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

java.lang.Object
- org.pepstock.charba.client.events.HandlerManager
- - org.pepstock.charba.client.AbstractChart

All Implemented Interfaces:

HasAxes, IsChart

Direct Known Subclasses:

BarChart, BubbleChart, BubbleMapChart, ChoroplethChart, DoughnutChart, GaugeChart, LineChart, MatrixChart, MeterChart, PieChart, PolarAreaChart, RadarChart, SankeyChart, ScatterChart, StackedAreaChart, StackedBarChart, TimeSeriesBarChart, TimeSeriesLineChart, TreeMapChart
```
public abstract class AbstractChart
extends HandlerManager
implements IsChart, HasAxes
```
Base class of all charts.
It contains Chart.js initialization.

Author:

Andrea "Stock" Stocchero

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`AbstractChart(Type type)` Initializes simple panel and canvas which are used by CHART.JS. It sets also some default behaviors (width in percentage) for resizing

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`HandlerRegistration`	`addHandler(EventHandler handler, EventType type)` Adds a event handler.
`protected void`	`applyConfiguration()` Called before any drawing or reconfiguration in order that the chart which implements it can override options
`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.
`protected abstract boolean`	`checkDataset(Dataset dataset)` Returns `true` if the dataset can be managed by a this chart type.
`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.
`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. This will clean up any references stored to the chart object within Chart.js, along with any associated event listeners attached by Chart.js.
`void`	`draw()` Draws the chart. It can be invoked once during the life cycle of the chart.
`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 `IsChart.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 data sets that matches the event and returns the data set items references as a list.
`DatasetItem`	`getDatasetItem(int index)` Looks for the data set that matches the current index.
`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.
`String`	`getId()` Returns the ID of chart. It could be considered as chart unique ID.
`CursorType`	`getInitialCursor()` Returns the initial cursor of the chart.
`protected int`	`getMaximumAxesCount()` Returns the maximum amount of axes that the chart can manage.
`protected int`	`getMaximumDatasetsCount()` Returns the maximum amount of datasets that the chart can manage.
`ChartNode`	`getNode()` Returns the chart node with runtime data.
`Plugins`	`getPlugins()` Returns the plugins element to manage inline plugins.
`protected IsChart`	`getSource()` Returns a chart instance as source for all events.
`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 data sets which are visible
`IsDefaultScaledOptions`	`getWholeOptions()` Returns the default options by a chart instance, merging global, chart type global and chart options. If the options is not consistent, it will returns the `getDefaultChartOptions()`.
`void`	`hide(int datasetIndex)` Sets the visibility for the given data set to false. Updates the chart and animates the data set 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.
`boolean`	`isChartAttached()` Returns `true` whether this chart is currently attached to the browser's document.
`boolean`	`isDatasetVisible(int index)` Looks for the data set if it's visible or not, selected by index.
`boolean`	`isDataVisible(int index)` Returns the stored visibility state of an data index for all data sets.
`boolean`	`isDestroyOnDetach()` Returns `true` if the chart is configured to be destroyed on the detach from 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`	`isInitialized()` Returns `true` if CHART.JS chart has been initialized, otherwise `false`.
`void`	`onAttach(MutationItem item)` Invoked by mutation observer when a chart has been attached in the the DOM tree.
`void`	`onDetach(MutationItem item)` Invoked by mutation observer when a chart has been detached from the DOM tree.
`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 configuration)` 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. Use `.update()` in that case.
`void`	`reset()` Reset the chart to it's state before the initial animation. A new animation can then be triggered using update.
`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. 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`	`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 data set. 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 data set.
`void`	`setDestroyOnDetach(boolean destroyOnDetach)` Sets `true` if the chart is configured to be destroyed on the detach from 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. This will pause the chart during any current animation frame. Call `.render()` to re-animate.
`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 data sets. A data set 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 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`	`update(UpdateConfiguration configuration)` 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 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.

Methods inherited from class org.pepstock.charba.client.events.HandlerManager
fireEvent, getHandlerCount, isEventHandled

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.pepstock.charba.client.IsChart
checkAndGetIfConsistent, checkAndGetIfValid, checkIfConsistent, checkIfValid, fireEvent, getHandlerCount, getOptions, isAbstractChart, isConsistent, isEventHandled, isValid, toBase64Image, toBase64Image, toBase64Image

Methods inherited from interface org.pepstock.charba.client.HasAxes
checkAxis

- Constructor Detail
  - AbstractChart
```
protected AbstractChart(Type type)
```
    Initializes simple panel and canvas which are used by CHART.JS.
    It sets also some default behaviors (width in percentage) for resizing
    
    Parameters:
    
    type - the type of chart
- Method Detail
  - getSource
```
protected final IsChart getSource()
```
    Description copied from class: HandlerManager
    
    Returns a chart instance as source for all events.
    
