something WIP

platform/core/src/ViewModelContext.js

@@ -0,0 +1,47 @@
+import React, { Component, useContext } from 'react';
+
+/// TODO MAKE THIS PRETTY DANNY
+
+const ViewModelContext = React.createContext({
+  displaySetInstanceUids: [],
+  setDisplaySetInstanceUids: () => {},
+  toolBarLayout: [],
+  setToolBarLayout: () => {},
+});
+
+ViewModelContext.displayName = 'ViewModelContext';
+
+class ViewModelProvider extends Component {
+  state = {
+    displaySetInstanceUids: [],
+  };
+
+  render() {
+    const setDisplaySetInstanceUids = displaySetInstanceUids => {
+      this.setState({ displaySetInstanceUids });
+    };
+
+    const setToolBarLayout = toolBarLayout => {
+      this.setState({ toolBarLayout });
+    };
+
+    return (
+      <ViewModelContext.Provider
+        value={{
+          displaySetInstanceUids: this.state.displaySetInstanceUids,
+          setDisplaySetInstanceUids,
+          toolBarLayout: this.state.toolBarLayout,
+          setToolBarLayout,
+        }}
+      >
+        {this.props.children}
+      </ViewModelContext.Provider>
+    );
+  }
+}
+
+const useViewModel = () => useContext(ViewModelContext);
+
+export default ViewModelContext;
+
+export { ViewModelProvider, useViewModel };