Defines the labels, tick marks, and data position for items on the x-axis. Use either the LinearAxis class or the CategoryAxis class to set the properties of the angularAxis as a child tag in MXML or create a LinearAxis or CategoryAxis object in ActionScript.

The DataTransform object that the element is associated with. A DataTransform object represents an association between a set of elements and a set of axis objects used to transform those elements from data space to screen coordinates and back. A chart element uses its associated DataTransform object to calculate how to render its data.

If true, the computed range of the chart is affected by this canvas.

Defines the labels, tick marks, and data position for items on the y-axis. Use either the LinearAxis class or the CategoryAxis class to set the properties of the angular axis as a child tag in MXML or to create a LinearAxis or CategoryAxis object in ActionScript.

Constructor.

Adds a child DisplayObject after the end of this child list.

Calling childList.addChild(child) is the same as calling childList.addChild(child, childList.numChildren) After it has been added, its index of the new child will be (child.numChildren - 1)

Parameters

Adds a child DisplayObject instance to this DisplayObjectContainer instance. The child is added at the index position specified. An index of 0 represents the back (bottom) of the display list for this DisplayObjectContainer object.

If you add a child object that already has a different display object container as a parent, the object is removed from the child list of the other display object container.

Parameters

This adds any DisplayObject as child to current canvas

Parameters

Fills a drawing area with a bitmap image. Coordinate are in terms of the angularAxis or radialAxis properties of the canvas.

The usage and parameters of this method are identical to the beginBitmapFill() method of the flash.display.Graphics class.

Parameters

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Parameters

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Clears the canvas.

Draws a curve using the current line style from the current drawing position to (anchorX, anchorY) and using the control point that (controlX, controlY) specifies. The coordinates that you pass to this method are in terms of chart data rather than screen coordinates.

The usage and parameters of this method are identical to the curveTo() method of the flash.display.Graphics class.

Parameters

See also

Called by the governing DataTransform to obtain a description of the data represented by this IChartElement. Implementors fill out and return an Array of mx.charts.chartClasses.DataDescription objects to guarantee that their data is correctly accounted for by any axes that are autogenerating values from the displayed data (such as minimum, maximum, interval, and unitSize). Most element types return an Array containing a single DataDescription. Aggregate elements, such as BarSet and ColumnSet, might return multiple DataDescription instances that describe the data displayed by their subelements. When called, the implementor describes the data along the axis indicated by the dimension argument. This function might be called for each axis supported by the containing chart.

Parameters

Draws a circle. Set the line style, fill, or both before you call the drawCircle() method, by calling the linestyle(), lineGradientStyle(), beginFill(), beginGradientFill(), or beginBitmapFill() method. Coordinates are in terms of data rather than screen coordinates.

Parameters

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Draws an ellipse. Set the line style, fill, or both before you call the drawEllipse() method, by calling the linestyle(), lineGradientStyle(), beginFill(), beginGradientFill(), or beginBitmapFill() method. Coordinates are in terms of data rather than screen coordinates.

Parameters

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Draws a rectangle. Set the line style, fill, or both before you call the drawRect() method, by calling the linestyle(), lineGradientStyle(), beginFill(), beginGradientFill(), or beginBitmapFill() method. Coordinates are in terms of data rather than screen coordinates.

Parameters

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Draws a rounded rectangle. Set the line style, fill, or both before you call the drawRoundRect() method, by calling the linestyle(), lineGradientStyle(), beginFill(), beginGradientFill(), or beginBitmapFill() method. Coordinates are in terms of data rather than screen coordinates.

Parameters

See also

See also

Informs the canvas that the underlying data in the dataProvider has changed. This function triggers calls to the updateMapping() and updateTransform() methods on the next call to the commitProperties() method.

Parameters

Marks a component so that its updateDisplayList() method gets called during a later screen update.

Invalidation is a useful mechanism for eliminating duplicate work by delaying processing of changes to a component until a later screen update. For example, if you want to change the width and height, it would be wasteful to update the component immediately after you change the width and then update again with the new height. It is more efficient to change both properties and then render the component with its new size once.

