src/generic/tipwin.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/tipwin.cpp
   3 // Purpose:     implementation of wxTipWindow
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     10.09.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "tipwin.h"
  22 #endif
  23
  24 // For compilers that support precompilatixon, includes "wx/wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/dcclient.h"
  33 #endif // WX_PRECOMP
  34
  35 #include "wx/tipwin.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // constants
  39 // ----------------------------------------------------------------------------
  40
  41 static const wxCoord TEXT_MARGIN_X = 3;
  42 static const wxCoord TEXT_MARGIN_Y = 3;
  43
  44 // ============================================================================
  45 // implementation
  46 // ============================================================================
  47
  48 // ----------------------------------------------------------------------------
  49 // event tables
  50 // ----------------------------------------------------------------------------
  51
  52 BEGIN_EVENT_TABLE(wxTipWindow, wxFrame)
  53     EVT_PAINT(wxTipWindow::OnPaint)
  54
  55     EVT_LEFT_DOWN(wxTipWindow::OnMouseClick)
  56     EVT_RIGHT_DOWN(wxTipWindow::OnMouseClick)
  57     EVT_MIDDLE_DOWN(wxTipWindow::OnMouseClick)
  58     EVT_KILL_FOCUS(wxTipWindow::OnKillFocus)
  59     EVT_ACTIVATE(wxTipWindow::OnActivate)
  60 END_EVENT_TABLE()
  61
  62 // ----------------------------------------------------------------------------
  63 // wxTipWindow
  64 // ----------------------------------------------------------------------------
  65
  66 wxTipWindow::wxTipWindow(wxWindow *parent,
  67                          const wxString& text,
  68                          wxCoord maxLength)
  69            : wxFrame(parent, -1, _T(""),
  70                      wxDefaultPosition, wxDefaultSize,
  71                      wxNO_BORDER | wxFRAME_FLOAT_ON_PARENT)
  72 {
  73     // set colours
  74     SetForegroundColour(*wxBLACK);
  75 #if !defined(__WXPM__)
  76     SetBackgroundColour(wxColour(0xc3ffff));
  77 #else
  78     // What is 0xc3ffff, try some legable documentation for those of us who don't memorize hex codes??
  79     SetBackgroundColour(wxColour(*wxWHITE));
  80 #endif
  81     // set position and size
  82     int x, y;
  83     wxGetMousePosition(&x, &y);
  84     Move(x, y + 20);
  85
  86     Adjust(text, maxLength);
  87
  88     SetFocus();
  89
  90     Show(TRUE);
  91 }
  92
  93 void wxTipWindow::Adjust(const wxString& text, wxCoord maxLength)
  94 {
  95     wxClientDC dc(this);
  96     dc.SetFont(GetFont());
  97
  98     // calculate the length: we want each line be no longer than maxLength
  99     // pixels and we only break lines at words boundary
 100     wxString current;
 101     wxCoord height, width,
 102             widthMax = 0;
 103     m_heightLine = 0;
 104
 105     bool breakLine = FALSE;
 106     for ( const wxChar *p = text.c_str(); ; p++ )
 107     {
 108         if ( *p == _T('\n') || *p == _T('\0') )
 109         {
 110             dc.GetTextExtent(current, &width, &height);
 111             if ( width > widthMax )
 112                 widthMax = width;
 113
 114             if ( height > m_heightLine )
 115                 m_heightLine = height;
 116
 117             m_textLines.Add(current);
 118
 119             if ( !*p )
 120             {
 121                 // end of text
 122                 break;
 123             }
 124
 125             current.clear();
 126             breakLine = FALSE;
 127         }
 128         else if ( breakLine && (*p == _T(' ') || *p == _T('\t')) )
 129         {
 130             // word boundary - break the line here
 131             m_textLines.Add(current);
 132             current.clear();
 133             breakLine = FALSE;
 134         }
 135         else // line goes on
 136         {
 137             current += *p;
 138             dc.GetTextExtent(current, &width, &height);
 139             if ( width > maxLength )
 140                 breakLine = TRUE;
 141
 142             if ( width > widthMax )
 143                 widthMax = width;
 144
 145             if ( height > m_heightLine )
 146                 m_heightLine = height;
 147         }
 148     }
 149
 150     // take into account the border size and the margins
 151     SetClientSize(2*(TEXT_MARGIN_X + 1) + widthMax,
 152                   2*(TEXT_MARGIN_Y + 1) + m_textLines.GetCount()*m_heightLine);
 153 }
 154
 155 void wxTipWindow::OnPaint(wxPaintEvent& event)
 156 {
 157     wxPaintDC dc(this);
 158
 159     wxRect rect;
 160     wxSize size = GetClientSize();
 161     rect.width = size.x;
 162     rect.height = size.y;
 163
 164     // first filll the background
 165     dc.SetBrush(wxBrush(GetBackgroundColour(), wxSOLID));
 166
 167     // Under Windows, you apparently get a thin black border whether you like it or not :-(
 168 #ifdef __WXMSW__
 169     dc.SetPen( * wxTRANSPARENT_PEN );
 170 #else
 171     dc.SetPen( * wxBLACK_PEN );
 172 #endif
 173     dc.DrawRectangle(rect);
 174
 175     // and then draw the text line by line
 176     dc.SetFont(GetFont());
 177
 178     wxPoint pt;
 179     pt.x = TEXT_MARGIN_X;
 180     pt.y = TEXT_MARGIN_Y;
 181     size_t count = m_textLines.GetCount();
 182     for ( size_t n = 0; n < count; n++ )
 183     {
 184         dc.DrawText(m_textLines[n], pt);
 185
 186         pt.y += m_heightLine;
 187     }
 188 }
 189
 190 void wxTipWindow::OnMouseClick(wxMouseEvent& event)
 191 {
 192     Close();
 193 }
 194
 195 void wxTipWindow::OnActivate(wxActivateEvent& event)
 196 {
 197     if (!event.GetActive())
 198         Close();
 199 }
 200
 201 void wxTipWindow::OnKillFocus(wxFocusEvent& event)
 202 {
 203     Close();
 204 }