ASP.NET MVC Controls | ComponentOne
In This Topic
    TreeMap Class
    In This Topic
    File
    wijmo.chart.hierarchical.js
    Module
    wijmo.chart.hierarchical
    Base Class
    FlexChartBase

    The TreeMap control displays hierarchical (tree-structured) data as a set of nested rectangles. Each branch of the tree is given a rectangle, which is then tiled with smaller rectangles representing sub-branches. A leaf node's rectangle has an area proportional to a specified dimension of the data. Often the leaf nodes are colored to show a separate dimension of the data.

    To use the TreeMap control, set the itemsSource property to an array containing the data and use the binding and bindingName properties to set the properties that contain the item values and names.

    Constructor

    Properties

    Methods

    Events

    Constructor

    constructor

    constructor(element: any, options?: any): TreeMap
    

    Initializes a new instance of the TreeMap class.

    Parameters
    • element: any

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

    • options: any
    Optional

    A Javascript object containing initialization data for the control.

    Returns
    TreeMap

    Properties

    binding

    Gets or sets the name of the property of the data item that contains the chart value.

    The binding property is used to calculate the size of the node as compared to other node values. The property should contain numeric data.

    Type
    string

    bindingName

    Gets or sets the name of the property containing name of the data item. The bindingName property is used to show name of the node. It should be an array or a string.

    Type
    any

    childItemsPath

    Gets or sets the name of the property (or properties) used to generate child items in hierarchical data.

    Set this property to a string to specify the name of the property that contains an item's child items (e.g. 'items').

    Set this property to an array containing the names of the properties that contain child items at each level, when the items are child items at different levels with different names (e.g. [ 'accounts', 'checks', 'earnings' ]).

    Type
    any

    collectionView

    Gets the ICollectionView object that contains the chart data.

    Inherited From
    FlexChartBase
    Type
    ICollectionView

    dataLabel

    Gets or sets the DataLabel of the treemap.

    Type
    DataLabel

    footerStyle

    Gets or sets the style of the chart footer.

    Inherited From
    FlexChartBase
    Type
    any

    headerStyle

    Gets or sets the style of the chart header.

    Inherited From
    FlexChartBase
    Type
    any

    hostElement

    Gets the DOM element that is hosting the control.

    Inherited From
    Control
    Type
    HTMLElement

    isDisabled

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

    Disabled controls cannot get mouse or keyboard events.

    Inherited From
    Control
    Type
    boolean

    isTouching

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

    Inherited From
    Control
    Type
    boolean

    isUpdating

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

    Inherited From
    Control
    Type
    boolean

    itemFormatter

    Gets or sets the item formatter function that allows you to customize the appearance of the chart elements.

    If specified, the function should take three parameters: the chart's IRenderEngine responsible for rendering elements on the chart, a HitTestInfo parameter that describes the element being rendered, and a function that provides the default rendering for the item.

    For example:

    itemFormatter: function (engine, hitTestInfo, defaultRenderer) {
      var ht = hitTestInfo,
          binding = 'downloads';
    
      // check that this is the right series/element
      if (ht.series.binding == binding && ht.pointIndex > 0 &&
          ht.chartElement == ChartElement.SeriesSymbol) {
    
        // get current and previous values
        var chart = ht.series.chart,
            items = chart.collectionView.items,
            valNow = items[ht.pointIndex][binding],
            valPrev = items[ht.pointIndex - 1][binding];
    
        // add line if value is increasing
        if (valNow > valPrev) {
          var pt1 = chart.dataToPoint(ht.pointIndex, valNow),
              pt2 = chart.dataToPoint(ht.pointIndex - 1, valPrev);
          engine.drawLine(pt1.x, pt1.y, pt2.x, pt2.y, null, {
            stroke: 'gold',
            strokeWidth: 6
          });
        }
      }
    
      // render element as usual
      defaultRenderer();
    }
    

    {@sample: Chart/LineArea/CustomLineSegments/purejs Example}

    Inherited From
    FlexChartBase
    Type
    Function

    itemsSource

    Gets or sets the array or ICollectionView object that contains the data used to create the chart.

