# Wijmo_Angular2_Gauge.Wjradialgauge ## Content

WjRadialGauge Class

Angular 2 component for the wijmo.gauge.RadialGauge control.

Use the wj-radial-gauge component to add RadialGauge controls to your Angular 2 applications. For details about Angular 2 markup syntax, see Angular 2 Markup.

The WjRadialGauge component is derived from the RadialGauge control and inherits all its properties, events and methods.

The wj-radial-gauge component may contain a wijmo.angular2.gauge.WjRange child component.

Heirarchy

Properties

Methods

Events

Properties

asyncBindings

asyncBindings: boolean

Allows you to override the global WjOptions.asyncBindings setting for this specific component. See the WjOptions.WjOptions.asyncBindings property description for details.

autoScale

autoScale: boolean

Gets or sets a value that indicates whether the gauge automatically scales to fill the host element.

The default value for this property is true.

face

face: Range

Gets or sets the Range used to represent the gauge's overall geometry and appearance.

faceBounds

faceBounds: Rect

Gets the bounds of the gauge's face element.

This property is useful for positioning custom SVG elements on the gauge.

format

format: string

Gets or sets the format string used to display gauge values as text.

getText

getText: IGetGaugeText

Gets or sets a callback that returns customized strings used to display gauge values.

Use this property if you want to customize the strings shown on the gauge in cases where the format property is not enough.

If provided, the callback should be a function as that takes as parameters the gauge, the part name, the value, and the formatted value. The callback should return the string to be displayed on the gauge.

For example:

// callback to convert values into strings
gauge.getText = (gauge, part, value, text) => {
    switch (part) {
        case 'value':
            if (value <= 10) return 'Empty!';
            if (value <= 25) return 'Low...';
            if (value <= 95) return 'Good';
            return 'Full';
        case 'min':
            return 'EMPTY';
        case 'max':
           return 'FULL';
    }
    return text;
}

gotFocusNg

gotFocusNg: EventEmitter<any>

Angular (EventEmitter) version of the Wijmo gotFocus event for programmatic access. Use this event name if you want to subscribe to the Angular version of the event in code. In template bindings use the conventional gotFocus Wijmo event name.

handleWheel

handleWheel: boolean

Gets or sets a value that determines whether the user can edit the gauge value using the mouse wheel.

The default value for this property is true.

hasShadow

hasShadow: boolean

Gets or sets a value that indicates whether the gauge displays a shadow effect.

The default value for this property is true.

hostElement

hostElement: HTMLElement

Gets the DOM element that is hosting the control.

initialized

initialized: EventEmitter<any>

This event is triggered after the component has been initialized by Angular, that is all bound properties have been assigned and child components (if any) have been initialized.

invalidInputNg

invalidInputNg: EventEmitter<any>

Angular (EventEmitter) version of the Wijmo invalidInput event for programmatic access. Use this event name if you want to subscribe to the Angular version of the event in code. In template bindings use the conventional invalidInput Wijmo event name.

isAnimated

isAnimated: boolean

Gets or sets a value that determines whether the Gauge should use animation to show value changes.

The default value for this property is true.

isDisabled

isDisabled: boolean

Gets or sets a value that determines whether the control is disabled.

Disabled controls cannot get mouse or keyboard events.

isInitialized

isInitialized: boolean

Indicates whether the component has been initialized by Angular. Changes its value from false to true right before triggering the initialized event.

isReadOnly

isReadOnly: boolean

Gets or sets a value that indicates whether the user can edit the gauge value using the mouse and keyboard.

The default value for this property is true.

isTouching

isTouching: boolean

Gets a value that indicates whether the control is currently handling a touch event.

isUpdating

isUpdating: boolean

Gets a value that indicates whether the control is currently being updated.

lostFocusNg

lostFocusNg: EventEmitter<any>

Angular (EventEmitter) version of the Wijmo lostFocus event for programmatic access. Use this event name if you want to subscribe to the Angular version of the event in code. In template bindings use the conventional lostFocus Wijmo event name.

max

max: number

Gets or sets the maximum value that can be displayed on the gauge.

For details about using the min and max properties, please see the Using the min and max properties topic.

min

min: number

Gets or sets the minimum value that can be displayed on the gauge.

