Added route for camera zoom

openflexure_microscope/api/v1/blueprints/camera/__init__.py

@@ -2,7 +2,7 @@ from openflexure_microscope.api.v1.views import MicroscopeView
 
 from flask import Blueprint
 
-from . import capture, record, preview, config, overlay
+from . import capture, record, preview, config, function
 
 
 def construct_blueprint(microscope_obj):
@@ -31,9 +31,13 @@ def construct_blueprint(microscope_obj):
         '/preview/<string:operation>', 
         view_func=preview.GPUPreviewAPI.as_view('gpu_preview', microscope=microscope_obj))
 
-    # Overlay routes
+    # Function routes
     blueprint.add_url_rule(
         '/overlay', 
-        view_func=overlay.OverlayAPI.as_view('overlay', microscope=microscope_obj))
+        view_func=function.OverlayAPI.as_view('overlay', microscope=microscope_obj))
+
+    blueprint.add_url_rule(
+        '/zoom', 
+        view_func=function.ZoomAPI.as_view('zoom', microscope=microscope_obj))
 
     return(blueprint)

openflexure_microscope/api/v1/blueprints/camera/function.py

@@ -3,6 +3,56 @@ from openflexure_microscope.api.utilities import JsonPayload
 
 from flask import Response, Blueprint, jsonify, request, abort, url_for, redirect, send_file
 
+import logging
+
+
+class ZoomAPI(MicroscopeView):
+
+    def get(self):
+        """
+        Get the current zoom value
+
+        .. :quickref: Zoom; Get the zoom value
+
+        :>header Accept: application/json
+
+        :<header Content-Type: application/json
+        :status 200: preview started/stopped
+        """
+        zoom_value = self.microscope.camera.state['zoom_value']
+
+        return jsonify({'zoom_value': zoom_value})
+
+    def post(self):
+        """
+        Change the current zoom value
+
+        .. :quickref: Zoom; Set the zoom value
+
+        **Example requests**:
+
+        .. sourcecode:: http
+
+          POST /camera/zoom HTTP/1.1
+          Accept: application/json
+
+          {
+            "zoom_value": 2.5, 
+          }
+
+        :>header Accept: application/json
+
+        :<header Content-Type: application/json
+        :status 200: preview started/stopped
+        """
+        payload = JsonPayload(request)
+        zoom_value = payload.param('zoom_value', default=1.0, convert=float)
+
+        self.microscope.camera.set_zoom(zoom_value)
+
+        return jsonify(self.microscope.state)
+
+
 class OverlayAPI(MicroscopeView):
 
     def get(self):