src/msw/caret.cpp

   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 // implementation
  42 // ===========================================================================
  43
  44 // ---------------------------------------------------------------------------
  45 // blink time
  46 // ---------------------------------------------------------------------------
  47
  48 //static
  49 int wxCaretBase::GetBlinkTime()
  50 {
  51     int blinkTime = ::GetCaretBlinkTime();
  52     if ( !blinkTime )
  53     {
  54         wxLogLastError("GetCaretBlinkTime");
  55     }
  56
  57     return blinkTime;
  58 }
  59
  60 //static
  61 void wxCaretBase::SetBlinkTime(int milliseconds)
  62 {
  63 #ifdef __WIN16__
  64     ::SetCaretBlinkTime(milliseconds) ;
  65 #else
  66     if ( !::SetCaretBlinkTime(milliseconds) )
  67     {
  68         wxLogLastError("SetCaretBlinkTime");
  69     }
  70 #endif
  71 }
  72
  73 // ---------------------------------------------------------------------------
  74 // creating/destroying the caret
  75 // ---------------------------------------------------------------------------
  76
  77 bool wxCaret::MSWCreateCaret()
  78 {
  79     wxASSERT_MSG( GetWindow(), _T("caret without window cannot be created") );
  80     wxASSERT_MSG( IsOk(),  _T("caret of zero size cannot be created") );
  81
  82     if ( !m_hasCaret )
  83     {
  84 #ifdef __WIN16__
  85         ::CreateCaret(GetWinHwnd(GetWindow()), 0, m_width, m_height) ;
  86         m_hasCaret = TRUE;
  87 #else
  88         if ( !::CreateCaret(GetWinHwnd(GetWindow()), 0, m_width, m_height) )
  89         {
  90             wxLogLastError("CreateCaret");
  91         }
  92         else
  93         {
  94             m_hasCaret = TRUE;
  95         }
  96 #endif
  97     }
  98
  99     return m_hasCaret;
 100 }
 101
 102 void wxCaret::OnSetFocus()
 103 {
 104     if ( m_countVisible > 0 )
 105     {
 106         if ( MSWCreateCaret() )
 107         {
 108             // the caret was recreated but it doesn't remember its position and
 109             // it's not shown
 110
 111             DoMove();
 112             DoShow();
 113         }
 114     }
 115     //else: caret is invisible, don't waste time creating it
 116 }
 117
 118 void wxCaret::OnKillFocus()
 119 {
 120     if ( m_hasCaret )
 121     {
 122         m_hasCaret = FALSE;
 123
 124 #ifdef __WIN16__
 125         ::DestroyCaret() ;
 126 #else
 127         if ( !::DestroyCaret() )
 128         {
 129             wxLogLastError("DestroyCaret");
 130         }
 131 #endif
 132     }
 133 }
 134
 135 // ---------------------------------------------------------------------------
 136 // showing/hiding the caret
 137 // ---------------------------------------------------------------------------
 138
 139 void wxCaret::DoShow()
 140 {
 141     wxASSERT_MSG( GetWindow(), _T("caret without window cannot be shown") );
 142     wxASSERT_MSG( IsOk(), _T("caret of zero size cannot be shown") );
 143
 144     if ( !m_hasCaret )
 145     {
 146         (void)MSWCreateCaret();
 147     }
 148
 149 #ifdef __WIN16__
 150     ::ShowCaret(GetWinHwnd(GetWindow())) ;
 151 #else
 152     if ( !::ShowCaret(GetWinHwnd(GetWindow())) )
 153     {
 154         wxLogLastError("ShowCaret");
 155     }
 156 #endif
 157 }
 158
 159 void wxCaret::DoHide()
 160 {
 161     if ( m_hasCaret )
 162     {
 163 #ifdef __WIN16__
 164         ::HideCaret(GetWinHwnd(GetWindow())) ;
 165 #else
 166         if ( !::HideCaret(GetWinHwnd(GetWindow())) )
 167         {
 168             wxLogLastError("HideCaret");
 169         }
 170 #endif
 171     }
 172 }
 173
 174 // ---------------------------------------------------------------------------
 175 // moving the caret
 176 // ---------------------------------------------------------------------------
 177
 178 void wxCaret::DoMove()
 179 {
 180     if ( m_hasCaret )
 181     {
 182 #ifdef __WIN16__
 183         ::SetCaretPos(m_x, m_y) ;
 184 #else
 185         if ( !::SetCaretPos(m_x, m_y) )
 186         {
 187             wxLogLastError("SetCaretPos");
 188         }
 189 #endif
 190     }
 191     //else: we don't have caret right now, nothing to do (this does happen)
 192 }