private int QueryGetData(long /*int*/ pFormatetc) {
if (transferAgents == null) return COM.E_FAIL;
TransferData transferData = new TransferData();
transferData.formatetc = new FORMATETC();
COM.MoveMemory(transferData.formatetc, pFormatetc, FORMATETC.sizeof);
transferData.type = transferData.formatetc.cfFormat;
// is this type supported by the transfer agent?
for (int i = 0; i < transferAgents.length; i++) {
Transfer transfer = transferAgents[i];
if (transfer != null && transfer.isSupportedType(transferData)) return COM.S_OK;
}
return COM.DV_E_FORMATETC;
}
private int GetData(long /*int*/ pFormatetc, long /*int*/ pmedium) {
/* Called by a data consumer to obtain data from a source data object.
The GetData method renders the data described in the specified FORMATETC
structure and transfers it through the specified STGMEDIUM structure.
The caller then assumes responsibility for releasing the STGMEDIUM structure.
*/
if (pFormatetc == 0 || pmedium == 0) return COM.E_INVALIDARG;
if (QueryGetData(pFormatetc) != COM.S_OK) return COM.DV_E_FORMATETC;
TransferData transferData = new TransferData();
transferData.formatetc = new FORMATETC();
COM.MoveMemory(transferData.formatetc, pFormatetc, FORMATETC.sizeof);
transferData.type = transferData.formatetc.cfFormat;
transferData.stgmedium = new STGMEDIUM();
transferData.result = COM.E_FAIL;
DNDEvent event = new DNDEvent();
event.widget = this;
event.time = OS.GetMessageTime();
event.dataType = transferData;
notifyListeners(DND.DragSetData, event);
if (!event.doit) return COM.E_FAIL;
// get matching transfer agent to perform conversion
Transfer transfer = null;
for (int i = 0; i < transferAgents.length; i++) {
Transfer transferAgent = transferAgents[i];
if (transferAgent != null && transferAgent.isSupportedType(transferData)) {
transfer = transferAgent;
break;
}
}
if (transfer == null) return COM.DV_E_FORMATETC;
transfer.javaToNative(event.data, transferData);
if (transferData.result != COM.S_OK) return transferData.result;
COM.MoveMemory(pmedium, transferData.stgmedium, STGMEDIUM.sizeof);
return transferData.result;
}