Details of the Live Sorting property

The GraphicRepeaterApp uses virtualization to reduce memory load and maintain acceptable performance during runtime. Virtualization minimizes memory usage by loading only those repeatable graphics that appear in the layout pane. Virtualization removes those repeatable graphics from memory that are not shown in the visible layout pane. Repeatable graphics are reconstructed again when the user scrolls the pane to show the graphics in the pane. Those graphics moved out of the pane view by scrolling are removed from memory.

The GraphicRepeaterApp disables virtualization when the Live Sorting property is active. Graphics that do not appear in the layout pane are still loaded in memory. As a result, performance can be affected if the GraphicRepeaterApp includes a large number of repeatable graphics.

Follow these recommendations for the number of repeatable graphics based upon whether sorting will be active or not during runtime.

• When Live Sorting is active, restrict the number of repeatable graphics to a maximum of 50.

• When Live Sorting is inactive, restrict the number of repeatable graphics to a maximum of 200.

Other factors affect the performance of the GraphicRepeaterApp during runtime. The maximum limits listed above are for a single instance of the GraphicRepeaterApp in a running ViewApp. If a ViewApp includes multiple instances of the GraphicRepeaterApp that run simultaneously, the number of repeatable graphics displayed by each instance is reduced to the maximum limit divided by the number of instances.