widget/src/windows/nsNativeDragSource.cpp

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  37
  38 #include "nsNativeDragSource.h"
  39 #include <stdio.h>
  40 #include "nsISupportsImpl.h"
  41
  42
  43 /*
  44  * class nsNativeDragSource
  45  */
  46 nsNativeDragSource::nsNativeDragSource()
  47   : m_cRef(0)
  48 {
  49 }
  50
  51 nsNativeDragSource::~nsNativeDragSource()
  52 {
  53 }
  54
  55 STDMETHODIMP
  56 nsNativeDragSource::QueryInterface(REFIID riid, void** ppv)
  57 {
  58   *ppv=NULL;
  59
  60   if (IID_IUnknown==riid || IID_IDropSource==riid)
  61     *ppv=this;
  62
  63   if (NULL!=*ppv) {
  64     ((LPUNKNOWN)*ppv)->AddRef();
  65     return NOERROR;
  66   }
  67
  68   return ResultFromScode(E_NOINTERFACE);
  69 }
  70
  71
  72 STDMETHODIMP_(ULONG)
  73 nsNativeDragSource::AddRef(void)
  74 {
  75   ++m_cRef;
  76   NS_LOG_ADDREF(this, m_cRef, "nsNativeDragSource", sizeof(*this));
  77   return m_cRef;
  78 }
  79
  80 STDMETHODIMP_(ULONG)
  81 nsNativeDragSource::Release(void)
  82 {
  83   --m_cRef;
  84   NS_LOG_RELEASE(this, m_cRef, "nsNativeDragSource");
  85   if (0 != m_cRef)
  86     return m_cRef;
  87
  88   delete this;
  89   return 0;
  90 }
  91
  92 STDMETHODIMP
  93 nsNativeDragSource::QueryContinueDrag(BOOL fEsc, DWORD grfKeyState)
  94 {
  95 #ifdef DEBUG
  96   //printf("QueryContinueDrag: ");
  97 #endif
  98   if (fEsc) {
  99 #ifdef DEBUG
 100     //printf("fEsc\n");
 101 #endif
 102     return ResultFromScode(DRAGDROP_S_CANCEL);
 103   }
 104
 105   if (!(grfKeyState & MK_LBUTTON) || (grfKeyState & MK_RBUTTON)) {
 106 #ifdef DEBUG
 107     //printf("grfKeyState & MK_LBUTTON\n");
 108 #endif
 109     return ResultFromScode(DRAGDROP_S_DROP);
 110   }
 111
 112 #ifdef DEBUG
 113   //printf("NOERROR\n");
 114 #endif
 115         return NOERROR;
 116 }
 117
 118 STDMETHODIMP
 119 nsNativeDragSource::GiveFeedback(DWORD dwEffect)
 120 {
 121 #ifdef DEBUG
 122   //printf("GiveFeedback\n");
 123 #endif
 124         return ResultFromScode(DRAGDROP_S_USEDEFAULTCURSORS);
 125 }