    Specified by:
    
    getSource in class HandlerManager
    
    Returns:
    
    a chart instance as source for all events
  - addHandler
```
public final HandlerRegistration addHandler(EventHandler handler,
                                            EventType type)
```
    Description copied from class: HandlerManager
    
    Adds a event handler.
    
    Specified by:
    
    addHandler in interface IsChart
    
    Overrides:
    
    addHandler in class HandlerManager
    
    Parameters:
    
    handler - handler instance to add
    
    type - the event type associated with handler
    
    Returns:
    
    the handler registration in order to remove the handler later
  - getChartElement
```
public final Div getChartElement()
```
    Description copied from interface: IsChart
    
    Gets a handle to the object's underlying DOM element.
    
    Specified by:
    
    getChartElement in interface IsChart
    
    Returns:
    
    the object's browser element
  - getType
```
public final Type getType()
```
    Description copied from interface: IsChart
    
    Returns the type of chart.
    
    Specified by:
    
    getType in interface IsChart
    
    Returns:
    
    the type of chart.
  - getId
```
public final String getId()
```
    Returns the ID of chart.
    It could be considered as chart unique ID.
    
    Specified by:
    
    getId in interface IsChart
    
    Returns:
    
    the ID of chart
  - getBaseType
```
public final Type getBaseType()
```
    Description copied from interface: IsChart
    
    Returns the base type of chart that in case of ChartType is the same of IsChart.getType() otherwise, in case the type of the chart is a ControllerType is the chart type extension if there is or null.
    
    Specified by:
    
    getBaseType in interface IsChart
    
    Returns:
    
    the base type of chart.
  - getCanvas
```
public final Canvas getCanvas()
```
    Returns the canvas element used to draw the chart.
    
    Specified by:
    
    getCanvas in interface IsChart
    
    Returns:
    
    the canvas
  - removeCanvasPreventDefault
```
public final void removeCanvasPreventDefault()
```
    Remove the registration of prevent default mouse listener from canvas.
    This is necessary when you will add your mouse down listener.
    
    Specified by:
    
    removeCanvasPreventDefault in interface IsChart
  - isChartAttached
```
public final boolean isChartAttached()
```
    Returns true whether this chart is currently attached to the browser's document.
    
    Specified by:
    
    isChartAttached in interface IsChart
    
    Returns:
    
    true whether this chart is currently attached to the browser's document
  - getInitialCursor
```
public final CursorType getInitialCursor()
```
    Returns the initial cursor of the chart.
    
    Specified by:
    
    getInitialCursor in interface IsChart
    
    Returns:
    
    the initial cursor of the chart.
  - isInitialized
```
public final boolean isInitialized()
```
    Returns true if CHART.JS chart has been initialized, otherwise false.
    
    Specified by:
    
    isInitialized in interface IsChart
    
    Returns:
    
    true if CHART.JS chart has been initialized, otherwise false.
  - getNode
```
public final ChartNode getNode()
```
    Returns the chart node with runtime data.
    
    Specified by:
    
    getNode in interface IsChart
    
    Returns:
    
    the chart node.
  - getData
```
public final Data getData()
```
    Returns the data object with all passed datasets.
    
    Specified by:
    
    getData in interface IsChart
    
    Returns:
    
    the data configuration object
  - getPlugins
```
public final Plugins getPlugins()
```
    Returns the plugins element to manage inline plugins.
    
    Specified by:
    
    getPlugins in interface IsChart
    
    Returns:
    
    the plugins configuration object
  - getDefaultChartOptions
```
public final IsDefaultScaledOptions getDefaultChartOptions()
```
    Returns the default options created based on chart type.
    
    Specified by:
    
    getDefaultChartOptions in interface IsChart
    
    Returns:
    
    the default options of the chart
  - getWholeOptions
```
public final IsDefaultScaledOptions getWholeOptions()
```
    Returns the default options by a chart instance, merging global, chart type global and chart options.
    If the options is not consistent, it will returns the getDefaultChartOptions().
    
    Specified by:
    
    getWholeOptions in interface IsChart
    
    Returns:
    
    the default options by a chart instance, merging global, chart type global and chart options
  - getTimer
```
public final CTimer getTimer()
```
    Returns a CTimer instance inside chart.
    
