Added route for camera zoom

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

@@ -0,0 +1,105 @@
+from openflexure_microscope.api.v1.views import MicroscopeView
+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):
+        """
+        Get overlay text
+
+        .. :quickref: Overlay; Get camera overlay text
+
+        :>header Accept: application/json
+
+        :<header Content-Type: application/json
+        :status 200: preview started/stopped
+        """
+        text = self.microscope.camera.camera.annotate_text
+        size = self.microscope.camera.camera.annotate_text_size
+
+        return jsonify({'text': text, 'size': size})
+
+    def post(self):
+        """
+        Set overlay text
+
+        .. :quickref: Overlay; Set camera overlay text
+
+        **Example requests**:
+
+        .. sourcecode:: http
+
+          POST /camera/overlay HTTP/1.1
+          Accept: application/json
+
+          {
+            "text": "2019/01/15 14:48", 
+            "size": 50 
+          }
+
+        :>header Accept: application/json
+
+        :<header Content-Type: application/json
+        :status 200: preview started/stopped
+        """
+        
+        payload = JsonPayload(request)
+        text = payload.param('text', default="", convert=str)
+        size = payload.param('size', default=50, convert=int)
+
+        self.microscope.camera.camera.annotate_text = text
+        self.microscope.camera.camera.annotate_text_size = size
+
+        return jsonify({'text': text, 'size': size})