IsChart (Charba - J2CL and GWT charts library based on CHART.JS)

All Known Implementing Classes:

AbstractChart, AbstractChartWidget, BarChart, BarChartWidget, BubbleChart, BubbleChartWidget, BubbleMapChart, BubbleMapChartWidget, ChoroplethChart, ChoroplethChartWidget, DoughnutChart, DoughnutChartWidget, GaugeChart, GaugeChartWidget, HorizontalBarChart, HorizontalBarChartWidget, LineChart, LineChartWidget, MatrixChart, MatrixChartWidget, MeterChart, MeterChartWidget, PieChart, PieChartWidget, PolarAreaChart, PolarAreaChartWidget, RadarChart, RadarChartWidget, SankeyChart, SankeyChartWidget, ScatterChart, ScatterChartWidget, StackedAreaChart, StackedAreaChartWidget, StackedBarChart, StackedBarChartWidget, TimeSeriesBarChart, TimeSeriesBarChartWidget, TimeSeriesLineChart, TimeSeriesLineChartWidget, TreeMapChart, TreeMapChartWidget, VerticalLineChart, VerticalLineChartWidget
```
public interface IsChart
```
Interface which defines a chart.

Author:

Andrea "Stock" Stocchero

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`HandlerRegistration`	`addHandler(EventHandler handler, EventType type)` Adds this handler to the widget.
`static <T extends IsChart> T`	`checkAndGetIfConsistent(T chart)` Check if chart passed as argument is not `null` and its id is not `null` as well, and if mandatory methods of interface will return consistent instances. If not, throw a `IllegalArgumentException` or returns the chart instance.
`static IsChart`	`checkAndGetIfValid(IsChart chart)` Check if chart passed as argument is not `null` and its id is not `null` as well. If not, throw a `IllegalArgumentException` or returns the chart instance.
`void`	`checkAxes(Axis... axes)` Checks if axes, requested to be stored, are an acceptable type or amount. If a axis type or the amount of axes are not consistent for the chart, a `IllegalArgumentException` will be thrown.
`void`	`checkDatasets(Dataset... datasets)` Checks if datasets, requested to be stored, are an acceptable type or amount. If a dataset type or the amount of datasets are not consistent for the chart, a `IllegalArgumentException` will be thrown.
`static void`	`checkIfConsistent(IsChart chart)` Check if chart passed as argument is not `null` and its id is not `null` as well, and if mandatory methods of interface will return consistent instances. If not, throw a `IllegalArgumentException`.
`static void`	`checkIfValid(IsChart chart)` Checks if chart passed as argument is not `null` and its id is not `null` as well. If not, throw a `IllegalArgumentException`.
`void`	`clear()` Will clear the chart canvas.
`void`	`createAndSetTimer(ChartTimerTask task, int interval)` Creates a `CTimer` instance inside chart. It can be created only once during the life cycle of the chart.
`void`	`destroy()` Use this to destroy any chart instances that are created.
`void`	`draw()` Draws the chart
`void`	`fireEvent(Event event)` Fires the event to the handlers.
`List<ActiveDatasetElement>`	`getActiveElements()` Returns the active (hovered) elements for the chart.
`Type`	`getBaseType()` Returns the base type of chart that in case of `ChartType` is the same of `getType()` otherwise, in case the type of the chart is a `ControllerType` is the chart type extension if there is or `null`.
`Canvas`	`getCanvas()` Returns the canvas element used to draw the chart.
`Div`	`getChartElement()` Gets a handle to the object's underlying DOM element.
`Data`	`getData()` Returns the data object with all passed datasets.
`List<DatasetReference>`	`getDatasetAtEvent(BaseNativeEvent event)` Looks for the dataset that matches the event.
`DatasetItem`	`getDatasetItem(int index)` Looks for the dataset that matches the current index and returns.
`IsDefaultScaledOptions`	`getDefaultChartOptions()` Returns the default options created based on chart type.
`DatasetReference`	`getElementAtEvent(BaseNativeEvent event)` Calling on your chart instance passing an argument of an event, will return the single element at the event position. If there are multiple items within range, only the first is returned.
`List<DatasetReference>`	`getElementsAtEvent(BaseNativeEvent event)` Looks for the element under the event point, then returns all elements at the same data index. Calling it on your chart instance passing an argument of an event, will return the point elements that are at that the same position of that event.
`int`	`getHandlerCount(EventType type)` Returns the amount of handlers for a specific event type.
`String`	`getId()` Returns the ID of chart. It could be considered as chart unique ID.
`CursorType`	`getInitialCursor()` Returns the initial cursor of the chart.
`ChartNode`	`getNode()` Returns the chart node with runtime data.
`ConfigurationOptions`	`getOptions()` Returns the options of chart.
`Plugins`	`getPlugins()` Returns the plugins element to manage inline plugins.
`CTimer`	`getTimer()` Returns a `CTimer` instance inside chart.
`List<ActiveDatasetElement>`	`getTooltipActiveElements()` Returns the active tooltip elements for the chart.
`Type`	`getType()` Returns the type of chart.
`int`	`getVisibleDatasetCount()` Returns the amount of datasets which are visible
`IsDefaultScaledOptions`	`getWholeOptions()` Returns the default options by a chart instance, merging global, chart type global and chart options.
`void`	`hide(int datasetIndex)` Sets the visibility for the given dataset to false. Updates the chart and animates the dataset with 'hide' mode. This animation can be configured under the hide key in animation options.
`void`	`hide(int datasetIndex, int dataIndex)` Sets the hidden flag of that element index to `true` and updates the chart.
`static boolean`	`isAbstractChart(IsChart chart)` Returns `true` if chart passed as argument is an abstract chart instance.
`boolean`	`isChartAttached()` Returns `true` whether this chart is currently attached to the browser's document.
`static boolean`	`isConsistent(IsChart chart)` Returns `true` if chart passed as argument is not `null` and its id is not `null` as well, and if mandatory methods of interface will return consistent instances.
