*Not* using redux for mouseState.

src/components/mouse-handler.tsx

@@ -4,7 +4,6 @@ import { useDispatch, useSelector } from 'react-redux';
 import _ from 'lodash';
 
 import { slippyActions } from '../store/slippy';
-import { mouseHandlerActions } from '../store/mouse-handler';
 
 interface MouseHandlerProps {
   children: any;
@@ -21,9 +20,13 @@ const MouseHandler: react.FC<MouseHandlerProps> = (
     timestamp: number;
   }
 
-  const mouseState = useSelector(
-    (state: { mouseHandler: MouseState }) => state.mouseHandler
-  );
+  const initialMouseState = {
+    down: false,
+    starting: { x: -1, y: -1 },
+    timestamp: 0,
+  };
+
+  const [mouseState, setMouseState] = useState(initialMouseState);
 
   console.log('MouseHandler, mouseState: ' + JSON.stringify(mouseState));
 
@@ -43,30 +46,28 @@ const MouseHandler: react.FC<MouseHandlerProps> = (
   const mouseLeaveHandler = (event: any) => {
     genericHandler(event);
     //  throtteledMouseMoveHandler.cancel();
-    dispatch(mouseHandlerActions.init());
+    setMouseState(initialMouseState);
   };
 
   const mouseDownHandler = (event: any) => {
     event.preventDefault();
     genericHandler(event);
-    dispatch(
-      mouseHandlerActions.set({
+    setMouseState({
       down: true,
       starting: { x: event.pageX, y: event.pageY },
       timestamp: Date.now(),
-      })
-    );
+    });
   };
 
   const mouseUpHandler = (event: any) => {
     genericHandler(event);
     event.preventDefault();
-    dispatch(mouseHandlerActions.init());
+    setMouseState(initialMouseState);
   };
 
   const mouseMoveHandler = (event: any) => {
     event.preventDefault();
-    if (mouseState.down && (Date.now() - mouseState.timestamp) > 50 ) {
+    if (mouseState.down && Date.now() - mouseState.timestamp > 50) {
       genericHandler(event);
       console.log(
         `dispatch ${JSON.stringify({
@@ -81,16 +82,14 @@ const MouseHandler: react.FC<MouseHandlerProps> = (
         })
       );
 
-      dispatch(
-        mouseHandlerActions.set({
+      setMouseState({
         down: true,
         starting: {
           x: event.pageX,
           y: event.pageY,
         },
         timestamp: Date.now(),
-        })
-      );
+      });
     }
   };
 
@@ -99,8 +98,6 @@ const MouseHandler: react.FC<MouseHandlerProps> = (
   //   [mouseState.down, mouseState.starting.x, mouseState.starting.y]
   // );
 
-  
-
   const doubleClickHandler = (event: any) => {
     genericHandler(event);
     dispatch(

src/store/index.ts

@@ -1,10 +1,9 @@
 import { configureStore } from '@reduxjs/toolkit';
 
 import slippyReducer from './slippy';
-import mouseHandlerReducer from './mouse-handler';
 
 const store = configureStore({
-  reducer: { slippy: slippyReducer, mouseHandler: mouseHandlerReducer },
+  reducer: { slippy: slippyReducer},
 });
 
 export default store;

src/store/mouse-handler.ts

@@ -1,25 +0,0 @@
-import { createSlice } from '@reduxjs/toolkit';
-
-
-const initialMouseState = {
-    down: false,
-    starting: { x: -1, y: -1 },
-    timestamp:0,
-  };
-
-const mouseHandlerSlice = createSlice({
-  name: 'mouseHandler',
-  initialState: initialMouseState,
-  reducers: {
-    init(state) {
-      return initialMouseState;
-    },
-    set(state, action) {
-      return action.payload;
-    },
-  },
-});
-
-export const mouseHandlerActions = mouseHandlerSlice.actions;
-
-export default mouseHandlerSlice.reducer;