您可以創建自己的Transferable
實現,該實現將引用源組件。然後在TransferHandler.importData()
中,您可以將其與目標組件TransferSupport.getComponent()
進行比較。
例如,這裏是一個字符串的包裝,將被轉移:
public class DataWrapper {
String data;
Object source;
public DataWrapper(String data, Object source) {
super();
this.source = source;
this.data = data;
}
public String getData() {
return data;
}
public Object getSource() {
return source;
}
}
這是一個非常基本的Transferable
實施。
public class DataWrapperTransferable implements Transferable {
public static DataFlavor FLAVOR = new DataFlavor(DataWrapper.class,
"DataWrapper");
private DataFlavor flavors[];
private DataWrapper dataWrapper;
public DataWrapperTransferable(String data, Object source) {
dataWrapper = new DataWrapper(data, source);
flavors = new DataFlavor[] { FLAVOR };
}
@Override
public Object getTransferData(DataFlavor flavor)
throws UnsupportedFlavorException, IOException {
if (flavor.equals(FLAVOR)) {
return dataWrapper;
} else {
throw new UnsupportedFlavorException(flavor);
}
}
@Override
public DataFlavor[] getTransferDataFlavors() {
return flavors;
}
@Override
public boolean isDataFlavorSupported(DataFlavor flavor) {
return flavor.equals(FLAVOR) || flavor.equals(DataFlavor.stringFlavor);
}
}
然後,在TransferHandler
:
public boolean importData(TransferSupport support) {
DataWrapper dataWrapper = (DataWrapper) support
.getTransferable().getTransferData(
DataWrapperTransferable.FLAVOR);
if (dataWrapper.getSource() == support.getComponent()) {
//the originator and destination are the same
} else {
//drop from another component
}
//rest of the method
}
+1的想法..讓我試試這個.. :) – Amarnath