`boolean`	`isDatasetVisible(int index)` Looks for the dataset if it's visible or not, selected by index.
`boolean`	`isDataVisible(int index)` Returns the stored visibility state of an data index for all datasets.
`boolean`	`isDestroyOnDetach()` Returns `true` if the chart is configured to be destroyed on the attach of DIV element, otherwise `false`.
`boolean`	`isDrawOnAttach()` Returns `true` if the chart is configured to be drawn on the attach of DIV element, otherwise `false`.
`boolean`	`isEventHandled(EventType type)` Returns `true` if there is any event handler for event type passed as argument.
`boolean`	`isInitialized()` Returns `true` if CHART.JS chart has been initialized, otherwise `false`.
`static boolean`	`isValid(IsChart chart)` Returns `true` if chart passed as argument is not `null` and its id is not `null` as well.
`void`	`reconfigure()` Triggers an update of the chart. This can be safely called after updating the data object. This will update the options, mutating the options property in place.
`void`	`reconfigure(TransitionKey mode)` Triggers an update of the chart. This can be safely called after updating the data object. This will update the options, mutating the options property in place. A animation mode key can be provided for the update process using a specific animation configuration. This is useful when update is manually called inside an event handler and some different animation is desired.
`void`	`reconfigure(UpdateConfiguration config)` Triggers an update of the chart. This can be safely called after updating the data object. This will update the options, mutating the options property in place. A configuration object can be provided with additional configuration for the update process. This is useful when update is manually called inside an event handler and some different animation is desired.
`void`	`removeCanvasPreventDefault()` Remove the registration of prevent default mouse listener from canvas. This is necessary when you will add your mouse down listener.
`void`	`render()` Triggers a redraw of all chart elements. Note, this does not update elements for new data.
`void`	`reset()` Reset the chart to it's state before the initial animation.
`void`	`resetActiveElements()` Resets the active (hovered) elements for the chart.
`void`	`resetTooltipActiveElements()` Resets the active tooltip elements for the chart.
`void`	`resize()` Use this to manually resize the canvas element.
`void`	`resize(int width, int height)` Use this to manually resize the canvas element. This is run each time the canvas container is resized, but can be called this method manually if you change the size of the canvas nodes container element.
`void`	`setActiveElements(ActiveDatasetElement... elements)` Sets the active (hovered) elements for the chart.
`void`	`setActiveElements(List<ActiveDatasetElement> elements)` Sets the active (hovered) elements for the chart.
`void`	`setDatasetVisibility(int datasetIndex, boolean visibility)` Sets the visibility for a given dataset. This can be used to build a chart legend in HTML. During click on one of the HTML items, you can call it to change the appropriate dataset.
`void`	`setDestroyOnDetach(boolean destroyOnDetach)` Sets `true` if the chart is configured to be destroyed on the attach of DIV element, otherwise `false`.
`void`	`setDrawOnAttach(boolean drawOnAttach)` Sets `true` if the chart is configured to be draw on the attach of DIV element, otherwise `false`.
`void`	`setTooltipActiveElements(ActiveDatasetElement... elements)` Sets the active tooltip elements for the chart.
`void`	`setTooltipActiveElements(List<ActiveDatasetElement> elements)` Sets the active tooltip elements for the chart.
`void`	`show(int datasetIndex)` Sets the visibility for the given dataset to true. Updates the chart and animates the dataset with 'show' mode. This animation can be configured under the show key in animation options.
`void`	`show(int datasetIndex, int dataIndex)` Sets the hidden flag of that element index to `false` and updates the chart.
`void`	`stop()` Use this to stop any current animation loop.
`default String`	`toBase64Image()` Returns a data-URL containing a representation of the image in the PNG format and the image quality value is 0.92.
`default String`	`toBase64Image(double encoderOptions)` Returns a data-URL containing a representation of the image in the PNG format. The returned image is in a resolution of 96dpi.
`default String`	`toBase64Image(ImageMimeType type)` Returns a data-URL containing a representation of the image format, passed as argument. The returned image is in a resolution of 96dpi and the image quality value is 0.92.
`String`	`toBase64Image(ImageMimeType type, double encoderOptions)` Returns a base 64 encoded string of the chart in it's current state.
`void`	`toggleDataVisibility(int index)` Toggles the visibility of an item in all datasets. A dataset needs to explicitly support this feature for it to have an effect. From internal chart types, doughnut / pie and polar area use this.
`void`	`update()` Triggers an update of the chart. This can be safely called after updating the data object. This will update all scales, legends, and then re-render the chart.
`void`	`update(TransitionKey mode)` Triggers an update of the chart. This can be safely called after updating the data object. This will update all scales, legends, and then re-render the chart. A config object can be provided with additional configuration for the update process. This is useful when update is manually called inside an event handler and some different animation is desired.
`void`	`update(UpdateConfiguration config)` Triggers an update of the chart. This can be safely called after updating the data object. This will update all scales, legends, and then re-render the chart. A config object can be provided with additional configuration for the update process. This is useful when update is manually called inside an event handler and some different animation is desired.

