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 precompilatixon, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/dcclient.h"
  29 #endif // WX_PRECOMP
  30 #ifdef __WXGTK__
  31     #include <gtk/gtk.h>
  32 #endif
  33 #include "wx/tipwin.h"
  34
  35 #if wxUSE_TIPWINDOW
  36
  37 #include "wx/timer.h"
  38 #include "wx/settings.h"
  39
  40 // ----------------------------------------------------------------------------
  41 // constants
  42 // ----------------------------------------------------------------------------
  43
  44 static const wxCoord TEXT_MARGIN_X = 3;
  45 static const wxCoord TEXT_MARGIN_Y = 3;
  46
  47 // ----------------------------------------------------------------------------
  48 // wxTipWindowView
  49 // ----------------------------------------------------------------------------
  50
  51 // Viewer window to put in the frame
  52 class WXDLLEXPORT wxTipWindowView : public wxWindow
  53 {
  54 public:
  55     wxTipWindowView(wxWindow *parent);
  56
  57     // event handlers
  58     void OnPaint(wxPaintEvent& event);
  59     void OnMouseClick(wxMouseEvent& event);
  60     void OnMouseMove(wxMouseEvent& event);
  61
  62 #if !wxUSE_POPUPWIN
  63     void OnKillFocus(wxFocusEvent& event);
  64 #endif // wxUSE_POPUPWIN
  65
  66     // calculate the client rect we need to display the text
  67     void Adjust(const wxString& text, wxCoord maxLength);
  68
  69 private:
  70     wxTipWindow* m_parent;
  71
  72 #if !wxUSE_POPUPWIN
  73     long m_creationTime;
  74 #endif // !wxUSE_POPUPWIN
  75
  76     DECLARE_EVENT_TABLE()
  77     DECLARE_NO_COPY_CLASS(wxTipWindowView)
  78 };
  79
  80 // ============================================================================
  81 // implementation
  82 // ============================================================================
  83
  84 // ----------------------------------------------------------------------------
  85 // event tables
  86 // ----------------------------------------------------------------------------
  87
  88 BEGIN_EVENT_TABLE(wxTipWindow, wxTipWindowBase)
  89     EVT_LEFT_DOWN(wxTipWindow::OnMouseClick)
  90     EVT_RIGHT_DOWN(wxTipWindow::OnMouseClick)
  91     EVT_MIDDLE_DOWN(wxTipWindow::OnMouseClick)
  92
  93 #if !wxUSE_POPUPWIN
  94     EVT_KILL_FOCUS(wxTipWindow::OnKillFocus)
  95     EVT_ACTIVATE(wxTipWindow::OnActivate)
  96 #endif // !wxUSE_POPUPWIN
  97 END_EVENT_TABLE()
  98
  99 BEGIN_EVENT_TABLE(wxTipWindowView, wxWindow)
 100     EVT_PAINT(wxTipWindowView::OnPaint)
 101
 102     EVT_LEFT_DOWN(wxTipWindowView::OnMouseClick)
 103     EVT_RIGHT_DOWN(wxTipWindowView::OnMouseClick)
 104     EVT_MIDDLE_DOWN(wxTipWindowView::OnMouseClick)
 105
 106     EVT_MOTION(wxTipWindowView::OnMouseMove)
 107
 108 #if !wxUSE_POPUPWIN
 109     EVT_KILL_FOCUS(wxTipWindowView::OnKillFocus)
 110 #endif // !wxUSE_POPUPWIN
 111 END_EVENT_TABLE()
 112
 113 // ----------------------------------------------------------------------------
 114 // wxTipWindow
 115 // ----------------------------------------------------------------------------
 116
 117 wxTipWindow::wxTipWindow(wxWindow *parent,
 118                          const wxString& text,
 119                          wxCoord maxLength,
 120                          wxTipWindow** windowPtr,
 121                          wxRect *rectBounds)
 122 #if wxUSE_POPUPWIN
 123            : wxPopupTransientWindow(parent)
 124 #else
 125            : wxFrame(parent, wxID_ANY, wxEmptyString,
 126                      wxDefaultPosition, wxDefaultSize,
 127                      wxNO_BORDER | wxFRAME_NO_TASKBAR )
 128 #endif
 129 {
 130     SetTipWindowPtr(windowPtr);
 131     if ( rectBounds )
 132     {
 133         SetBoundingRect(*rectBounds);
 134     }
 135
 136     // set colours
 137     SetForegroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOTEXT));
 138     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOBK));
 139
 140     // set size, position and show it
 141     m_view = new wxTipWindowView(this);
 142     m_view->Adjust(text, maxLength);
 143     m_view->SetFocus();
 144
 145     int x, y;
 146     wxGetMousePosition(&x, &y);
 147
 148     // we want to show the tip below the mouse, not over it
 149     //
 150     // NB: the reason we use "/ 2" here is that we don't know where the current
 151     //     cursors hot spot is... it would be nice if we could find this out
 152     //     though
 153     y += wxSystemSettings::GetMetric(wxSYS_CURSOR_Y) / 2;
 154
 155 #if wxUSE_POPUPWIN
 156     Position(wxPoint(x, y), wxSize(0,0));
 157     Popup(m_view);
 158     #ifdef __WXGTK__
 159         if (!GTK_WIDGET_HAS_GRAB(m_widget))
 160             gtk_grab_add( m_widget );
 161     #endif
 162 #else
 163     Move(x, y);
 164     Show(true);
 165 #endif
 166 }
 167
 168 wxTipWindow::~wxTipWindow()
 169 {
 170     if ( m_windowPtr )
 171     {
 172         *m_windowPtr = NULL;
 173     }
 174     #ifdef wxUSE_POPUPWIN
 175         #ifdef __WXGTK__
 176             if (GTK_WIDGET_HAS_GRAB(m_widget))
 177                 gtk_grab_remove( m_widget );
 178         #endif
 179     #endif
 180 }
 181
 182 void wxTipWindow::OnMouseClick(wxMouseEvent& WXUNUSED(event))
 183 {
 184     Close();
 185 }
 186
 187 #if wxUSE_POPUPWIN
 188
 189 void wxTipWindow::OnDismiss()
 190 {
 191     Close();
 192 }
 193
 194 #else // !wxUSE_POPUPWIN
 195
 196 void wxTipWindow::OnActivate(wxActivateEvent& event)
 197 {
 198     if (!event.GetActive())
 199         Close();
 200 }
 201
 202 void wxTipWindow::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 203 {
 204     // Under Windows at least, we will get this immediately
 205     // because when the view window is focussed, the
 206     // tip window goes out of focus.
 207 #ifdef __WXGTK__
 208     Close();
 209 #endif
 210 }
 211
 212 #endif // wxUSE_POPUPWIN // !wxUSE_POPUPWIN
 213
 214 void wxTipWindow::SetBoundingRect(const wxRect& rectBound)
 215 {
 216     m_rectBound = rectBound;
 217 }
 218
 219 void wxTipWindow::Close()
 220 {
 221     if ( m_windowPtr )
 222     {
 223         *m_windowPtr = NULL;
 224         m_windowPtr = NULL;
 225     }
 226
 227 #if wxUSE_POPUPWIN
 228     Show(false);
 229     #ifdef __WXGTK__
 230         if (GTK_WIDGET_HAS_GRAB(m_widget))
 231             gtk_grab_remove( m_widget );
 232     #endif
 233     Destroy();
 234 #else
 235     wxFrame::Close();
 236 #endif
 237 }
 238
 239 // ----------------------------------------------------------------------------
 240 // wxTipWindowView
 241 // ----------------------------------------------------------------------------
 242
 243 wxTipWindowView::wxTipWindowView(wxWindow *parent)
 244                : wxWindow(parent, wxID_ANY,
 245                           wxDefaultPosition, wxDefaultSize,
 246                           wxNO_BORDER)
 247 {
 248     // set colours
 249     SetForegroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOTEXT));
 250     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOBK));
 251
 252 #if !wxUSE_POPUPWIN
 253     m_creationTime = wxGetLocalTime();
 254 #endif // !wxUSE_POPUPWIN
 255
 256     m_parent = (wxTipWindow*)parent;
 257 }
 258
 259 void wxTipWindowView::Adjust(const wxString& text, wxCoord maxLength)
 260 {
 261     wxClientDC dc(this);
 262     dc.SetFont(GetFont());
 263
 264     // calculate the length: we want each line be no longer than maxLength
 265     // pixels and we only break lines at words boundary