    Inherited From
    FlexChartBase
    Type
    any

    legend

    Gets or sets the chart legend.

    Inherited From
    FlexChartBase
    Type
    Legend

    maxDepth

    Gets or sets the maximum number of node levels to show in the current view. These levels are flattened into the current plane. If a treemap has more levels than this value, user has to move up and down.

    Type
    number

    palette

    Gets or sets an array of default colors to be used in a treemap.

    The array contains strings that represent CSS colors. For example:

    // use colors specified by name
    chart.palette = ['red', 'green', 'blue'];
    
    // or use colors specified as rgba-values
    chart.palette = [
      'rgba(255,0,0,1)', 
      'rgba(255,0,0,0.8)', 
      'rgba(255,0,0,0.6)',
      'rgba(255,0,0,0.4)'];
    

    Or contains titleColor, maxColor, minColor separately. For example:

    chart.palette = [{
         titleColor: '#00277d',
         maxColor: 'rgba(0,39,125,0.7)',
         minColor: 'rgba(168,187,230,0.7)'
     }, {
         titleColor: '#7d1f00',
         maxColor: 'rgba(125,21,0,0.7)',
         minColor: 'rgba(230,183,168,0.7)'
     }, {
         titleColor: '#007d27',
         maxColor: 'rgba(0,125,39,0.7)',
         minColor: 'rgba(168,230,188,0.7)'
     }];
    
    Type
    string[]

    plotMargin

    Gets or sets the plot margin in pixels.

    The plot margin represents the area between the edges of the control and the plot area.

    By default, this value is calculated automatically based on the space required by the axis labels, but you can override it if you want to control the precise position of the plot area within the control (for example, when aligning multiple chart controls on a page).

    You may set this property to a numeric value or to a CSS-style margin specification. For example:

    // set the plot margin to 20 pixels on all sides
    chart.plotMargin = 20;
    
    // set the plot margin for top, right, bottom, left sides
    chart.plotMargin = '10 15 20 25';
    
    // set the plot margin for top/bottom (10px) and left/right (20px)
    chart.plotMargin = '10 20';
    
    Inherited From
    FlexChartBase
    Type
    any

    rightToLeft

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

    Inherited From
    Control
    Type
    boolean

    selectionMode

    The selectionMode doesn't work in TreeMap control.

    Type
    SelectionMode

    tabOrder

    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.

    Inherited From
    Control
    Type
    number

    tooltip

    Gets the chart's Tooltip.

    Type
    ChartTooltip

    type

    Gets or sets the TreeMapType of the treemap.

    Type
    TreeMapType

    Methods

    addEventListener

    addEventListener(target: EventTarget, type: string, fn: any, capture?: boolean, passive?: boolean): void
    

    Adds an event listener to an element owned by this Control.

    The control keeps a list of attached listeners and their handlers, making it easier to remove them when the control is disposed (see the dispose and removeEventListener methods).

    Failing to remove event listeners may cause memory leaks.

    The passive parameter is set to false by default, which means the event handler may call event.preventDefault(). If you are adding passive handlers to touch or wheel events, setting this parameter to true will improve application performance.

    For details on passive event listeners, please see Improving scrolling performance with passive listeners.

    Parameters
    • target: EventTarget

      Target element for the event.

    • type: string

      String that specifies the event.

    • fn: any

      Function to execute when the event occurs.

    • capture: boolean
    Optional

    Whether the listener should be handled by the control before it is handled by the target element.

    Indicates that the handler will never call preventDefault().

    Inherited From
    Control
    Returns
    void

    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');
    
    ```

    Parameters
    • classNames: string

      Names of classes to add to the control's host element.