- Method Detail
  - isConsistent
```
static boolean isConsistent(IsChart chart)
```
    Returns true if chart passed as argument is not null and its id is not null as well, and if mandatory methods of interface will return consistent instances.
    
    Parameters:
    
    chart - chart to be checked
    
    Returns:
    
    true if chart passed as argument is not null and its id is not null as well, and if mandatory methods of interface will return consistent instances.
  - checkIfConsistent
```
static void checkIfConsistent(IsChart chart)
```
    Check if chart passed as argument is not null and its id is not null as well, and if mandatory methods of interface will return consistent instances.
    If not, throw a IllegalArgumentException.
    
    Parameters:
    
    chart - chart to be checked
  - checkAndGetIfConsistent
```
static <T extends IsChart> T checkAndGetIfConsistent(T chart)
```
    Check if chart passed as argument is not null and its id is not null as well, and if mandatory methods of interface will return consistent instances.
    If not, throw a IllegalArgumentException or returns the chart instance.
    
    Type Parameters:
    
    T - type of the chart instance
    
    Parameters:
    
    chart - chart to be checked
    
    Returns:
    
    the chart instance passed as argument
  - isValid
```
static boolean isValid(IsChart chart)
```
    Returns true if chart passed as argument is not null and its id is not null as well.
    
    Parameters:
    
    chart - chart to be checked
    
    Returns:
    
    true if chart passed as argument is not null and its id is not null as well
  - checkIfValid
```
static void checkIfValid(IsChart chart)
```
    Checks if chart passed as argument is not null and its id is not null as well.
    If not, throw a IllegalArgumentException.
    
    Parameters:
    
    chart - chart to be checked
  - checkAndGetIfValid
```
static IsChart checkAndGetIfValid(IsChart chart)
```
    Check if chart passed as argument is not null and its id is not null as well.
    If not, throw a IllegalArgumentException or returns the chart instance.
    