For details about using the min and max properties, please see the Using the min and max properties topic.

needleElement

needleElement: SVGElement

Gets or sets an SVGElement to be used as a needle for the Gauge.

If provided, the needle element should extend from 0 to 100 units in the X direction, and should typically be symmetrical about the Y axis.

When this property is set, the needle element becomes part of the gauge DOM and is removed from its original container. To use the same element in several gauges, use the clone method to create copies of the needle element.

needleLength

needleLength: NeedleLength

Gets or sets a value that determines the length of the gauge's needleElement with respect to the pointer range.

The default value for this property is NeedleLength.Middle.

needleShape

needleShape: NeedleShape

Gets or sets a value that determines the shape of the gauge's needle element.

Use this property to select one of the pre-defined needle shapes. The pre-defined shapes are created using the createNeedleElement method.

You can also create custom needle elements by setting the needleElement property to custom elements created using the createNeedleElement method with parameters of your choice, or to custom SVG group elements created using whatever method you prefer.

You can style the needle using CSS. For example:

.wj-gauge .wj-needle {
    fill: orangered;
    stroke: orangered;
}
.wj-gauge .wj-needle .wj-inner-needle-cap {
    fill: white;
}

The default value for this property is NeedleShape.None.

origin

origin: number

Gets or sets the starting point used for painting the range.

By default, this property is set to null, which causes the value range to start at the gauge's minimum value, or zero if the minimum is less than zero.

pointer

pointer: Range

Gets or sets the Range used to represent the gauge's current value.

ranges

ranges: ObservableArray

Gets the collection of ranges in this gauge.

refreshedNg

refreshedNg: EventEmitter<any>

Angular (EventEmitter) version of the Wijmo refreshed event for programmatic access. Use this event name if you want to subscribe to the Angular version of the event in code. In template bindings use the conventional refreshed Wijmo event name.

refreshingNg

refreshingNg: EventEmitter<any>

Angular (EventEmitter) version of the Wijmo refreshing event for programmatic access. Use this event name if you want to subscribe to the Angular version of the event in code. In template bindings use the conventional refreshing Wijmo event name.

rightToLeft

rightToLeft: boolean

Gets a value indicating whether the control is hosted in an element with right-to-left layout.

showRanges

showRanges: boolean

Gets or sets a value that indicates whether the gauge displays the ranges contained in the ranges property.

If this property is set to false, the ranges contained in the ranges property are not displayed in the gauge. Instead, they are used to interpolate the color of the pointer range while animating value changes.

The default value for this property is true.

showText

showText: ShowText

Gets or sets the ShowText values to display as text in the gauge.

The default value for this property is ShowText.All for RadialGauge controls, and to ShowText.None for LinearGauge controls.

showTickText

showTickText: boolean

Gets or sets a property that determines whether the gauge should display the text value of each tick mark.

You can use CSS to style the tickmark text:

.wj-gauge .wj-tick-text text {
    opacity: 1;
    font-family: Courier;
    font-size: 8pt;
    fill: purple;
}

See also the showTicks and tickSpacing properties.

The default value for this property is false.

showTicks

showTicks: boolean

Gets or sets a property that determines whether the gauge should display tickmarks at each step (or tickSpacing) value.

The tickmarks can be formatted in CSS using the wj-gauge and wj-ticks class names. For example:

.wj-gauge .wj-ticks {
    stroke-width: 2px;
    stroke: white;
}

The default value for this property is **false.

stackRanges

stackRanges: boolean

Gets or sets a value that determines whether the ranges contained in the ranges collection should be stacked within the gauge.

By default, stackRanges is set to false, and the ranges in the ranges collection are displayed with the same thickness as the gauge's face.

Setting stackRanges to true causes the ranges to become narrower, and to be displayed side-by-side.

startAngle

startAngle: number

Gets or sets the starting angle for the gauge.

Angles are measured in degrees, clockwise, starting from the 9 o'clock position.

The default value for this property is 0.

step

step: number

Gets or sets the amount to add to or subtract from the value property when the user presses the arrow keys or moves the mouse wheel.

sweepAngle

sweepAngle: number

Gets or sets the sweep angle for the gauge.

