# dpg-map

`dpg-map` is a Dear PyGui map widget package under rebuild.

The Step 6 overlay rendering layer is in place:

```python
import dpg_map as dpgm

provider = dpgm.TileProvider(
    name="custom",
    url_template="https://example.com/{z}/{x}/{y}.png",
    attribution="Tiles (c) Example",
)
dpgm.register_provider(provider)

with dpgm.map_widget(tag="map", center=(47.9029, 1.9093), zoom=15):
    dpgm.add_marker("vehicle", lat=47.9029, lon=1.9093)

dpgm.update_marker("vehicle", lat=47.9030, lon=1.9094, map_tag="map")
```

Implemented so far:

- public package exports
- tile provider definitions and registry
- Web Mercator projection helpers
- thread-safe logical map state and map registry
- command queue with coalescing for overlay and view updates
- logical marker, polyline, trajectory, and layer models
- persistent disk cache paths, metadata, scanning, pruning, and clearing
- Dear PyGui `child_window` + measured-size `drawlist` widget shell
- GUI-thread frame pump that drains commands, manages textures, and draws raster tiles
- sizing helpers that preserve the last non-zero size across hidden layouts
- asynchronous tile workers that read disk cache, fetch HTTP, and decode images
- memory cache with visible-tile protection and GUI-thread texture deletion
- measured-rectangle mouse interaction for left-drag panning and wheel zooming
- programmatic view commands and screen/latitude-longitude conversion helpers
- marker, polyline, and trajectory rendering on a draw layer separate from tiles
- background-thread overlay updates that coalesce without resetting center or zoom

Examples:

```bash
uv run python examples/basic_map.py
uv run python examples/sizing_window.py
uv run python examples/sizing_child.py
uv run python examples/sizing_table.py
uv run python examples/hidden_tab.py
uv run python examples/cache_stress.py
uv run python examples/markers_live_thread.py
uv run python examples/trajectory_live_thread.py
```