    Parameters:
    
    chart - chart to be checked
    
    Returns:
    
    the chart instance passed as argument
  - isAbstractChart
```
static boolean isAbstractChart(IsChart chart)
```
    Returns true if chart passed as argument is an abstract chart instance.
    
    Parameters:
    
    chart - chart to be checked
    
    Returns:
    
    true if chart passed as argument is an abstract chart instance
  - addHandler
```
HandlerRegistration addHandler(EventHandler handler,
                               EventType type)
```
    Adds this handler to the widget.
    
    Parameters:
    
    type - the event type
    
    handler - the handler
    
    Returns:
    
    handler registration used to remove the handler
  - fireEvent
```
void fireEvent(Event event)
```
    Fires the event to the handlers.
    
    Parameters:
    
    event - the event to fire
  - getHandlerCount
```
int getHandlerCount(EventType type)
```
    Returns the amount of handlers for a specific event type.
    
    Parameters:
    
    type - event type to use to get the amount of handlers
    
    Returns:
    
    the amount of handlers for a specific event type
  - isEventHandled
```
boolean isEventHandled(EventType type)
```
    Returns true if there is any event handler for event type passed as argument.
    
    Parameters:
    
    type - event type to check
    
    Returns:
    
    true if there is any event handler for event type passed as argument
  - getChartElement
```
Div getChartElement()
```
    Gets a handle to the object's underlying DOM element.
    
    Returns:
    
    the object's browser element
  - isChartAttached
```
boolean isChartAttached()
```
    Returns true whether this chart is currently attached to the browser's document.
    
    Returns:
    
    true whether this chart is currently attached to the browser's document
  - getOptions
```
ConfigurationOptions getOptions()
```
    Returns the options of chart.
    
    Returns:
    
    the options of chart.
  - getType
```
Type getType()
```
    Returns the type of chart.
    
    Returns:
    
    the type of chart.
  - getBaseType
```
Type getBaseType()
```
    Returns the base type of chart that in case of ChartType is the same of getType() otherwise, in case the type of the chart is a ControllerType is the chart type extension if there is or null.
    
    Returns:
    
    the base type of chart.
  - getId
```
String getId()
```
    Returns the ID of chart.
    It could be considered as chart unique ID.
    
    Returns:
    
    the ID of chart
  - getCanvas
```
Canvas getCanvas()
```
    Returns the canvas element used to draw the chart.
    
    Returns:
    
    the canvas
  - removeCanvasPreventDefault
```
void removeCanvasPreventDefault()
```
    Remove the registration of prevent default mouse listener from canvas.
    This is necessary when you will add your mouse down listener.
  - getInitialCursor
```
CursorType getInitialCursor()
```
    Returns the initial cursor of the chart.
    
    Returns:
    
    the initial cursor of the chart.
  - isInitialized
```
boolean isInitialized()
```
    Returns true if CHART.JS chart has been initialized, otherwise false.
    
    Returns:
    
    true if CHART.JS chart has been initialized, otherwise false.
  - getNode
```
ChartNode getNode()
```
    Returns the chart node with runtime data.
    
    Returns:
    
    the chart node.
  - getData
```
Data getData()
```
    Returns the data object with all passed datasets.
    
    Returns:
    
    the data configuration object
  - getPlugins
```
Plugins getPlugins()
```
    Returns the plugins element to manage inline plugins.
    
    Returns:
    
    the plugins configuration object
  - getDefaultChartOptions
```
IsDefaultScaledOptions getDefaultChartOptions()
```
    Returns the default options created based on chart type.
    
    Returns:
    
    the default options of the chart
  - getWholeOptions
```
IsDefaultScaledOptions getWholeOptions()
```
    Returns the default options by a chart instance, merging global, chart type global and chart options.
    
    Returns:
    
    the default options by a chart instance, merging global, chart type global and chart options
  - getTimer
```
CTimer getTimer()
```
    Returns a CTimer instance inside chart.
    
    Returns:
    
    the timer instance of the chart
  - createAndSetTimer
```
void createAndSetTimer(ChartTimerTask task,
                       int interval)
```
    Creates a CTimer instance inside chart.
    It can be created only once during the life cycle of the chart.
    
