class QItemModelSurfaceDataProxy

Proxy class for presenting data in item models with Q3DSurfaceWidgetItem . More…

Inheritance diagram of PySide6.QtGraphs.QItemModelSurfaceDataProxy

Synopsis

Properties

  • autoColumnCategoriesᅟ - Whether column categories are generated automatically

  • autoRowCategoriesᅟ - Whether row categories are generated automatically

  • columnCategoriesᅟ - Column categories for the mapping

  • columnRoleᅟ - Item model role to map to the column category

  • columnRolePatternᅟ - Whether a search and replace is done on the value mapped by the column role before it is used as a column category

  • columnRoleReplaceᅟ - Replacement content to be used in conjunction with a column role pattern

  • itemModelᅟ - Item model used as a data source for the 3D surface

  • multiMatchBehaviorᅟ - How multiple matches for each row/column combination are handled

  • rowCategoriesᅟ - Row categories for the mapping

  • rowRoleᅟ - Item model role to map to the row category

  • rowRolePatternᅟ - Whether a search and replace is performed on the value mapped by the row role before it is used as a row category

  • rowRoleReplaceᅟ - Replacement content to be used in conjunction with the row role pattern

  • useModelCategoriesᅟ - Whether row and column roles and categories are used for mapping

  • xPosRoleᅟ - Item model role to map to the X position

  • xPosRolePatternᅟ - Whether a search and replace is done on the value mapped by the x position role before it is used as an item position value

  • xPosRoleReplaceᅟ - Replacement content to be used in conjunction with an x position role pattern

  • yPosRoleᅟ - Item model role to map to the Y position

  • yPosRolePatternᅟ - Whether a search and replace is done on the value mapped by the y position role before it is used as an item position value

  • yPosRoleReplaceᅟ - Replacement content to be used in conjunction with an y position role pattern

  • zPosRoleᅟ - Item model role to map to the Z position

  • zPosRolePatternᅟ - Whether a search and replace is done on the value mapped by the z position role before it is used as an item position value

  • zPosRoleReplaceᅟ - Replacement content to be used in conjunction with a z position role pattern

Methods

Signals

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

QItemModelSurfaceDataProxy allows you to use QAbstractItemModel derived models as a data source for Q3DSurfaceWidgetItem . It uses the defined mappings to map data from the model to rows, columns, and surface points of Q3DSurfaceWidgetItem graph.

Data is resolved asynchronously whenever the mapping or the model changes. arrayReset() is emitted when the data has been resolved. However, when useModelCategories property is set to true, single item changes are resolved synchronously, unless the same frame also contains a change that causes the whole model to be resolved.

Mappings can be used in the following ways:

  • If useModelCategories property is set to true, this proxy will map rows and columns of QAbstractItemModel to rows and columns of Q3DSurfaceWidgetItem , and uses the value returned for Qt::DisplayRole as Y-position by default. Row and column headers are used for Z-position and X-position by default, if they can be converted to floats. Otherwise row and column indices are used. The Y-position role to be used can be redefined if Qt::DisplayRole is not suitable. The Z-position and X-position roles to be used can be redefined if the headers or indices are not suitable.

  • For models that do not have data already neatly sorted into rows and columns, such as QAbstractListModel based models, you can define a role from the model to map for each of the row, column and Y-position.

  • If you do not want to include all data contained in the model, or the autogenerated rows and columns are not ordered as you wish, you can specify which rows and columns should be included and in which order by defining an explicit list of categories for either or both of rows and columns.

