Develop (#35)

* refactor(ts): add ReactFlowProps

* Refactor/grid.tsx (#24)

* chore(deps-dev): bump start-server-and-test from 1.10.4 to 1.10.5

Bumps [start-server-and-test](https://github.com/bahmutov/start-server-and-test) from 1.10.4 to 1.10.5.
- [Release notes](https://github.com/bahmutov/start-server-and-test/releases)
- [Commits](https://github.com/bahmutov/start-server-and-test/compare/v1.10.4...v1.10.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* chore(deps-dev): bump typescript from 3.6.3 to 3.6.4

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.6.3 to 3.6.4.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/compare/v3.6.3...v3.6.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* refactor: grid.js -> grid.tsx

* refactor(bg): remove unused renderer

* refactor(connectionline): use ts

* refactor(ts): edges

* chore(build): update

* Refactor/typescript (WIP) (#25)

* refactor(store): use ts

* refactor(edgewrapper): use ts

* fix(handle): provide onConnect default func

* refactor(nodeselection): use ts

* refactor(userselction): use ts

* refactor(plugins): use ts

* refactor(hooks): use ts

* refactor(nodes): use ts

* refactor(edgerenderer): use ts

* refactor(graphview): use ts

* refactor(utils): rename js to ts

* refactor(app): fix ts errors

* fix(ts): errors

* fix(app): ts errors

* refactor(app): ts erros

* refactor(app): ts errors

* fix(utils): removeElements

* feat(example): add empty renderer closes #34

* fix(connect): dont drag node on connect

* chore(build): update

src/hooks/useKeyPress.ts

@@ -0,0 +1,31 @@
+import { useState, useEffect } from 'react';
+
+import { isInputDOMNode } from '../utils';
+
+export default (keyCode: number) => {
+  const [keyPressed, setKeyPressed] = useState(false);
+
+  function downHandler(evt: KeyboardEvent) {
+    if (evt.keyCode === keyCode && !isInputDOMNode(evt)) {
+      setKeyPressed(true);
+    }
+  }
+
+  const upHandler = (evt: KeyboardEvent) => {
+    if (evt.keyCode === keyCode && !isInputDOMNode(evt)) {
+      setKeyPressed(false);
+    }
+  };
+
+  useEffect(() => {
+    window.addEventListener('keydown', downHandler);
+    window.addEventListener('keyup', upHandler);
+
+    return () => {
+      window.removeEventListener('keydown', downHandler);
+      window.removeEventListener('keyup', upHandler);
+    };
+  }, []);
+
+  return keyPressed;
+}