    Parameters:
    
    task - the task to be executed repeatedly
    
    interval - the time, in milliseconds (thousands of a second), the timer should delay in between executions of the specified task.
    Must be greater than 0.
  - isDrawOnAttach
```
boolean isDrawOnAttach()
```
    Returns true if the chart is configured to be drawn on the attach of DIV element, otherwise false.
    
    Returns:
    
    the drawOnAttach true if the chart is configured to be drawn on the attach of DIV element, otherwise false.
  - setDrawOnAttach
```
void setDrawOnAttach(boolean drawOnAttach)
```
    Sets true if the chart is configured to be draw on the attach of DIV element, otherwise false.
    
    Parameters:
    
    drawOnAttach - the drawOnAttach to set
  - isDestroyOnDetach
```
boolean isDestroyOnDetach()
```
    Returns true if the chart is configured to be destroyed on the attach of DIV element, otherwise false.
    
    Returns:
    
    the destroyOnDetach true if the chart is configured to be destroyed on the attach of DIV element, otherwise false.
  - setDestroyOnDetach
```
void setDestroyOnDetach(boolean destroyOnDetach)
```
    Sets true if the chart is configured to be destroyed on the attach of DIV element, otherwise false.
    
    Parameters:
    
    destroyOnDetach - the destroyOnDetach to set
  - setActiveElements
```
void setActiveElements(List<ActiveDatasetElement> elements)
```
    Sets the active (hovered) elements for the chart.
    
    Parameters:
    
    elements - list of active elements
  - setActiveElements
```
void setActiveElements(ActiveDatasetElement... elements)
```
    Sets the active (hovered) elements for the chart.
    
    Parameters:
    
    elements - array of active elements
  - resetActiveElements
```
void resetActiveElements()
```
    Resets the active (hovered) elements for the chart.
  - getActiveElements
```
List<ActiveDatasetElement> getActiveElements()
```
    Returns the active (hovered) elements for the chart.
    
    Returns:
    
    the list of active elements
  - setTooltipActiveElements
```
void setTooltipActiveElements(List<ActiveDatasetElement> elements)
```
    Sets the active tooltip elements for the chart.
    
    Parameters:
    
    elements - list of active tooltip elements
  - resetTooltipActiveElements
```
void resetTooltipActiveElements()
```
    Resets the active tooltip elements for the chart.
  - setTooltipActiveElements
```
void setTooltipActiveElements(ActiveDatasetElement... elements)
```
    Sets the active tooltip elements for the chart.
    
    Parameters:
    
    elements - array of active tooltip elements
  - getTooltipActiveElements
```
List<ActiveDatasetElement> getTooltipActiveElements()
```
    Returns the active tooltip elements for the chart.
    
    Returns:
    
    the array of active tooltip elements
  - destroy
```
void destroy()
```
    Use this to destroy any chart instances that are created. This will clean up any references stored to the chart object within Chart.js, along with any associated event listeners attached by Chart.js.
  - stop
```
void stop()
```
    Use this to stop any current animation loop. This will pause the chart during any current animation frame. Call .render() to re-animate.
  - clear
```
void clear()
```
    Will clear the chart canvas. Used extensively internally between animation frames.
  - reset
```
void reset()
```
    Reset the chart to it's state before the initial animation. A new animation can then be triggered using update.
  - toBase64Image
```
default String toBase64Image()
```
    Returns a data-URL containing a representation of the image in the PNG format and the image quality value is 0.92.
    
    Returns:
    
    a data-URL containing a representation of the image in the PNG format
  - toBase64Image
```
default String toBase64Image(double encoderOptions)
```
    Returns a data-URL containing a representation of the image in the PNG format.
    The returned image is in a resolution of 96dpi.
    
    Parameters:
    
    encoderOptions - between 0 and 1 indicating the image quality to use for image formats that use lossy compression.
    If this argument is anything else, the default value for image quality is used. The default value is 0.92.
    
    Returns:
    
    a data-URL containing a representation of the image in the PNG format
  - toBase64Image
```
default String toBase64Image(ImageMimeType type)
```
    Returns a data-URL containing a representation of the image format, passed as argument.
    The returned image is in a resolution of 96dpi and the image quality value is 0.92.
    
