鼠标

例子

基本用法

这个例子演示了对以下事件的处理：

• Enter & Leave
• Press & Release
• Move
• Hover

function formatMessagePointer(mp: MessagePointer) {    return `pos: (${mp.Position.x}, ${mp.Position.y})`;}
export function App() {    const [text, setText] = useState('out');    const refEntered = useRef(false);    const refPos = useRef(new Vec2(0, 0));
    const updateButton = () => {        setText(            `${                refEntered.current                    ? `at ${refPos.current.x}, ${refPos.current.y}`                    : 'out'            }`,        );    };
    const onPointerEnter: IButtonComponentProps['onPointerEnter'] = () => {        refEntered.current = true;        updateButton();    };
    const onPointerLeave: IButtonComponentProps['onPointerLeave'] = () => {        refEntered.current = false;        updateButton();    };
    const onPointerMove: IButtonComponentProps['onPointerMove'] = (        sender,        mp,    ) => {        refPos.current = mp.Position;        updateButton();    };
    const onPointerHover: IButtonComponentProps['onPointerHover'] = (        sender,        mp,    ) => {        console.log('on hover');    };
    const onPointerPress: IButtonComponentProps['onPointerPress'] = (        sender,        mp,    ) => {        console.log(`on press: ${formatMessagePointer(mp)}`);    };
    const onPointerRelease: IButtonComponentProps['onPointerRelease'] = (        sender,        mp,    ) => {        console.log(`on release: ${formatMessagePointer(mp)}`);    };
    return (        <Window>            <DemoLayout>                <Button                    text={text}                    onPointerRelease={onPointerRelease}                    onPointerPress={onPointerPress}                    onPointerHover={onPointerHover}                    onPointerMove={onPointerMove}                    onPointerEnter={onPointerEnter}                    onPointerLeave={onPointerLeave}                ></Button>            </DemoLayout>        </Window>    );}

API

export interface IControl extends IControlExtension {    //    OnPointerEnter(        fn: (sender: IControl, mp: MessagePointer) => void,    ): IControl;    OnPointerLeave(        fn: (sender: IControl, mp: MessagePointer) => void,    ): IControl;
    //    OnPointerPress(        fn: (sender: IControl, mp: MessagePointer) => void,    ): IControl;    OnPointerRelease(        fn: (sender: IControl, mp: MessagePointer) => void,    ): IControl;
    //    OnPointerMove(fn: (sender: IControl, mp: MessagePointer) => void): IControl;    OnPointerHover(        fn: (sender: IControl, mp: MessagePointer) => void,    ): IControl;}
export class MessagePointer {    // Common    Id: number;    Type: PointerType;    Position: Vec2;    Modifier: InputModifier;    Button: PointerButton;    Count: number;
    ...}