TypeScript Behaviour.derive方法代碼示例

export default function () {
  const makeGroup = function (gSpec) {
    const scrollClass = gSpec.scrollable === true ? '${prefix}-toolbar-scrollable-group' : '';
    return {
      dom: UiDomFactory.dom('<div aria-label="' + gSpec.label + '" class="${prefix}-toolbar-group ' + scrollClass + '"></div>'),

      tgroupBehaviours: Behaviour.derive([
        AddEventsBehaviour.config('adhoc-scrollable-toolbar', gSpec.scrollable === true ? [
          AlloyEvents.runOnInit(function (component, simulatedEvent) {
            Css.set(component.element(), 'overflow-x', 'auto');
            Scrollables.markAsHorizontal(component.element());
            Scrollable.register(component.element());
          })
        ] : [ ])
      ]),

      components: [
        Container.sketch({
          components: [
            ToolbarGroup.parts().items({ })
          ]
        })
      ],
      markers: {
        // TODO: Now that alloy isn't marking the items with the old
        // itemClass here, this navigation probably doesn't work. But
        // it's mobile. However, bluetooth keyboards will need to be fixed
        // Essentially, all items put in the toolbar will need to be given
        // this class if they are to be part of keyboard navigation
        itemSelector: '.' + Styles.resolve('toolbar-group-item')
      },

      items: gSpec.items
    };
  };

  const toolbar = GuiFactory.build(
    Toolbar.sketch(
      {
        dom: UiDomFactory.dom('<div class="${prefix}-toolbar"></div>'),
        components: [
          Toolbar.parts().groups({ })
        ],
        toolbarBehaviours: Behaviour.derive([
          Toggling.config({
            toggleClass: Styles.resolve('context-toolbar'),
            toggleOnExecute: false,
            aria: {
              mode: 'none'
            }
          }),
          Keying.config({
            mode: 'cyclic'
          })
        ]),
        shell: true
      }
    )
  ) as AlloyComponent;

  const wrapper = GuiFactory.build(
    Container.sketch({
      dom: {
        classes: [ Styles.resolve('toolstrip') ]
      },
      components: [
        GuiFactory.premade(toolbar)
      ],
      containerBehaviours: Behaviour.derive([
        Toggling.config({
          toggleClass: Styles.resolve('android-selection-context-toolbar'),
          toggleOnExecute: false
        })
      ])
    })
  ) as AlloyComponent;

  const resetGroups = function () {
    Toolbar.setGroups(toolbar, initGroups.get());
    Toggling.off(toolbar);
  };

  const initGroups = Cell([ ]);

  const setGroups = function (gs) {
    initGroups.set(gs);
    resetGroups();
  };

  const createGroups = function (gs) {
    return Arr.map(gs, Fun.compose(ToolbarGroup.sketch, makeGroup));
  };

  const refresh = function () {
    // Toolbar.refresh is undefined
    // Toolbar.refresh(toolbar);
  };

  const setContextToolbar = function (gs) {
    Toggling.on(toolbar);
//.........這裏部分代碼省略.........

const makeSlider = function (spec) {
  const getColor = function (hue) {
    // Handle edges.
    if (hue < 0) {
      return 'black';
    } else if (hue > 360) {
      return 'white';
    } else {
      return 'hsl(' + hue + ', 100%, 50%)';
    }
  };

  // Does not fire change intentionally.
  const onInit = function (slider, thumb, value) {
    const color = getColor(value);
    Css.set(thumb.element(), 'background-color', color);
  };

  const onChange = function (slider, thumb, value) {
    const color = getColor(value);
    Css.set(thumb.element(), 'background-color', color);
    spec.onChange(slider, thumb, color);
  };

  return Slider.sketch({
    dom: UiDomFactory.dom('<div class="${prefix}-slider ${prefix}-hue-slider-container"></div>'),
    components: [
      Slider.parts()['left-edge'](UiDomFactory.spec('<div class="${prefix}-hue-slider-black"></div>')),
      Slider.parts().spectrum({
        dom: UiDomFactory.dom('<div class="${prefix}-slider-gradient-container"></div>'),
        components: [
          UiDomFactory.spec('<div class="${prefix}-slider-gradient"></div>')
        ],
        behaviours: Behaviour.derive([
          Toggling.config({
            toggleClass: Styles.resolve('thumb-active')
          })
        ])
      }),
      Slider.parts()['right-edge'](UiDomFactory.spec('<div class="${prefix}-hue-slider-white"></div>')),
      Slider.parts().thumb({
        dom: UiDomFactory.dom('<div class="${prefix}-slider-thumb"></div>'),
        behaviours: Behaviour.derive([
          Toggling.config({
            toggleClass: Styles.resolve('thumb-active')
          })
        ])
      })
    ],

    onChange,
    onDragStart (slider, thumb) {
      Toggling.on(thumb);
    },
    onDragEnd (slider, thumb) {
      Toggling.off(thumb);
    },
    onInit,
    stepSize: 10,
    min: 0,
    max: 360,
    getInitialValue: spec.getInitialValue,

    sliderBehaviours: Behaviour.derive([
      Receivers.orientation(Slider.refresh)
    ])
  });
};