profile: Profile tool for PlotWidget

This module provides tools to get profiles on plot data.

It provides:

• ScatterProfileToolBar: a QToolBar to handle profile on scatter data

The profile package is divided into several sub-modules.

manager module

This module provides a manager to compute and display profiles.

ProfileManager class

class ProfileManager(parent=None, plot=None, roiManager=None)

Bases: silx.gui.qt._qt.QObject

Base class for profile management tools

Parameters

• plot – PlotWidget on which to operate.

• plot – RegionOfInterestManager on which to operate.

setSingleProfile(enable)

Enable or disable the single profile mode.

In single mode, the manager enforce a single ROI at the same time. A new one will remove the previous one.

If this mode is not enabled, many ROIs can be created, and many profile windows will be displayed.

isSingleProfile()

Returns true if the manager is in a single profile mode.

Return type

bool

createProfileAction(profileRoiClass, parent=None)

Create an action from a class of ProfileRoi

Parameters

• profileRoiClass (core.ProfileRoiMixIn) – A class of a profile ROI

• parent (qt.QObject) – The parent of the created action.

Return type

qt.QAction

createClearAction(parent)

Create an action to clean up the plot from the profile ROIs.

Parameters

parent (qt.QObject) – The parent of the created action.

Return type

qt.QAction

createImageActions(parent)

Create actions designed for image items. This actions created new ROIs.

Parameters

parent (qt.QObject) – The parent of the created action.

Return type

List[qt.QAction]

createScatterActions(parent)

Create actions designed for scatter items. This actions created new ROIs.

Parameters

parent (qt.QObject) – The parent of the created action.

Return type

List[qt.QAction]

createScatterSliceActions(parent)

Create actions designed for regular scatter items. This actions created new ROIs.

This ROIs was designed to use the input data without interpolation, like you could do with an image.

Parameters

parent (qt.QObject) – The parent of the created action.

Return type

List[qt.QAction]

createImageStackActions(parent)

Create actions designed for stack image items. This actions created new ROIs.

This ROIs was designed to create both profile on the displayed image and profile on the full stack (2D result).

Parameters

parent (qt.QObject) – The parent of the created action.

Return type

List[qt.QAction]

createEditorAction(parent)

Create an action containing GUI to edit the selected profile ROI.

Parameters

parent (qt.QObject) – The parent of the created action.

Return type

qt.QAction

setItemType(image=False, scatter=False)

Set the item type to use and select the active one.

Parameters

• image (bool) – Image item are allowed

• scatter (bool) – Scatter item are allowed

setProfileWindowClass(profileWindowClass)

Set the class which will be instantiated to display profile result.

setActiveItemTracking(tracking)

Enable/disable the tracking of the active item of the plot.

Parameters

tracking (bool) – Tracking mode

setDefaultColorFromCursorColor(enabled)

Enabled/disable the use of the colormap cursor color to display the ROIs.

If set, the manager will update the color of the profile ROIs using the current colormap cursor color from the selected item.

clearProfile()

Clear the associated ROI profile

hasPendingOperations()

Returns true if a thread is still computing or displaying a profile.

Return type

bool

requestUpdateAllProfile()

Request to update the profile of all the managed ROIs.

requestUpdateProfile(profileRoi)

Request to update a specific profile ROI.

Parameters

profileRoi (ProfileRoiMixIn) –

setPlotItem(item)

Set the plot item focused by the profile manager.

Parameters

item (Item) – A plot item

getDefaultColor(item)

Returns the default ROI color to use according to the given item.

Parameters

item (Item) – AN item

Return type

qt.QColor

getPlotItem()

Returns the item focused by the profile manager.

Return type

Item

getPlotWidget()

The plot associated to the profile manager.

Return type

PlotWidget

getCurrentRoi()

Returns the currently selected ROI, else None.

Return type

core.ProfileRoiMixIn

getRoiManager()

Returns the used ROI manager

Return type

RegionOfInterestManager

createProfileWindow(plot, roi)

Create a new profile window.

Parameters

• roi (ProfileRoiMixIn) – The plot containing the raw data

• roi – A managed ROI

Return type

~ProfileWindow

initProfileWindow(profileWindow, roi)

This function is called just after the profile window creation in order to initialize the window location.

Parameters

profileWindow (~ProfileWindow) – The profile window to initialize.

clearProfileWindow(profileWindow)

Called when a profile window is not anymore needed.

By default the window will be closed. But it can be inherited to change this behavior.

ProfileWindow class

class ProfileWindow(parent=None, backend=None)

Bases: PyQt5.QtWidgets.QMainWindow

Display a computed profile.