    Parameters:
    
    type - indicating the image format
    
    Returns:
    
    a data-URL containing a representation of the image format, passed as argument
  - toBase64Image
```
String toBase64Image(ImageMimeType type,
                     double encoderOptions)
```
    Returns a base 64 encoded string of the chart in it's current state.
    
    Parameters:
    
    type - indicating the image format
    
    encoderOptions - between 0 and 1 indicating the image quality to use for image formats that use lossy compression.
    If this argument is anything else, the default value for image quality is used. The default value is 0.92.
    
    Returns:
    
    base 64 image or Undefined.STRING if chart is not initialized.
  - resize
```
void resize()
```
    Use this to manually resize the canvas element. This is run each time the canvas container is resized, but can be called this method manually if you change the size of the canvas nodes container element.
  - resize
```
void resize(int width,
            int height)
```
    Use this to manually resize the canvas element.
    This is run each time the canvas container is resized, but can be called this method manually if you change the size of the canvas nodes container element.
    
    Parameters:
    
    width - width size of resize
    
    height - height size of resize
  - update
```
void update()
```
    Triggers an update of the chart.
    This can be safely called after updating the data object.
    This will update all scales, legends, and then re-render the chart.
  - update
```
void update(TransitionKey mode)
```
    Triggers an update of the chart.
    This can be safely called after updating the data object.
    This will update all scales, legends, and then re-render the chart.
    A config object can be provided with additional configuration for the update process.
    This is useful when update is manually called inside an event handler and some different animation is desired.
    
    Parameters:
    
    mode - an animation mode can be provided to indicate what should be updated and what animation configuration should be used
  - update
```
void update(UpdateConfiguration config)
```
    Triggers an update of the chart.
    This can be safely called after updating the data object.
    This will update all scales, legends, and then re-render the chart.
    A config object can be provided with additional configuration for the update process.
    This is useful when update is manually called inside an event handler and some different animation is desired.
    
    Parameters:
    
    config - a config object can be provided with additional configuration for the update process
  - reconfigure
```
void reconfigure()
```
    Triggers an update of the chart.
    This can be safely called after updating the data object.
    This will update the options, mutating the options property in place.
  - reconfigure
```
void reconfigure(TransitionKey mode)
```
    Triggers an update of the chart.
    This can be safely called after updating the data object.
    This will update the options, mutating the options property in place.
    A animation mode key can be provided for the update process using a specific animation configuration.
    This is useful when update is manually called inside an event handler and some different animation is desired.
    
    Parameters:
    
    mode - an animation mode can be provided to indicate what should be updated and what animation configuration should be used
  - reconfigure
```
void reconfigure(UpdateConfiguration config)
```
    Triggers an update of the chart.
    This can be safely called after updating the data object.
    This will update the options, mutating the options property in place.
    A configuration object can be provided with additional configuration for the update process.
    This is useful when update is manually called inside an event handler and some different animation is desired.
    
    Parameters:
    
    config - a configuration object can be provided with additional configuration for the update process
  - render
```
void render()
```
    Triggers a redraw of all chart elements.
    Note, this does not update elements for new data. Use .update() in that case.
  - getDatasetItem
```
DatasetItem getDatasetItem(int index)
```
    Looks for the dataset that matches the current index and returns.
    
    Parameters:
    
    index - dataset index
    
    Returns:
    
    dataset item.
  - getDatasetAtEvent
```
List<DatasetReference> getDatasetAtEvent(BaseNativeEvent event)
```
    Looks for the dataset that matches the event.
    
    Parameters:
    
    event - event of chart.
    
    Returns:
    
    dataset item.
  - isDatasetVisible
```
boolean isDatasetVisible(int index)
```
    Looks for the dataset if it's visible or not, selected by index.
    
    Parameters:
    
    index - dataset index
    
    Returns:
    
    true if dataset is visible otherwise false.
  - getVisibleDatasetCount
```
int getVisibleDatasetCount()
```
    Returns the amount of datasets which are visible
    
    Returns:
    
    the amount of datasets which are visible. If chart is not initialized, return Undefined.INTEGER.
  - setDatasetVisibility
```
void setDatasetVisibility(int datasetIndex,
                          boolean visibility)
```
    Sets the visibility for a given dataset.
    This can be used to build a chart legend in HTML.
    During click on one of the HTML items, you can call it to change the appropriate dataset.
    