Angles are measured in degrees, clockwise, starting from the 9 o'clock position.

The default value for this property is 180 degrees.

tabOrder

tabOrder: number

Gets or sets a value of the tabindex attribute associated with the control.

tabindex attribute value can be defined statically for a Wijmo control by specifying it on the control's host HTML element. But this value can't be changed later during application lifecycle, because Wijmo controls have complex structure, and the control may need to propagate this attribute value to its internal element to work properly.

Because of this, to read or change control's tabindex dynamically, you should do it using this property.

thickness

thickness: number

Gets or sets the thickness of the gauge, on a scale between zero and one.

Setting the thickness to one causes the gauge to fill as much of the control area as possible. Smaller values create thinner gauges.

thumbSize

thumbSize: number

Gets or sets the size of the element that shows the gauge's current value, in pixels.

tickSpacing

tickSpacing: number

Gets or sets the spacing between tickmarks.

Set the showTicks property to true if you want the gauge to show tickmarks along its face. By default, the interval between tickmarks is defined by the step property.

Use the tickSpacing property to override the default and use a spacing that is different from the step value. Set the tickSpacing property to null to revert to the default behavior.

value

value: number

Gets or sets the value displayed on the gauge.

valueChangePC

valueChangePC: EventEmitter<any>

This event is used to implement two-way binding to the value property. It's triggered when the property value changes, with the event argument holding the new property value. You can bind handlers to this event in templates using the valueChange event name.

valueChangedNg

valueChangedNg: EventEmitter<any>

Angular (EventEmitter) version of the Wijmo valueChanged event for programmatic access. Use this event name if you want to subscribe to the Angular version of the event in code. In template bindings use the conventional valueChanged Wijmo event name.

wjModelProperty

wjModelProperty: string

Defines a name of a property represented by [(ngModel)] directive (if specified). Default value is 'value'.

Static controlTemplate

controlTemplate: string

Gets or sets the template used to instantiate RadialGauge control.

Methods

applyTemplate

  • applyTemplate(classNames: string, template: string, parts: Object, namePart?: string): HTMLElement

  • Applies the template to a new instance of a control, and returns the root element.

    This method should be called by constructors of templated controls. Therefore, this method is not available. It is responsible for binding the template parts to the corresponding control members.

    For example, the code below applies a template to an instance of an InputNumber control. The template must contain elements with the 'wj-part' attribute set to 'input', 'btn-inc', and 'btn-dec'. The control members '_tbx', '_btnUp', and '_btnDn' will be assigned references to these elements.

    this.applyTemplate('wj-control wj-inputnumber', templateString, {
  _tbx: 'input',
  _btnUp: 'btn-inc',
  _btnDn: 'btn-dec'
}, 'input');

    @param classNames Names of classes to add to the control's host element. @param template An HTML string that defines the control template. @param parts A dictionary of part variables and their names. @param namePart Name of the part to be named after the host element. This determines how the control submits data when used in forms.

    Parameters

    • classNames: string
    • template: string
    • parts: Object
    • Optional namePart: string

    Returns HTMLElement

beginUpdate

  • beginUpdate(): void

containsFocus

  • containsFocus(): boolean

  • Checks whether this control contains the focused element.

    Returns boolean

created

  • created(): void

  • If you create a custom component inherited from a Wijmo component, you can override this method and perform necessary initializations that you usually do in a class constructor. This method is called in the last line of a Wijmo component constructor and allows you to not declare your custom component's constructor at all, thus preventing you from a necessity to maintain constructor parameters and keep them in synch with Wijmo component's constructor parameters.

    Returns void

deferUpdate

  • deferUpdate(fn: Function): void

  • Executes a function within a beginUpdate/endUpdate block.

    The control will not be updated until the function has been executed. This method ensures endUpdate is called even if the function throws an exception.

    Parameters

    • fn: Function

      Function to be executed.

    Returns void

dispose

  • dispose(): void

  • Disposes of the control by removing its association with the host element.

    The dispose method automatically removes any event listeners added with the addEventListener method.

    Calling the dispose method is important in applications that create and remove controls dynamically. Failing to dispose of the controls may cause memory leaks.

