widget/windows/nsNativeDragTarget.h@b8a032363ba2 (annotated)
widget/windows/nsNativeDragTarget.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | #ifndef _nsNativeDragTarget_h_ |
| michael@0 | 6 | #define _nsNativeDragTarget_h_ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "nsCOMPtr.h" |
| michael@0 | 9 | #include "nsIDragSession.h" |
| michael@0 | 10 | #include <ole2.h> |
| michael@0 | 11 | #include <shlobj.h> |
| michael@0 | 12 | |
| michael@0 | 13 | #ifndef IDropTargetHelper |
| michael@0 | 14 | #include <shobjidl.h> // Vista drag image interfaces |
| michael@0 | 15 | #undef LogSeverity // SetupAPI.h #defines this as DWORD |
| michael@0 | 16 | #endif |
| michael@0 | 17 | |
| michael@0 | 18 | #include "mozilla/Attributes.h" |
| michael@0 | 19 | |
| michael@0 | 20 | class nsIDragService; |
| michael@0 | 21 | class nsIWidget; |
| michael@0 | 22 | |
| michael@0 | 23 | struct IDataObject; |
| michael@0 | 24 | |
| michael@0 | 25 | /* |
| michael@0 | 26 | * nsNativeDragTarget implements the IDropTarget interface and gets most of its |
| michael@0 | 27 | * behavior from the associated adapter (m_dragDrop). |
| michael@0 | 28 | */ |
| michael@0 | 29 | |
| michael@0 | 30 | class nsNativeDragTarget MOZ_FINAL : public IDropTarget |
| michael@0 | 31 | { |
| michael@0 | 32 | public: |
| michael@0 | 33 | nsNativeDragTarget(nsIWidget * aWidget); |
| michael@0 | 34 | ~nsNativeDragTarget(); |
| michael@0 | 35 | |
| michael@0 | 36 | // IUnknown members - see iunknown.h for documentation |
| michael@0 | 37 | STDMETHODIMP QueryInterface(REFIID, void**); |
| michael@0 | 38 | STDMETHODIMP_(ULONG) AddRef(); |
| michael@0 | 39 | STDMETHODIMP_(ULONG) Release(); |
| michael@0 | 40 | |
| michael@0 | 41 | // IDataTarget members |
| michael@0 | 42 | |
| michael@0 | 43 | // Set pEffect based on whether this object can support a drop based on |
| michael@0 | 44 | // the data available from pSource, the key and mouse states specified |
| michael@0 | 45 | // in grfKeyState, and the coordinates specified by point. This is |
| michael@0 | 46 | // called by OLE when a drag enters this object's window (as registered |
| michael@0 | 47 | // by Initialize). |
| michael@0 | 48 | STDMETHODIMP DragEnter(LPDATAOBJECT pSource, DWORD grfKeyState, |
| michael@0 | 49 | POINTL point, DWORD* pEffect); |
| michael@0 | 50 | |
| michael@0 | 51 | // Similar to DragEnter except it is called frequently while the drag |
| michael@0 | 52 | // is over this object's window. |
| michael@0 | 53 | STDMETHODIMP DragOver(DWORD grfKeyState, POINTL point, DWORD* pEffect); |
| michael@0 | 54 | |
| michael@0 | 55 | // Release the drag-drop source and put internal state back to the point |
| michael@0 | 56 | // before the call to DragEnter. This is called when the drag leaves |
| michael@0 | 57 | // without a drop occurring. |
| michael@0 | 58 | STDMETHODIMP DragLeave(); |
| michael@0 | 59 | |
| michael@0 | 60 | // If point is within our region of interest and pSource's data supports |
| michael@0 | 61 | // one of our formats, get the data and set pEffect according to |
| michael@0 | 62 | // grfKeyState (DROPEFFECT_MOVE if the control key was not pressed, |
| michael@0 | 63 | // DROPEFFECT_COPY if the control key was pressed). Otherwise return |
| michael@0 | 64 | // E_FAIL. |
| michael@0 | 65 | STDMETHODIMP Drop(LPDATAOBJECT pSource, DWORD grfKeyState, |
| michael@0 | 66 | POINTL point, DWORD* pEffect); |
| michael@0 | 67 | /** |
| michael@0 | 68 | * Cancel the current drag session, if any. |
| michael@0 | 69 | */ |
| michael@0 | 70 | void DragCancel(); |
| michael@0 | 71 | |
| michael@0 | 72 | protected: |
| michael@0 | 73 | |
| michael@0 | 74 | void GetGeckoDragAction(DWORD grfKeyState, LPDWORD pdwEffect, |
| michael@0 | 75 | uint32_t * aGeckoAction); |
| michael@0 | 76 | void ProcessDrag(uint32_t aEventType, DWORD grfKeyState, |
| michael@0 | 77 | POINTL pt, DWORD* pdwEffect); |
| michael@0 | 78 | void DispatchDragDropEvent(uint32_t aType, POINTL pt); |
| michael@0 | 79 | void AddLinkSupportIfCanBeGenerated(LPDATAOBJECT aIDataSource); |
| michael@0 | 80 | |
| michael@0 | 81 | // Native Stuff |
| michael@0 | 82 | ULONG m_cRef; // reference count |
| michael@0 | 83 | HWND mHWnd; |
| michael@0 | 84 | DWORD mEffectsAllowed; |
| michael@0 | 85 | DWORD mEffectsPreferred; |
| michael@0 | 86 | bool mTookOwnRef; |
| michael@0 | 87 | |
| michael@0 | 88 | // Gecko Stuff |
| michael@0 | 89 | nsIWidget * mWidget; |
| michael@0 | 90 | nsIDragService * mDragService; |
| michael@0 | 91 | // Drag target helper |
| michael@0 | 92 | IDropTargetHelper * GetDropTargetHelper(); |
| michael@0 | 93 | |
| michael@0 | 94 | |
| michael@0 | 95 | private: |
| michael@0 | 96 | // Drag target helper |
| michael@0 | 97 | IDropTargetHelper * mDropTargetHelper; |
| michael@0 | 98 | }; |
| michael@0 | 99 | |
| michael@0 | 100 | #endif // _nsNativeDragTarget_h_ |
| michael@0 | 101 | |
| michael@0 | 102 |
