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 licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_TIPWINDOW
  28
  29 #include "wx/tipwin.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/dcclient.h"
  33     #include "wx/timer.h"
  34     #include "wx/settings.h"
  35 #endif // WX_PRECOMP
  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 // wxTipWindowView
  46 // ----------------------------------------------------------------------------
  47
  48 // Viewer window to put in the frame
  49 class WXDLLEXPORT wxTipWindowView : public wxWindow
  50 {
  51 public:
  52     wxTipWindowView(wxWindow *parent);
  53
  54     // event handlers
  55     void OnPaint(wxPaintEvent& event);
  56     void OnMouseClick(wxMouseEvent& event);
  57     void OnMouseMove(wxMouseEvent& event);
  58
  59 #if !wxUSE_POPUPWIN
  60     void OnKillFocus(wxFocusEvent& event);
  61 #endif // wxUSE_POPUPWIN
  62
  63     // calculate the client rect we need to display the text
  64     void Adjust(const wxString& text, wxCoord maxLength);
  65
  66 private:
  67     wxTipWindow* m_parent;
  68
  69 #if !wxUSE_POPUPWIN
  70     long m_creationTime;
  71 #endif // !wxUSE_POPUPWIN
  72
  73     DECLARE_EVENT_TABLE()
  74     wxDECLARE_NO_COPY_CLASS(wxTipWindowView);
  75 };
  76
  77 // ============================================================================
  78 // implementation
  79 // ============================================================================
  80
  81 // ----------------------------------------------------------------------------
  82 // event tables
  83 // ----------------------------------------------------------------------------
  84
  85 BEGIN_EVENT_TABLE(wxTipWindow, wxTipWindowBase)
  86     EVT_LEFT_DOWN(wxTipWindow::OnMouseClick)
  87     EVT_RIGHT_DOWN(wxTipWindow::OnMouseClick)
  88     EVT_MIDDLE_DOWN(wxTipWindow::OnMouseClick)
  89
  90 #if !wxUSE_POPUPWIN
  91     EVT_KILL_FOCUS(wxTipWindow::OnKillFocus)
  92     EVT_ACTIVATE(wxTipWindow::OnActivate)
  93 #endif // !wxUSE_POPUPWIN
  94 END_EVENT_TABLE()
  95
  96 BEGIN_EVENT_TABLE(wxTipWindowView, wxWindow)
  97     EVT_PAINT(wxTipWindowView::OnPaint)
  98
  99     EVT_LEFT_DOWN(wxTipWindowView::OnMouseClick)
 100     EVT_RIGHT_DOWN(wxTipWindowView::OnMouseClick)
 101     EVT_MIDDLE_DOWN(wxTipWindowView::OnMouseClick)
 102
 103     EVT_MOTION(wxTipWindowView::OnMouseMove)
 104
 105 #if !wxUSE_POPUPWIN
 106     EVT_KILL_FOCUS(wxTipWindowView::OnKillFocus)
 107 #endif // !wxUSE_POPUPWIN
 108 END_EVENT_TABLE()
 109
 110 // ----------------------------------------------------------------------------
 111 // wxTipWindow
 112 // ----------------------------------------------------------------------------
 113
 114 wxTipWindow::wxTipWindow(wxWindow *parent,
 115                          const wxString& text,
 116                          wxCoord maxLength,
 117                          wxTipWindow** windowPtr,
 118                          wxRect *rectBounds)
 119 #if wxUSE_POPUPWIN
 120            : wxPopupTransientWindow(parent)
 121 #else
 122            : wxFrame(parent, wxID_ANY, wxEmptyString,
 123                      wxDefaultPosition, wxDefaultSize,
 124                      wxNO_BORDER | wxFRAME_NO_TASKBAR )
 125 #endif
 126 {
 127     SetTipWindowPtr(windowPtr);
 128     if ( rectBounds )
 129     {
 130         SetBoundingRect(*rectBounds);
 131     }
 132
 133     // set colours
 134     SetForegroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOTEXT));
 135     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOBK));
 136
 137     // set size, position and show it
