src/generic/spinctlg.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/spinctlg.cpp
   3 // Purpose:     implements wxSpinCtrl as a composite control
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     29.01.01
   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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/textctrl.h"
  29 #endif //WX_PRECOMP
  30
  31 #include "wx/spinctrl.h"
  32 #include "wx/tooltip.h"
  33
  34 #if wxUSE_SPINCTRL
  35
  36 IMPLEMENT_DYNAMIC_CLASS(wxSpinDoubleEvent, wxNotifyEvent)
  37
  38 // There are port-specific versions for the wxSpinCtrl, so exclude the
  39 // contents of this file in those cases
  40 #if !defined(wxHAS_NATIVE_SPINCTRL) || !defined(wxHAS_NATIVE_SPINCTRLDOUBLE)
  41
  42 #include "wx/spinbutt.h"
  43
  44 #if wxUSE_SPINBTN
  45
  46 // ----------------------------------------------------------------------------
  47 // constants
  48 // ----------------------------------------------------------------------------
  49
  50 // The margin between the text control and the spin: the value here is the same
  51 // as the margin between the spin button and its "buddy" text control in wxMSW
  52 // so the generic control looks similarly to the native one there, we might
  53 // need to use different value for the other platforms (and maybe even
  54 // determine it dynamically?).
  55 static const wxCoord MARGIN = 1;
  56
  57 #define SPINCTRLBUT_MAX 32000 // large to avoid wrap around trouble
  58
  59 // ----------------------------------------------------------------------------
  60 // wxSpinCtrlTextGeneric: text control used by spin control
  61 // ----------------------------------------------------------------------------
  62
  63 class wxSpinCtrlTextGeneric : public wxTextCtrl
  64 {
  65 public:
  66     wxSpinCtrlTextGeneric(wxSpinCtrlGenericBase *spin, const wxString& value, long style=0)
  67         : wxTextCtrl(spin->GetParent(), wxID_ANY, value, wxDefaultPosition, wxDefaultSize,
  68                      style & wxALIGN_MASK)
  69     {
  70         m_spin = spin;
  71
  72         // remove the default minsize, the spinctrl will have one instead
  73         SetSizeHints(wxDefaultCoord, wxDefaultCoord);
  74     }
  75
  76     virtual ~wxSpinCtrlTextGeneric()
  77     {
  78         // MSW sends extra kill focus event on destroy
  79         if (m_spin)
  80             m_spin->m_textCtrl = NULL;
  81
  82         m_spin = NULL;
  83     }
  84
  85     void OnChar( wxKeyEvent &event )
  86     {
  87         if (m_spin)
  88             m_spin->ProcessWindowEvent(event);
  89     }
  90
  91     void OnKillFocus(wxFocusEvent& event)
  92     {
  93         if (m_spin)
  94             m_spin->ProcessWindowEvent(event);
  95
  96         event.Skip();
  97     }
  98
  99     wxSpinCtrlGenericBase *m_spin;
 100
 101 private:
 102     DECLARE_EVENT_TABLE()
 103 };
 104
 105 BEGIN_EVENT_TABLE(wxSpinCtrlTextGeneric, wxTextCtrl)
 106     EVT_CHAR(wxSpinCtrlTextGeneric::OnChar)
 107
 108     EVT_KILL_FOCUS(wxSpinCtrlTextGeneric::OnKillFocus)
 109 END_EVENT_TABLE()
 110
 111 // ----------------------------------------------------------------------------
 112 // wxSpinCtrlButtonGeneric: spin button used by spin control
 113 // ----------------------------------------------------------------------------
 114
 115 class wxSpinCtrlButtonGeneric : public wxSpinButton
 116 {
 117 public:
 118     wxSpinCtrlButtonGeneric(wxSpinCtrlGenericBase *spin, int style)
 119         : wxSpinButton(spin->GetParent(), wxID_ANY, wxDefaultPosition,
 120                        wxDefaultSize, style | wxSP_VERTICAL)
 121     {
 122         m_spin = spin;
 123
 124         SetRange(-SPINCTRLBUT_MAX, SPINCTRLBUT_MAX);
 125
 126         // remove the default minsize, the spinctrl will have one instead
 127         SetSizeHints(wxDefaultCoord, wxDefaultCoord);
 128     }
 129
 130     void OnSpinButton(wxSpinEvent& event)
 131     {
 132         if (m_spin)
 133             m_spin->OnSpinButton(event);
 134     }
 135
 136     wxSpinCtrlGenericBase *m_spin;
 137
 138 private:
 139     DECLARE_EVENT_TABLE()
 140 };
 141
 142 BEGIN_EVENT_TABLE(wxSpinCtrlButtonGeneric, wxSpinButton)
 143     EVT_SPIN_UP(  wxID_ANY, wxSpinCtrlButtonGeneric::OnSpinButton)
 144     EVT_SPIN_DOWN(wxID_ANY, wxSpinCtrlButtonGeneric::OnSpinButton)
 145 END_EVENT_TABLE()
 146
 147 // ============================================================================
 148 // wxSpinCtrlGenericBase
 149 // ============================================================================
 150
 151 // ----------------------------------------------------------------------------
 152 // wxSpinCtrlGenericBase creation
 153 // ----------------------------------------------------------------------------
 154
 155 void wxSpinCtrlGenericBase::Init()
 156 {
 157     m_value         = 0;
 158     m_min           = 0;
 159     m_max           = 100;
 160     m_increment     = 1;
 161     m_snap_to_ticks = false;
 162     m_format        = wxS("%g");
 163
 164     m_spin_value    = 0;
 165
 166     m_textCtrl = NULL;
 167     m_spinButton  = NULL;
 168 }
 169
 170 bool wxSpinCtrlGenericBase::Create(wxWindow *parent,
 171                                    wxWindowID id,
 172                                    const wxString& value,
 173                                    const wxPoint& pos, const wxSize& size,
 174                                    long style,
 175                                    double min, double max, double initial,
 176                                    double increment,
 177                                    const wxString& name)
 178 {
 179     // don't use borders for this control itself, it wouldn't look good with
 180     // the text control borders (but we might want to use style border bits to
 181     // select the text control style)
 182     if ( !wxControl::Create(parent, id, wxDefaultPosition, wxDefaultSize,
 183                             (style & ~wxBORDER_MASK) | wxBORDER_NONE,
 184                             wxDefaultValidator, name) )
 185     {
 186         return false;
 187     }
 188
 189     m_value = initial;
 190     m_min   = min;
 191     m_max   = max;
 192     m_increment = increment;
 193
 194     m_textCtrl   = new wxSpinCtrlTextGeneric(this, value, style);
 195     m_spinButton = new wxSpinCtrlButtonGeneric(this, style);
 196 #if wxUSE_TOOLTIPS
 197     m_textCtrl->SetToolTip(GetToolTipText());
 198     m_spinButton->SetToolTip(GetToolTipText());
 199 #endif // wxUSE_TOOLTIPS
 200
 201     m_spin_value = m_spinButton->GetValue();
 202
 203     // the string value overrides the numeric one (for backwards compatibility
 204     // reasons and also because it is simpler to satisfy the string value which
 205     // comes much sooner in the list of arguments and leave the initial
 206     // parameter unspecified)
 207     if ( !value.empty() )
 208     {
 209         double d;
 210         if ( value.ToDouble(&d) )
 211         {
 212             m_value = d;
 213             m_textCtrl->SetValue(wxString::Format(m_format, m_value));
 214         }
 215     }
 216
 217     SetInitialSize(size);
 218     Move(pos);
 219
 220     // have to disable this window to avoid interfering it with message
 221     // processing to the text and the button... but pretend it is enabled to
 222     // make IsEnabled() return true
 223     wxControl::Enable(false); // don't use non virtual Disable() here!
 224     m_isEnabled = true;
 225
 226     // we don't even need to show this window itself - and not doing it avoids
 227     // that it overwrites the text control
 228     wxControl::Show(false);
 229     m_isShown = true;
 230     return true;
 231 }
 232
 233 wxSpinCtrlGenericBase::~wxSpinCtrlGenericBase()
 234 {
 235     // delete the controls now, don't leave them alive even though they would
 236     // still be eventually deleted by our parent - but it will be too late, the
 237     // user code expects them to be gone now
 238
 239     if (m_textCtrl)
 240     {
 241         // null this since MSW sends KILL_FOCUS on deletion, see ~wxSpinCtrlTextGeneric
 242         wxDynamicCast(m_textCtrl, wxSpinCtrlTextGeneric)->m_spin = NULL;
 243
 244         wxSpinCtrlTextGeneric *text = (wxSpinCtrlTextGeneric*)m_textCtrl;
 245         m_textCtrl = NULL;
 246         delete text;
 247     }
 248
 249     wxDELETE(m_spinButton);
 250 }
 251
 252 // ----------------------------------------------------------------------------
 253 // geometry
 254 // ----------------------------------------------------------------------------
 255
 256 wxSize wxSpinCtrlGenericBase::DoGetBestSize() const
 257 {
 258     wxSize sizeBtn  = m_spinButton->GetBestSize(),
 259            sizeText = m_textCtrl->GetBestSize();
 260
 261     return wxSize(sizeBtn.x + sizeText.x + MARGIN, sizeText.y);
 262 }
 263
 264 void wxSpinCtrlGenericBase::DoMoveWindow(int x, int y, int width, int height)
 265 {
 266     wxControl::DoMoveWindow(x, y, width, height);
 267
 268     // position the subcontrols inside the client area
 269     wxSize sizeBtn = m_spinButton->GetSize();
 270
 271     wxCoord wText = width - sizeBtn.x - MARGIN;
 272     m_textCtrl->SetSize(x, y, wText, height);
 273     m_spinButton->SetSize(x + wText + MARGIN, y, wxDefaultCoord, height);
 274 }
 275
 276 // ----------------------------------------------------------------------------
 277 // operations forwarded to the subcontrols
 278 // ----------------------------------------------------------------------------
 279
 280 void wxSpinCtrlGenericBase::SetFocus()
 281 {
 282     if ( m_textCtrl )
 283         m_textCtrl->SetFocus();
 284 }
 285
 286 #ifdef __WXMSW__
 287
 288 void wxSpinCtrlGenericBase::DoEnable(bool enable)
 289 {
 290     // We never enable this control itself, it must stay disabled to avoid
 291     // interfering with the siblings event handling (see e.g. #12045 for the
 292     // kind of problems which arise otherwise).
 293     if ( !enable )
 294         wxSpinCtrlBase::DoEnable(enable);
 295 }
 296
 297 #endif // __WXMSW__
 298
 299 bool wxSpinCtrlGenericBase::Enable(bool enable)
 300 {
 301     if ( !wxSpinCtrlBase::Enable(enable) )
 302         return false;
 303
 304     m_spinButton->Enable(enable);
 305     m_textCtrl->Enable(enable);
 306
 307     return true;
 308 }
 309
 310 bool wxSpinCtrlGenericBase::Show(bool show)
 311 {
 312     if ( !wxControl::Show(show) )
 313         return false;
 314
 315     // under GTK Show() is called the first time before we are fully
 316     // constructed
 317     if ( m_spinButton )
 318     {
 319         m_spinButton->Show(show);
 320         m_textCtrl->Show(show);
 321     }
 322
 323     return true;
 324 }
 325
 326 #if wxUSE_TOOLTIPS
 327 void wxSpinCtrlGenericBase::DoSetToolTip(wxToolTip *tip)
 328 {
 329     // Notice that we must check for the subcontrols not being NULL (as they
 330     // could be if we were created with the default ctor and this is called
 331     // before Create() for some reason) and that we can't call SetToolTip(tip)
 332     // because this would take ownership of the wxToolTip object (twice).
 333     if ( m_textCtrl )
 334     {
 335         if ( tip )
 336             m_textCtrl->SetToolTip(tip->GetTip());
 337         else
 338             m_textCtrl->SetToolTip(NULL);
 339     }
 340
 341     if ( m_spinButton )
 342     {
 343         if( tip )
 344             m_spinButton->SetToolTip(tip->GetTip());
 345         else
 346             m_spinButton->SetToolTip(NULL);
 347     }
 348
 349     wxWindowBase::DoSetToolTip(tip);
 350 }
 351 #endif // wxUSE_TOOLTIPS
 352
 353 // ----------------------------------------------------------------------------
 354 // Handle sub controls events
 355 // ----------------------------------------------------------------------------
 356
 357 BEGIN_EVENT_TABLE(wxSpinCtrlGenericBase, wxSpinCtrlBase)
 358     EVT_CHAR(wxSpinCtrlGenericBase::OnTextChar)
 359     EVT_KILL_FOCUS(wxSpinCtrlGenericBase::OnTextLostFocus)
 360 END_EVENT_TABLE()
 361
 362 void wxSpinCtrlGenericBase::OnSpinButton(wxSpinEvent& event)
 363 {
 364     event.Skip();
 365
 366     // Sync the textctrl since the user expects that the button will modify
 367     // what they see in the textctrl.
 368     SyncSpinToText();
 369
 370     int spin_value = event.GetPosition();
 371     double step = (event.GetEventType() == wxEVT_SCROLL_LINEUP) ? 1 : -1;
 372
 373     // Use the spinbutton's acceleration, if any, but not if wrapping around
 374     if (((spin_value >= 0) && (m_spin_value >= 0)) || ((spin_value <= 0) && (m_spin_value <= 0)))
 375         step *= abs(spin_value - m_spin_value);
 376
 377     double value = AdjustToFitInRange(m_value + step*m_increment);
 378
 379     // Ignore the edges when it wraps since the up/down event may be opposite
 380     // They are in GTK and Mac
 381     if (abs(spin_value - m_spin_value) > SPINCTRLBUT_MAX)
 382     {
 383         m_spin_value = spin_value;
 384         return;
 385     }
 386
 387     m_spin_value = spin_value;
 388
 389     if ( DoSetValue(value) )
 390         DoSendEvent();
 391 }
 392
 393 void wxSpinCtrlGenericBase::OnTextLostFocus(wxFocusEvent& event)
 394 {
 395     SyncSpinToText();
 396     DoSendEvent();
 397
 398     event.Skip();
 399 }
 400
 401 void wxSpinCtrlGenericBase::OnTextChar(wxKeyEvent& event)
 402 {
 403     if ( !HasFlag(wxSP_ARROW_KEYS) )
 404     {
 405         event.Skip();
 406         return;
 407     }
 408
 409     double value = m_value;
 410     switch ( event.GetKeyCode() )
 411     {
 412         case WXK_UP :
 413             value += m_increment;
 414             break;
 415
 416         case WXK_DOWN :
 417             value -= m_increment;
 418             break;
 419
 420         case WXK_PAGEUP :
 421             value += m_increment * 10.0;
 422             break;
 423
 424         case WXK_PAGEDOWN :
 425             value -= m_increment * 10.0;
 426             break;
 427
 428         default:
 429             event.Skip();
 430             return;
 431     }
 432
 433     value = AdjustToFitInRange(value);
 434
 435     SyncSpinToText();
 436
 437     if ( DoSetValue(value) )
 438         DoSendEvent();
 439 }
 440
 441 // ----------------------------------------------------------------------------
 442 // Textctrl functions
 443 // ----------------------------------------------------------------------------
 444
 445 bool wxSpinCtrlGenericBase::SyncSpinToText()
 446 {
 447     if ( !m_textCtrl || !m_textCtrl->IsModified() )
 448         return false;
 449
 450     double textValue;
 451     if ( m_textCtrl->GetValue().ToDouble(&textValue) )
 452     {
 453         if (textValue > m_max)
 454             textValue = m_max;
 455         else if (textValue < m_min)
 456             textValue = m_min;
 457     }
 458     else // text contents is not a valid number at all
 459     {
 460         // replace its contents with the last valid value
 461         textValue = m_value;
 462     }
 463
 464     // we must always set the value here, even if it's equal to m_value, as
 465     // otherwise we could be left with an out of range value when leaving the
 466     // text control and the current value is already m_max for example
 467     return DoSetValue(textValue);
 468 }
 469
 470 // ----------------------------------------------------------------------------
 471 // changing value and range
 472 // ----------------------------------------------------------------------------
 473
 474 void wxSpinCtrlGenericBase::SetValue(const wxString& text)
 475 {
 476     wxCHECK_RET( m_textCtrl, wxT("invalid call to wxSpinCtrl::SetValue") );
 477
 478     double val;
 479     if ( text.ToDouble(&val) && InRange(val) )
 480     {
 481         DoSetValue(val);
 482     }
 483     else // not a number at all or out of range
 484     {
 485         m_textCtrl->SetValue(text);
 486         m_textCtrl->SetSelection(0, -1);
 487         m_textCtrl->SetInsertionPointEnd();
 488     }
 489 }
 490
 491 bool wxSpinCtrlGenericBase::DoSetValue(double val)
 492 {
 493     wxCHECK_MSG( m_textCtrl, false, wxT("invalid call to wxSpinCtrl::SetValue") );
 494
 495     if (!InRange(val))
 496         return false;
 497
 498     if ( m_snap_to_ticks && (m_increment != 0) )
 499     {
 500         double snap_value = val / m_increment;
 501
 502         if (wxFinite(snap_value)) // FIXME what to do about a failure?
