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
 163     m_spin_value    = 0;
 164
 165     m_textCtrl = NULL;
 166     m_spinButton  = NULL;
 167 }
 168
 169 bool wxSpinCtrlGenericBase::Create(wxWindow *parent,
 170                                    wxWindowID id,
 171                                    const wxString& value,
 172                                    const wxPoint& pos, const wxSize& size,
 173                                    long style,
 174                                    double min, double max, double initial,
 175                                    double increment,
 176                                    const wxString& name)
 177 {
 178     // don't use borders for this control itself, it wouldn't look good with
 179     // the text control borders (but we might want to use style border bits to
 180     // select the text control style)
 181     if ( !wxControl::Create(parent, id, wxDefaultPosition, wxDefaultSize,
 182                             (style & ~wxBORDER_MASK) | wxBORDER_NONE,
 183                             wxDefaultValidator, name) )
 184     {
 185         return false;
 186     }
 187
 188     m_value = initial;
 189     m_min   = min;
 190     m_max   = max;
 191     m_increment = increment;
 192
 193     m_textCtrl   = new wxSpinCtrlTextGeneric(this, value, style);
 194     m_spinButton = new wxSpinCtrlButtonGeneric(this, style);
 195 #if wxUSE_TOOLTIPS
 196     m_textCtrl->SetToolTip(GetToolTipText());
 197     m_spinButton->SetToolTip(GetToolTipText());
 198 #endif // wxUSE_TOOLTIPS
 199
 200     m_spin_value = m_spinButton->GetValue();
 201
 202     // the string value overrides the numeric one (for backwards compatibility
 203     // reasons and also because it is simpler to satisfy the string value which
 204     // comes much sooner in the list of arguments and leave the initial
 205     // parameter unspecified)
 206     if ( !value.empty() )
 207     {
 208         double d;
 209         if ( DoTextToValue(value, &d) )
 210         {
 211             m_value = d;
 212             m_textCtrl->SetValue(DoValueToText(m_value));
 213         }
 214     }
 215
 216     SetInitialSize(size);
 217     Move(pos);
 218
 219     // have to disable this window to avoid interfering it with message
 220     // processing to the text and the button... but pretend it is enabled to
 221     // make IsEnabled() return true
 222     wxControl::Enable(false); // don't use non virtual Disable() here!
 223     m_isEnabled = true;
 224
 225     // we don't even need to show this window itself - and not doing it avoids
 226     // that it overwrites the text control
 227     wxControl::Show(false);
 228     m_isShown = true;
 229     return true;
 230 }
 231
 232 wxSpinCtrlGenericBase::~wxSpinCtrlGenericBase()
 233 {
 234     // delete the controls now, don't leave them alive even though they would
 235     // still be eventually deleted by our parent - but it will be too late, the
 236     // user code expects them to be gone now
 237
 238     if (m_textCtrl)
 239     {
 240         // null this since MSW sends KILL_FOCUS on deletion, see ~wxSpinCtrlTextGeneric
 241         wxDynamicCast(m_textCtrl, wxSpinCtrlTextGeneric)->m_spin = NULL;
 242
 243         wxSpinCtrlTextGeneric *text = (wxSpinCtrlTextGeneric*)m_textCtrl;
 244         m_textCtrl = NULL;
 245         delete text;
 246     }
 247
 248     wxDELETE(m_spinButton);
 249 }
 250
 251 // ----------------------------------------------------------------------------
 252 // geometry
 253 // ----------------------------------------------------------------------------
 254
 255 wxSize wxSpinCtrlGenericBase::DoGetBestSize() const
 256 {
 257     wxSize sizeBtn  = m_spinButton->GetBestSize(),
 258            sizeText = m_textCtrl->GetBestSize();
 259
 260     return wxSize(sizeBtn.x + sizeText.x + MARGIN, sizeText.y);
 261 }
 262
 263 void wxSpinCtrlGenericBase::DoMoveWindow(int x, int y, int width, int height)
 264 {
 265     wxControl::DoMoveWindow(x, y, width, height);
 266
 267     // position the subcontrols inside the client area
 268     wxSize sizeBtn = m_spinButton->GetSize();
 269
 270     wxCoord wText = width - sizeBtn.x - MARGIN;
 271     m_textCtrl->SetSize(x, y, wText, height);
 272     m_spinButton->SetSize(x + wText + MARGIN, y, wxDefaultCoord, height);
 273 }
 274
 275 // ----------------------------------------------------------------------------
 276 // operations forwarded to the subcontrols
 277 // ----------------------------------------------------------------------------
 278
 279 void wxSpinCtrlGenericBase::SetFocus()
 280 {
 281     if ( m_textCtrl )
 282         m_textCtrl->SetFocus();
 283 }
 284
 285 #ifdef __WXMSW__
 286
 287 void wxSpinCtrlGenericBase::DoEnable(bool enable)
 288 {
 289     // We never enable this control itself, it must stay disabled to avoid
 290     // interfering with the siblings event handling (see e.g. #12045 for the
 291     // kind of problems which arise otherwise).
