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/**
* @file lldragdrop32.cpp
* @brief Handler for Windows specific drag and drop (OS to client) code
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2009, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#if LL_WINDOWS
#if LL_OS_DRAGDROP_ENABLED
#include "linden_common.h"
#include "llwindowwin32.h"
#include "llkeyboardwin32.h"
#include "llwindowcallbacks.h"
#include "lldragdropwin32.h"
class LLDragDropWin32Target:
public IDropTarget
{
public:
////////////////////////////////////////////////////////////////////////////////
//
LLDragDropWin32Target( HWND hWnd ) :
mRefCount( 1 ),
mAppWindowHandle( hWnd ),
mAllowDrop( false)
{
};
virtual ~LLDragDropWin32Target()
{
};
////////////////////////////////////////////////////////////////////////////////
//
ULONG __stdcall AddRef( void )
{
return InterlockedIncrement( &mRefCount );
};
////////////////////////////////////////////////////////////////////////////////
//
ULONG __stdcall Release( void )
{
LONG count = InterlockedDecrement( &mRefCount );
if ( count == 0 )
{
delete this;
return 0;
}
else
{
return count;
};
};
////////////////////////////////////////////////////////////////////////////////
//
HRESULT __stdcall QueryInterface( REFIID iid, void** ppvObject )
{
if ( iid == IID_IUnknown || iid == IID_IDropTarget )
{
AddRef();
*ppvObject = this;
return S_OK;
}
else
{
*ppvObject = 0;
return E_NOINTERFACE;
};
};
////////////////////////////////////////////////////////////////////////////////
//
HRESULT __stdcall DragEnter( IDataObject* pDataObject, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect )
{
FORMATETC fmtetc = { CF_TEXT, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
// support CF_TEXT using a HGLOBAL?
if ( S_OK == pDataObject->QueryGetData( &fmtetc ) )
{
mAllowDrop = true;
mDropUrl = std::string();
mIsSlurl = false;
STGMEDIUM stgmed;
if( S_OK == pDataObject->GetData( &fmtetc, &stgmed ) )
{
PVOID data = GlobalLock( stgmed.hGlobal );
mDropUrl = std::string( (char*)data );
// XXX MAJOR MAJOR HACK!
LLWindowWin32 *window_imp = (LLWindowWin32 *)GetWindowLong(mAppWindowHandle, GWL_USERDATA);
if (NULL != window_imp)
{
LLCoordGL gl_coord( 0, 0 );
POINT pt2;
pt2.x = pt.x;
pt2.y = pt.y;
ScreenToClient( mAppWindowHandle, &pt2 );
LLCoordWindow cursor_coord_window( pt2.x, pt2.y );
window_imp->convertCoords(cursor_coord_window, &gl_coord);
MASK mask = gKeyboard->currentMask(TRUE);
LLWindowCallbacks::DragNDropResult result = window_imp->completeDragNDropRequest( gl_coord, mask,
LLWindowCallbacks::DNDA_START_TRACKING, mDropUrl );
switch (result)
{
case LLWindowCallbacks::DND_COPY:
*pdwEffect = DROPEFFECT_COPY;
break;
case LLWindowCallbacks::DND_LINK:
*pdwEffect = DROPEFFECT_LINK;
break;
case LLWindowCallbacks::DND_MOVE:
*pdwEffect = DROPEFFECT_MOVE;
break;
case LLWindowCallbacks::DND_NONE:
default:
*pdwEffect = DROPEFFECT_NONE;
break;
}
};
GlobalUnlock( stgmed.hGlobal );
ReleaseStgMedium( &stgmed );
};
SetFocus( mAppWindowHandle );
}
else
{
mAllowDrop = false;
*pdwEffect = DROPEFFECT_NONE;
};
return S_OK;
};
////////////////////////////////////////////////////////////////////////////////
//
HRESULT __stdcall DragOver( DWORD grfKeyState, POINTL pt, DWORD* pdwEffect )
{
if ( mAllowDrop )
{
// XXX MAJOR MAJOR HACK!
LLWindowWin32 *window_imp = (LLWindowWin32 *)GetWindowLong(mAppWindowHandle, GWL_USERDATA);
if (NULL != window_imp)
{
LLCoordGL gl_coord( 0, 0 );
POINT pt2;
pt2.x = pt.x;
pt2.y = pt.y;
ScreenToClient( mAppWindowHandle, &pt2 );
LLCoordWindow cursor_coord_window( pt2.x, pt2.y );
window_imp->convertCoords(cursor_coord_window, &gl_coord);
MASK mask = gKeyboard->currentMask(TRUE);
LLWindowCallbacks::DragNDropResult result = window_imp->completeDragNDropRequest( gl_coord, mask,
LLWindowCallbacks::DNDA_TRACK, mDropUrl );
switch (result)
{
case LLWindowCallbacks::DND_COPY:
*pdwEffect = DROPEFFECT_COPY;
break;
case LLWindowCallbacks::DND_LINK:
*pdwEffect = DROPEFFECT_LINK;
break;
case LLWindowCallbacks::DND_MOVE:
*pdwEffect = DROPEFFECT_MOVE;
break;
case LLWindowCallbacks::DND_NONE:
default:
*pdwEffect = DROPEFFECT_NONE;
break;
}
};
}
else
{
*pdwEffect = DROPEFFECT_NONE;
};
return S_OK;
};
////////////////////////////////////////////////////////////////////////////////
//
HRESULT __stdcall DragLeave( void )
{
// XXX MAJOR MAJOR HACK!