 266     wxString current;
 267     wxCoord height, width,
 268             widthMax = 0;
 269     m_parent->m_heightLine = 0;
 270
 271     bool breakLine = false;
 272     for ( const wxChar *p = text.c_str(); ; p++ )
 273     {
 274         if ( *p == _T('\n') || *p == _T('\0') )
 275         {
 276             dc.GetTextExtent(current, &width, &height);
 277             if ( width > widthMax )
 278                 widthMax = width;
 279
 280             if ( height > m_parent->m_heightLine )
 281                 m_parent->m_heightLine = height;
 282
 283             m_parent->m_textLines.Add(current);
 284
 285             if ( !*p )
 286             {
 287                 // end of text
 288                 break;
 289             }
 290
 291             current.clear();
 292             breakLine = false;
 293         }
 294         else if ( breakLine && (*p == _T(' ') || *p == _T('\t')) )
 295         {
 296             // word boundary - break the line here
 297             m_parent->m_textLines.Add(current);
 298             current.clear();
 299             breakLine = false;
 300         }
 301         else // line goes on
 302         {
 303             current += *p;
 304             dc.GetTextExtent(current, &width, &height);
 305             if ( width > maxLength )
 306                 breakLine = true;
 307
 308             if ( width > widthMax )
 309                 widthMax = width;
 310
 311             if ( height > m_parent->m_heightLine )
 312                 m_parent->m_heightLine = height;
 313         }
 314     }
 315
 316     // take into account the border size and the margins
 317     width  = 2*(TEXT_MARGIN_X + 1) + widthMax;
 318     height = 2*(TEXT_MARGIN_Y + 1) + wx_truncate_cast(wxCoord, m_parent->m_textLines.GetCount())*m_parent->m_heightLine;
 319     m_parent->SetClientSize(width, height);
 320     SetSize(0, 0, width, height);
 321 }
 322
 323 void wxTipWindowView::OnPaint(wxPaintEvent& WXUNUSED(event))
 324 {
 325     wxPaintDC dc(this);
 326
 327     wxRect rect;
 328     wxSize size = GetClientSize();
 329     rect.width = size.x;
 330     rect.height = size.y;
 331
 332     // first filll the background
 333     dc.SetBrush(wxBrush(GetBackgroundColour(), wxSOLID));
 334     dc.SetPen( wxPen(GetForegroundColour(), 1, wxSOLID) );
 335     dc.DrawRectangle(rect);
 336
 337     // and then draw the text line by line
 338     dc.SetTextBackground(GetBackgroundColour());
 339     dc.SetTextForeground(GetForegroundColour());
 340     dc.SetFont(GetFont());
 341
 342     wxPoint pt;
 343     pt.x = TEXT_MARGIN_X;
 344     pt.y = TEXT_MARGIN_Y;
 345     size_t count = m_parent->m_textLines.GetCount();
 346     for ( size_t n = 0; n < count; n++ )
 347     {
 348         dc.DrawText(m_parent->m_textLines[n], pt);
 349
 350         pt.y += m_parent->m_heightLine;
 351     }
 352 }
 353
 354 void wxTipWindowView::OnMouseClick(wxMouseEvent& WXUNUSED(event))
 355 {
 356     m_parent->Close();
 357 }
 358
 359 void wxTipWindowView::OnMouseMove(wxMouseEvent& event)
 360 {
 361     const wxRect& rectBound = m_parent->m_rectBound;
 362
 363     if ( rectBound.width &&
 364             !rectBound.Inside(ClientToScreen(event.GetPosition())) )
 365     {
 366         // mouse left the bounding rect, disappear
 367         m_parent->Close();
 368     }
 369     else
 370     {
 371         event.Skip();
 372     }
 373 }
 374
 375 #if !wxUSE_POPUPWIN
 376 void wxTipWindowView::OnKillFocus(wxFocusEvent& WXUNUSED(event))
 377 {
 378     // Workaround the kill focus event happening just after creation in wxGTK
 379     if (wxGetLocalTime() > m_creationTime + 1)
 380         m_parent->Close();
 381 }
 382 #endif // !wxUSE_POPUPWIN
 383
 384 #endif // wxUSE_TIPWINDOW