Chart Legend Component
Question
Defines a chart legend.
This component offers additional configuration options beyond the defaults used by the legend attribute of the <apex:chart> component.
Note: This component must be enclosed within an <apex:chart> component.
Answers
Explanations
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A. B. C. D.B.
The correct answer is B. apex:legend.
In Salesforce, a chart legend is a visual component that displays the meaning of the different colors, patterns, or symbols used to represent the data series in a chart. By default, the legend is displayed at the bottom of the chart, and its content is generated automatically based on the series labels and colors.
The apex:legend component is a custom component that allows developers to modify the default behavior and appearance of the chart legend. It can be used within an apex:chart component, which defines the data and layout of the chart, and provides access to various chart-related attributes.
Some of the additional configuration options that can be specified by the apex:legend component include:
- Position: The location of the legend relative to the chart, such as top, bottom, left, or right.
- Orientation: The direction in which the legend items are arranged, such as horizontal or vertical.
- Label formatting: The format and style of the legend labels, such as font size, color, and alignment.
- Item styling: The appearance and behavior of the individual legend items, such as shape, size, and clickability.
Here's an example of how the apex:legend component can be used to customize a chart legend:
php<apex:chart height="300" width="500" data="{!chartData}"> <apex:legend position="bottom" orientation="horizontal" fontSize="12"/> <apex:axis type="Numeric" position="left" fields="data1" grid="true" minimum="0"/> <apex:axis type="Category" position="bottom" fields="name" labelRotation="45"/> <apex:barSeries axis="left" xField="name" yField="data1"/> </apex:chart> In this example, the apex:legend component is used to set the position of the legend to the bottom and the orientation to horizontal, as well as the font size to 12. The apex:chart component contains other elements that define the data and layout of the chart, including an apex:axis component for the x and y axes, and an apex:barSeries component for the chart series.
The other answer options (A. apex:dataTable, C. apex:pageBlockSectionItem, and D. apex:inputSecret) are not related to chart legends and are not applicable in this context.