Invalidation methods rarely get called. In general, setting a property on a component automatically calls the appropriate invalidation method.

Specifies a line style that Flash uses for subsequent calls to other Graphics methods (such as lineTo() or drawCircle()) for the object.

The usage and parameters of this method are identical to the lineStyle() method of the flash.display.Graphics class.

Parameters

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Draws a line using the current line style from the current drawing position to (angle, radial); the current drawing position is then set to (angle, radial). If the display object in which you are drawing contains content that was created with the Flash drawing tools, calls to the lineTo() method are drawn underneath the content. If you call lineTo() before any calls to the moveTo() method, the default position for the current drawing is (0, 0). If any of the parameters are missing, this method fails and the current drawing position is not changed. Coordinates are in terms of data rather than screen coordinates.

Parameters

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Called when the mapping of one or more associated axes changes. The DataTransform assigned to this ChartElement will call this method when any of the axes it represents is modified in some way.

Moves the current drawing position to (angle, radial). If any of the parameters are missing, this method fails and the current drawing position is not changed. Coordinates are in terms of data rather than screen coordinates.

Parameters

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Removes all data children (DisplayObject instances) of the canvas.

Removes the specified child DisplayObject from this child list.

Removing a child anywhere except from the end of a child list will decrement the indexes of children that were at higher indices.

The removed child will have its parent set to null and will be garbage collected if no other references to it exist.

Parameters

Removes the child DisplayObject at the specified index from this child list.

Removing a child anywhere except from the end of a child list will decrement the indexes of children that were at higher indices.

The removed child will have its parent set to null and will be garbage collected if no other references to it exist.

Parameters

Removes any item from the provided cache whose field property is NaN. Derived classes can call this method from their updateFilter() implementation to remove any ChartItem objects that were filtered out by the axes.

Parameters

Updates the position of any child to the current canvas.

Parameters

          var lbl:Label = new Label();
          lbl.text = "Last Month";
          canvas.addChild(lbl);
          canvas.updateDataChild(lbl,200,20);
     

Draws the object and/or sizes and positions its children. This is an advanced method that you might override when creating a subclass of UIComponent.

You do not call this method directly. Flex calls the updateDisplayList() method when the component is added to a container using the addChild() method, and when the component's invalidateDisplayList() method is called.

If the component has no children, this method is where you would do programmatic drawing using methods on the component's Graphics object such as graphics.drawRect().

If the component has children, this method is where you would call the move() and setActualSize() methods on its children.

Components can do programmatic drawing even if they have children. In doing either, use the component's unscaledWidth and unscaledHeight as its bounds.

It is important to use unscaledWidth and unscaledHeight instead of the width and height properties.

Parameters

Called when the underlying data the canvas represents needs to be filtered against the ranges represented by the axes of the associated data transform. This can happen either because the underlying data has changed or because the range of the associated axes has changed.

If you implement a custom canvas type, you should override this method and filter out any outlying data using the filterCache() method of the axes managed by its associated data transform. The filterCache() method converts any values that are out of range to NaN. You must be sure to call the super.updateFilter() method in your subclass.

You should not generally call this method directly. Instead, if you need to guarantee that your data has been filtered at a given point, call the validateTransform() method of the PolarDataCanvas class.

You can generally assume that your updateData() and updateMapping() methods have been called prior to this method, if necessary.

Calls the updateMapping() and updateFilter() methods of the canvas, if necessary. This method is called automatically by the canvas from the commitProperties() method, as necessary, but a derived canvas might call it explicitly if the generated values are needed at an explicit time.

Loading and mapping data against the axes is designed to be acceptable by the axes at any time. It is safe to call this method explicitly at any point.

Calls the updateTransform() method of the canvas, if necessary. This method is called automatically by the canvas during the commitProperties() method, as necessary, but a derived canvas might call it explicitly if the generated values are needed at an explicit time. Filtering and transforming of data relies on specific values being calculated by the axes, which can in turn depend on the data that is displayed in the chart. Calling this function at the wrong time might result in extra work being done, if those values are updated.