    Returns void

endUpdate

  • endUpdate(shouldInvalidate?: boolean): void

  • Resumes notifications suspended by calls to beginUpdate.

    Parameters

    • Optional shouldInvalidate: boolean

      should invalidate the control. Default value for this parameter is true.

    Returns void

focus

  • focus(): void

  • Sets the focus to this control.

    Returns void

getTemplate

  • getTemplate(): string

  • Gets the HTML template used to create instances of the control.

    This method traverses up the class hierarchy to find the nearest ancestor that specifies a control template. For example, if you specify a prototype for the ComboBox control, which does not specify a template, it will override the template defined by the DropDown base class (the nearest ancestor that does specify a template).

    Returns string

hasOwnProperty

  • hasOwnProperty(v: PropertyKey): boolean

  • Determines whether an object has a property with the specified name.

    Parameters

    • v: PropertyKey

      A property name.

    Returns boolean

hitTest

  • hitTest(pt: any, y?: number): number

  • Gets a number that corresponds to the value of the gauge at a given point.

    For example:

    // hit test a point when the user clicks on the gauge
gauge.hostElement.addEventListener('click', e => {
    var ht = gauge.hitTest(e.pageX, e.pageY);
    if (ht != null) {
        console.log('you clicked the gauge at value ' + ht.toString());
    }
});

    Parameters

    • pt: any

      The point to investigate, in window coordinates, or a MouseEvent object, or the x coordinate of the point.

    • Optional y: number

      The Y coordinate of the point (if the first parameter is a number).

    Returns number

    Value of the gauge at the point, or null if the point is not on the gauge's face.

initialize

  • initialize(options: any): void

  • Initializes the control by copying the properties from a given object.

    This method allows you to initialize controls using plain data objects instead of setting the value of each property in code.

    For example:

    grid.initialize({
  itemsSource: myList,
  autoGenerateColumns: false,
  columns: [
    { binding: 'id', header: 'Code', width: 130 },
    { binding: 'name', header: 'Name', width: 60 }
  ]
});

// is equivalent to
grid.itemsSource = myList;
grid.autoGenerateColumns = false;
// etc.

    The initialization data is type-checked as it is applied. If the initialization object contains unknown property names or invalid data types, this method will throw.

    Parameters

    • options: any

      Object that contains the initialization data.

    Returns void

invalidate

  • invalidate(fullUpdate?: boolean): void

  • Invalidates the control causing an asynchronous refresh.

    Parameters

    • Optional fullUpdate: boolean

      Whether to update the control layout as well as the content.

    Returns void

isPrototypeOf

  • isPrototypeOf(v: Object): boolean

  • Determines whether an object exists in another object's prototype chain.

    Parameters

    • v: Object

      Another object whose prototype chain is to be checked.

    Returns boolean

onGotFocus

onInvalidInput

onLostFocus

onRefreshed

onRefreshing

onValueChanged

propertyIsEnumerable

  • propertyIsEnumerable(v: PropertyKey): boolean

  • Determines whether a specified property is enumerable.

    Parameters

    • v: PropertyKey

      A property name.

    Returns boolean

refresh

  • refresh(fullUpdate?: boolean): void

  • Refreshes the control.

    Parameters

    • Optional fullUpdate: boolean

      Indicates whether to update the control layout as well as the content.

    Returns void

removeEventListener

  • removeEventListener(target?: EventTarget, type?: string, fn?: any, capture?: boolean): number

  • Removes one or more event listeners attached to elements owned by this Control.

    Parameters

    • Optional target: EventTarget

      Target element for the event. If null, removes listeners attached to all targets.

    • Optional type: string

      String that specifies the event. If null, removes listeners attached to all events.

    • Optional fn: any

      Handler to remove. If null, removes all handlers.

    • Optional capture: boolean

      Whether the listener is capturing. If null, removes capturing and non-capturing listeners.

    Returns number

    The number of listeners removed.

toLocaleString

  • toLocaleString(): string

  • Returns a date converted to a string using the current locale.

    Returns string

toString

  • toString(): string

  • Returns a string representation of an object.

    Returns string

valueOf

  • valueOf(): Object

  • Returns the primitive value of the specified object.

