src/generic/caret.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        generic/caret.h
   3 // Purpose:     generic wxCaret class
   4 // Author:      Vadim Zeitlin (original code by Robert Roebling)
   5 // Modified by:
   6 // Created:     25.05.99
   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 #if 0 //def __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/wx.h"
  33 #endif //WX_PRECOMP
  34
  35 #include "wx/caret.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // global variables for this module
  39 // ----------------------------------------------------------------------------
  40
  41 // the blink time (common to all carets for MSW compatibility)
  42 static int gs_blinkTime = 500;  // in milliseconds
  43
  44 // ============================================================================
  45 // implementation
  46 // ============================================================================
  47
  48 // ----------------------------------------------------------------------------
  49 // wxCaret static functions and data
  50 // ----------------------------------------------------------------------------
  51
  52
  53 int wxCaretBase::GetBlinkTime()
  54 {
  55     return gs_blinkTime;
  56 }
  57
  58 void wxCaretBase::SetBlinkTime(int milliseconds)
  59 {
  60     gs_blinkTime = milliseconds;
  61 }
  62
  63 // ----------------------------------------------------------------------------
  64 // initialization and destruction
  65 // ----------------------------------------------------------------------------
  66
  67 void wxCaret::InitGeneric()
  68 {
  69 }
  70
  71 wxCaret::~wxCaret()
  72 {
  73     if ( IsVisible() )
  74     {
  75         // stop blinking
  76         m_timer.Stop();
  77     }
  78 }
  79
  80 // ----------------------------------------------------------------------------
  81 // showing/hiding/moving the caret (base class interface)
  82 // ----------------------------------------------------------------------------
  83
  84 void wxCaret::DoShow()
  85 {
  86     m_timer.Start(GetBlinkTime());
  87
  88     m_blinkedOut = TRUE;
  89     Blink();
  90 }
  91
  92 void wxCaret::DoHide()
  93 {
  94     m_timer.Stop();
  95
  96     if ( !m_blinkedOut )
  97     {
  98         Blink();
  99     }
 100 }
 101
 102 void wxCaret::DoMove()
 103 {
 104     if ( IsVisible() && !m_blinkedOut )
 105     {
 106         Blink();
 107     }
 108     //else: will be shown at the correct location next time it blinks
 109 }
 110
 111 // ----------------------------------------------------------------------------
 112 // drawing the caret
 113 // ----------------------------------------------------------------------------
 114
 115 void wxCaret::Blink()
 116 {
 117     m_blinkedOut = !m_blinkedOut;
 118
 119     wxClientDC dc(GetWindow());
 120     if ( !m_blinkedOut )
 121     {
 122         DoDraw(&dc);
 123     }
 124     else
 125     {
 126         // FIXME can't be less efficient than this... (+1 needed!)
 127         wxRect rect(m_x, m_y, m_width + 1, m_height + 1);
 128         GetWindow()->Refresh(FALSE, &rect);
 129     }
 130 }
 131
 132 void wxCaret::DoDraw(wxDC *dc)
 133 {
 134     dc->SetPen( *wxBLACK_PEN );
 135     dc->DrawLine( m_x, m_y, m_x+m_width, m_y );
 136     dc->DrawLine( m_x, m_y+m_height, m_x+m_width, m_y+m_height );
 137     dc->DrawLine( m_x+(m_width/2), m_y, m_x+(m_width/2), m_y+m_height );
 138 //  dc->DrawLine( m_x+(m_width/2)+1, m_y, m_x+(m_width/2)+1, m_y+m_height );
 139 }