maidr (version 0.1.2)

Ggplot2LineLayerProcessor: Final Line Layer Processor - Uses Actual SVG Structure

Description

Processes line plot layers using the actual gridSVG structure discovered: - Lines: GRID.polyline.61.1.1, GRID.polyline.61.1.2, GRID.polyline.61.1.3 - Points: geom_point.points.63.1.1 through geom_point.points.63.1.24 (grouped by series)

Super class

maidr::LayerProcessor -> Ggplot2LineLayerProcessor

Public fields

layer_info

Information about the layer being processed

last_result

The last processing result

Active bindings

layer_info

Information about the layer being processed

last_result

The last processing result

Methods

Public methods

• Ggplot2LineLayerProcessor$process()

• Ggplot2LineLayerProcessor$extract_data()

• Ggplot2LineLayerProcessor$extract_multiline_data()

• Ggplot2LineLayerProcessor$extract_single_line_data()

• Ggplot2LineLayerProcessor$get_group_column()

• Ggplot2LineLayerProcessor$generate_selectors()

• Ggplot2LineLayerProcessor$generate_multiline_selectors()

• Ggplot2LineLayerProcessor$generate_single_line_selector()

• Ggplot2LineLayerProcessor$find_main_polyline_grob()

• Ggplot2LineLayerProcessor$needs_reordering()

• Ggplot2LineLayerProcessor$clone()

Inherited methods

• maidr::LayerProcessor$apply_scale_mapping()
• maidr::LayerProcessor$extract_layer_axes()
• maidr::LayerProcessor$get_last_result()
• maidr::LayerProcessor$get_layer_index()
• maidr::LayerProcessor$initialize()
• maidr::LayerProcessor$reorder_layer_data()
• maidr::LayerProcessor$set_last_result()

---

Method process()

Usage

Ggplot2LineLayerProcessor$process(
  plot,
  layout,
  built = NULL,
  gt = NULL,
  scale_mapping = NULL,
  grob_id = NULL,
  panel_id = NULL,
  panel_ctx = NULL
)

Arguments

plot

The ggplot2 object

layout

Layout information

built

Built plot data (optional)

gt

Gtable object (optional)

scale_mapping

Scale mapping for faceted plots (optional)

grob_id

Grob ID for faceted plots (optional)

panel_id

Panel ID for faceted plots (optional)

Returns

List with data and selectors Extract data from line layer (single or multiline)

---

Method extract_data()

Usage

Ggplot2LineLayerProcessor$extract_data(
  plot,
  built = NULL,
  scale_mapping = NULL,
  panel_id = NULL
)

Arguments

plot

The ggplot2 object

built

Built plot data (optional)

scale_mapping

Scale mapping for faceted plots (optional)

panel_id

Panel ID for faceted plots (optional)

Returns

List of arrays, each containing series data points Extract data for multiple line series

---

Method extract_multiline_data()

Usage

Ggplot2LineLayerProcessor$extract_multiline_data(layer_data, plot)

Arguments

layer_data

The built layer data

plot

The original ggplot2 object

Returns

List of arrays, each containing series data Extract data for single line (backward compatibility)

---

Method extract_single_line_data()

Usage

Ggplot2LineLayerProcessor$extract_single_line_data(layer_data)

Arguments

layer_data

The built layer data

Returns

List containing single series data Get the grouping column name from plot mappings

---

Method get_group_column()

Usage

Ggplot2LineLayerProcessor$get_group_column(plot)

Arguments

plot

The ggplot2 object

Returns

Name of the grouping column Generate selectors using actual SVG structure

---

Method generate_selectors()

Usage

Ggplot2LineLayerProcessor$generate_selectors(
  plot,
  gt = NULL,
  grob_id = NULL,
  panel_ctx = NULL
)

Arguments

plot

The ggplot2 object

gt

Gtable object (optional)

grob_id

Grob ID for faceted plots (optional)

Returns

List of selectors for each series Generate selectors for multiline plots using actual structure

---

Method generate_multiline_selectors()

Usage

Ggplot2LineLayerProcessor$generate_multiline_selectors(base_id, num_series)

Arguments

base_id

The base ID from the grob (e.g., "61")

num_series

Number of series

Returns

List of selectors Generate selector for single line plot

---

Method generate_single_line_selector()

Usage

Ggplot2LineLayerProcessor$generate_single_line_selector(base_id)

Arguments

base_id

The base ID from the grob

Returns

List with single selector Find the main polyline grob (GRID.polyline.XX)

---

Method find_main_polyline_grob()

Usage

Ggplot2LineLayerProcessor$find_main_polyline_grob(gt)

Arguments

gt

The gtable to search

Returns

The main polyline grob or NULL Check if layer needs reordering

---

Method needs_reordering()

Usage

Ggplot2LineLayerProcessor$needs_reordering()

Returns

FALSE (line plots typically don't need reordering)

---

Method clone()

The objects of this class are cloneable with this method.

Usage

Ggplot2LineLayerProcessor$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.