| // Copyright 2008, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include <atlbase.h> |
| |
| #include "base/base_drag_source.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // BaseDragSource, public: |
| |
| BaseDragSource::BaseDragSource() : ref_count_(0) { |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // BaseDragSource, IDropSource implementation: |
| |
| HRESULT BaseDragSource::QueryContinueDrag(BOOL escape_pressed, |
| DWORD key_state) { |
| if (escape_pressed) { |
| OnDragSourceCancel(); |
| return DRAGDROP_S_CANCEL; |
| } |
| |
| if (!(key_state & MK_LBUTTON)) { |
| OnDragSourceDrop(); |
| return DRAGDROP_S_DROP; |
| } |
| |
| OnDragSourceMove(); |
| return S_OK; |
| } |
| |
| HRESULT BaseDragSource::GiveFeedback(DWORD effect) { |
| return DRAGDROP_S_USEDEFAULTCURSORS; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // BaseDragSource, IUnknown implementation: |
| |
| HRESULT BaseDragSource::QueryInterface(const IID& iid, void** object) { |
| *object = NULL; |
| if (IsEqualIID(iid, IID_IUnknown) || IsEqualIID(iid, IID_IDropSource)) { |
| *object = this; |
| } else { |
| return E_NOINTERFACE; |
| } |
| AddRef(); |
| return S_OK; |
| } |
| |
| ULONG BaseDragSource::AddRef() { |
| return InterlockedIncrement(&ref_count_); |
| } |
| |
| ULONG BaseDragSource::Release() { |
| if (InterlockedDecrement(&ref_count_) == 0) { |
| ULONG copied_refcnt = ref_count_; |
| delete this; |
| return copied_refcnt; |
| } |
| return ref_count_; |
| } |