step 5: add stable pan zoom and view commands

README.md

@@ -2,7 +2,7 @@
 
 `dpg-map` is a Dear PyGui map widget package under rebuild.
 
-The Step 4 tile manager is in place:
+The Step 5 interaction layer is in place:
 
 ```python
 import dpg_map as dpgm
@@ -32,12 +32,13 @@ Implemented so far:
 - 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
-- interaction hit-rectangle calculation for the measured map area
 - 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
 
-Overlay drawing is not implemented yet. Step 5 will add pan/zoom interaction and
-view command projection.
+Overlay drawing is not implemented yet. Step 6 will add overlay rendering and
+live update stress examples.
 
 Examples: