src/univ/spinbutt.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        univ/spinbutt.cpp
   3 // Purpose:     implementation of the universal version of wxSpinButton
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     21.01.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "spinbutbase.h"
  22     #pragma implementation "univspinbutt.h"
  23 #endif
  24
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32 #endif
  33
  34 #include "wx/spinbutt.h"
  35
  36 #if wxUSE_SPINBTN
  37
  38 #include "wx/univ/renderer.h"
  39 #include "wx/univ/inphand.h"
  40 #include "wx/univ/theme.h"
  41
  42 // ============================================================================
  43 // implementation of wxSpinButton
  44 // ============================================================================
  45
  46 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxNotifyEvent)
  47 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton, wxControl)
  48
  49 // ----------------------------------------------------------------------------
  50 // creation
  51 // ----------------------------------------------------------------------------
  52
  53 #ifdef __VISUALC__
  54     // warning C4355: 'this' : used in base member initializer list
  55     #pragma warning(disable:4355)  // so what? disable it...
  56 #endif
  57
  58 wxSpinButton::wxSpinButton()
  59             : m_arrows(this)
  60 {
  61     Init();
  62 }
  63
  64 wxSpinButton::wxSpinButton(wxWindow *parent,
  65                            wxWindowID id,
  66                            const wxPoint& pos,
  67                            const wxSize& size,
  68                            long style,
  69                            const wxString& name)
  70             : m_arrows(this)
  71 {
  72     Init();
  73
  74     (void)Create(parent, id, pos, size, style, name);
  75 }
  76
  77 #ifdef __VISUALC__
  78     // warning C4355: 'this' : used in base member initializer list
  79     #pragma warning(default:4355)
  80 #endif
  81
  82 void wxSpinButton::Init()
  83 {
  84     for ( size_t n = 0; n < WXSIZEOF(m_arrowsState); n++ )
  85     {
  86         m_arrowsState[n] = 0;
  87     }
  88
  89     m_value = 0;
  90 }
  91
  92 bool wxSpinButton::Create(wxWindow *parent,
  93                           wxWindowID id,
  94                           const wxPoint& pos,
  95                           const wxSize& size,
  96                           long style,
  97                           const wxString& name)
  98 {
  99     // the spin buttons never have the border
 100     style &= ~wxBORDER_MASK;
 101
 102     if ( !wxSpinButtonBase::Create(parent, id, pos, size, style,
 103                                    wxDefaultValidator, name) )
 104         return FALSE;
 105
 106     SetBestSize(size);
 107
 108     CreateInputHandler(wxINP_HANDLER_SPINBTN);
 109
 110     return TRUE;
 111 }
 112
 113 // ----------------------------------------------------------------------------
 114 // value access
 115 // ----------------------------------------------------------------------------
 116
 117 void wxSpinButton::SetRange(int minVal, int maxVal)
 118 {
 119     wxSpinButtonBase::SetRange(minVal, maxVal);
 120
 121     // because the arrows disabled state might have changed - we don't check if
 122     // it really changed or not because SetRange() is called rarely enough and
 123     // son an extre refresh here doesn't really hurt
 124     Refresh();
 125 }
 126
 127 int wxSpinButton::GetValue() const
 128 {
 129     return m_value;
 130 }
 131
 132 void wxSpinButton::SetValue(int val)
 133 {
 134     if ( val != m_value )
 135     {
 136         m_value = val;
 137
 138         Refresh();
 139     }
 140 }
 141
 142 int wxSpinButton::NormalizeValue(int value) const
 143 {
 144     if ( value > m_max )
 145     {
 146         if ( GetWindowStyleFlag() & wxSP_WRAP )
 147             value = m_min + (value - m_max) % (m_max - m_min);
 148         else
 149             value = m_max;
 150     }
 151     else if ( value < m_min )
 152     {
 153         if ( GetWindowStyleFlag() & wxSP_WRAP )
 154             value = m_max - (m_min - value) % (m_max - m_min);
 155         else
 156             value = m_min;
 157     }
 158
 159     return value;
 160 }
 161
 162 bool wxSpinButton::ChangeValue(int inc)
 163 {
 164     int valueNew = NormalizeValue(m_value + inc);
 165
 166     if ( valueNew == m_value )
 167     {
 168         // nothing changed - most likely because we are already at min/max
 169         // value
 170         return FALSE;
 171     }
 172
 173     wxSpinEvent event(inc > 0 ? wxEVT_SCROLL_LINEUP : wxEVT_SCROLL_LINEDOWN,
 174                       GetId());
 175     event.SetPosition(valueNew);
 176     event.SetEventObject(this);
 177
 178     if ( GetEventHandler()->ProcessEvent(event) && !event.IsAllowed() )
 179     {
 180         // programm has vetoed the event
 181         return FALSE;
 182     }
 183
 184     m_value = valueNew;
 185
 186     // send wxEVT_SCROLL_THUMBTRACK as well
 187     event.SetEventType(wxEVT_SCROLL_THUMBTRACK);
 188     (void)GetEventHandler()->ProcessEvent(event);
 189
 190     return TRUE;
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // size calculations
 195 // ----------------------------------------------------------------------------
 196
 197 wxSize wxSpinButton::DoGetBestClientSize() const
 198 {
 199     // a spin button has by default the same size as two scrollbar arrows put
 200     // together
 201     wxSize size = m_renderer->GetScrollbarArrowSize();
 202     if ( IsVertical() )
 203     {
 204         size.y *= 2;
 205     }
 206     else
 207     {
 208         size.x *= 2;
 209     }
 210
 211     return size;
 212 }
 213
 214 // ----------------------------------------------------------------------------
 215 // wxControlWithArrows methods
 216 // ----------------------------------------------------------------------------
 217
 218 int wxSpinButton::GetArrowState(wxScrollArrows::Arrow arrow) const
 219 {
 220     int state = m_arrowsState[arrow];
 221
 222     // the arrow may also be disabled: either because the control is completely
 223     // disabled
 224     bool disabled = !IsEnabled();
 225
 226     if ( !disabled && !(GetWindowStyleFlag() & wxSP_WRAP) )
 227     {
 228         // ... or because we can't go any further - note that this never
 229         // happens if we just wrap
 230         if ( IsVertical() )
 231         {
 232             if ( arrow == wxScrollArrows::Arrow_First )
 233                 disabled = m_value == m_max;
 234             else
 235                 disabled = m_value == m_min;
 236         }
 237         else // horizontal
 238         {
 239             if ( arrow == wxScrollArrows::Arrow_First )
 240                 disabled = m_value == m_min;
 241             else
 242                 disabled = m_value == m_max;
 243         }
 244     }
 245
 246     if ( disabled )
 247     {
 248         state |= wxCONTROL_DISABLED;
 249     }
 250
 251     return state;
 252 }
 253
 254 void wxSpinButton::SetArrowFlag(wxScrollArrows::Arrow arrow, int flag, bool set)
 255 {
 256     int state = m_arrowsState[arrow];
 257     if ( set )
 258         state |= flag;
 259     else
 260         state &= ~flag;
 261
 262     if ( state != m_arrowsState[arrow] )
 263     {
 264         m_arrowsState[arrow] = state;
 265         Refresh();
 266     }
 267 }
 268
 269 bool wxSpinButton::OnArrow(wxScrollArrows::Arrow arrow)
 270 {
 271     int valueOld = GetValue();
 272
 273     wxControlAction action;
 274     if ( arrow == wxScrollArrows::Arrow_First )
 275         action = IsVertical() ? wxACTION_SPIN_INC : wxACTION_SPIN_DEC;
 276     else
 277         action = IsVertical() ? wxACTION_SPIN_DEC : wxACTION_SPIN_INC;
 278
 279     PerformAction(action);
 280
 281     // did we scroll to the end?
 282     return GetValue() != valueOld;
 283 }
 284
 285 // ----------------------------------------------------------------------------
 286 // drawing
 287 // ----------------------------------------------------------------------------
 288
 289 void wxSpinButton::DoDraw(wxControlRenderer *renderer)
 290 {
 291     wxRect rectArrow1, rectArrow2;
 292     CalcArrowRects(&rectArrow1, &rectArrow2);
 293
 294     wxDC& dc = renderer->GetDC();
 295     m_arrows.DrawArrow(wxScrollArrows::Arrow_First, dc, rectArrow1);
 296     m_arrows.DrawArrow(wxScrollArrows::Arrow_Second, dc, rectArrow2);
 297 }
 298
 299 // ----------------------------------------------------------------------------
 300 // geometry
 301 // ----------------------------------------------------------------------------
 302
 303 void wxSpinButton::CalcArrowRects(wxRect *rect1, wxRect *rect2) const
 304 {
 305     // calculate the rectangles for both arrows: note that normally the 2
 306     // arrows are adjacent to each other but if the total control width/height
 307     // is odd, we can have 1 pixel between them
 308     wxRect rectTotal = GetClientRect();
 309
 310     *rect1 =
 311     *rect2 = rectTotal;
 312     if ( IsVertical() )
 313     {
 314         rect1->height /= 2;
 315         rect2->height /= 2;
 316
 317         rect2->y += rect1->height;
 318         if ( rectTotal.height % 2 )
 319             rect2->y++;
 320     }
 321     else // horizontal
 322     {
 323         rect1->width /= 2;
 324         rect2->width /= 2;
 325
 326         rect2->x += rect1->width;
 327         if ( rectTotal.width % 2 )
 328             rect2->x++;
 329     }
 330 }
 331
 332 wxScrollArrows::Arrow wxSpinButton::HitTest(const wxPoint& pt) const
 333 {
 334     wxRect rectArrow1, rectArrow2;
 335     CalcArrowRects(&rectArrow1, &rectArrow2);
 336
 337     if ( rectArrow1.Inside(pt) )
 338         return wxScrollArrows::Arrow_First;
 339     else if ( rectArrow2.Inside(pt) )
 340         return wxScrollArrows::Arrow_Second;
 341     else
 342         return wxScrollArrows::Arrow_None;
 343 }
 344
 345 // ----------------------------------------------------------------------------
 346 // input processing
 347 // ----------------------------------------------------------------------------
 348
 349 bool wxSpinButton::PerformAction(const wxControlAction& action,
 350                                  long numArg,
 351                                  const wxString& strArg)
 352 {
 353     if ( action == wxACTION_SPIN_INC )
 354         ChangeValue(+1);
 355     else if ( action == wxACTION_SPIN_DEC )
 356         ChangeValue(-1);
 357     else
 358         return wxControl::PerformAction(action, numArg, strArg);
 359
 360     return TRUE;
 361 }
 362
 363 // ----------------------------------------------------------------------------
 364 // wxStdSpinButtonInputHandler
 365 // ----------------------------------------------------------------------------
 366
 367 wxStdSpinButtonInputHandler::
 368 wxStdSpinButtonInputHandler(wxInputHandler *inphand)
 369     : wxStdInputHandler(inphand)
 370 {
 371 }
 372
 373 bool wxStdSpinButtonInputHandler::HandleKey(wxControl *control,
 374                                             const wxKeyEvent& event,
 375                                             bool pressed)
 376 {
 377     if ( pressed )
 378     {
 379         wxControlAction action;
 380         switch ( event.GetKeyCode() )
 381         {
 382             case WXK_DOWN:
 383             case WXK_RIGHT:
 384                 action = wxACTION_SPIN_DEC;
 385                 break;
 386
 387             case WXK_UP:
 388             case WXK_LEFT:
 389                 action = wxACTION_SPIN_INC;
 390                 break;
 391         }
 392
 393         if ( !!action )
 394         {
 395             control->PerformAction(action);
 396
 397             return TRUE;
 398         }
 399     }
 400
 401     return wxStdInputHandler::HandleKey(control, event, pressed);
 402 }
 403
 404 bool wxStdSpinButtonInputHandler::HandleMouse(wxControl *control,
 405                                               const wxMouseEvent& event)
 406 {
 407     wxSpinButton *spinbtn = wxStaticCast(control, wxSpinButton);
 408
 409     if ( spinbtn->GetArrows().HandleMouse(event) )
 410     {
 411         // don't refresh, everything is already done
 412         return FALSE;
 413     }
 414
 415     return wxStdInputHandler::HandleMouse(control, event);
 416 }
 417
 418 bool wxStdSpinButtonInputHandler::HandleMouseMove(wxControl *control,
 419                                                   const wxMouseEvent& event)
 420 {
 421     wxSpinButton *spinbtn = wxStaticCast(control, wxSpinButton);
 422
 423     if ( spinbtn->GetArrows().HandleMouseMove(event) )
 424     {
 425         // processed by the arrows
 426         return FALSE;
 427     }
 428
 429     return wxStdInputHandler::HandleMouseMove(control, event);
 430 }
 431
 432
 433 #endif // wxUSE_SPINBTN