For example, assume that you have a custom QAbstractItemModel storing surface topography data. Each item in the model has the roles “longitude”, “latitude”, and “height”. The item model already contains the data properly sorted so that longitudes and latitudes are first encountered in correct order, which enables us to utilize the row and column category autogeneration. You could do the following to display the data in a surface graph:

proxy = QItemModelSurfaceDataProxy(customModel,()
                                                                   "longitude", // Row role
                                                                   "latitude", // Column role
                                                                   "height") # Y-position role

If the fields of the model do not contain the data in the exact format you need, you can specify a search pattern regular expression and a replace rule for each role to get the value in a format you need. For more information on how the replacement using regular expressions works, see QString::replace(const QRegularExpression &rx, const QString &after) function documentation. Note that using regular expressions has an impact on the performance, so it’s more efficient to utilize item models where doing search and replace is not necessary to get the desired values.

For example about using the search patterns in conjunction with the roles, see ItemModelBarDataProxy usage in Simple Bar Graph .

See also

Qt Graphs Data Handling with 3D

class MultiMatchBehavior

Behavior types for multiMatchBehavior property.

Constant

Description

QItemModelSurfaceDataProxy.MultiMatchBehavior.First

The position values are taken from the first item in the item model that matches each row/column combination.

QItemModelSurfaceDataProxy.MultiMatchBehavior.Last

The position values are taken from the last item in the item model that matches each row/column combination.

QItemModelSurfaceDataProxy.MultiMatchBehavior.Average

The position values from all items matching each row/column combination are averaged together and the averages are used as the surface point position.

QItemModelSurfaceDataProxy.MultiMatchBehavior.CumulativeY

For X and Z values this acts just like Average, but Y values are added together instead of averaged and the total is used as the surface point Y position.

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property autoColumnCategoriesᅟ: bool

This property holds Whether column categories are generated automatically..

When set to true, the mapping ignores any explicitly set column categories and overwrites them with automatically generated ones whenever the data from the model is resolved. Defaults to true.

Access functions:
property autoRowCategoriesᅟ: bool

This property holds Whether row categories are generated automatically..

When set to true, the mapping ignores any explicitly set row categories and overwrites them with automatically generated ones whenever the data from the model is resolved. Defaults to true.

Access functions:
property columnCategoriesᅟ: list of strings

This property holds The column categories for the mapping..

Access functions:
property columnRoleᅟ: str

This property holds The item model role to map to the column category..

In addition to defining which column the data belongs to, the value indicated by the column role is also set as the X-coordinate value of QSurfaceDataItem when model data is resolved, unless a separate x-position role is also defined.

Access functions:
property columnRolePatternᅟ: QRegularExpression

This property holds Whether a search and replace is done on the value mapped by the column role before it is used as a column category..

This property specifies the regular expression to find the portion of the mapped value to replace and the columnRoleReplace property contains the replacement string.

Access functions:
property columnRoleReplaceᅟ: str

This property holds The replacement content to be used in conjunction with a column role pattern..

Defaults to an empty string. For more information on how the search and replace using regular expressions works, see the QString::replace(const QRegularExpression &rx, const QString &after) function documentation.

Access functions:
property itemModelᅟ: QAbstractItemModel

This property holds The item model used as a data source for the 3D surface..

Access functions:
property multiMatchBehaviorᅟ: QItemModelSurfaceDataProxy.MultiMatchBehavior

This property holds How multiple matches for each row/column combination are handled..

Defaults to Last.

For example, you might have an item model with timestamped data taken at irregular intervals and you want to visualize an average position of data items on each hour with a surface graph. This can be done by specifying row and column categories so that each surface point represents an hour, and setting this property to Average.

Access functions:
property rowCategoriesᅟ: list of strings

This property holds The row categories for the mapping..

Access functions:
property rowRoleᅟ: str

This property holds The item model role to map to the row category..

In addition to defining which row the data belongs to, the value indicated by the row role is also set as the Z-coordinate value of QSurfaceDataItem when model data is resolved, unless a separate z-position role is also defined.

Access functions:
property rowRolePatternᅟ: QRegularExpression

This property holds Whether a search and replace is performed on the value mapped by the row role before it is used as a row category..

This property specifies the regular expression to find the portion of the mapped value to replace and the rowRoleReplace property contains the replacement string.