    • template: string

      An HTML string that defines the control template.

    • parts: Object

      A dictionary of part variables and their names.

    • namePart: string Optional

      Name of the part to be named after the host element. This determines how the control submits data when used in forms.

    Inherited From
    Control
    Returns
    HTMLElement

    beginUpdate

    beginUpdate(): void
    

    Suspends notifications until the next call to endUpdate.

    Inherited From
    Control
    Returns
    void

    containsFocus

    containsFocus(): boolean
    

    Checks whether this control contains the focused element.

    Inherited From
    Control
    Returns
    boolean

    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
    Inherited From
    Control
    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.

    Inherited From
    Control
    Returns
    void

    Static disposeAll

    disposeAll(e?: HTMLElement): void
    

    Disposes of all Wijmo controls contained in an HTML element.

    Parameters
    Inherited From
    Control
    Returns
    void

    endUpdate

    endUpdate(): void
    

    Resumes notifications suspended by calls to beginUpdate.

    Inherited From
    Control
    Returns
    void

    focus

    focus(): void
    

    Sets the focus to this control.

    Inherited From
    Control
    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').

    Inherited From
    Control
    Returns
    Control

    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).

    Inherited From
    Control
    Returns
    string

    hitTest

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

    Gets a HitTestInfo object with information about the specified point.

    Parameters
    • pt: any

      The point to investigate, in window coordinates.

    • y: number Optional

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

    Returns
    HitTestInfo

    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.

    Inherited From
    Control
    Returns
    void

    invalidate

    invalidate(fullUpdate?: boolean): void
    

    Invalidates the control causing an asynchronous refresh.

    Parameters
    • fullUpdate: boolean Optional

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

    Inherited From
    Control
    Returns
    void

    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 invalidateAll method so the contained Wijmo controls will update their layout information properly.

    Parameters
    • e: HTMLElement Optional

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

    Inherited From
    Control
    Returns
    void

    onGotFocus

    onGotFocus(e?: EventArgs): void
    

    Raises the gotFocus event.

    Parameters
    Inherited From
    Control
    Returns
    void

    onInvalidInput

    onInvalidInput(e: CancelEventArgs): void
    

    Raises the invalidInput event.

    If the event handler cancels the event, the control will keep the invalid input and the focus.

    Parameters
    Inherited From
    Control
    Returns
    void

    onItemsSourceChanged

    onItemsSourceChanged(e: EventArgs): void
    

    Raises the itemsSourceChanged event.

    Parameters
    Inherited From
    FlexChartBase
    Returns
    void

    onItemsSourceChanging

    onItemsSourceChanging(e: CancelEventArgs): boolean
    

    Raises the itemsSourceChanging event.

    Parameters
    Inherited From
    FlexChartBase
    Returns
    boolean

    onLostFocus

    onLostFocus(e?: EventArgs): void
    

    Raises the lostFocus event.

    Parameters
    Inherited From
    Control
    Returns
    void

    onRefreshed

    onRefreshed(e?: EventArgs): void
    

    Raises the refreshed event.

    Parameters
    Inherited From
    Control
    Returns
    void

    onRefreshing

    onRefreshing(e?: EventArgs): void
    

    Raises the refreshing event.

    Parameters
    Inherited From
    Control
    Returns
    void

    onRendered

    onRendered(e: RenderEventArgs): void
    

    Raises the rendered event.

    Parameters
    Inherited From
    FlexChartBase
    Returns
    void

    onRendering

    onRendering(e: RenderEventArgs): void
    

    Raises the rendering event.

    Parameters
    Inherited From
    FlexChartBase
    Returns
    void

    onSelectionChanged

    onSelectionChanged(e?: EventArgs): void
    

    Raises the selectionChanged event.

    Parameters
    Inherited From
    FlexChartBase
    Returns
    void

    pageToControl

    pageToControl(pt: any, y?: number): Point
    

    Converts page coordinates to control coordinates.

