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lightning-sunbird  0.9+nobinonly
nsNativeDragSource.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
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00037 
00038 #include "nsNativeDragSource.h"
00039 #include <stdio.h>
00040 #include "nsISupportsImpl.h"
00041 
00042 
00043 /*
00044  * class nsNativeDragSource
00045  */
00046 nsNativeDragSource::nsNativeDragSource()
00047   : m_cRef(0)
00048 {
00049 }
00050 
00051 nsNativeDragSource::~nsNativeDragSource()
00052 {
00053 }
00054 
00055 STDMETHODIMP
00056 nsNativeDragSource::QueryInterface(REFIID riid, void** ppv)
00057 {
00058   *ppv=NULL;
00059 
00060   if (IID_IUnknown==riid || IID_IDropSource==riid)
00061     *ppv=this;
00062 
00063   if (NULL!=*ppv) {
00064     ((LPUNKNOWN)*ppv)->AddRef();
00065     return NOERROR;
00066   }
00067 
00068   return ResultFromScode(E_NOINTERFACE);
00069 }
00070 
00071 
00072 STDMETHODIMP_(ULONG)
00073 nsNativeDragSource::AddRef(void)
00074 {
00075   ++m_cRef;
00076   NS_LOG_ADDREF(this, m_cRef, "nsNativeDragSource", sizeof(*this));
00077   return m_cRef;
00078 }
00079 
00080 STDMETHODIMP_(ULONG)
00081 nsNativeDragSource::Release(void)
00082 {
00083   --m_cRef;
00084   NS_LOG_RELEASE(this, m_cRef, "nsNativeDragSource");
00085   if (0 != m_cRef)
00086     return m_cRef;
00087 
00088   delete this;
00089   return 0;
00090 }
00091 
00092 STDMETHODIMP
00093 nsNativeDragSource::QueryContinueDrag(BOOL fEsc, DWORD grfKeyState)
00094 {
00095 #ifdef DEBUG
00096   //printf("QueryContinueDrag: ");
00097 #endif
00098   if (fEsc) {
00099 #ifdef DEBUG
00100     //printf("fEsc\n");
00101 #endif
00102     return ResultFromScode(DRAGDROP_S_CANCEL);
00103   }
00104 
00105   if (!(grfKeyState & MK_LBUTTON) || (grfKeyState & MK_RBUTTON)) {
00106 #ifdef DEBUG
00107     //printf("grfKeyState & MK_LBUTTON\n");
00108 #endif
00109     return ResultFromScode(DRAGDROP_S_DROP);
00110   }
00111 
00112 #ifdef DEBUG
00113   //printf("NOERROR\n");
00114 #endif
00115        return NOERROR;
00116 }
00117 
00118 STDMETHODIMP
00119 nsNativeDragSource::GiveFeedback(DWORD dwEffect)
00120 {
00121 #ifdef DEBUG
00122   //printf("GiveFeedback\n");
00123 #endif
00124        return ResultFromScode(DRAGDROP_S_USEDEFAULTCURSORS);
00125 }