Access functions:
property rowRoleReplaceᅟ: str

This property holds The replacement content to be used in conjunction with the row role pattern..

Defaults to an empty string. For more information on how the search and replace using regular expressions works, see QString::replace(const QRegularExpression &rx, const QString &after) function documentation.

Access functions:
property useModelCategoriesᅟ: bool

This property holds Whether row and column roles and categories are used for mapping..

When set to true, the mapping ignores row and column roles and categories, and uses the rows and columns from the model instead. Defaults to false.

Access functions:
property xPosRoleᅟ: str

This property holds The item model role to map to the X position..

If this role is not defined, columnRole is used to determine the X-coordinate value of the resolved QSurfaceDataItem objects.

Access functions:
property xPosRolePatternᅟ: QRegularExpression

This property holds Whether a search and replace is done on the value mapped by the x position role before it is used as an item position value..

This property specifies the regular expression to find the portion of the mapped value to replace and the xPosRoleReplace property contains the replacement string.

Access functions:
property xPosRoleReplaceᅟ: str

This property holds The replacement content to be used in conjunction with an x position role pattern..

Defaults to an empty string. For more information on how the search and replace using regular expressions works, see the QString::replace(const QRegularExpression &rx, const QString &after) function documentation.

Access functions:
property yPosRoleᅟ: str

This property holds The item model role to map to the Y position..

Access functions:
property yPosRolePatternᅟ: QRegularExpression

This property holds Whether a search and replace is done on the value mapped by the y position role before it is used as an item position value..

This property specifies the regular expression to find the portion of the mapped value to replace and the yPosRoleReplace property contains the replacement string.

Access functions:
property yPosRoleReplaceᅟ: str

This property holds The replacement content to be used in conjunction with an y position role pattern..

Defaults to an empty string. For more information on how the search and replace using regular expressions works, see the QString::replace(const QRegularExpression &rx, const QString &after) function documentation.

Access functions:
property zPosRoleᅟ: str

This property holds The item model role to map to the Z position..

If this role is not defined, rowRole is used to determine the Z-coordinate value of resolved QSurfaceDataItem objects.

Access functions:
property zPosRolePatternᅟ: QRegularExpression

This property holds Whether a search and replace is done on the value mapped by the z position role before it is used as an item position value..

This property specifies the regular expression to find the portion of the mapped value to replace and the zPosRoleReplace property contains the replacement string.

Access functions:
property zPosRoleReplaceᅟ: str

This property holds The replacement content to be used in conjunction with a z position role pattern..

Defaults to an empty string. For more information on how the search and replace using regular expressions works, see the QString::replace(const QRegularExpression &rx, const QString &after) function documentation.

Access functions:
__init__([parent=None])
Parameters:

parent – QObject

Constructs QItemModelSurfaceDataProxy with an optional parent.

__init__(itemModel[, parent=None])
Parameters:

Constructs QItemModelSurfaceDataProxy with itemModel and an optional parent. The proxy doesn’t take ownership of the itemModel, as typically item models are owned by other controls.

__init__(itemModel, yPosRole[, parent=None])
Parameters:

Constructs QItemModelSurfaceDataProxy with itemModel and an optional parent. The proxy doesn’t take ownership of the itemModel, as typically item models are owned by other controls. The yPosRole role is set to yPosRole. This constructor is meant to be used with models that have data properly sorted in rows and columns already, so it also sets useModelCategories property to true.

__init__(itemModel, rowRole, columnRole, yPosRole[, parent=None])
Parameters:

Constructs QItemModelSurfaceDataProxy with itemModel and an optional parent. The proxy doesn’t take ownership of the itemModel, as typically item models are owned by other controls. The role mappings are set with rowRole, columnRole, and yPosRole. The zPosRole and the xPosRole are set to rowRole and columnRole, respectively.