The content can be described using setRoiProfile() if the source of the profile is a profile ROI, and setProfile() for the data content.

sigClose

Emitted by closeEvent() (e.g. when the window is closed through the window manager’s close icon).

prepareWidget(roi)

Called before the show to prepare the window to use with a specific ROI.

createPlot1D(parent, backend)

Inherit this function to create your own plot to render 1D profiles. The default value is a Plot1D.

Parameters

• parent – The parent of this widget or None.

• backend – The backend to use for the plot. See PlotWidget for the list of supported backend.

Return type

PlotWidget

createPlot2D(parent, backend)

Inherit this function to create your own plot to render 2D profiles. The default value is a Plot2D.

Parameters

• parent – The parent of this widget or None.

• backend – The backend to use for the plot. See PlotWidget for the list of supported backend.

Return type

PlotWidget

getPlot1D(init=True)

Return the current plot used to display curves and create it if it does not yet exists and init is True. Else returns None.

getPlot2D(init=True)

Return the current plot used to display image and create it if it does not yet exists and init is True. Else returns None.

closeEvent(self, QCloseEvent)

setRoiProfile(roi)

Set the profile ROI which it the source of the following data to display.

Parameters

roi (ProfileRoiMixIn) – The profile ROI data source

clear()

Clear the window profile

getProfile()

Returns the profile data which is displayed

setProfile(data)

Setup the window to display a new profile data.

This method dispatch the result to a specific method according to the data type.

Parameters

data – Computed data profile

editors module

This module provides editors which are used to custom profile ROI properties.

ProfileRoiEditorAction class

class ProfileRoiEditorAction(parent=None)

Bases: PyQt5.QtWidgets.QWidgetAction

Action displaying GUI to edit the selected ROI.

Parameters

parent (qt.QWidget) – Parent widget

createWidget(parent)

Inherit the method to create a new editor

deleteWidget(widget)

Inherit the method to delete an editor

setRoiManager(roiManager)

Connect this action to a ROI manager.

Parameters

roiManager (RegionOfInterestManager) – A ROI manager

setProfileRoi(roi)

Set a profile ROI to edit.

Parameters

roi (ProfileRoiMixIn) – A profile ROI

getRoiProfile()

Returns the edited profile ROI.

Return type

ProfileRoiMixIn

getEditorClass(roi)

Returns the editor class to use according to the ROI.

core module

This module define core objects for profile tools.

ProfileRoiMixIn class

class ProfileRoiMixIn(parent=None)

Bases: object

Base mix-in for ROI which can be used to select a profile.

This mix-in have to be applied to a RegionOfInterest in order to be usable by a ProfileManager.

ITEM_KIND = None

Define the plot item which can be used with this profile ROI

sigProfilePropertyChanged

Emitted when a property of this profile have changed

sigPlotItemChanged

Emitted when the plot item linked to this profile have changed

invalidateProfile()

Must be called by the implementation when the profile have to be recomputed.

invalidateProperties()

Must be called when a property of the profile have changed.

getPlotItem()

Returns the plot item used by this profile

Return type

~silx.gui.plot.items.item.Item

getProfileManager()

Returns the profile manager connected to this ROI.

Return type

ProfileManager

getProfileWindow()

Returns the windows associated to this ROI, else None.

Return type

ProfileWindow

setProfileWindow(profileWindow)

Associate a window to this ROI. Can be None.

Parameters

profileWindow (ProfileWindow) – A main window to display the profile.

computeProfile(item)

Compute the profile which will be displayed.

This method is not called from the main Qt thread, but from a thread pool.

Parameters

item (Item) – A plot item

Return type

Union[CurveProfileData,ImageProfileData]

CurveProfileData class

class CurveProfileData(coords, profile, title, xLabel, yLabel)

Bases: tuple

property coords

Alias for field number 0

property profile

Alias for field number 1

property title

Alias for field number 2

property xLabel

Alias for field number 3

property yLabel

Alias for field number 4

ImageProfileData class

class ImageProfileData(coords, profile, title, xLabel, yLabel, colormap)

Bases: tuple

property colormap

Alias for field number 5

property coords

Alias for field number 0

property profile

Alias for field number 1

property title

Alias for field number 2

property xLabel

Alias for field number 3

property yLabel

Alias for field number 4

ScatterProfileToolBar module

This module profile tools for scatter plots.

ScatterProfileToolBar

class ScatterProfileToolBar(parent=None, plot=None, title=None)

Bases: silx.gui.plot.tools.profile.toolbar.ProfileToolBar

QToolBar providing scatter plot profiling tools

Parameters

• parent – See QToolBar.

• plot – PlotWidget on which to operate.

• title (str) – See QToolBar.

rois module

This module define ROIs for profile tools.

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