Merge branch 'master' of github-tsch-brown:browngraphicslab/Dash-Web

1 files changed, 37 insertions, 0 deletions

diff --git a/src/client/views/PreviewCursor.tsx b/src/client/views/PreviewCursor.tsx
new file mode 100644
index 000000000..ff8434681
--- /dev/null
+++ b/src/client/views/PreviewCursor.tsx
@@ -0,0 +1,37 @@
+import { action, observable } from 'mobx';
+import { observer } from 'mobx-react';
+import "normalize.css";
+import * as React from 'react';
+import "./PreviewCursor.scss";
+
+@observer
+export class PreviewCursor extends React.Component<{}> {
+    private _prompt = React.createRef<HTMLDivElement>();
+    //when focus is lost, this will remove the preview cursor
+    @action onBlur = (): void => {
+        PreviewCursor.Visible = false;
+        PreviewCursor.hide();
+    }
+
+    @observable static clickPoint = [0, 0];
+    @observable public static Visible = false;
+    @observable public static hide = () => { };
+    @action
+    public static Show(hide: any, x: number, y: number) {
+        this.clickPoint = [x, y];
+        this.hide = hide;
+        setTimeout(action(() => this.Visible = true), (1));
+    }
+    render() {
+        if (!PreviewCursor.clickPoint) {
+            return (null);
+        }
+        if (PreviewCursor.Visible && this._prompt.current) {
+            this._prompt.current.focus();
+        }
+        return <div className="previewCursor" id="previewCursor" onBlur={this.onBlur} tabIndex={0} ref={this._prompt}
+            style={{ transform: `translate(${PreviewCursor.clickPoint[0]}px, ${PreviewCursor.clickPoint[1]}px)`, opacity: PreviewCursor.Visible ? 1 : 0 }}>
+            I
+        </div >;
+    }
+}
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