void CFolderHelper::DragOver(TObject *Sender, TObject *Source, int X, int Y, TDragState State, bool &Accept)
{
TElTree* tv = dynamic_cast<TElTree*>(Sender); VERIFY(Sender);
TElTreeItem* tgt;
for (ELVecIt it=drag_items.begin(); it!=drag_items.end(); it++){
TElTreeItem* src=*it;
TSTItemPart IP;
int HCol;
if (!src) Accept = false;
else{
tgt = tv->GetItemAt(X, Y, IP, HCol);
if (tgt){
if (IsFolder(src)){
bool b = true;
for (TElTreeItem* itm=tgt->Parent; itm; itm=itm->Parent) if (itm==src){b=false; break;}
if (IsFolder(tgt)){
Accept = b&&(tgt!=src)&&(src->Parent!=tgt);
}else if (IsObject(tgt)){
Accept = b&&(src!=tgt->Parent)&&(tgt!=src)&&(tgt->Parent!=src->Parent);
}
}else if (IsObject(src)){
if (IsFolder(tgt)){
Accept = (tgt!=src)&&(src->Parent!=tgt);
}else if (IsObject(tgt)){
Accept = (tgt!=src)&&(src->Parent!=tgt->Parent);
}
}
}else Accept = !!src->Parent;
}
if (false==Accept) return;
}
}
//---------------------------------------------------------------------------
// Drag'n'Drop
//---------------------------------------------------------------------------
void CFolderHelper::DragDrop(TObject *Sender, TObject* Source, int X, int Y, TOnItemRename after_drag)
{
R_ASSERT(after_drag);
TElTree* tv = dynamic_cast<TElTree*>(Sender); VERIFY(tv);
tv->IsUpdating = true;
TSTItemPart IP=(TSTItemPart)0;
int hc=0;
TElTreeItem* tgt_folder = tv->GetItemAt(X, Y, IP, hc);
if (tgt_folder&&(IsObject(tgt_folder))) tgt_folder=tgt_folder->Parent;
AnsiString base_name;
MakeName(tgt_folder,0,base_name,true);
AnsiString cur_fld_name=base_name;
TElTreeItem* cur_folder=tgt_folder;
//..FS.lock_rescan();
for (ELVecIt it=drag_items.begin(); it!=drag_items.end(); it++){
TElTreeItem* item = *it;
int drg_level = item->Level;
bool bFolderMove = IsFolder(item);
do{
// проверяем есть ли в таргете такой элемент
EItemType type = EItemType(item->Data);
TElTreeItem* pNode = FindItemInFolder(type,tv,cur_folder,item->Text);
if (pNode&&IsObject(item)){
Msg ("#!Item '%s' already exist in folder '%s'.",AnsiString(item->Text).c_str(),AnsiString(cur_folder->Text).c_str());
item = item->GetNext();
continue;
}
// если нет добавляем
if (!pNode){
pNode = (type==TYPE_FOLDER)?LL_CreateFolder(tv,cur_folder,item->Text,item->ForceButtons):LL_CreateObject(tv,cur_folder,item->Text);
if (type==TYPE_OBJECT) pNode->Assign(item);
}
if (IsFolder(item)){
cur_folder = pNode;
MakeName (cur_folder,0,cur_fld_name,true);
item = item->GetNext();
}else{
// rename
AnsiString old_name, new_name;
MakeName (item,0,old_name,false);
MakeName (pNode,0,new_name,false);
after_drag (old_name.c_str(),new_name.c_str(),TYPE_OBJECT);
TElTreeItem* parent = item->Parent;
// get next item && delete existence
TElTreeItem* next = item->GetNext();
item->Delete ();
if (parent&&((parent->GetLastChild()==item)||(0==parent->ChildrenCount))){
// if (0==parent->ChildrenCount) parent->Delete();
cur_folder = cur_folder?cur_folder->Parent:0;
}
item=next;
}
}while(item&&(item->Level>drg_level));
// delete folders
if (bFolderMove){
AnsiString old_name;
MakeName (*it,0,old_name,false);
after_drag (old_name.c_str(),0,TYPE_FOLDER);
(*it)->Delete ();
}
}
//..FS.unlock_rescan();
tv->IsUpdating = false;
}
