126 lines
2.9 KiB
C++
126 lines
2.9 KiB
C++
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//
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// Routines for implementing drop target capability to menubands.
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//
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#include "priv.h"
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#include "mbdrop.h"
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#include "iface.h" // for MBIF_
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#define SUPERCLASS
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//=================================================================
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// Implementation of CMenuBandDropTarget
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//=================================================================
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// Constructor
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CMenuBandDropTarget::CMenuBandDropTarget(HWND hwnd, int idTarget, DWORD dwFlags) :
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_cRef(1), _hwndParent(hwnd), _idTarget(idTarget), _dwFlagsMBIF(dwFlags)
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{
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}
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STDMETHODIMP_(ULONG) CMenuBandDropTarget::AddRef()
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{
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_cRef++;
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return _cRef;
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}
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STDMETHODIMP_(ULONG) CMenuBandDropTarget::Release()
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{
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ASSERT(_cRef > 0);
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_cRef--;
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if (_cRef > 0)
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return _cRef;
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delete this;
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return 0;
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}
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STDMETHODIMP CMenuBandDropTarget::QueryInterface(REFIID riid, void **ppvObj)
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{
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HRESULT hres;
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static const QITAB qit[] = {
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QITABENT(CMenuBandDropTarget, IDropTarget),
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{ 0 },
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};
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hres = QISearch(this, (LPCQITAB)qit, riid, ppvObj);
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return hres;
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}
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/*----------------------------------------------------------
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Purpose: IDropTarget::DragEnter method
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*/
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STDMETHODIMP CMenuBandDropTarget::DragEnter(IDataObject * pdtobj, DWORD grfKeyState,
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POINTL pt, DWORD * pdwEffect)
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{
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// If this item cascades out, then we want to pop the submenu open
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// after a timer. We don't allow a drop on the cascadable item
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// itself. (We could, but then we'd have to default to a location
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// inside the submenu, and I'm lazy right now.)
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if (*pdwEffect & (DROPEFFECT_MOVE | DROPEFFECT_COPY))
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{
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if (_dwFlagsMBIF & SMIF_SUBMENU)
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{
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// _idTimer = SetTimer(NULL, 0, 2000,
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}
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*pdwEffect &= (DROPEFFECT_MOVE | DROPEFFECT_COPY);
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}
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else
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*pdwEffect = DROPEFFECT_NONE;
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return S_OK;
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}
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/*----------------------------------------------------------
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Purpose: IDropTarget::DragOver method
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*/
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STDMETHODIMP CMenuBandDropTarget::DragOver(DWORD grfKeyState, POINTL pt, DWORD * pdwEffect)
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{
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*pdwEffect &= (DROPEFFECT_MOVE | DROPEFFECT_COPY);
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return S_OK;
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}
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/*----------------------------------------------------------
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Purpose: IDropTarget::DragLeave method
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*/
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STDMETHODIMP CMenuBandDropTarget::DragLeave(void)
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{
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// Kill timer, release object
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return S_OK;
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}
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/*----------------------------------------------------------
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Purpose: IDropTarget::Drop method
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*/
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STDMETHODIMP CMenuBandDropTarget::Drop(IDataObject * pdtobj, DWORD grfKeyState, POINTL pt,
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DWORD * pdwEffect)
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{
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if (*pdwEffect & (DROPEFFECT_MOVE | DROPEFFECT_COPY))
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{
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if (_dwFlagsMBIF & SMIF_SUBMENU)
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{
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// We don't allow drops on submenu items. Must go into
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// cascaded menu.
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*pdwEffect = DROPEFFECT_NONE;
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}
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}
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return S_OK;
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}
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