    Parameters:
    
    datasetIndex - dataset index
    
    visibility - if true enables the visibility otherwise false
  - toggleDataVisibility
```
void toggleDataVisibility(int index)
```
    Toggles the visibility of an item in all datasets.
    A dataset needs to explicitly support this feature for it to have an effect.
    From internal chart types, doughnut / pie and polar area use this.
    
    Parameters:
    
    index - data index
  - isDataVisible
```
boolean isDataVisible(int index)
```
    Returns the stored visibility state of an data index for all datasets.
    
    Parameters:
    
    index - data index
    
    Returns:
    
    true if the data item is visible
  - hide
```
void hide(int datasetIndex)
```
    Sets the visibility for the given dataset to false.
    Updates the chart and animates the dataset with 'hide' mode.
    This animation can be configured under the hide key in animation options.
    
    Parameters:
    
    datasetIndex - dataset index
  - hide
```
void hide(int datasetIndex,
          int dataIndex)
```
    Sets the hidden flag of that element index to true and updates the chart.
    
    Parameters:
    
    datasetIndex - dataset index
    
    dataIndex - data index
  - show
```
void show(int datasetIndex)
```
    Sets the visibility for the given dataset to true.
    Updates the chart and animates the dataset with 'show' mode.
    This animation can be configured under the show key in animation options.
    
    Parameters:
    
    datasetIndex - dataset index
  - show
```
void show(int datasetIndex,
          int dataIndex)
```
    Sets the hidden flag of that element index to false and updates the chart.
    
    Parameters:
    
    datasetIndex - dataset index
    
    dataIndex - data index
  - getElementAtEvent
```
DatasetReference getElementAtEvent(BaseNativeEvent event)
```
    Calling on your chart instance passing an argument of an event, will return the single element at the event position.
    If there are multiple items within range, only the first is returned.
    
    Parameters:
    
    event - event of chart.
    
    Returns:
    
    single element at the event position or null.
  - getElementsAtEvent
```
List<DatasetReference> getElementsAtEvent(BaseNativeEvent event)
```
    Looks for the element under the event point, then returns all elements at the same data index.
    Calling it on your chart instance passing an argument of an event, will return the point elements that are at that the same position of that event.
    
    Parameters:
    
    event - event of chart.
    
    Returns:
    
    all elements at the same data index or an empty list.
  - draw
```
void draw()
```
    Draws the chart
  - checkDatasets
```
void checkDatasets(Dataset... datasets)
```
    Checks if datasets, requested to be stored, are an acceptable type or amount.
    If a dataset type or the amount of datasets are not consistent for the chart, a IllegalArgumentException will be thrown.
    
    Parameters:
    
    datasets - list of datasets to check.
  - checkAxes
```
void checkAxes(Axis... axes)
```
    Checks if axes, requested to be stored, are an acceptable type or amount.
    If a axis type or the amount of axes are not consistent for the chart, a IllegalArgumentException will be thrown.
    
    Parameters:
    
    axes - list of axes to check.

Interface IsChart

Method Summary

Method Detail

isConsistent

checkIfConsistent

checkAndGetIfConsistent

isValid

checkIfValid

checkAndGetIfValid

isAbstractChart

addHandler

fireEvent

getHandlerCount

isEventHandled

getChartElement

isChartAttached

getOptions

getType

getBaseType

getId

getCanvas

removeCanvasPreventDefault

getInitialCursor

isInitialized

getNode

getData

getPlugins

getDefaultChartOptions

getWholeOptions

getTimer

createAndSetTimer

isDrawOnAttach

setDrawOnAttach

isDestroyOnDetach

setDestroyOnDetach

setActiveElements

setActiveElements

resetActiveElements

getActiveElements

setTooltipActiveElements

resetTooltipActiveElements

setTooltipActiveElements

getTooltipActiveElements

destroy

stop

clear

reset

toBase64Image

toBase64Image

toBase64Image

toBase64Image

resize

resize

update

update

update

reconfigure

reconfigure

reconfigure

render

getDatasetItem

getDatasetAtEvent

isDatasetVisible

getVisibleDatasetCount

setDatasetVisibility

toggleDataVisibility

isDataVisible

hide

hide

show

show

getElementAtEvent

getElementsAtEvent

draw

checkDatasets

checkAxes