    Parameters
    • pt: any

      The point of page coordinates or x value of page coordinates.

    • y: number Optional

      The y value of page coordinates. Its value should be a number, if pt is a number type. However, the y parameter is optional when pt is Point type.

    Inherited From
    FlexChartBase
    Returns
    Point

    refresh

    refresh(fullUpdate?: boolean): void
    

    Refreshes the chart.

    Parameters
    • fullUpdate: boolean Optional

      A value indicating whether to update the control layout as well as the content.

    Inherited From
    FlexChartBase
    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
    • e: HTMLElement Optional

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

    Inherited From
    Control
    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
    • target: EventTarget Optional

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

    • type: string Optional

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

    • fn: any Optional

      Handler to remove. If null, removes all handlers.

    • capture: boolean Optional

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

    Inherited From
    Control
    Returns
    number

    saveImageToDataUrl

    saveImageToDataUrl(format: ImageFormat, done: Function): void
    

    Saves the chart to an image data url.

    NOTE: This method does not work in IE browsers. If you require IE support, add the flex-chart.render module to the page.

    Parameters
    • format: ImageFormat

      The ImageFormat for the exported image.

    • done: Function

      A function to be called after data url is generated. The function gets passed the data url as its argument.

    Inherited From
    FlexChartBase
    Returns
    void

    saveImageToFile

    saveImageToFile(filename: string): void
    

    Saves the chart to an image file.

    NOTE: This method does not work in IE browsers. If you require IE support, add the *wijmo.chart.render* module to the page.

    Parameters
    • filename: string

      The filename for the exported image file including extension. Supported types are PNG, JPEG and SVG.

    Inherited From
    FlexChartBase
    Returns
    void

    saveSvgToDataUrl

    saveSvgToDataUrl(done: Function, embedCss?: boolean): void
    

    Saves the chart to a data url as SVG image.

    Parameters
    • done: Function

      A function to be called after data url is generated. The function gets passed the data url as its argument.

    • embedCss: boolean Optional

      Whether to include CSS styles to SVG image.

    Inherited From
    FlexChartBase
    Returns
    void

    saveSvgToFile

    saveSvgToFile(filename: string, embedCss?: boolean): void
    

    Saves the chart to an SVG image file.

    Parameters
    • filename: string

      The filename for the exported image file including extension.

    • embedCss: boolean Optional

      Whether to include CSS styles to SVG image.

    Inherited From
    FlexChartBase
    Returns
    void

    Events

    gotFocus

    Occurs when the control gets the focus.

    Inherited From
    Control
    Arguments
    EventArgs

    invalidInput

    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.

    Inherited From
    Control
    Arguments
    CancelEventArgs

    itemsSourceChanged

    Occurs after the chart has been bound to a new items source.

    Inherited From
    FlexChartBase
    Arguments
    EventArgs

    itemsSourceChanging

    Occurs before the chart is bound to a new items source.

    Inherited From
    FlexChartBase
    Arguments
    CancelEventArgs

    lostFocus

    Occurs when the control loses the focus.

    Inherited From
    Control
    Arguments
    EventArgs

    refreshed

    Occurs after the control has refreshed its contents.

    Inherited From
    Control
    Arguments
    EventArgs

    refreshing

    Occurs when the control is about to refresh its contents.

    Inherited From
    Control
    Arguments
    EventArgs

    rendered

    Occurs after the chart finishes rendering.

    Inherited From
    FlexChartBase
    Arguments
    RenderEventArgs

    rendering

    Occurs before the chart starts rendering data.

    Inherited From
    FlexChartBase
    Arguments
    RenderEventArgs

    selectionChanged

    Occurs after the selection changes, whether programmatically or when the user clicks the chart. This is useful, for example, when you want to update details in a textbox showing the current selection.

    Inherited From
    FlexChartBase
    Arguments
    EventArgs