    Specified by:
    
    getTimer in interface IsChart
    
    Returns:
    
    the timer instance of the chart
  - createAndSetTimer
```
public 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.
    
    Specified by:
    
    createAndSetTimer in interface IsChart
    
    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
```
public final boolean isDrawOnAttach()
```
    Returns true if the chart is configured to be drawn on the attach of DIV element, otherwise false.
    
    Specified by:
    
    isDrawOnAttach in interface IsChart
    
    Returns:
    
    the drawOnAttach true if the chart is configured to be drawn on the attach of DIV element, otherwise false.
  - setDrawOnAttach
```
public final void setDrawOnAttach(boolean drawOnAttach)
```
    Sets true if the chart is configured to be draw on the attach of DIV element, otherwise false.
    
    Specified by:
    
    setDrawOnAttach in interface IsChart
    
    Parameters:
    
    drawOnAttach - the drawOnAttach to set
  - isDestroyOnDetach
```
public final boolean isDestroyOnDetach()
```
    Returns true if the chart is configured to be destroyed on the detach from DIV element, otherwise false.
    
    Specified by:
    
    isDestroyOnDetach in interface IsChart
    
    Returns:
    
    the destroyOnDetach true if the chart is configured to be destroyed on the detach from DIV element, otherwise false.
  - setDestroyOnDetach
```
public final void setDestroyOnDetach(boolean destroyOnDetach)
```
    Sets true if the chart is configured to be destroyed on the detach from DIV element, otherwise false.
    
    Specified by:
    
    setDestroyOnDetach in interface IsChart
    
    Parameters:
    
    destroyOnDetach - the destroyOnDetach to set
  - onAttach
```
public final void onAttach(MutationItem item)
```
    Invoked by mutation observer when a chart has been attached in the the DOM tree.
    
    Parameters:
    
    item - can not be instantiated out of this package to avoid that anyone (apart the observer) will invoke the method.
  - onDetach
```
public final void onDetach(MutationItem item)
```
    Invoked by mutation observer when a chart has been detached from the DOM tree.
    
    Parameters:
    
    item - can not be instantiated out of this package to avoid that anyone (apart the observer) will invoke the method.
  - setActiveElements
```
public final void setActiveElements(List<ActiveDatasetElement> elements)
```
    Sets the active (hovered) elements for the chart.
    
    Specified by:
    
    setActiveElements in interface IsChart
    
    Parameters:
    
    elements - list of active elements
  - setActiveElements
```
public final void setActiveElements(ActiveDatasetElement... elements)
```
    Sets the active (hovered) elements for the chart.
    
    Specified by:
    
    setActiveElements in interface IsChart
    
    Parameters:
    
    elements - array of active elements
  - resetActiveElements
```
public final void resetActiveElements()
```
    Resets the active (hovered) elements for the chart.
    
    Specified by:
    
    resetActiveElements in interface IsChart
  - getActiveElements
```
public final List<ActiveDatasetElement> getActiveElements()
```
    Returns the active (hovered) elements for the chart.
    
    Specified by:
    
    getActiveElements in interface IsChart
    
    Returns:
    
    the array of active elements
  - setTooltipActiveElements
```
public final void setTooltipActiveElements(List<ActiveDatasetElement> elements)
```
    Sets the active tooltip elements for the chart.
    
    Specified by:
    
    setTooltipActiveElements in interface IsChart
    
    Parameters:
    
    elements - list of active tooltip elements
  - setTooltipActiveElements
```
public final void setTooltipActiveElements(ActiveDatasetElement... elements)
```
    Sets the active tooltip elements for the chart.
    
    Specified by:
    
    setTooltipActiveElements in interface IsChart
    
    Parameters:
    
    elements - array of active tooltip elements
  - resetTooltipActiveElements
```
public final void resetTooltipActiveElements()
```
    Resets the active tooltip elements for the chart.
    
    Specified by:
    
    resetTooltipActiveElements in interface IsChart
  - getTooltipActiveElements
```
public final List<ActiveDatasetElement> getTooltipActiveElements()
```
    Returns the active tooltip elements for the chart.
    
    Specified by:
    
    getTooltipActiveElements in interface IsChart
    
    Returns:
    
    the array of active tooltip elements
  - destroy
```
public final 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.
    