 138     m_view = new wxTipWindowView(this);
 139     m_view->Adjust(text, maxLength);
 140     m_view->SetFocus();
 141
 142     int x, y;
 143     wxGetMousePosition(&x, &y);
 144
 145     // we want to show the tip below the mouse, not over it
 146     //
 147     // NB: the reason we use "/ 2" here is that we don't know where the current
 148     //     cursors hot spot is... it would be nice if we could find this out
 149     //     though
 150     y += wxSystemSettings::GetMetric(wxSYS_CURSOR_Y) / 2;
 151
 152 #if wxUSE_POPUPWIN
 153     Position(wxPoint(x, y), wxSize(0,0));
 154     Popup(m_view);
 155     #ifdef __WXGTK__
 156         m_view->CaptureMouse();
 157     #endif
 158 #else
 159     Move(x, y);
 160     Show(true);
 161 #endif
 162 }
 163
 164 wxTipWindow::~wxTipWindow()
 165 {
 166     if ( m_windowPtr )
 167     {
 168         *m_windowPtr = NULL;
 169     }
 170     #ifdef wxUSE_POPUPWIN
 171         #ifdef __WXGTK__
 172             if ( m_view->HasCapture() )
 173                 m_view->ReleaseMouse();
 174         #endif
 175     #endif
 176 }
 177
 178 void wxTipWindow::OnMouseClick(wxMouseEvent& WXUNUSED(event))
 179 {
 180     Close();
 181 }
 182
 183 #if wxUSE_POPUPWIN
 184
 185 void wxTipWindow::OnDismiss()
 186 {
 187     Close();
 188 }
 189
 190 #else // !wxUSE_POPUPWIN
 191
 192 void wxTipWindow::OnActivate(wxActivateEvent& event)
 193 {
 194     if (!event.GetActive())
 195         Close();
 196 }
 197
 198 void wxTipWindow::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 199 {
 200     // Under Windows at least, we will get this immediately
 201     // because when the view window is focussed, the
 202     // tip window goes out of focus.
 203 #ifdef __WXGTK__
 204     Close();
 205 #endif
 206 }
 207
 208 #endif // wxUSE_POPUPWIN // !wxUSE_POPUPWIN
 209
 210 void wxTipWindow::SetBoundingRect(const wxRect& rectBound)
 211 {
 212     m_rectBound = rectBound;
 213 }
 214
 215 void wxTipWindow::Close()
 216 {
 217     if ( m_windowPtr )
 218     {
 219         *m_windowPtr = NULL;
 220         m_windowPtr = NULL;
 221     }
 222
 223 #if wxUSE_POPUPWIN
 224     Show(false);
 225     #ifdef __WXGTK__
 226         if ( m_view->HasCapture() )
 227             m_view->ReleaseMouse();
 228     #endif
 229     Destroy();
 230 #else
 231     wxFrame::Close();
 232 #endif
 233 }
 234
 235 // ----------------------------------------------------------------------------
 236 // wxTipWindowView
 237 // ----------------------------------------------------------------------------
 238
 239 wxTipWindowView::wxTipWindowView(wxWindow *parent)
 240                : wxWindow(parent, wxID_ANY,
 241                           wxDefaultPosition, wxDefaultSize,
 242                           wxNO_BORDER)
 243 {
 244     // set colours
 245     SetForegroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOTEXT));
 246     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOBK));
 247
 248 #if !wxUSE_POPUPWIN
 249     m_creationTime = wxGetLocalTime();
 250 #endif // !wxUSE_POPUPWIN
 251
 252     m_parent = (wxTipWindow*)parent;
 253 }
 254
 255 void wxTipWindowView::Adjust(const wxString& text, wxCoord maxLength)
 256 {
 257     wxClientDC dc(this);
 258     dc.SetFont(GetFont());
 259
 260     // calculate the length: we want each line be no longer than maxLength
 261     // pixels and we only break lines at words boundary
 262     wxString current;
 263     wxCoord height, width,
 264             widthMax = 0;
 265     m_parent->m_heightLine = 0;
 266
 267     bool breakLine = false;
