sec_interp.gui.preview_renderer module

Preview Renderer Module (PyQGIS Native).

Handles rendering of interactive previews using native QGIS resources. This module has been refactored to delegate specialized tasks to modular components.

class sec_interp.gui.preview_renderer.PreviewRenderer(canvas: QgsMapCanvas | None = None)

Bases: object

Renders interactive preview using native PyQGIS resources.

Acts as an orchestrator for several specialized modules: - PreviewLayerFactory: Handles layer creation and symbology. - PreviewAxesManager: Handles grid lines and axes labels. - PreviewOptimizer: Handles geometric simplification (LOD). - PreviewLegendRenderer: Handles legend drawing.

__init__(canvas: QgsMapCanvas | None = None) → None

Initialize preview renderer.

Parameters:

canvas – QgsMapCanvas instance (optional)

property active_units: dict[str, Any]

Expose active units from factory for legend compatibility.

cleanup() → None

Remove transient layers from the project and release resources.

Idempotent; safe to call on dialog close and plugin unload to avoid leaking temporary (memory) layers that trigger QGIS’s “scratch layers” warning on exit.

draw_legend(painter: qgis.PyQt.QtGui.QPainter, rect: qgis.PyQt.QtCore.QRectF) → None

Draw legend on the given painter honoring the configured layout.

legend_units() → list[tuple[str, str, Any, bool, str]]

Return (name, label, color, hidden, source) for known units, ordered.

source is "geology" or "drillholes"; a unit present in both is attributed to geology.

render(topo_data: ProfileData, geol_data: GeologyData | None = None, struct_data: StructureData | None = None, vert_exag: float = 1.0, dip_line_length: float | None = None, max_points: int = 1000, preserve_extent: bool = False, use_adaptive_sampling: bool = False, drillhole_data: list | None = None, interp_data: list[InterpretationPolygon] | None = None, topo_color_mode: str = 'gradient', topo_ramp_name: str | None = None, topo_single_color: str | None = None, topo_smooth_data: ProfileData | None = None, layer_styles: dict | None = None, hidden_interp_ids: set[str] | None = None) → tuple[QgsMapCanvas | None, list]

Render preview with all data layers.