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     SetBackgroundColour(wxColour(0xc3ffff));
  76
  77     // set position and size
  78     int x, y;
  79     wxGetMousePosition(&x, &y);
  80     Move(x, y + 20);
  81
  82     Adjust(text, maxLength);
  83
  84     SetFocus();
  85
  86     Show(TRUE);
  87 }
  88
  89 void wxTipWindow::Adjust(const wxString& text, wxCoord maxLength)
  90 {
  91     wxClientDC dc(this);
  92     dc.SetFont(GetFont());
  93
  94     // calculate the length: we want each line be no longer than maxLength
  95     // pixels and we only break lines at words boundary
  96     wxString current;
  97     wxCoord height, width,
  98             widthMax = 0;
  99     m_heightLine = 0;
 100
 101     bool breakLine = FALSE;
 102     for ( const wxChar *p = text.c_str(); ; p++ )
 103     {
 104         if ( *p == _T('\n') || *p == _T('\0') )
 105         {
 106             dc.GetTextExtent(current, &width, &height);
 107             if ( width > widthMax )
 108                 widthMax = width;
 109
 110             if ( height > m_heightLine )
 111                 m_heightLine = height;
 112
 113             m_textLines.Add(current);
 114
 115             if ( !*p )
 116             {
 117                 // end of text
 118                 break;
 119             }
 120
 121             current.clear();
 122             breakLine = FALSE;
 123         }
 124         else if ( breakLine && (*p == _T(' ') || *p == _T('\t')) )
 125         {
 126             // word boundary - break the line here
 127             m_textLines.Add(current);
 128             current.clear();
 129             breakLine = FALSE;
 130         }
 131         else // line goes on
 132         {
 133             current += *p;
 134             dc.GetTextExtent(current, &width, &height);
 135             if ( width > maxLength )
 136                 breakLine = TRUE;
 137
 138             if ( width > widthMax )
 139                 widthMax = width;
 140
 141             if ( height > m_heightLine )
 142                 m_heightLine = height;
 143         }
 144     }
 145
 146     // take into account the border size and the margins
 147     SetClientSize(2*(TEXT_MARGIN_X + 1) + widthMax,
 148                   2*(TEXT_MARGIN_Y + 1) + m_textLines.GetCount()*m_heightLine);
 149 }
 150
 151 void wxTipWindow::OnPaint(wxPaintEvent& event)
 152 {
 153     wxPaintDC dc(this);
 154
 155     wxRect rect;
 156     wxSize size = GetClientSize();
 157     rect.width = size.x;
 158     rect.height = size.y;
 159
 160     // first filll the background
 161     dc.SetBrush(wxBrush(GetBackgroundColour(), wxSOLID));
 162
 163     // Under Windows, you apparently get a thin black border whether you like it or not :-(
 164 #ifdef __WXMSW__
 165     dc.SetPen( * wxTRANSPARENT_PEN );
 166 #else
 167     dc.SetPen( * wxBLACK_PEN );
 168 #endif
 169     dc.DrawRectangle(rect);
 170
 171     // and then draw the text line by line
 172     dc.SetFont(GetFont());
 173
 174     wxPoint pt;
 175     pt.x = TEXT_MARGIN_X;
 176     pt.y = TEXT_MARGIN_Y;
 177     size_t count = m_textLines.GetCount();
 178     for ( size_t n = 0; n < count; n++ )
 179     {
 180         dc.DrawText(m_textLines[n], pt);
 181
 182         pt.y += m_heightLine;
 183     }
 184 }
 185
 186 void wxTipWindow::OnMouseClick(wxMouseEvent& event)
 187 {
 188     Close();
 189 }
 190
 191 void wxTipWindow::OnActivate(wxActivateEvent& event)
 192 {
 193     if (!event.GetActive())
 194         Close();
 195 }
 196
 197 void wxTipWindow::OnKillFocus(wxFocusEvent& event)
 198 {
 199     Close();
 200 }