 268     for ( const wxChar *p = text.c_str(); ; p++ )
 269     {
 270         if ( *p == _T('\n') || *p == _T('\0') )
 271         {
 272             dc.GetTextExtent(current, &width, &height);
 273             if ( width > widthMax )
 274                 widthMax = width;
 275
 276             if ( height > m_parent->m_heightLine )
 277                 m_parent->m_heightLine = height;
 278
 279             m_parent->m_textLines.Add(current);
 280
 281             if ( !*p )
 282             {
 283                 // end of text
 284                 break;
 285             }
 286
 287             current.clear();
 288             breakLine = false;
 289         }
 290         else if ( breakLine && (*p == _T(' ') || *p == _T('\t')) )
 291         {
 292             // word boundary - break the line here
 293             m_parent->m_textLines.Add(current);
 294             current.clear();
 295             breakLine = false;
 296         }
 297         else // line goes on
 298         {
 299             current += *p;
 300             dc.GetTextExtent(current, &width, &height);
 301             if ( width > maxLength )
 302                 breakLine = true;
 303
 304             if ( width > widthMax )
 305                 widthMax = width;
 306
 307             if ( height > m_parent->m_heightLine )
 308                 m_parent->m_heightLine = height;
 309         }
 310     }
 311
 312     // take into account the border size and the margins
 313     width  = 2*(TEXT_MARGIN_X + 1) + widthMax;
 314     height = 2*(TEXT_MARGIN_Y + 1) + wx_truncate_cast(wxCoord, m_parent->m_textLines.GetCount())*m_parent->m_heightLine;
 315     m_parent->SetClientSize(width, height);
 316     SetSize(0, 0, width, height);
 317 }
 318
 319 void wxTipWindowView::OnPaint(wxPaintEvent& WXUNUSED(event))
 320 {
 321     wxPaintDC dc(this);
 322
 323     wxRect rect;
 324     wxSize size = GetClientSize();
 325     rect.width = size.x;
 326     rect.height = size.y;
 327
 328     // first filll the background
 329     dc.SetBrush(wxBrush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID));
 330     dc.SetPen(wxPen(GetForegroundColour(), 1, wxPENSTYLE_SOLID));
 331     dc.DrawRectangle(rect);
 332
 333     // and then draw the text line by line
 334     dc.SetTextBackground(GetBackgroundColour());
 335     dc.SetTextForeground(GetForegroundColour());
 336     dc.SetFont(GetFont());
 337
 338     wxPoint pt;
 339     pt.x = TEXT_MARGIN_X;
 340     pt.y = TEXT_MARGIN_Y;
 341     size_t count = m_parent->m_textLines.GetCount();
 342     for ( size_t n = 0; n < count; n++ )
 343     {
 344         dc.DrawText(m_parent->m_textLines[n], pt);
 345
 346         pt.y += m_parent->m_heightLine;
 347     }
 348 }
 349
 350 void wxTipWindowView::OnMouseClick(wxMouseEvent& WXUNUSED(event))
 351 {
 352     m_parent->Close();
 353 }
 354
 355 void wxTipWindowView::OnMouseMove(wxMouseEvent& event)
 356 {
 357     const wxRect& rectBound = m_parent->m_rectBound;
 358
 359     if ( rectBound.width &&
 360             !rectBound.Contains(ClientToScreen(event.GetPosition())) )
 361     {
 362         // mouse left the bounding rect, disappear
 363         m_parent->Close();
 364     }
 365     else
 366     {
 367         event.Skip();
 368     }
 369 }
 370
 371 #if !wxUSE_POPUPWIN
 372 void wxTipWindowView::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 373 {
 374     // Workaround the kill focus event happening just after creation in wxGTK
 375     if (wxGetLocalTime() > m_creationTime + 1)
 376         m_parent->Close();
 377 }
 378 #endif // !wxUSE_POPUPWIN
 379
 380 #endif // wxUSE_TIPWINDOW