 503         {
 504             if ((snap_value - floor(snap_value)) < (ceil(snap_value) - snap_value))
 505                 val = floor(snap_value) * m_increment;
 506             else
 507                 val = ceil(snap_value) * m_increment;
 508         }
 509     }
 510
 511     wxString str(wxString::Format(m_format.c_str(), val));
 512
 513     if ((val != m_value) || (str != m_textCtrl->GetValue()))
 514     {
 515         m_value = val;
 516         str.ToDouble( &m_value );    // wysiwyg for textctrl
 517         m_textCtrl->SetValue( str );
 518         m_textCtrl->SetInsertionPointEnd();
 519         m_textCtrl->DiscardEdits();
 520         return true;
 521     }
 522
 523     return false;
 524 }
 525
 526 double wxSpinCtrlGenericBase::AdjustToFitInRange(double value) const
 527 {
 528     if (value < m_min)
 529         value = HasFlag(wxSP_WRAP) ? m_max : m_min;
 530     if (value > m_max)
 531         value = HasFlag(wxSP_WRAP) ? m_min : m_max;
 532
 533     return value;
 534 }
 535
 536 void wxSpinCtrlGenericBase::DoSetRange(double min, double max)
 537 {
 538     m_min = min;
 539     m_max = max;
 540 }
 541
 542 void wxSpinCtrlGenericBase::DoSetIncrement(double inc)
 543 {
 544     m_increment = inc;
 545 }
 546
 547 void wxSpinCtrlGenericBase::SetSnapToTicks(bool snap_to_ticks)
 548 {
 549     m_snap_to_ticks = snap_to_ticks;
 550     DoSetValue(m_value);
 551 }
 552
 553 void wxSpinCtrlGenericBase::SetSelection(long from, long to)
 554 {
 555     wxCHECK_RET( m_textCtrl, wxT("invalid call to wxSpinCtrl::SetSelection") );
 556
 557     m_textCtrl->SetSelection(from, to);
 558 }
 559
 560 #ifndef wxHAS_NATIVE_SPINCTRL
 561
 562 //-----------------------------------------------------------------------------
 563 // wxSpinCtrl
 564 //-----------------------------------------------------------------------------
 565
 566 void wxSpinCtrl::DoSendEvent()
 567 {
 568     wxSpinEvent event( wxEVT_COMMAND_SPINCTRL_UPDATED, GetId());
 569     event.SetEventObject( this );
 570     event.SetPosition((int)(m_value + 0.5)); // FIXME should be SetValue
 571     event.SetString(m_textCtrl->GetValue());
 572     GetEventHandler()->ProcessEvent( event );
 573 }
 574
 575 #endif // !wxHAS_NATIVE_SPINCTRL
 576
 577 //-----------------------------------------------------------------------------
 578 // wxSpinCtrlDouble
 579 //-----------------------------------------------------------------------------
 580
 581 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrlDouble, wxSpinCtrlGenericBase)
 582
 583 void wxSpinCtrlDouble::DoSendEvent()
 584 {
 585     wxSpinDoubleEvent event( wxEVT_COMMAND_SPINCTRLDOUBLE_UPDATED, GetId());
 586     event.SetEventObject( this );
 587     event.SetValue(m_value);
 588     event.SetString(m_textCtrl->GetValue());
 589     GetEventHandler()->ProcessEvent( event );
 590 }
 591
 592 void wxSpinCtrlDouble::SetDigits(unsigned digits)
 593 {
 594     wxCHECK_RET( digits <= 20, "too many digits for wxSpinCtrlDouble" );
 595
 596     if ( digits == m_digits )
 597         return;
 598
 599     m_digits = digits;
 600
 601     m_format.Printf(wxT("%%0.%ulf"), digits);
 602
 603     DoSetValue(m_value);
 604 }
 605
 606 #endif // wxUSE_SPINBTN
 607
 608 #endif // !wxPort-with-native-spinctrl
 609
 610 #endif // wxUSE_SPINCTRL