Spec-Zone .ru
спецификации, руководства, описания, API
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Now we will look at the methods used for importing data into a component. These methods are invoked for the drop gesture, or the paste action, when the component is the target of the operation. The TransferHandler
methods for importing data are:
canImport(TransferHandler.TransferSupport)
— This method is called repeatedly during a drag gesture and returns true if the area below the cursor can accept the transfer, or false if the transfer will be rejected. For example, if a user drags a color over a component that accepts only text, the canImport
method for that component's TransferHandler
should return false.
importData(TransferHandler.TransferSupport)
These methods replace older versions that do not use the TransferSupport
class, introduced in JDK 6. Unlike its replacement method, canImport(JComponent, DataFlavor[])
is not called continuously.
You will notice that these import methods take a TransferHandler.TransferSupport
argument. Next we look at the TransferSupport
class and then some sample import methods.