__init__(itemModel, rowRole, columnRole, xPosRole, yPosRole, zPosRole[, parent=None])
Parameters:

  • itemModel – QAbstractItemModel

  • rowRole – str

  • columnRole – str

  • xPosRole – str

  • yPosRole – str

  • zPosRole – str

  • parent – QObject

Constructs QItemModelSurfaceDataProxy with itemModel and an optional parent. The proxy doesn’t take ownership of the itemModel, as typically item models are owned by other controls. The role mappings are set with rowRole, columnRole, xPosRole, yPosRole, and zPosRole.

__init__(itemModel, rowRole, columnRole, yPosRole, rowCategories, columnCategories[, parent=None])
Parameters:

  • itemModel – QAbstractItemModel

  • rowRole – str

  • columnRole – str

  • yPosRole – str

  • rowCategories – list of strings

  • columnCategories – list of strings

  • parent – QObject

Constructs QItemModelSurfaceDataProxy with itemModel and an optional parent. The proxy doesn’t take ownership of the itemModel, as typically item models are owned by other controls. The role mappings are set with rowRole, columnRole, and yPosRole. The zPosRole and the xPosRole are set to rowRole and columnRole, respectively. Row and column categories are set with rowCategories and columnCategories. This constructor also sets autoRowCategories and autoColumnCategories to false.

__init__(itemModel, rowRole, columnRole, xPosRole, yPosRole, zPosRole, rowCategories, columnCategories[, parent=None])
Parameters:

  • itemModel – QAbstractItemModel

  • rowRole – str

  • columnRole – str

  • xPosRole – str

  • yPosRole – str

  • zPosRole – str

  • rowCategories – list of strings

  • columnCategories – list of strings

  • parent – QObject

Constructs QItemModelSurfaceDataProxy with itemModel and an optional parent. The proxy doesn’t take ownership of the itemModel, as typically item models are owned by other controls. The role mappings are set with rowRole, columnRole, xPosRole, yPosRole, and zPosRole. Row and column categories are set with rowCategories and columnCategories. This constructor also sets autoRowCategories and autoColumnCategories to false.

autoColumnCategories()
Return type:

bool

See also

setAutoColumnCategories()

Getter of property autoColumnCategoriesᅟ .

autoColumnCategoriesChanged(enable)
Parameters:

enable – bool

Notification signal of property autoColumnCategoriesᅟ .

autoRowCategories()
Return type:

bool

See also

setAutoRowCategories()

Getter of property autoRowCategoriesᅟ .

autoRowCategoriesChanged(enable)
Parameters:

enable – bool

Notification signal of property autoRowCategoriesᅟ .

columnCategories()
Return type:

list of strings

See also

setColumnCategories()

Getter of property columnCategoriesᅟ .

columnCategoriesChanged()

Notification signal of property columnCategoriesᅟ .

columnCategoryIndex(category)
Parameters:

category – str

Return type:

int

Returns the index of the specified category in the column categories list. If the category is not found, -1 is returned.

Note

If the automatic column categories generation is in use, this method will not return a valid index before the data in the model is resolved for the first time.

columnRole()
Return type:

str

See also

setColumnRole()

Getter of property columnRoleᅟ .

columnRoleChanged(role)
Parameters:

role – str

Notification signal of property columnRoleᅟ .

columnRolePattern()
Return type:

QRegularExpression

See also

setColumnRolePattern()

Getter of property columnRolePatternᅟ .

columnRolePatternChanged(pattern)
Parameters:

pattern – QRegularExpression

Notification signal of property columnRolePatternᅟ .

columnRoleReplace()
Return type:

str

See also

setColumnRoleReplace()

Getter of property columnRoleReplaceᅟ .

columnRoleReplaceChanged(replace)
Parameters:

replace – str

Notification signal of property columnRoleReplaceᅟ .

itemModel()
Return type:

QAbstractItemModel

See also

setItemModel()

Getter of property itemModelᅟ .

itemModelChanged(itemModel)
Parameters:

itemModel – QAbstractItemModel

Notification signal of property itemModelᅟ .

