104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
#ifndef _DEPVIEW_H
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#define _DEPVIEW_H
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#include <bfc/depend.h>
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#include <map>
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// this handles classes that use the getDependencyPtr() method instead of a
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// public cast
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template <class VT>
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class NOVTABLE DependentViewerTPtr : private DependentViewerI
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{
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protected:
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DependentViewerTPtr(VT *first = NULL)
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{
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_addViewItem(first);
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}
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void viewer_addViewItem(VT *item) { _addViewItem(item); }
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void viewer_delViewItem(VT *item) { _delViewItem(item); }
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using DependentViewerI::viewer_delAllItems;
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VT *viewer_enumViewItem(int which)
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{
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return lookup(DependentViewerI::viewer_enumViewItem(which));
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}
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using DependentViewerI::viewer_getNumItems;
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int viewer_haveItem(VT *item)
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{
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return DependentViewerI::viewer_haveItem(item->getDependencyPtr());
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}
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// item you were looking at is gone: WARNING: pointer no longer valid!
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virtual int viewer_onItemDeleted(VT *item) { return 1; }
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// item you are looking at issuing an event
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virtual int viewer_onEvent(VT *item, int event, intptr_t param2, void *ptr, size_t ptrlen) { return 1; }
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protected:
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virtual int viewer_onItemDeleted(ifc_dependent *item)
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{
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return viewer_onItemDeleted(lookup(item));
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}
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virtual int viewer_onEvent(ifc_dependent *item, const GUID *classguid, int event, intptr_t param, void *ptr, size_t ptrlen)
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{
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if (*classguid != *VT::depend_getClassGuid()) return 0; // filter namespace
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return viewer_onEvent(lookup(item), event, param, ptr, ptrlen);
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}
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private:
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VT *lookup(ifc_dependent *d)
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{
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if (d == NULL)
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return NULL;
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VT *vt = NULL;
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//int r = ptrmap.getItem(d, &vt);
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auto it = ptrmap.find(d);
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if (it != ptrmap.end())
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{
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vt = it->second;
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}
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//ASSERT(r);
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ASSERT(vt->getDependencyPtr() == d);
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return vt;
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}
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void _addViewItem(VT *item)
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{
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if (item == NULL)
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return ;
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ifc_dependent *d = item->getDependencyPtr();
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if (d == NULL)
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return ;
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ptrmap.insert({ d, item });
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DependentViewerI::viewer_addViewItem(d);
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}
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void _delViewItem(VT *item)
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{
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if (item == NULL) return ;
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ifc_dependent *dep = NULL;
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//ptrmap.reverseGetItem(item, &dep);
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//int r = ptrmap.reverseDelItem(item);
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for (auto &ptr : ptrmap)
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{
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if (ptr.second == item)
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{
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dep = ptr.first;
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ptrmap.erase(dep);
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break;
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}
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}
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//ASSERT(r);
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DependentViewerI::viewer_delViewItem(dep);
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}
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std::map<ifc_dependent *, VT *> ptrmap;
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};
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#endif
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