tools: Tool widgets for PlotWidget

This package provides a set of widgets working with PlotWidget.

It provides some QToolBar and QWidget:

• InteractiveModeToolBar
• OutputToolBar
• ImageToolBar
• CurveToolBar
• LimitsToolBar
• PositionInfo

It also provides a roi module to handle interactive region of interest on a PlotWidget.

PositionInfo class

class PositionInfo(parent=None, plot=None, converters=None)

Bases: PySide.QtGui.QWidget

QWidget displaying coords converted from data coords of the mouse.

Provide this widget with a list of couple:

• A name to display before the data
• A function that takes (x, y) as arguments and returns something that gets converted to a string. If the result is a float it is converted with ‘%.7g’ format.

To run the following sample code, a QApplication must be initialized. First, create a PlotWindow and add a QToolBar where to place the PositionInfo widget.

>>> from silx.gui.plot import PlotWindow
>>> from silx.gui import qt

>>> plot = PlotWindow()  # Create a PlotWindow to add the widget to
>>> toolBar = qt.QToolBar()  # Create a toolbar to place the widget in
>>> plot.addToolBar(qt.Qt.BottomToolBarArea, toolBar)  # Add it to plot

Then, create the PositionInfo widget and add it to the toolbar. The PositionInfo widget is created with a list of converters, here to display polar coordinates of the mouse position.

>>> import numpy
>>> from silx.gui.plot.tools import PositionInfo

>>> position = PositionInfo(plot=plot, converters=[
...     ('Radius', lambda x, y: numpy.sqrt(x*x + y*y)),
...     ('Angle', lambda x, y: numpy.degrees(numpy.arctan2(y, x)))])
>>> toolBar.addWidget(position)  # Add the widget to the toolbar
<...>
>>> plot.show()  # To display the PlotWindow with the position widget

Parameters:

• plot – The PlotWidget this widget is displaying data coords from.
• converters – List of 2-tuple: name to display and conversion function from (x, y) in data coords to displayed value. If None, the default, it displays X and Y.
• parent – Parent widget

getPlotWidget()

Returns the PlotWidget this widget is attached to or None.

Return type:Union[PlotWidget,None]

getConverters()

Return the list of converters as 2-tuple (name, function).

updateInfo()

Update displayed information

SNAPPING_DISABLED = 0

No snapping occurs

SNAPPING_CROSSHAIR = 1

Snapping only enabled when crosshair cursor is enabled

SNAPPING_ACTIVE_ONLY = 2

Snapping only enabled for active item

SNAPPING_SYMBOLS_ONLY = 4

Snapping only when symbols are visible

SNAPPING_CURVE = 8

Snapping on curves

SNAPPING_SCATTER = 16

Snapping on scatter

setSnappingMode(mode)

Set the snapping mode.

The mode is a mask.

Parameters:mode (int) – The mode to use

getSnappingMode()

Returns the snapping mode as a mask

Return type:int

LimitsToolBar class

class LimitsToolBar(parent=None, plot=None, title='Limits')

Bases: PySide.QtGui.QToolBar

QToolBar displaying and controlling the limits of a PlotWidget.

To run the following sample code, a QApplication must be initialized. First, create a PlotWindow:

>>> from silx.gui.plot import PlotWindow
>>> plot = PlotWindow()  # Create a PlotWindow to add the toolbar to

Then, create the LimitsToolBar and add it to the PlotWindow.

>>> from silx.gui import qt
>>> from silx.gui.plot.tools import LimitsToolBar

>>> toolbar = LimitsToolBar(plot=plot)  # Create the toolbar
>>> plot.addToolBar(qt.Qt.BottomToolBarArea, toolbar)  # Add it to the plot
>>> plot.show()  # To display the PlotWindow with the limits toolbar

Parameters:

• parent – See QToolBar.
• plot – PlotWidget instance on which to operate.
• title (str) – See QToolBar.

plot

The PlotWidget the toolbar is attached to.

InteractiveModeToolBar class

class InteractiveModeToolBar(parent=None, plot=None, title='Plot Interaction')

Bases: PySide.QtGui.QToolBar

Toolbar with interactive mode actions

Parameters:

• parent – See QWidget
• plot (silx.gui.plot.PlotWidget) – PlotWidget to control
• title (str) – Title of the toolbar.

getZoomModeAction()

Returns the zoom mode QAction.

