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1 | /////////////////////////////////////////////////////////////////////////////// | |
2 | // Name: msw/caret.cpp | |
3 | // Purpose: MSW implementation of wxCaret | |
4 | // Author: Vadim Zeitlin | |
5 | // Modified by: | |
6 | // Created: 23.05.99 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) wxWindows team | |
9 | // Licence: wxWindows licence | |
10 | /////////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | // =========================================================================== | |
13 | // declarations | |
14 | // =========================================================================== | |
15 | ||
16 | // --------------------------------------------------------------------------- | |
17 | // headers | |
18 | // --------------------------------------------------------------------------- | |
19 | ||
20 | #ifdef __GNUG__ | |
21 | #pragma implementation "caret.h" | |
22 | #endif | |
23 | ||
24 | // For compilers that support precompilation, includes "wx.h". | |
25 | #include "wx/wxprec.h" | |
26 | ||
27 | #ifdef __BORLANDC__ | |
28 | #pragma hdrstop | |
29 | #endif | |
30 | ||
31 | #ifndef WX_PRECOMP | |
32 | #include "wx/window.h" | |
33 | #include "wx/log.h" | |
34 | #endif // WX_PRECOMP | |
35 | ||
36 | #include "wx/caret.h" | |
37 | ||
38 | #include "wx/msw/private.h" | |
39 | ||
40 | // --------------------------------------------------------------------------- | |
41 | // macros | |
42 | // --------------------------------------------------------------------------- | |
43 | ||
44 | // under Win16 the caret APIs are void but under Win32 they may return an | |
45 | // error code which we want to check - this macro does just this | |
46 | #ifdef __WIN16__ | |
47 | #define CALL_CARET_API(api, args) api args | |
48 | #else // Win32 | |
49 | #define CALL_CARET_API(api, args) if ( !api args ) wxLogLastError(#api) | |
50 | #endif // Win16/32 | |
51 | ||
52 | // =========================================================================== | |
53 | // implementation | |
54 | // =========================================================================== | |
55 | ||
56 | // --------------------------------------------------------------------------- | |
57 | // blink time | |
58 | // --------------------------------------------------------------------------- | |
59 | ||
60 | //static | |
61 | int wxCaretBase::GetBlinkTime() | |
62 | { | |
63 | int blinkTime = ::GetCaretBlinkTime(); | |
64 | if ( !blinkTime ) | |
65 | { | |
66 | wxLogLastError("GetCaretBlinkTime"); | |
67 | } | |
68 | ||
69 | return blinkTime; | |
70 | } | |
71 | ||
72 | //static | |
73 | void wxCaretBase::SetBlinkTime(int milliseconds) | |
74 | { | |
75 | CALL_CARET_API(SetCaretBlinkTime, (milliseconds)); | |
76 | } | |
77 | ||
78 | // --------------------------------------------------------------------------- | |
79 | // creating/destroying the caret | |
80 | // --------------------------------------------------------------------------- | |
81 | ||
82 | bool wxCaret::MSWCreateCaret() | |
83 | { | |
84 | wxASSERT_MSG( GetWindow(), wxT("caret without window cannot be created") ); | |
85 | wxASSERT_MSG( IsOk(), wxT("caret of zero size cannot be created") ); | |
86 | ||
87 | if ( !m_hasCaret ) | |
88 | { | |
89 | CALL_CARET_API(CreateCaret, (GetWinHwnd(GetWindow()), 0, | |
90 | m_width, m_height)); | |
91 | ||
92 | m_hasCaret = TRUE; | |
93 | } | |
94 | ||
95 | return m_hasCaret; | |
96 | } | |
97 | ||
98 | void wxCaret::OnSetFocus() | |
99 | { | |
100 | if ( m_countVisible > 0 ) | |
101 | { | |
102 | if ( MSWCreateCaret() ) | |
103 | { | |
104 | // the caret was recreated but it doesn't remember its position and | |
105 | // it's not shown | |
106 | ||
107 | DoMove(); | |
108 | DoShow(); | |
109 | } | |
110 | } | |
111 | //else: caret is invisible, don't waste time creating it | |
112 | } | |
113 | ||
114 | void wxCaret::OnKillFocus() | |
115 | { | |
116 | if ( m_hasCaret ) | |
117 | { | |
118 | m_hasCaret = FALSE; | |
119 | ||
120 | CALL_CARET_API(DestroyCaret, ()); | |
121 | } | |
122 | } | |
123 | ||
124 | // --------------------------------------------------------------------------- | |
125 | // showing/hiding the caret | |
126 | // --------------------------------------------------------------------------- | |
127 | ||
128 | void wxCaret::DoShow() | |
129 | { | |
130 | wxASSERT_MSG( GetWindow(), wxT("caret without window cannot be shown") ); | |
131 | wxASSERT_MSG( IsOk(), wxT("caret of zero size cannot be shown") ); | |
132 | ||
133 | if ( m_hasCaret ) | |
134 | { | |
135 | CALL_CARET_API(ShowCaret, (GetWinHwnd(GetWindow()))); | |
136 | } | |
137 | //else: will be shown when we get the focus | |
138 | } | |
139 | ||
140 | void wxCaret::DoHide() | |
141 | { | |
142 | if ( m_hasCaret ) | |
143 | { | |
144 | CALL_CARET_API(HideCaret, (GetWinHwnd(GetWindow()))); | |
145 | } | |
146 | } | |
147 | ||
148 | // --------------------------------------------------------------------------- | |
149 | // moving the caret | |
150 | // --------------------------------------------------------------------------- | |
151 | ||
152 | void wxCaret::DoMove() | |
153 | { | |
154 | if ( m_hasCaret ) | |
155 | { | |
156 | wxASSERT_MSG( wxWindow::FindFocus() == GetWindow(), | |
157 | wxT("how did we lose focus?") ); | |
158 | ||
159 | CALL_CARET_API(SetCaretPos, (m_x, m_y)); | |
160 | } | |
161 | //else: we don't have caret right now, nothing to do (this does happen) | |
162 | } |