LLWindowWin32 *window_imp = (LLWindowWin32 *)GetWindowLong(mAppWindowHandle, GWL_USERDATA);
if (NULL != window_imp)
{
LLCoordGL gl_coord( 0, 0 );
MASK mask = gKeyboard->currentMask(TRUE);
window_imp->completeDragNDropRequest( gl_coord, mask, LLWindowCallbacks::DNDA_STOP_TRACKING, mDropUrl );
};
return S_OK;
};
////////////////////////////////////////////////////////////////////////////////
//
HRESULT __stdcall Drop( IDataObject* pDataObject, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect )
{
if ( mAllowDrop )
{
// window impl stored in Window data (neat!)
LLWindowWin32 *window_imp = (LLWindowWin32 *)GetWindowLong( mAppWindowHandle, GWL_USERDATA );
if ( NULL != window_imp )
{
LLCoordGL gl_coord( 0, 0 );
POINT pt_client;
pt_client.x = pt.x;
pt_client.y = pt.y;
ScreenToClient( mAppWindowHandle, &pt_client );
LLCoordWindow cursor_coord_window( pt_client.x, pt_client.y );
window_imp->convertCoords(cursor_coord_window, &gl_coord);
llinfos << "### (Drop) URL is: " << mDropUrl << llendl;
llinfos << "### raw coords are: " << pt.x << " x " << pt.y << llendl;
llinfos << "### client coords are: " << pt_client.x << " x " << pt_client.y << llendl;
llinfos << "### GL coords are: " << gl_coord.mX << " x " << gl_coord.mY << llendl;
llinfos << llendl;
// no keyboard modifier option yet but we could one day
MASK mask = gKeyboard->currentMask( TRUE );
// actually do the drop
LLWindowCallbacks::DragNDropResult result = window_imp->completeDragNDropRequest( gl_coord, mask,
LLWindowCallbacks::DNDA_DROPPED, mDropUrl );
switch (result)
{
case LLWindowCallbacks::DND_COPY:
*pdwEffect = DROPEFFECT_COPY;
break;
case LLWindowCallbacks::DND_LINK:
*pdwEffect = DROPEFFECT_LINK;
break;
case LLWindowCallbacks::DND_MOVE:
*pdwEffect = DROPEFFECT_MOVE;
break;
case LLWindowCallbacks::DND_NONE:
default:
*pdwEffect = DROPEFFECT_NONE;
break;
}
};
}
else
{
*pdwEffect = DROPEFFECT_NONE;
};
return S_OK;
};
////////////////////////////////////////////////////////////////////////////////
//
private:
LONG mRefCount;
HWND mAppWindowHandle;
bool mAllowDrop;
std::string mDropUrl;
bool mIsSlurl;
friend class LLWindowWin32;
};
////////////////////////////////////////////////////////////////////////////////
//
LLDragDropWin32::LLDragDropWin32() :
mDropTarget( NULL ),
mDropWindowHandle( NULL )
{
}
////////////////////////////////////////////////////////////////////////////////
//
LLDragDropWin32::~LLDragDropWin32()
{
}
////////////////////////////////////////////////////////////////////////////////
//
bool LLDragDropWin32::init( HWND hWnd )
{
if ( NOERROR != OleInitialize( NULL ) )
return FALSE;
mDropTarget = new LLDragDropWin32Target( hWnd );
if ( mDropTarget )
{
HRESULT result = CoLockObjectExternal( mDropTarget, TRUE, FALSE );
if ( S_OK == result )
{
result = RegisterDragDrop( hWnd, mDropTarget );
if ( S_OK != result )
{
// RegisterDragDrop failed
return false;
};
// all ok
mDropWindowHandle = hWnd;
}
else
{
// Unable to lock OLE object
return false;
};
};
// success
return true;
}
////////////////////////////////////////////////////////////////////////////////
//
void LLDragDropWin32::reset()
{
if ( mDropTarget )
{
RevokeDragDrop( mDropWindowHandle );
CoLockObjectExternal( mDropTarget, FALSE, TRUE );
mDropTarget->Release();
};
OleUninitialize();
}
#endif // LL_OS_DRAGDROP_ENABLED
#endif // LL_WINDOWS
|
