69 lines
2.4 KiB
Python
69 lines
2.4 KiB
Python
# flightmonitor/map/map_constants.py
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"""
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Constants related to map drawing, appearance, and behavior.
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"""
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from typing import Optional, Tuple
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# --- Map Drawing Colors and Styles ---
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# Colors for drawing boundaries on the map.
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DEM_BOUNDARY_COLOR: str = "red"
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DEM_BOUNDARY_THICKNESS_PX: int = 3
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AREA_BOUNDARY_COLOR: str = "blue"
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AREA_BOUNDARY_THICKNESS_PX: int = 2
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# Colors for text labels drawn on tiles (e.g., DEM tile names).
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TILE_TEXT_COLOR: str = "white"
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# Use RGBA for transparency in background if supported by PIL/ImageDraw
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TILE_TEXT_BG_COLOR: str = "rgba(0, 0, 0, 150)" # Semi-transparent black background
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# --- Map Labeling Constants ---
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# Base font size for map tile labels and the corresponding zoom level.
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# Font size will be scaled based on the current map zoom relative to this base zoom.
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DEM_TILE_LABEL_BASE_FONT_SIZE: int = 12
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DEM_TILE_LABEL_BASE_ZOOM: int = 10
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# Optional: Default font path for drawing text.
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# If None, ImageFont.load_default() will be used as the primary font source.
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# If a path is provided, MapCanvasManager/map_drawing might attempt to load
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# a TrueType font from this path, falling back to default if it fails.
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# Example: DEFAULT_LABEL_FONT_PATH = "/path/to/your/font.ttf"
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DEFAULT_LABEL_FONT_PATH: Optional[str] = None
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# --- Map Behavior Constants ---
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# Default zoom level when the map is initialized or reset if no BBox is set.
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DEFAULT_INITIAL_ZOOM: int = 7
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# Minimum and maximum allowed zoom levels for interactive pan/zoom.
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MIN_ZOOM_LEVEL: int = 0
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# Note: Max zoom is often determined by the map tile service,
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# this provides a fallback/hard limit if service info isn't available.
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DEFAULT_MAX_ZOOM_FALLBACK: int = 19
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# --- Placeholders and Fallbacks ---
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# Default color for placeholder tile images when a tile cannot be loaded.
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DEFAULT_PLACEHOLDER_COLOR_RGB: Tuple[int, int, int] = (220, 220, 220) # Light grey
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# --- Map Information Panel Formatting ---
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# Number of decimal places to display for coordinates in the info panel.
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COORDINATE_DECIMAL_PLACES: int = 5
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# MODIFIED: Add constant for decimal places for map size in km.
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# WHY: Centralize formatting constant for map info panel.
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# HOW: Added the constant.
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MAP_SIZE_KM_DECIMAL_PLACES: int = 1 # Number of decimal places for map size in km.
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# Define standard degree, minute, second symbols for DMS formatting
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DMS_DEGREE_SYMBOL: str = "°"
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DMS_MINUTE_SYMBOL: str = "'"
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DMS_SECOND_SYMBOL: str = "''"
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