Return type:PlotAction

getPanModeAction()

Returns the pan mode QAction

Return type:PlotAction

OutputToolBar class

class OutputToolBar(parent=None, plot=None, title='Plot Output')

Bases: PySide.QtGui.QToolBar

Toolbar providing icons to copy, save and print a PlotWidget

Parameters:

• parent – See QWidget
• plot (silx.gui.plot.PlotWidget) – PlotWidget to control
• title (str) – Title of the toolbar.

getCopyAction()

Returns the QAction performing copy to clipboard of the PlotWidget

Return type:PlotAction

getSaveAction()

Returns the QAction performing save to file of the PlotWidget

Return type:PlotAction

getPrintAction()

Returns the QAction performing printing of the PlotWidget

Return type:PlotAction

ImageToolBar class

class ImageToolBar(parent=None, plot=None, title='Image')

Bases: PySide.QtGui.QToolBar

Toolbar providing PlotAction suited when displaying images

Parameters:

• parent – See QWidget
• plot (silx.gui.plot.PlotWidget) – PlotWidget to control
• title (str) – Title of the toolbar.

getResetZoomAction()

Returns the QAction to reset the zoom.

Return type:PlotAction

getColormapAction()

Returns the QAction to control the colormap.

Return type:PlotAction

getKeepDataAspectRatioButton()

Returns the QToolButton controlling data aspect ratio.

Return type:QToolButton

getYAxisInvertedButton()

Returns the QToolButton controlling Y axis orientation.

Return type:QToolButton

CurveToolBar class

class CurveToolBar(parent=None, plot=None, title='Image')

Bases: PySide.QtGui.QToolBar

Toolbar providing PlotAction suited when displaying curves

Parameters:

• parent – See QWidget
• plot (silx.gui.plot.PlotWidget) – PlotWidget to control
• title (str) – Title of the toolbar.

getResetZoomAction()

Returns the QAction to reset the zoom.

Return type:PlotAction

getXAxisAutoScaleAction()

Returns the QAction to toggle X axis autoscale.

Return type:PlotAction

getYAxisAutoScaleAction()

Returns the QAction to toggle Y axis autoscale.

Return type:PlotAction

getXAxisLogarithmicAction()

Returns the QAction to toggle X axis log/linear scale.

Return type:PlotAction

getYAxisLogarithmicAction()

Returns the QAction to toggle Y axis log/linear scale.

Return type:PlotAction

getGridAction()

Returns the action to toggle the plot grid.

Return type:PlotAction

getCurveStyleAction()

Returns the QAction to change the style of all curves.

Return type:PlotAction

ScatterToolBar class

class ScatterToolBar(parent=None, plot=None, title='Scatter Tools')

Bases: PySide.QtGui.QToolBar

Toolbar providing PlotAction suited when displaying scatter plot

Parameters:

• parent – See QWidget
• plot (silx.gui.plot.PlotWidget) – PlotWidget to control
• title (str) – Title of the toolbar.

getResetZoomAction()

Returns the QAction to reset the zoom.

Return type:PlotAction

getXAxisLogarithmicAction()

Returns the QAction to toggle X axis log/linear scale.

Return type:PlotAction

getYAxisLogarithmicAction()

Returns the QAction to toggle Y axis log/linear scale.

Return type:PlotAction

getGridAction()

Returns the action to toggle the plot grid.

Return type:PlotAction

getColormapAction()

Returns the QAction to control the colormap.

Return type:PlotAction

getSymbolToolButton()

Returns the QToolButton controlling symbol size and marker.

Return type:SymbolToolButton

getKeepDataAspectRatioButton()

Returns the QToolButton controlling data aspect ratio.

Return type:QToolButton

CurveLegendsWidget

This module provides a widget to display PlotWidget curve legends.

class CurveLegendsWidget(parent=None)

Bases: PySide.QtGui.QWidget

Widget displaying curves legends in a plot

Parameters:parent (QWidget) – See QWidget

sigCurveClicked = <PySide.QtCore.Signal object>

Signal emitted when the legend of a curve is clicked

It provides the corresponding curve.

getPlotWidget()

Returns the associated PlotWidget

Return type:Union[PlotWidget,None]

setPlotWidget(plot)

Set the associated PlotWidget

Parameters:plot (PlotWidget) – Plot widget to attach

curveAt(*args)

Returns the curve object represented at the given position

Either takes a QPoint or x and y as input in widget coordinates.

Return type:Union[Curve,None]

roi: Region of interest

This module provides ROI interaction for PlotWidget.

RegionOfInterestManager class

class RegionOfInterestManager(parent)

Class handling ROI interaction on a PlotWidget.

It supports the multiple ROIs: points, rectangles, polygons, lines, horizontal and vertical lines.

See plotInteractiveImageROI.py sample code (Sample Code).

Parameters:parent (silx.gui.plot.PlotWidget) – The plot widget in which to control the ROIs.

sigRoiAdded = <PySide.QtCore.Signal object>

Signal emitted when a new ROI has been added.

It provides the newly add RegionOfInterest object.

sigRoiAboutToBeRemoved = <PySide.QtCore.Signal object>

Signal emitted just before a ROI is removed.

