QBarDataProxy

The QBarDataProxy class is the data proxy for a 3D bars graph. More…

Inherited by: QItemModelBarDataProxy

Synopsis

Functions

• def addRow (arg__1)

• def addRow (arg__1, arg__2)

• def addRows (rows)

• def addRows (rows, labels)

• def array ()

• def columnLabels ()

• def insertRow (arg__1, arg__2)

• def insertRow (arg__1, arg__2, arg__3)

• def insertRows (rowIndex, rows)

• def insertRows (rowIndex, rows, labels)

• def itemAt (position)

• def itemAt (rowIndex, columnIndex)

• def removeRows (rowIndex, removeCount[, removeLabels=true])

• def resetArray ()

• def resetArray (newArray)

• def resetArray (newArray, rowLabels, columnLabels)

• def rowAt (rowIndex)

• def rowCount ()

• def rowLabels ()

• def series ()

• def setColumnLabels (labels)

• def setItem (position, item)

• def setItem (rowIndex, columnIndex, item)

• def setRow (arg__1, arg__2)

• def setRow (arg__1, arg__2, arg__3)

• def setRowLabels (labels)

• def setRows (rowIndex, rows)

• def setRows (rowIndex, rows, labels)

Signals

• def arrayReset ()

• def columnLabelsChanged ()

• def itemChanged (rowIndex, columnIndex)

• def rowCountChanged (count)

• def rowLabelsChanged ()

• def rowsAdded (startIndex, count)

• def rowsChanged (startIndex, count)

• def rowsInserted (startIndex, count)

• def rowsRemoved (startIndex, count)

• def seriesChanged (series)

Detailed Description

A bar data proxy handles adding, inserting, changing, and removing rows of data.

The data array is a list of vectors (rows) of QBarDataItem instances. Each row can contain a different number of items or even be null.

QBarDataProxy takes ownership of all QtDataVisualization::QBarDataRow objects passed to it, whether directly or in a QtDataVisualization::QBarDataArray container. If bar data row pointers are used to directly modify data after adding the array to the proxy, the appropriate signal must be emitted to update the graph.

QBarDataProxy optionally keeps track of row and column labels, which QCategory3DAxis can utilize to show axis labels. The row and column labels are stored in a separate array from the data and row manipulation methods provide alternate versions that do not affect the row labels. This enables the option of having row labels that relate to the position of the data in the array rather than the data itself.

See also

Qt Data Visualization Data Handling

class PySide6.QtDataVisualization.QBarDataProxy([parent=None])

Parameters

parent – PySide6.QtCore.QObject

Constructs a bar data proxy with the given parent.

PySide6.QtDataVisualization.QBarDataProxy.addRow(arg__1, arg__2)

Parameters

• arg__1 –

• arg__2 – str

Return type

int

PySide6.QtDataVisualization.QBarDataProxy.addRow(arg__1)

Parameters

arg__1 –

Return type

int

PySide6.QtDataVisualization.QBarDataProxy.addRows(rows)

Parameters

rows – QBarDataArray

Return type

int

Adds the new rows to the end of an array. Existing row labels are not affected.

Returns the index of the first added row.

PySide6.QtDataVisualization.QBarDataProxy.addRows(rows, labels)

Parameters

• rows – QBarDataArray

• labels – list of strings

Return type

int

Adds the new rows with labels to the end of the array.

Returns the index of the first added row.

PySide6.QtDataVisualization.QBarDataProxy.array()

Return type

QBarDataArray

Returns the pointer to the data array.

PySide6.QtDataVisualization.QBarDataProxy.arrayReset()

PySide6.QtDataVisualization.QBarDataProxy.columnLabels()

Return type

list of strings

This property holds The optional column labels for the array..

Indexes in this array match column indexes in rows. If the list is shorter than the longest row, all columns will not get labels.

PySide6.QtDataVisualization.QBarDataProxy.columnLabelsChanged()

PySide6.QtDataVisualization.QBarDataProxy.insertRow(arg__1, arg__2)

Parameters

• arg__1 – int

• arg__2 –

PySide6.QtDataVisualization.QBarDataProxy.insertRow(arg__1, arg__2, arg__3)

Parameters

• arg__1 – int

• arg__2 –

• arg__3 – str

PySide6.QtDataVisualization.QBarDataProxy.insertRows(rowIndex, rows)

Parameters

• rowIndex – int

• rows – QBarDataArray

Inserts new rows into rowIndex. If rowIndex is equal to the array size, the rows are added to the end of the array. The existing row labels are not affected.

Note

The row labels array will be out of sync with the row array after this call if there were labeled rows beyond the inserted rows.

PySide6.QtDataVisualization.QBarDataProxy.insertRows(rowIndex, rows, labels)

Parameters

• rowIndex – int

• rows – QBarDataArray

• labels – list of strings

Inserts new rows with labels into rowIndex. If rowIndex is equal to the array size, the rows are added to the end of the array.

PySide6.QtDataVisualization.QBarDataProxy.itemAt(position)

Parameters

position – PySide6.QtCore.QPoint

Return type

PySide6.QtDataVisualization.QBarDataItem

Returns the pointer to the item at the position position. The x-value of position indicates the row and the y-value indicates the column. The item is guaranteed to be valid only until the next call that modifies data.

PySide6.QtDataVisualization.QBarDataProxy.itemAt(rowIndex, columnIndex)

Parameters

• rowIndex – int

• columnIndex – int

Return type

PySide6.QtDataVisualization.QBarDataItem

Returns the pointer to the item at the position specified by rowIndex and columnIndex. It is guaranteed to be valid only until the next call that modifies data.

