Compute bounding boxes for plot nodes based on text labels

This function measures label box sizes and convert to data units

Usage

compute_node_boxes(
  nodes,
  label_col = "label",
  text_size = 16.9,
  size.unit = "pt",
  fontface = "bold",
  padding_cm = 0.3,
  xlim,
  ylim,
  plot_width_cm = 20,
  plot_height_cm = 12
)

Arguments

nodes: A data frame containing the nodes to be processed. Must include the column specified by `label_col`.
label_col: Character string specifying the name of the column containing text labels for which boxes should be computed. Default is "label".
text_size: Numeric value specifying the text size in points (or mm if `size.unit` is "mm"). Default is 16.9.
size.unit: Character string specifying the unit for `text_size`. Supported values are "pt" (points) or "mm" (millimeters). Default is "pt".
fontface: Character string specifying the font face. Default is "bold". Can also be "plain", "italic", or "bold.italic".
padding_cm: Numeric value specifying the horizontal and vertical padding around the text in centimeters. Default is 0.3.
xlim: Numeric vector of length 2 specifying the x-axis limits of the plot.
ylim: Numeric vector of length 2 specifying the y-axis limits of the plot.
plot_width_cm: Numeric value specifying the total plot width in centimeters. Default is 20.
plot_height_cm: Numeric value specifying the total plot height in centimeters. Default is 12.

Value

A data frame containing the original `nodes` data with additional columns:

box_w_cm: Box width in centimeters
box_h_cm: Box height in centimeters
half_w: Half box width in data units (for centering)
half_h: Half box height in data units (for centering)