    Specified by:
    
    destroy in interface IsChart
  - stop
```
public final 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.
    
    Specified by:
    
    stop in interface IsChart
  - clear
```
public final void clear()
```
    Will clear the chart canvas.
    
    Specified by:
    
    clear in interface IsChart
  - reset
```
public final void reset()
```
    Reset the chart to it's state before the initial animation.
    A new animation can then be triggered using update.
    
    Specified by:
    
    reset in interface IsChart
  - toBase64Image
```
public final String toBase64Image(ImageMimeType type,
                                  double encoderOptions)
```
    Returns a base 64 encoded string of the chart in it's current state.
    
    Specified by:
    
    toBase64Image in interface IsChart
    
    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
```
public final 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.
    
    Specified by:
    
    resize in interface IsChart
  - resize
```
public final 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.
    
    Specified by:
    
    resize in interface IsChart
    
    Parameters:
    
    width - width size of resize
    
    height - height size of resize
  - update
```
public final 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.
    
    Specified by:
    
    update in interface IsChart
  - update
```
public final 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 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.
    
    Specified by:
    
    update in interface IsChart
    
    Parameters:
    
    mode - an animation mode can be provided to indicate what should be updated and what animation configuration should be used
  - update
```
public final void update(UpdateConfiguration configuration)
```
    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 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.
    
    Specified by:
    
    update in interface IsChart
    
    Parameters:
    
    configuration - a configuration object can be provided with additional configuration for the update process
  - reconfigure
```
public final 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.
    
    Specified by:
    
    reconfigure in interface IsChart
  - reconfigure
```
public final 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.
    
    Specified by:
    
    reconfigure in interface IsChart
    
    Parameters:
    
    mode - an animation mode can be provided to indicate what should be updated and what animation configuration should be used
  - reconfigure
```
public final void reconfigure(UpdateConfiguration configuration)
```
    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.
    
    Specified by:
    
    reconfigure in interface IsChart
    
    Parameters:
    
    configuration - a configuration object can be provided with additional configuration for the update process
  - render
```
public final void render()
```
    Triggers a redraw of all chart elements.
    Note, this does not update elements for new data.
    Use .update() in that case.
    
    Specified by:
    
    render in interface IsChart
  - getDatasetItem
```
public final DatasetItem getDatasetItem(int index)
```
    Looks for the data set that matches the current index.
    
    Specified by:
    
    getDatasetItem in interface IsChart
    
    Parameters:
    
    index - data set index
    
    Returns:
    
    data set item or null if the index is out of range of data sets count.
  - getDatasetAtEvent
```
public final List<DatasetReference> getDatasetAtEvent(BaseNativeEvent event)
```
    Looks for the data sets that matches the event and returns the data set items references as a list.
    
    Specified by:
    
    getDatasetAtEvent in interface IsChart
    
    Parameters:
    
    event - event of chart.
    
    Returns:
    
    data set items references list or or an empty list.
  - isDatasetVisible
```
public final boolean isDatasetVisible(int index)
```
    Looks for the data set if it's visible or not, selected by index.
    
    Specified by:
    
    isDatasetVisible in interface IsChart
    
    Parameters:
    
    index - data set index
    
    Returns:
    
    true if data set is visible otherwise false.
  - getVisibleDatasetCount
```
public final int getVisibleDatasetCount()
```
    Returns the amount of data sets which are visible
    
    Specified by:
    
    getVisibleDatasetCount in interface IsChart
    
    Returns:
    
    the amount of data sets which are visible.
    If chart is not initialized, return Undefined.INTEGER.
  - setDatasetVisibility
```
public final void setDatasetVisibility(int datasetIndex,
                                       boolean visibility)
```
    Sets the visibility for a given data set.
    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 data set.
    
    Specified by:
    
    setDatasetVisibility in interface IsChart
    
    Parameters:
    
    datasetIndex - data set index
    
    visibility - if true enables the visibility otherwise false
  - toggleDataVisibility
```
public final void toggleDataVisibility(int index)
```
    Toggles the visibility of an item in all data sets.
    A data set needs to explicitly support this feature for it to have an effect.
    From internal chart types, doughnut / pie and polar area use this.
    
    Specified by:
    
    toggleDataVisibility in interface IsChart
    
    Parameters:
    
    index - data index
  - isDataVisible
```
public final boolean isDataVisible(int index)
```
    Returns the stored visibility state of an data index for all data sets.
    
    Specified by:
    
    isDataVisible in interface IsChart
    
    Parameters:
    
    index - data index
    
    Returns:
    
    true if the data item is visible
  - hide
```
public final void hide(int datasetIndex)
```
    Sets the visibility for the given data set to false.
    Updates the chart and animates the data set with 'hide' mode.
    This animation can be configured under the hide key in animation options.
    
    Specified by:
    
    hide in interface IsChart
    
    Parameters:
    
    datasetIndex - data set index
  - hide
```
public final void hide(int datasetIndex,
                       int dataIndex)
```
    Sets the hidden flag of that element index to true and updates the chart.
    
    Specified by:
    
    hide in interface IsChart
    
    Parameters:
    
    datasetIndex - dataset index
    
    dataIndex - data index
  - show
```
public final 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.
    