multiMatchBehavior()
Return type:

MultiMatchBehavior

See also

setMultiMatchBehavior()

Getter of property multiMatchBehaviorᅟ .

multiMatchBehaviorChanged(behavior)
Parameters:

behavior – MultiMatchBehavior

Notification signal of property multiMatchBehaviorᅟ .

remap(rowRole, columnRole, xPosRole, yPosRole, zPosRole, rowCategories, columnCategories)
Parameters:

  • rowRole – str

  • columnRole – str

  • xPosRole – str

  • yPosRole – str

  • zPosRole – str

  • rowCategories – list of strings

  • columnCategories – list of strings

Changes rowRole, columnRole, xPosRole, yPosRole, zPosRole, rowCategories and columnCategories to the mapping.

rowCategories()
Return type:

list of strings

See also

setRowCategories()

Getter of property rowCategoriesᅟ .

rowCategoriesChanged()

Notification signal of property rowCategoriesᅟ .

rowCategoryIndex(category)
Parameters:

category – str

Return type:

int

Returns the index of the specified category in the row categories list. If the row categories list is empty, -1 is returned.

Note

If the automatic row categories generation is in use, this method will not return a valid index before the data in the model is resolved for the first time.

rowRole()
Return type:

str

See also

setRowRole()

Getter of property rowRoleᅟ .

rowRoleChanged(role)
Parameters:

role – str

Notification signal of property rowRoleᅟ .

rowRolePattern()
Return type:

QRegularExpression

See also

setRowRolePattern()

Getter of property rowRolePatternᅟ .

rowRolePatternChanged(pattern)
Parameters:

pattern – QRegularExpression

Notification signal of property rowRolePatternᅟ .

rowRoleReplace()
Return type:

str

See also

setRowRoleReplace()

Getter of property rowRoleReplaceᅟ .

rowRoleReplaceChanged(replace)
Parameters:

replace – str

Notification signal of property rowRoleReplaceᅟ .

setAutoColumnCategories(enable)
Parameters:

enable – bool

See also

autoColumnCategories()

Setter of property autoColumnCategoriesᅟ .

setAutoRowCategories(enable)
Parameters:

enable – bool

See also

autoRowCategories()

Setter of property autoRowCategoriesᅟ .

setColumnCategories(categories)
Parameters:

categories – list of strings

See also

columnCategories()

Setter of property columnCategoriesᅟ .

setColumnRole(role)
Parameters:

role – str

See also

columnRole()

Setter of property columnRoleᅟ .

setColumnRolePattern(pattern)
Parameters:

pattern – QRegularExpression

See also

columnRolePattern()

Setter of property columnRolePatternᅟ .

setColumnRoleReplace(replace)
Parameters:

replace – str

See also

columnRoleReplace()

Setter of property columnRoleReplaceᅟ .

setItemModel(itemModel)
Parameters:

itemModel – QAbstractItemModel

Sets the item model to itemModel. Does not take ownership of the model, but does connect to it to listen for changes.

See also

itemModel()

Setter of property itemModelᅟ .

setMultiMatchBehavior(behavior)
Parameters:

behavior – MultiMatchBehavior

See also

multiMatchBehavior()

Setter of property multiMatchBehaviorᅟ .

setRowCategories(categories)
Parameters:

categories – list of strings

See also

rowCategories()

Setter of property rowCategoriesᅟ .

setRowRole(role)
Parameters:

role – str

See also

rowRole()

Setter of property rowRoleᅟ .

setRowRolePattern(pattern)
Parameters:

pattern – QRegularExpression

See also

rowRolePattern()

Setter of property rowRolePatternᅟ .

setRowRoleReplace(replace)
Parameters:

replace – str

See also

rowRoleReplace()

Setter of property rowRoleReplaceᅟ .

setUseModelCategories(enable)
Parameters:

enable – bool

See also

useModelCategories()

