parametertree.parameterTypes.basetypes.GroupParameterItem


Change the list of options available for the user to add to the group.

class pyqtgraph.parametertree.parameterTypes.ListParameter(**opts)[source]

Parameter with a list of acceptable values.

By default, this parameter is represtented by a ListParameterItem, displaying a combo box to select a value from the list.

In addition to the generic Parameter options, this parameter type accepts a limits argument specifying the list of allowed values.

The values may generally be of any data type, as long as they can be represented as a string. If the string representation provided is undesirable, the values may be given as a dictionary mapping the desired string representation to the value.


alias of pyqtgraph.parametertree.parameterTypes.list.ListParameterItem


Change the list of allowed values.

class pyqtgraph.parametertree.parameterTypes.PenParameter(**opts)[source]

Controls the appearance of a QPen value.

When saveState is called, the value is encoded as (color, width, style, capStyle, joinStyle, cosmetic)



pen color, can be any argument accepted by mkColor() (defaults to black)


integer width >= 0 (defaults to 1)


String version of QPenStyle enum, i.e. ‘SolidLine’ (default), ‘DashLine’, etc.


String version of QPenCapStyle enum, i.e. ‘SquareCap’ (default), ‘RoundCap’, etc.


String version of QPenJoinStyle enum, i.e. ‘BevelJoin’ (default), ‘RoundJoin’, etc.


Boolean, whether or not the pen is cosmetic (defaults to True)

mkPen(*args, **kwargs)[source]

Thin wrapper around fn.mkPen which accepts the serialized state from saveState

class pyqtgraph.parametertree.parameterTypes.ProgressBarParameter(**opts)[source]

Displays a progress bar whose value can be set between 0 and 100

class pyqtgraph.parametertree.parameterTypes.SimpleParameter(*args, **kargs)[source]

Parameter representing a single value.

This parameter is backed by WidgetParameterItem to represent the following parameter names through various subclasses:

  • ‘int’

  • ‘float’

  • ‘bool’

  • ‘str’

  • ‘color’

  • ‘colormap’

class pyqtgraph.parametertree.parameterTypes.SliderParameter(**opts)[source]



[start, stop] numbers


Defaults to 1, the spacing between each slider tick


Instead of limits + step, span can be set to specify the range of slider options (e.g. np.linspace(-pi, pi, 100))


Format string to determine number of decimals to show, etc. Defaults to display based on span dtype


int number of decimals to keep for float tick spaces

class pyqtgraph.parametertree.parameterTypes.TextParameter(**opts)[source]

Editable string, displayed as large text box in the tree.


alias of pyqtgraph.parametertree.parameterTypes.text.TextParameterItem


class pyqtgraph.parametertree.parameterTypes.ActionParameterItem(param, depth)[source]

ParameterItem displaying a clickable button.

class pyqtgraph.parametertree.parameterTypes.BoolParameterItem(param, depth)[source]

Registered parameter type which displays a QCheckBox

class pyqtgraph.parametertree.parameterTypes.CalendarParameterItem(param, depth)[source]
class pyqtgraph.parametertree.parameterTypes.ChecklistParameterItem(param, depth)[source]

Wraps a GroupParameterItem to manage bool parameter children. Also provides convenience buttons to select or clear all values at once. Note these conveniences are disabled when exclusive is True.

class pyqtgraph.parametertree.parameterTypes.ColorMapParameterItem(param, depth)[source]

Registered parameter type which displays a GradientWidget

class pyqtgraph.parametertree.parameterTypes.ColorParameterItem(param, depth)[source]

Registered parameter type which displays a ColorButton

class pyqtgraph.parametertree.parameterTypes.FileParameterItem(param, depth)[source]
class pyqtgraph.parametertree.parameterTypes.FontParameterItem(param, depth)[source]
class pyqtgraph.parametertree.parameterTypes.GroupParameterItem(param, depth)[source]

Group parameters are used mainly as a generic parent item that holds (and groups!) a set of child parameters. It also provides a simple mechanism for displaying a button or combo that can be used to add new parameters to the group.


Called when “add new” combo is changed The parameter MUST have an ‘addNew’ method defined.


Called when “add new” button is clicked The parameter MUST have an ‘addNew’ method defined.

class pyqtgraph.parametertree.parameterTypes.ListParameterItem(param, depth)[source]

WidgetParameterItem subclass providing comboBox that lets the user select from a list of options.

class pyqtgraph.parametertree.parameterTypes.NumericParameterItem(param, depth)[source]

Subclasses WidgetParameterItem to provide the following types:

Registered Types:


Displays a SpinBox in integer mode.


Displays a SpinBox.

class pyqtgraph.parametertree.parameterTypes.PenParameterItem(param, depth)[source]
class pyqtgraph.parametertree.parameterTypes.ProgressBarParameterItem(param, depth)[source]
class pyqtgraph.parametertree.parameterTypes.SliderParameterItem(param, depth)[source]
class pyqtgraph.parametertree.parameterTypes.StrParameterItem(param, depth)[source]

Registered parameter type which displays a QLineEdit

class pyqtgraph.parametertree.parameterTypes.TextParameterItem(param, depth)[source]

ParameterItem displaying a QTextEdit widget.