PySide6.QtDataVisualization.QBarDataProxy.itemChanged(rowIndex, columnIndex)

Parameters

• rowIndex – int

• columnIndex – int

PySide6.QtDataVisualization.QBarDataProxy.removeRows(rowIndex, removeCount[, removeLabels=true])

Parameters

• rowIndex – int

• removeCount – int

• removeLabels – bool

Removes the number of rows specified by removeCount starting at the position rowIndex. Attempting to remove rows past the end of the array does nothing. If removeLabels is true, the corresponding row labels are also removed. Otherwise, the row labels are not affected.

Note

If removeLabels is false, the row labels array will be out of sync with the row array if there are labeled rows beyond the removed rows.

PySide6.QtDataVisualization.QBarDataProxy.resetArray()

Clears the existing array and row and column labels.

PySide6.QtDataVisualization.QBarDataProxy.resetArray(newArray)

Parameters

newArray – QBarDataArray

Takes ownership of the array newArray. Clears the existing array if the new array differs from it. If the arrays are the same, this function just triggers the arrayReset() signal.

Passing a null array deletes the old array and creates a new empty array. Row and column labels are not affected.

PySide6.QtDataVisualization.QBarDataProxy.resetArray(newArray, rowLabels, columnLabels)

Parameters

• newArray – QBarDataArray

• rowLabels – list of strings

• columnLabels – list of strings

Takes ownership of the array newArray. Clears the existing array if the new array differs from it. If the arrays are the same, this function just triggers the arrayReset() signal.

Passing a null array deletes the old array and creates a new empty array.

The rowLabels and columnLabels lists specify the new labels for rows and columns.

PySide6.QtDataVisualization.QBarDataProxy.rowAt(rowIndex)

Parameters

rowIndex – int

Return type

QList

Returns the pointer to the row at the position rowIndex. It is guaranteed to be valid only until the next call that modifies data.

PySide6.QtDataVisualization.QBarDataProxy.rowCount()

Return type

int

This property holds The number of rows in the array..

PySide6.QtDataVisualization.QBarDataProxy.rowCountChanged(count)

Parameters

count – int

PySide6.QtDataVisualization.QBarDataProxy.rowLabels()

Return type

list of strings

This property holds The optional row labels for the array..

Indexes in this array match the row indexes in the data array. If the list is shorter than the number of rows, all rows will not get labels.

PySide6.QtDataVisualization.QBarDataProxy.rowLabelsChanged()

PySide6.QtDataVisualization.QBarDataProxy.rowsAdded(startIndex, count)

Parameters

• startIndex – int

• count – int

PySide6.QtDataVisualization.QBarDataProxy.rowsChanged(startIndex, count)

Parameters

• startIndex – int

• count – int

PySide6.QtDataVisualization.QBarDataProxy.rowsInserted(startIndex, count)

Parameters

• startIndex – int

• count – int

PySide6.QtDataVisualization.QBarDataProxy.rowsRemoved(startIndex, count)

Parameters

• startIndex – int

• count – int

PySide6.QtDataVisualization.QBarDataProxy.series()

Return type

PySide6.QtDataVisualization.QBar3DSeries

This property holds The series this proxy is attached to..

PySide6.QtDataVisualization.QBarDataProxy.seriesChanged(series)

Parameters

series – PySide6.QtDataVisualization.QBar3DSeries

PySide6.QtDataVisualization.QBarDataProxy.setColumnLabels(labels)

Parameters

labels – list of strings

This property holds The optional column labels for the array..

Indexes in this array match column indexes in rows. If the list is shorter than the longest row, all columns will not get labels.

PySide6.QtDataVisualization.QBarDataProxy.setItem(position, item)

Parameters

• position – PySide6.QtCore.QPoint

• item – PySide6.QtDataVisualization.QBarDataItem

Changes a single item at the position position to the item item. The x-value of position indicates the row and the y-value indicates the column.

PySide6.QtDataVisualization.QBarDataProxy.setItem(rowIndex, columnIndex, item)

Parameters

• rowIndex – int

• columnIndex – int

• item – PySide6.QtDataVisualization.QBarDataItem

Changes a single item at the position specified by rowIndex and columnIndex to the item item.

PySide6.QtDataVisualization.QBarDataProxy.setRow(arg__1, arg__2)

Parameters

• arg__1 – int

• arg__2 –

PySide6.QtDataVisualization.QBarDataProxy.setRow(arg__1, arg__2, arg__3)

Parameters

• arg__1 – int

• arg__2 –

• arg__3 – str

PySide6.QtDataVisualization.QBarDataProxy.setRowLabels(labels)

Parameters

labels – list of strings

This property holds The optional row labels for the array..

Indexes in this array match the row indexes in the data array. If the list is shorter than the number of rows, all rows will not get labels.

PySide6.QtDataVisualization.QBarDataProxy.setRows(rowIndex, rows)

Parameters

• rowIndex – int

• rows – QBarDataArray

Changes existing rows by replacing the rows starting at the position rowIndex with the new rows specifies by rows. Existing row labels are not affected. The rows in the rows array can be the same as the existing rows already stored at rowIndex.

PySide6.QtDataVisualization.QBarDataProxy.setRows(rowIndex, rows, labels)

Parameters

• rowIndex – int

• rows – QBarDataArray

• labels – list of strings

Changes existing rows by replacing the rows starting at the position rowIndex with the new rows specifies by rows. The row labels are changed to labels. The rows in the rows array can be the same as the existing rows already stored at rowIndex.