Olympe::GraphAutoLayout Class Reference

Applies a hierarchical layout to a TaskGraphTemplate in place. More...

#include <GraphAutoLayout.h>

Classes
struct	Layer
	A single layer in the hierarchical layout. More...

Static Public Member Functions
static void	ApplyHierarchicalLayout (TaskGraphTemplate &graph)
	Assigns screen-space positions to every node in graph.
static std::vector< Layer >	BuildLayers (const TaskGraphTemplate &graph)
	Builds layers via BFS from the entry point.
static void	AssignPositions (TaskGraphTemplate &graph, const std::vector< Layer > &layers)
	Assigns x/y positions from the layer structure.

Static Public Attributes
static constexpr float	SPACING_X = 220.0f
	Horizontal gap between columns (pixels).
static constexpr float	SPACING_Y = 130.0f
	Vertical gap between rows (pixels).
static constexpr float	ORIGIN_X = 100.0f
	X coordinate of the root (EntryPoint) column.
static constexpr float	ORIGIN_Y = 100.0f
	Y coordinate of the first row.

Static Private Member Functions
static void	SetPos (TaskNodeDefinition &node, float x, float y)
	Writes a float position into a node's Parameters map.

Detailed Description

Applies a hierarchical layout to a TaskGraphTemplate in place.

Typical usage:

GraphAutoLayout::ApplyHierarchicalLayout(myGraph);

Definition at line 44 of file GraphAutoLayout.h.

Member Function Documentation

ApplyHierarchicalLayout()

void Olympe::GraphAutoLayout::ApplyHierarchicalLayout ( TaskGraphTemplate &  graph )

static

Assigns screen-space positions to every node in graph.

Positions are written into each node's Parameters map under the keys "__posX" (float) and "__posY" (float) so they can be consumed by the editor canvas without touching the node's semantic fields.

If graph has no EntryPoint node, the first node in Nodes is used as the root. Disconnected (orphan) nodes are placed in an overflow column to the right of the main layout.

Parameters

graph

The graph whose nodes will be positioned.

Definition at line 170 of file GraphAutoLayout.cpp.

References AssignPositions(), BuildLayers(), and GetComponentTypeID_Static().

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AssignPositions()

void Olympe::GraphAutoLayout::AssignPositions ( TaskGraphTemplate &  graph, const std::vector< Layer > &  layers  )

static

Assigns x/y positions from the layer structure.

Parameters

graph	Graph whose nodes will be modified.
layers	Layer structure produced by BuildLayers().

Definition at line 137 of file GraphAutoLayout.cpp.

References GetComponentTypeID_Static(), Olympe::GraphAutoLayout::Layer::NodeIDs, ORIGIN_X, ORIGIN_Y, SetPos(), SPACING_X, and SPACING_Y.

Referenced by ApplyHierarchicalLayout().

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BuildLayers()

std::vector< GraphAutoLayout::Layer > Olympe::GraphAutoLayout::BuildLayers ( const TaskGraphTemplate &  graph )

static

Builds layers via BFS from the entry point.

Parameters

graph

Source graph.

Returns

Vector of layers; layer[0] contains the root node.

Definition at line 38 of file GraphAutoLayout.cpp.

References Olympe::EntryPoint, GetComponentTypeID_Static(), Olympe::NODE_INDEX_NONE, and Olympe::GraphAutoLayout::Layer::NodeIDs.

Referenced by ApplyHierarchicalLayout().

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SetPos()

void Olympe::GraphAutoLayout::SetPos ( TaskNodeDefinition &  node, float  x, float  y  )

staticprivate

Writes a float position into a node's Parameters map.

Definition at line 23 of file GraphAutoLayout.cpp.

References GetComponentTypeID_Static(), Olympe::Literal, and Olympe::ParameterBinding::Type.

Referenced by AssignPositions().

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Member Data Documentation

ORIGIN_X

constexpr float Olympe::GraphAutoLayout::ORIGIN_X = 100.0f

staticconstexpr

X coordinate of the root (EntryPoint) column.

Definition at line 54 of file GraphAutoLayout.h.

Referenced by AssignPositions().

ORIGIN_Y

constexpr float Olympe::GraphAutoLayout::ORIGIN_Y = 100.0f

staticconstexpr

Y coordinate of the first row.

Definition at line 57 of file GraphAutoLayout.h.

Referenced by AssignPositions().

SPACING_X

constexpr float Olympe::GraphAutoLayout::SPACING_X = 220.0f

staticconstexpr

Horizontal gap between columns (pixels).

Definition at line 48 of file GraphAutoLayout.h.

Referenced by AssignPositions().

SPACING_Y

constexpr float Olympe::GraphAutoLayout::SPACING_Y = 130.0f

staticconstexpr

Vertical gap between rows (pixels).

Definition at line 51 of file GraphAutoLayout.h.

Referenced by AssignPositions().

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The documentation for this class was generated from the following files:

• Source/BlueprintEditor/GraphAutoLayout.h
• Source/BlueprintEditor/GraphAutoLayout.cpp