Add mouseMoveEvent, enterEvent and leaveEvent (#248)

* impl mouseMoveEvent, enterEvent and leaveEvent

* update example

* mention new mouse events in the docs

docs/components.md

@@ -24,4 +24,4 @@ desktop. More detailed information can be seen [here](components/Window.md)
 | TouchableHighlight       | activeOpacity, underlayColor, style, onPress, onLongPress |
 | TouchableOpacity         | activeOpacity, style, onPress, onLongPress                |
 | TouchableWithoutFeedback | onPress, onLongPress                                      |
-| View                     | style                                                     |
+| View                     | style, onMouseMove, onMouseEnter, onMouseLeave            |

src/backends/qt.ts

@@ -12,12 +12,34 @@ export function desktopSize(): Size {
 
 export abstract class BaseElement {
   element: any;
+  hasMouseTracking() {
+    return this.element.hasMouseTracking();
+  }
+  setMouseTracking(v: boolean) {
+    this.element.setMouseTracking(v);
+  }
   mousePressEvent(func: () => void) {
     this.element.mousePressEvent(func);
   }
   mouseReleaseEvent(func: () => void) {
     this.element.mouseReleaseEvent(func);
   }
+  mouseMoveEvent(func: (x: number, y: number) => void) {
+    // TODO: Mouse tracking should be turned of when the event handler
+    // is being removed (not changed to a new function)
+    // This probably needs teardown logic in propsUpdater function
+    if (!this.hasMouseTracking()) {
+      this.setMouseTracking(true);
+    }
+
+    this.element.mouseMoveEvent(func);
+  }
+  enterEvent(func: () => void) {
+    this.element.enterEvent(func);
+  }
+  leaveEvent(func: () => void) {
+    this.element.leaveEvent(func);
+  }
   setStyleSheet(obj: object) {
     this.element.setStyleSheet(convertStyleSheet(obj));
   }

src/components/View.ts

@@ -6,6 +6,24 @@ import convertStyleSheet from "../utils/convertStyleSheet";
 import { YogaComponent } from "./YogaComponent";
 import { getBackend } from "../backends/index";
 
+interface Point {
+  x: number;
+  y: number;
+}
+
+interface MouseMoveEvent {
+  point: Point;
+}
+
+interface Props {
+  style: React.CSSProperties;
+  onResponderGrant: () => void;
+  onResponderRelease: () => void;
+  onMouseMove: (event: MouseMoveEvent) => void;
+  onMouseEnter: () => void;
+  onMouseLeave: () => void;
+}
+
 declare global {
   namespace JSX {
     interface IntrinsicElements {
@@ -30,12 +48,18 @@ export default (p: Props) => {
   const propTypes = {
     style: PropTypes.object,
     onResponderGrant: PropTypes.func,
-    onResponderRelease: PropTypes.func
+    onResponderRelease: PropTypes.func,
+    onMouseMove: PropTypes.func,
+    onMouseEnter: PropTypes.func,
+    onMouseLeave: PropTypes.func
   };
   const defaultProps = {
     style: {},
     onResponderGrant: () => {},
-    onResponderRelease: () => {}
+    onResponderRelease: () => {},
+    onMouseMove: (event: MouseMoveEvent) => {},
+    onMouseEnter: () => {},
+    onMouseLeave: () => {}
   };
 
   const ViewElement = getBackend()["ViewElement"];
@@ -48,7 +72,10 @@ export default (p: Props) => {
 
   const handlers = {
     onResponderGrant: props.onResponderGrant,
-    onResponderRelease: props.onResponderRelease
+    onResponderRelease: props.onResponderRelease,
+    onMouseMove: props.onMouseMove,
+    onMouseEnter: props.onMouseEnter,
+    onMouseLeave: props.onMouseLeave
   };
 
   element.mousePressEvent(() => {
@@ -63,6 +90,18 @@ export default (p: Props) => {
     }
   });
 
+  element.mouseMoveEvent((x: number, y: number) => {
+    handlers.onMouseMove({ point: { x, y } });
+  });
+
+  element.enterEvent(() => {
+    handlers.onMouseEnter();
+  });
+
+  element.leaveEvent(() => {
+    handlers.onMouseLeave();
+  });
+
   const containerProps = Container(
     child => {
       child.element.setParent(element);
@@ -85,7 +124,13 @@ export default (p: Props) => {
   );
 
   const updateProps = propsUpdater(
-    [handlers, "onResponderGrant", "onResponderRelease"],
+    [
+      handlers,
+      "onResponderGrant",
+      "onResponderRelease",
+      "onMouseEnter",
+      "onMouseLeave"
+    ],
     {
       style: (style: React.CSSProperties) => {
         element.setStyleSheet(style);

testprog.js

@@ -22,6 +22,9 @@ class Example extends Component {
   state = {
     test: 'dsdasdsa',
     a: true,
+    mouseState: 'idle',
+    x: 50,
+    y: 50,
   };
   componentDidMount() {
     //setTimeout(() => this.setState({ test: "dsawewwww" }), 3000);
@@ -35,6 +38,9 @@ class Example extends Component {
           style={{ height: '25%', width: '25%', backgroundColor: 'blue' }}
         >
           <View
+            onMouseEnter={() => this.setState({ mouseState: 'MOUSE ENTERED' })}
+            onMouseLeave={() => this.setState({ mouseState: 'MOUSE LEFT' })}
+            onMouseMove={event => this.setState(event.point)}
             style={{ height: '50%', width: '100%', backgroundColor: 'green' }}
           >
             <Button
@@ -42,7 +48,17 @@ class Example extends Component {
               onPress={() => console.log('PRessed')}
               title="My button"
             />
-            <Text>Hello</Text>
+            <Text>{`Mouse state: ${this.state.mouseState}`}</Text>
+            <View
+              style={{
+                width: 40,
+                height: 40,
+                backgroundColor: 'black',
+                position: 'absolute',
+                top: this.state.y,
+                left: this.state.x,
+              }}
+            ></View>
           </View>
         </Window>
       </App>