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 #include "wx/timer.h"
  37 #include "wx/settings.h"
  38
  39 // ----------------------------------------------------------------------------
  40 // constants
  41 // ----------------------------------------------------------------------------
  42
  43 static const wxCoord TEXT_MARGIN_X = 3;
  44 static const wxCoord TEXT_MARGIN_Y = 3;
  45
  46 // ============================================================================
  47 // implementation
  48 // ============================================================================
  49
  50 // ----------------------------------------------------------------------------
  51 // event tables
  52 // ----------------------------------------------------------------------------
  53
  54 BEGIN_EVENT_TABLE(wxTipWindow, wxPopupTransientWindow)
  55     EVT_LEFT_DOWN(wxTipWindow::OnMouseClick)
  56     EVT_RIGHT_DOWN(wxTipWindow::OnMouseClick)
  57     EVT_MIDDLE_DOWN(wxTipWindow::OnMouseClick)
  58     EVT_PAINT(wxTipWindow::OnPaint)
  59 END_EVENT_TABLE()
  60
  61
  62 // ----------------------------------------------------------------------------
  63 // wxTipWindow
  64 // ----------------------------------------------------------------------------
  65
  66 wxTipWindow::wxTipWindow(wxWindow *parent,
  67                          const wxString& text,
  68                          wxCoord maxLength, wxTipWindow** windowPtr)
  69            : wxPopupTransientWindow(parent)
  70 {
  71     m_windowPtr = windowPtr;
  72
  73     // set colours
  74     SetForegroundColour(*wxBLACK);
  75
  76 #ifdef __WXMSW__
  77     wxColour bkCol(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_INFOBK));
  78 #else
  79     wxColour bkCol(wxColour(255, 255, 225));
  80 #endif
  81     SetBackgroundColour(bkCol);
  82
  83     // set size and position
  84     Adjust(text, maxLength);
  85     int x, y;
  86     wxGetMousePosition(&x, &y);
  87     Position(wxPoint(x, y+10), wxSize(0,0));
  88
  89     //Show(TRUE);
  90     Popup();
  91     SetFocus();
  92 }
  93
  94 wxTipWindow::~wxTipWindow()
  95 {
  96     if (m_windowPtr)
  97     {
  98         *m_windowPtr = NULL;
  99     }
 100 }
 101
 102 void wxTipWindow::OnMouseClick(wxMouseEvent& WXUNUSED(event))
 103 {
 104     Close();
 105 }
 106
 107
 108 void wxTipWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 109 {
 110     wxPaintDC dc(this);
 111
 112     wxRect rect;
 113     wxSize size = GetClientSize();
 114     rect.width = size.x;
 115     rect.height = size.y;
 116
 117     // first filll the background
 118     dc.SetBrush(wxBrush(GetBackgroundColour(), wxSOLID));
 119
 120     dc.SetPen( * wxBLACK_PEN );
 121     dc.DrawRectangle(rect);
 122
 123     // and then draw the text line by line
 124     dc.SetFont(GetFont());
 125
 126     wxPoint pt;
 127     pt.x = TEXT_MARGIN_X;
 128     pt.y = TEXT_MARGIN_Y;
 129     size_t count = m_textLines.GetCount();
 130     for ( size_t n = 0; n < count; n++ )
 131     {
 132         dc.DrawText(m_textLines[n], pt);
 133
 134         pt.y += m_heightLine;
 135     }
 136 }
 137
 138
 139 void wxTipWindow::Adjust(const wxString& text, wxCoord maxLength)
 140 {
 141     wxClientDC dc(this);
 142     dc.SetFont(GetFont());
 143
 144     // calculate the length: we want each line be no longer than maxLength
 145     // pixels and we only break lines at words boundary
 146     wxString current;
 147     wxCoord height, width,
 148             widthMax = 0;
 149     m_heightLine = 0;
 150
 151     bool breakLine = FALSE;
 152     for ( const wxChar *p = text.c_str(); ; p++ )
 153     {
 154         if ( *p == _T('\n') || *p == _T('\0') )
 155         {
 156             dc.GetTextExtent(current, &width, &height);
 157             if ( width > widthMax )
 158                 widthMax = width;
 159
 160             if ( height > m_heightLine )
 161                 m_heightLine = height;
 162
 163             m_textLines.Add(current);
 164
 165             if ( !*p )
 166             {
 167                 // end of text
 168                 break;
 169             }
 170
 171             current.clear();
 172             breakLine = FALSE;
 173         }
 174         else if ( breakLine && (*p == _T(' ') || *p == _T('\t')) )
 175         {
 176             // word boundary - break the line here
 177             m_textLines.Add(current);
 178             current.clear();
 179             breakLine = FALSE;
 180         }
 181         else // line goes on
 182         {
 183             current += *p;
 184             dc.GetTextExtent(current, &width, &height);
 185             if ( width > maxLength )
 186                 breakLine = TRUE;
 187
 188             if ( width > widthMax )
 189                 widthMax = width;
 190
 191             if ( height > m_heightLine )
 192                 m_heightLine = height;
 193         }
 194     }
 195
 196     // take into account the border size and the margins
 197     SetClientSize(2*(TEXT_MARGIN_X + 1) + widthMax,
 198                   2*(TEXT_MARGIN_Y + 1) + m_textLines.GetCount() * m_heightLine);
 199 }
 200
 201
 202 void wxTipWindow::Close()
 203 {
 204     Show(FALSE);
 205     Destroy();
 206 }
 207
 208