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Diffstat (limited to 'indra/llwindow/lldragdropwin32.cpp')
| -rw-r--r-- | indra/llwindow/lldragdropwin32.cpp | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/indra/llwindow/lldragdropwin32.cpp b/indra/llwindow/lldragdropwin32.cpp new file mode 100644 index 0000000000..9b80fe0a84 --- /dev/null +++ b/indra/llwindow/lldragdropwin32.cpp @@ -0,0 +1,370 @@ +/** + * @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 + |