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 END_EVENT_TABLE()
  59
  60 // ----------------------------------------------------------------------------
  61 // wxTipWindow
  62 // ----------------------------------------------------------------------------
  63
  64 wxTipWindow::wxTipWindow(wxWindow *parent,
  65                          const wxString& text,
  66                          wxCoord maxLength)
  67            : wxFrame(parent, -1, _T(""),
  68                      wxDefaultPosition, wxDefaultSize,
  69                      wxNO_BORDER | wxFRAME_FLOAT_ON_PARENT)
  70 {
  71     // set colours
  72     SetForegroundColour(*wxBLACK);
  73     SetBackgroundColour(wxColour(0xc3ffff));
  74
  75     // set position and size
  76     int x, y;
  77     wxGetMousePosition(&x, &y);
  78     Move(x, y + 20);
  79
  80     Adjust(text, maxLength);
  81
  82     // capture mouse as we want to dismiss the window when it is clicked
  83     CaptureMouse();
  84
  85     Show(TRUE);
  86 }
  87
  88 void wxTipWindow::Adjust(const wxString& text, wxCoord maxLength)
  89 {
  90     wxClientDC dc(this);
  91     dc.SetFont(GetFont());
  92
  93     // calculate the length: we want each line be no longer than maxLength
  94     // pixels and we only break lines at words boundary
  95     wxString current;
  96     wxCoord height, width,
  97             widthMax = 0;
  98     m_heightLine = 0;
  99
 100     bool breakLine = FALSE;
 101     for ( const wxChar *p = text.c_str(); ; p++ )
 102     {
 103         if ( *p == _T('\n') || *p == _T('\0') )
 104         {
 105             dc.GetTextExtent(current, &width, &height);
 106             if ( width > widthMax )
 107                 widthMax = width;
 108
 109             if ( height > m_heightLine )
 110                 m_heightLine = height;
 111
 112             m_textLines.Add(current);
 113
 114             if ( !*p )
 115             {
 116                 // end of text
 117                 break;
 118             }
 119
 120             current.clear();
 121             breakLine = FALSE;
 122         }
 123         else if ( breakLine && (*p == _T(' ') || *p == _T('\t')) )
 124         {
 125             // word boundary - break the line here
 126             m_textLines.Add(current);
 127             current.clear();
 128             breakLine = FALSE;
 129         }
 130         else // line goes on
 131         {
 132             current += *p;
 133             dc.GetTextExtent(current, &width, &height);
 134             if ( width > maxLength )
 135                 breakLine = TRUE;
 136
 137             if ( width > widthMax )
 138                 widthMax = width;
 139
 140             if ( height > m_heightLine )
 141                 m_heightLine = height;
 142         }
 143     }
 144
 145     // take into account the border size and the margins
 146     SetClientSize(2*(TEXT_MARGIN_X + 1) + widthMax,
 147                   2*(TEXT_MARGIN_Y + 1) + m_textLines.GetCount()*m_heightLine);
 148 }
 149
 150 void wxTipWindow::OnPaint(wxPaintEvent& event)
 151 {
 152     wxPaintDC dc(this);
 153
 154     wxRect rect;
 155     wxSize size = GetClientSize();
 156     rect.width = size.x;
 157     rect.height = size.y;
 158
 159     // first filll the background
 160     dc.SetBrush(wxBrush(GetBackgroundColour(), wxSOLID));
 161     dc.SetPen(*wxBLACK_PEN);
 162     dc.DrawRectangle(rect);
 163
 164     // and then draw the text line by line
 165     dc.SetFont(GetFont());
 166
 167     wxPoint pt;
 168     pt.x = TEXT_MARGIN_X;
 169     pt.y = TEXT_MARGIN_Y;
 170     size_t count = m_textLines.GetCount();
 171     for ( size_t n = 0; n < count; n++ )
 172     {
 173         dc.DrawText(m_textLines[n], pt);
 174
 175         pt.y += m_heightLine;
 176     }
 177 }
 178
 179 void wxTipWindow::OnMouseClick(wxMouseEvent& event)
 180 {
 181     ReleaseMouse();
 182
 183     Close();
 184 }