1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
// 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_;
}
|
