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Class QAccelPlot::GridNode

ClassList > QAccelPlot > GridNode

Internal QSGNode responsible for rendering the plot grid into the scene graph. More...

  • #include <GridNode.hpp>

Inherits the following classes: QSGNode

Inheritance diagram

flowchart TB
  classQAccelPlot_1_1GridNode["QAccelPlot::GridNode"]

  external_base_classQAccelPlot_1_1GridNode_1["QSGNode"]
  external_base_classQAccelPlot_1_1GridNode_1 --> classQAccelPlot_1_1GridNode

Public Functions

Type Name
GridNode ()
Constructs a GridNode with empty sub-grid and main grid children.
void update (const Grid * grid, const Axis * xAxis, const Axis * yAxis, const QRectF & plotRect)
Recomputes and updates all grid geometry from the supplied configuration objects.

Detailed Description

Draws grid lines at the tick values from AxisTickPainter::computeTickValues(), the same values the axis places its tick marks at, so both stay aligned under all zoom levels, including log scale.

Keeps two child geometry nodes, sub-grid first and main grid second, for its whole lifetime and updates them in place. A hidden layer keeps its node with no vertices. Adding or removing nodes would make the Qt Quick renderer rebuild all batches and re-upload every series' vertex data.

Public Functions Documentation

function GridNode

Constructs a GridNode with empty sub-grid and main grid children. 

explicit QAccelPlot::GridNode::GridNode ()

function update

Recomputes and updates all grid geometry from the supplied configuration objects. 

void QAccelPlot::GridNode::update (
    const Grid * grid,
    const Axis * xAxis,
    const Axis * yAxis,
    const QRectF & plotRect
)

Parameters:

  • grid Grid configuration (line widths, visibility flags, colors).
  • xAxis Horizontal axis used to determine column positions.
  • yAxis Vertical axis used to determine row positions.
  • plotRect Plot area rectangle in item-local pixel coordinates.

The documentation for this class was generated from the following file QAccelPlot/src/QAccelPlot/grid/GridNode.hpp