Setter of property useModelCategoriesᅟ .

setXPosRole(role)
Parameters:

role – str

See also

xPosRole()

Setter of property xPosRoleᅟ .

setXPosRolePattern(pattern)
Parameters:

pattern – QRegularExpression

See also

xPosRolePattern()

Setter of property xPosRolePatternᅟ .

setXPosRoleReplace(replace)
Parameters:

replace – str

See also

xPosRoleReplace()

Setter of property xPosRoleReplaceᅟ .

setYPosRole(role)
Parameters:

role – str

See also

yPosRole()

Setter of property yPosRoleᅟ .

setYPosRolePattern(pattern)
Parameters:

pattern – QRegularExpression

See also

yPosRolePattern()

Setter of property yPosRolePatternᅟ .

setYPosRoleReplace(replace)
Parameters:

replace – str

See also

yPosRoleReplace()

Setter of property yPosRoleReplaceᅟ .

setZPosRole(role)
Parameters:

role – str

See also

zPosRole()

Setter of property zPosRoleᅟ .

setZPosRolePattern(pattern)
Parameters:

pattern – QRegularExpression

See also

zPosRolePattern()

Setter of property zPosRolePatternᅟ .

setZPosRoleReplace(replace)
Parameters:

replace – str

See also

zPosRoleReplace()

Setter of property zPosRoleReplaceᅟ .

useModelCategories()
Return type:

bool

See also

setUseModelCategories()

Getter of property useModelCategoriesᅟ .

useModelCategoriesChanged(enable)
Parameters:

enable – bool

Notification signal of property useModelCategoriesᅟ .

xPosRole()
Return type:

str

See also

setXPosRole()

Getter of property xPosRoleᅟ .

xPosRoleChanged(role)
Parameters:

role – str

Notification signal of property xPosRoleᅟ .

xPosRolePattern()
Return type:

QRegularExpression

See also

setXPosRolePattern()

Getter of property xPosRolePatternᅟ .

xPosRolePatternChanged(pattern)
Parameters:

pattern – QRegularExpression

Notification signal of property xPosRolePatternᅟ .

xPosRoleReplace()
Return type:

str

See also

setXPosRoleReplace()

Getter of property xPosRoleReplaceᅟ .

xPosRoleReplaceChanged(replace)
Parameters:

replace – str

Notification signal of property xPosRoleReplaceᅟ .

yPosRole()
Return type:

str

See also

setYPosRole()

Getter of property yPosRoleᅟ .

yPosRoleChanged(role)
Parameters:

role – str

Notification signal of property yPosRoleᅟ .

yPosRolePattern()
Return type:

QRegularExpression

See also

setYPosRolePattern()

Getter of property yPosRolePatternᅟ .

yPosRolePatternChanged(pattern)
Parameters:

pattern – QRegularExpression

Notification signal of property yPosRolePatternᅟ .

yPosRoleReplace()
Return type:

str

See also

setYPosRoleReplace()

Getter of property yPosRoleReplaceᅟ .

yPosRoleReplaceChanged(replace)
Parameters:

replace – str

Notification signal of property yPosRoleReplaceᅟ .

zPosRole()
Return type:

str

See also

setZPosRole()

Getter of property zPosRoleᅟ .

zPosRoleChanged(role)
Parameters:

role – str

Notification signal of property zPosRoleᅟ .

zPosRolePattern()
Return type:

QRegularExpression

See also

setZPosRolePattern()

Getter of property zPosRolePatternᅟ .

zPosRolePatternChanged(pattern)
Parameters:

pattern – QRegularExpression

Notification signal of property zPosRolePatternᅟ .

zPosRoleReplace()
Return type:

str

See also

setZPosRoleReplace()

Getter of property zPosRoleReplaceᅟ .

zPosRoleReplaceChanged(replace)
Parameters:

replace – str

Notification signal of property zPosRoleReplaceᅟ .