It provides the RegionOfInterest object that is about to be removed.

sigRoiChanged = <PySide.QtCore.Signal object>

Signal emitted whenever the ROIs have changed.

sigInteractiveModeStarted = <PySide.QtCore.Signal object>

Signal emitted when switching to ROI drawing interactive mode.

It provides the class of the ROI which will be created by the interactive mode.

sigInteractiveModeFinished = <PySide.QtCore.Signal object>

Signal emitted when leaving and interactive ROI drawing.

It provides the list of ROIs.

classmethod getSupportedRoiClasses()

Returns the default available ROI classes

Return type:List[class]

getInteractionModeAction(roiClass)

Returns the QAction corresponding to a kind of ROI

The QAction allows to enable the corresponding drawing interactive mode.

Parameters:roiClass (str) – The ROI class which will be crated by this action. Return type:QAction Raises:ValueError – If kind is not supported

getRois()

Returns the list of ROIs.

It returns an empty tuple if there is currently no ROI.

Returns:Tuple of arrays of objects describing the ROIs Return type:List[RegionOfInterest]

clear()

Reset current ROIs

Returns:True if ROIs were reset. Return type:bool

createRoi(roiClass, points, label='', index=None)

Create a new ROI and add it to list of ROIs.

Parameters:

• roiClass (class) – The class of the ROI to create
• points (numpy.ndarray) – The first shape used to create the ROI
• label (str) – The label to display along with the ROI.
• index (int) – The position where to insert the ROI. By default it is appended to the end of the list.

Returns:

The created ROI object

Return type:

roi_items.RegionOfInterest

Raises:

RuntimeError – When ROI cannot be added because the maximum number of ROIs has been reached.

addRoi(roi, index=None, useManagerColor=True)

Add the ROI to the list of ROIs.

Parameters:

• roi (roi_items.RegionOfInterest) – The ROI to add
• index (int) – The position where to insert the ROI, By default it is appended to the end of the list of ROIs

Raises:

RuntimeError – When ROI cannot be added because the maximum number of ROIs has been reached.

removeRoi(roi)

Remove a ROI from the list of ROIs.

Parameters:roi (roi_items.RegionOfInterest) – The ROI to remove Raises:ValueError – When ROI does not belong to this object

getColor()

Return the default color of created ROIs

Return type:QColor

setColor(color)

Set the default color to use when creating ROIs.

Existing ROIs are not affected.

Parameters:color – The color to use for displaying ROIs as either a color name, a QColor, a list of uint8 or float in [0, 1].

getCurrentInteractionModeRoiClass()

Returns the current ROI class used by the interactive drawing mode.

Returns None if the ROI manager is not in an interactive mode.

Return type:Union[class,None]

isStarted()

Returns True if an interactive ROI drawing mode is active.

Return type:bool

start(roiClass)

Start an interactive ROI drawing mode.

Parameters:roiClass (class) – The ROI class to create. It have to inherite from roi_items.RegionOfInterest. Returns:True if interactive ROI drawing was started, False otherwise Return type:bool Raises:ValueError – If roiClass is not supported

stop()

Stop interactive ROI drawing mode.

Returns:True if an interactive ROI drawing mode was actually stopped Return type:bool

exec_(roiClass)

Block until quit() is called.

Parameters:kind (class) – The class of the ROI which have to be created. See silx.gui.plot.items.roi. Returns:The list of ROIs Return type:tuple

quit()

Stop a blocking exec_() and call stop()

InteractiveRegionOfInterestManager class

class InteractiveRegionOfInterestManager(parent)

RegionOfInterestManager with features for use from interpreter.

It is meant to be used through the exec_(). It provides some messages to display in a status bar and different modes to end blocking calls to exec_().

Parameters:parent – See QObject

sigMessageChanged = <PySide.QtCore.Signal object>

Signal emitted when a new message should be displayed to the user

It provides the message as a str.

getMaxRois()

Returns the maximum number of ROIs or None if no limit.

Return type:Union[int,None]

setMaxRois(max_)

Set the maximum number of ROIs.

Parameters:max (Union[int,None]) – The max limit or None for no limit. Raises:ValueError – If there is more ROIs than max value

isMaxRois()

Returns True if the maximum number of ROIs is reached.

Return type:bool

class ValidationMode

Mode of validation to leave blocking exec_()

AUTO = 'auto'

Automatically ends the interactive mode once the user terminates the last ROI shape.

ENTER = 'enter'

Ends the interactive mode when the Enter key is pressed.

AUTO_ENTER = 'auto_enter'

Ends the interactive mode when reaching max ROIs or when the Enter key is pressed.

NONE = 'none'

Do not provide the user a way to end the interactive mode.

The end of exec_() is done through quit() or timeout.

getValidationMode()

Returns the interactive mode validation in use.

Return type:ValidationMode

setValidationMode(mode)

Set the way to perform interactive mode validation.