    Specified by:
    
    show in interface IsChart
    
    Parameters:
    
    datasetIndex - dataset index
  - show
```
public final void show(int datasetIndex,
                       int dataIndex)
```
    Sets the hidden flag of that element index to false and updates the chart.
    
    Specified by:
    
    show in interface IsChart
    
    Parameters:
    
    datasetIndex - dataset index
    
    dataIndex - data index
  - getElementAtEvent
```
public final 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.
    
    Specified by:
    
    getElementAtEvent in interface IsChart
    
    Parameters:
    
    event - event of chart.
    
    Returns:
    
    single element at the event position or null if event is not consistent
  - getElementsAtEvent
```
public final 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.
    
    Specified by:
    
    getElementsAtEvent in interface IsChart
    
    Parameters:
    
    event - event of chart.
    
    Returns:
    
    all elements at the same data index or an empty list.
  - draw
```
public final void draw()
```
    Draws the chart.
    It can be invoked once during the life cycle of the chart.
    
    Specified by:
    
    draw in interface IsChart
  - applyConfiguration
```
protected void applyConfiguration()
```
    Called before any drawing or reconfiguration in order that the chart which implements it can override options
  - checkDatasets
```
public final void checkDatasets(Dataset... datasets)
```
    Description copied from interface: IsChart
    
    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.
    
    Specified by:
    
    checkDatasets in interface IsChart
    
    Parameters:
    
    datasets - list of datasets to check.
  - checkDataset
```
protected abstract boolean checkDataset(Dataset dataset)
```
    Returns true if the dataset can be managed by a this chart type.
    
    Parameters:
    
    dataset - dataset to check
    
    Returns:
    
    true if the dataset can be managed by a this chart type
  - getMaximumDatasetsCount
```
protected int getMaximumDatasetsCount()
```
    Returns the maximum amount of datasets that the chart can manage.
    
    Returns:
    
    the maximum amount of datasets that the chart can manage.
  - checkAxes
```
public void checkAxes(Axis... axes)
```
    Description copied from interface: IsChart
    
    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.
    
    Specified by:
    
    checkAxes in interface IsChart
    
    Parameters:
    
    axes - list of axes to check.
  - getMaximumAxesCount
```
protected int getMaximumAxesCount()
```
    Returns the maximum amount of axes that the chart can manage.
    
    Returns:
    
    the maximum amount of axes that the chart can manage.

Class AbstractChart

Constructor Summary

Method Summary

Methods inherited from class org.pepstock.charba.client.events.HandlerManager

Methods inherited from class java.lang.Object

Methods inherited from interface org.pepstock.charba.client.IsChart

Methods inherited from interface org.pepstock.charba.client.HasAxes

Constructor Detail

AbstractChart

Method Detail

getSource

addHandler

getChartElement

getType

getId

getBaseType

getCanvas

removeCanvasPreventDefault

isChartAttached

getInitialCursor

isInitialized

getNode

getData

getPlugins

getDefaultChartOptions

getWholeOptions

getTimer

createAndSetTimer

isDrawOnAttach

setDrawOnAttach

isDestroyOnDetach

setDestroyOnDetach

onAttach

onDetach

setActiveElements

setActiveElements

resetActiveElements

getActiveElements

setTooltipActiveElements

setTooltipActiveElements

resetTooltipActiveElements

getTooltipActiveElements

destroy

stop

clear

reset

toBase64Image

resize

resize

update

update

update

reconfigure

reconfigure

reconfigure

render

getDatasetItem

getDatasetAtEvent

isDatasetVisible

getVisibleDatasetCount

setDatasetVisibility

toggleDataVisibility

isDataVisible

hide

hide

show

show

getElementAtEvent

getElementsAtEvent

draw

applyConfiguration

checkDatasets

checkDataset

getMaximumDatasetsCount

checkAxes

getMaximumAxesCount