    Returns Object

Static createNeedleElement

  • createNeedleElement(points: any[], capRadius?: number, innerCapRadius?: number): SVGGElement

  • Creates an SVG element to be used as a gauge needle.

    Parameters

    • points: any[]

      Array of objects with "x" and "y" values that define the needle shape. The "x" values should range from 0 (gauge center) to 100 (gauge radius). The "y" values define the needle width, and typically range from 0 to 20. Each "y" value is used twice: from left to right to define the extent of the needle above the needle axis, and from right to left, with sign reversed, to define the extent of the needle below the axis.

    • Optional capRadius: number

      Optional value that defines the radius of the cap element, a circle centered at the origin.

    • Optional innerCapRadius: number

      Optional value that defines the radius of a circle painted above the cap element.

      The createNeedleElement method provides an easy and concise way to create custom needle shapes for use with the needleElement property.

      For example, the code below shows how the createNeedleElement method is used internally by the RadialGauge to build some of the common needle shapes defined by the NeedleShape enumeration:

      let needle = null;
switch (value) {
    case NeedleShape.Triangle:
        needle = RadialGauge.createNeedleElement([
            { x: -10, y: 10 }, { x: 100, y: 0 }
        ]);
        break;
    case NeedleShape.Diamond:
        needle = RadialGauge.createNeedleElement([
            { x: -20, y: 0 }, { x: 0, y: 10 }, { x: 100, y: 0 }
        ]);
        break;
    case NeedleShape.Drop:
        needle = RadialGauge.createNeedleElement([
            { x: 0, y: 20 }, { x: 100, y: 0 }
        ], 20, 10);
        break;
    case NeedleShape.Outer:
        needle = RadialGauge.createNeedleElement([
          { x: 60, y: 20 }, { x: 100, y: 0 }
        ]);
        break;
}

    Returns SVGGElement

Static disposeAll

  • disposeAll(e?: HTMLElement): void

  • Disposes of all Wijmo controls contained in an HTML element.

    Parameters

    • Optional e: HTMLElement

      Container element.

    Returns void

Static getControl

  • getControl(element: any): Control

  • Gets the control that is hosted in a given DOM element.

    Parameters

    • element: any

      The DOM element that hosts the control, or a CSS selector for the host element (e.g. '#theCtrl').

    Returns Control

Static invalidateAll

  • invalidateAll(e?: HTMLElement): void

  • Invalidates all Wijmo controls contained in an HTML element.

    Use this method when your application has dynamic panels that change the control's visibility or dimensions. For example, splitters, accordions, and tab controls usually change the visibility of its content elements. In this case, failing to notify the controls contained in the element may cause them to stop working properly.

    If this happens, you must handle the appropriate event in the dynamic container and call the Control.invalidateAll method so the contained Wijmo controls will update their layout information properly.

    Parameters

    • Optional e: HTMLElement

      Container element. If set to null, all Wijmo controls on the page will be invalidated.

    Returns void

Static refreshAll

  • refreshAll(e?: HTMLElement): void

  • Refreshes all Wijmo controls contained in an HTML element.

    This method is similar to invalidateAll, except the controls are updated immediately rather than after an interval.

    Parameters

    • Optional e: HTMLElement

      Container element. If set to null, all Wijmo controls on the page will be invalidated.

    Returns void

Events

gotFocus

gotFocus: Event<Control, EventArgs>

Occurs when the control gets the focus.

invalidInput

invalidInput: Event<Control, CancelEventArgs>

Occurs when invalid input is detected.

Invalid input may occur when the user types or pastes a value that cannot be converted to the proper type, or a value that is outside the valid range.

If the event handler cancels the event, the control will retain the invalid content and the focus, so users can correct the error.

If the event is not canceled, the control will ignore the invalid input and will retain the original content.

lostFocus

lostFocus: Event<Control, EventArgs>

Occurs when the control loses the focus.

refreshed

refreshed: Event<Control, EventArgs>

Occurs after the control has refreshed its contents.

refreshing

refreshing: Event<Control, EventArgs>

Occurs when the control is about to refresh its contents.

valueChanged

valueChanged: Event<Gauge, EventArgs>

Occurs when the value of the value property changes.