See ValidationMode enumeration for the supported validation modes.

Parameters:mode (ValidationMode) – The interactive mode validation to use.

getMessage()

Returns the current status message.

This message is meant to be displayed in a status bar.

Return type:str

isExec()

Returns True if exec_() is currently running.

Return type:bool

exec_(roiClass, timeout=0)

Block until ROI selection is done or timeout is elapsed.

quit() also ends this blocking call.

Parameters:

• roiClass (class) – The class of the ROI which have to be created. See silx.gui.plot.items.roi.
• timeout (int) – Maximum duration in seconds to block. Default: No timeout

Returns:

The list of ROIs

Return type:

List[RegionOfInterest]

RegionOfInterestTableWidget class

class RegionOfInterestTableWidget(parent=None)

Widget displaying the ROIs of a RegionOfInterestManager

setRegionOfInterestManager(manager)

Set the RegionOfInterestManager object to sync with

Parameters:manager (RegionOfInterestManager) –

getRegionOfInterestManager()

Returns the RegionOfInterestManager this widget supervise.

It returns None if not sync with an RegionOfInterestManager.

Return type:RegionOfInterestManager

profile: Profile Tools

This module provides tools to get profiles on plot data.

It provides:

• ScatterProfileToolBar: a QToolBar to handle profile on scatter data

ScatterProfileToolBar

class ScatterProfileToolBar(parent=None, plot=None, title='Scatter Profile')

QToolBar providing scatter plot profiling tools

Parameters:

• parent – See QToolBar.
• plot – PlotWidget on which to operate.
• title (str) – See QToolBar.

getNPoints()

Returns the number of points of the profiles

Return type:int

setNPoints(npoints)

Set the number of points of the profiles

Parameters:npoints (int) –

clearProfile()

Clear the current line ROI and associated profile

getColor()

Returns the color used for the profile and ROI

Return type:QColor

getDefaultProfileWindow()

Returns the default floating profile window if in use else None.

See isDefaultProfileWindowEnabled()

Return type:Union[ProfileMainWindow,None]

getPlotWidget()

The PlotWidget associated to the toolbar.

Return type:Union[PlotWidget,None]

getProfilePoints(copy=True)

Returns the profile sampling points as (x, y) or None

Parameters:copy (bool) – True to get a copy, False to get internal arrays (do not modify) Return type:Union[numpy.ndarray,None]

getProfileTitle()

Returns the profile title

Return type:str

getProfileValues(copy=True)

Returns the values of the profile or None

Parameters:copy (bool) – True to get a copy, False to get internal arrays (do not modify) Return type:Union[numpy.ndarray,None]

isDefaultProfileWindowEnabled()

Returns True if the default floating profile window is used

Return type:bool

setColor(color)

Set the color to use for ROI and profile.

Parameters:color – Either a color name, a QColor, a list of uint8 or float in [0, 1].

setDefaultProfileWindowEnabled(enabled)

Set whether to use or not the default floating profile window.

Parameters:enabled (bool) – True to use, False to disable

ColorBar: ColorBar Widget

Module containing several widgets associated to a colormap.

ColorBarWidget class

class ColorBarWidget(parent=None, plot=None, legend=None)

Colorbar widget displaying a colormap

It uses a description of colormap as dict compatible with Plot.

To run the following sample code, a QApplication must be initialized.

>>> from silx.gui.plot import Plot2D
>>> from silx.gui.plot.ColorBar import ColorBarWidget

>>> plot = Plot2D()  # Create a plot widget
>>> plot.show()

>>> colorbar = ColorBarWidget(plot=plot, legend='Colormap')  # Associate the colorbar with it
>>> colorbar.show()

Initializer parameters:

Parameters:

• parent – See QWidget
• plot – PlotWidget the colorbar is attached to (optional)
• legend (str) – the label to set to the colorbar

sigVisibleChanged = <PySide.QtCore.Signal object>

Emitted when the property visible have changed.

getPlot()

Returns the Plot associated to this widget or None

setPlot(plot)

Associate a plot to the ColorBar

Parameters:plot – the plot to associate with the colorbar. If None will remove any connection with a previous plot.

getColormap()

Returns the colormap displayed in the colorbar.

Return type:Colormap

setColormap(colormap, data=None)

Set the colormap to be displayed.

Parameters:

• colormap (Colormap) – The colormap to apply on the ColorBarWidget
• data (numpy.ndarray) – the data to display, needed if the colormap require an autoscale

setLegend(legend)

Set the legend displayed along the colorbar

Parameters:legend (str) – The label

getLegend()

Returns the legend displayed along the colorbar

Returns:return the legend displayed along the colorbar Return type:str

getColorScaleBar()

Returns:return the ColorScaleBar used to display ColorScale and ticks