 292     if ( !enable )
 293         wxSpinCtrlBase::DoEnable(enable);
 294 }
 295
 296 #endif // __WXMSW__
 297
 298 bool wxSpinCtrlGenericBase::Enable(bool enable)
 299 {
 300     if ( !wxSpinCtrlBase::Enable(enable) )
 301         return false;
 302
 303     m_spinButton->Enable(enable);
 304     m_textCtrl->Enable(enable);
 305
 306     return true;
 307 }
 308
 309 bool wxSpinCtrlGenericBase::Show(bool show)
 310 {
 311     if ( !wxControl::Show(show) )
 312         return false;
 313
 314     // under GTK Show() is called the first time before we are fully
 315     // constructed
 316     if ( m_spinButton )
 317     {
 318         m_spinButton->Show(show);
 319         m_textCtrl->Show(show);
 320     }
 321
 322     return true;
 323 }
 324
 325 #if wxUSE_TOOLTIPS
 326 void wxSpinCtrlGenericBase::DoSetToolTip(wxToolTip *tip)
 327 {
 328     // Notice that we must check for the subcontrols not being NULL (as they
 329     // could be if we were created with the default ctor and this is called
 330     // before Create() for some reason) and that we can't call SetToolTip(tip)
 331     // because this would take ownership of the wxToolTip object (twice).
 332     if ( m_textCtrl )
 333     {
 334         if ( tip )
 335             m_textCtrl->SetToolTip(tip->GetTip());
 336         else
 337             m_textCtrl->SetToolTip(NULL);
 338     }
 339
 340     if ( m_spinButton )
 341     {
 342         if( tip )
 343             m_spinButton->SetToolTip(tip->GetTip());
 344         else
 345             m_spinButton->SetToolTip(NULL);
 346     }
 347
 348     wxWindowBase::DoSetToolTip(tip);
 349 }
 350 #endif // wxUSE_TOOLTIPS
 351
 352 // ----------------------------------------------------------------------------
 353 // Handle sub controls events
 354 // ----------------------------------------------------------------------------
 355
 356 BEGIN_EVENT_TABLE(wxSpinCtrlGenericBase, wxSpinCtrlBase)
 357     EVT_CHAR(wxSpinCtrlGenericBase::OnTextChar)
 358     EVT_KILL_FOCUS(wxSpinCtrlGenericBase::OnTextLostFocus)
 359 END_EVENT_TABLE()
 360
 361 void wxSpinCtrlGenericBase::OnSpinButton(wxSpinEvent& event)
 362 {
 363     event.Skip();
 364
 365     // Sync the textctrl since the user expects that the button will modify
 366     // what they see in the textctrl.
 367     SyncSpinToText();
 368
 369     int spin_value = event.GetPosition();
 370     double step = (event.GetEventType() == wxEVT_SCROLL_LINEUP) ? 1 : -1;
 371
 372     // Use the spinbutton's acceleration, if any, but not if wrapping around
 373     if (((spin_value >= 0) && (m_spin_value >= 0)) || ((spin_value <= 0) && (m_spin_value <= 0)))
 374         step *= abs(spin_value - m_spin_value);
 375
 376     double value = AdjustToFitInRange(m_value + step*m_increment);
 377
 378     // Ignore the edges when it wraps since the up/down event may be opposite
 379     // They are in GTK and Mac
 380     if (abs(spin_value - m_spin_value) > SPINCTRLBUT_MAX)
 381     {
 382         m_spin_value = spin_value;
 383         return;
 384     }
 385
 386     m_spin_value = spin_value;
 387
 388     if ( DoSetValue(value) )
 389         DoSendEvent();
 390 }
 391
 392 void wxSpinCtrlGenericBase::OnTextLostFocus(wxFocusEvent& event)
 393 {
 394     SyncSpinToText();
 395     DoSendEvent();
 396
 397     event.Skip();
 398 }
 399
 400 void wxSpinCtrlGenericBase::OnTextChar(wxKeyEvent& event)
 401 {
 402     if ( !HasFlag(wxSP_ARROW_KEYS) )
 403     {
 404         event.Skip();
 405         return;
 406     }
 407
 408     double value = m_value;
 409     switch ( event.GetKeyCode() )
 410     {
 411         case WXK_UP :
 412             value += m_increment;
 413             break;
 414
 415         case WXK_DOWN :
 416             value -= m_increment;
 417             break;
 418
 419         case WXK_PAGEUP :
 420             value += m_increment * 10.0;
 421             break;
 422
 423         case WXK_PAGEDOWN :
 424             value -= m_increment * 10.0;
 425             break;
 426
 427         default:
 428             event.Skip();
 429             return;
 430     }
 431
 432     value = AdjustToFitInRange(value);
 433
 434     SyncSpinToText();
 435
 436     if ( DoSetValue(value) )
 437         DoSendEvent();
 438 }
 439
 440 // ----------------------------------------------------------------------------
 441 // Textctrl functions
 442 // ----------------------------------------------------------------------------
 443
 444 bool wxSpinCtrlGenericBase::SyncSpinToText()
 445 {
 446     if ( !m_textCtrl || !m_textCtrl->IsModified() )
 447         return false;
 448
 449     double textValue;
 450     if ( DoTextToValue(m_textCtrl->GetValue(), &textValue) )
 451     {
 452         if (textValue > m_max)
 453             textValue = m_max;
 454         else if (textValue < m_min)
 455             textValue = m_min;
 456     }
 457     else // text contents is not a valid number at all
 458     {
 459         // replace its contents with the last valid value
 460         textValue = m_value;
 461     }
 462
 463     // we must always set the value here, even if it's equal to m_value, as
 464     // otherwise we could be left with an out of range value when leaving the
 465     // text control and the current value is already m_max for example
 466     return DoSetValue(textValue);
 467 }
 468
 469 // ----------------------------------------------------------------------------
 470 // changing value and range
 471 // ----------------------------------------------------------------------------
 472
 473 void wxSpinCtrlGenericBase::SetValue(const wxString& text)
 474 {
 475     wxCHECK_RET( m_textCtrl, wxT("invalid call to wxSpinCtrl::SetValue") );
 476
 477     double val;
 478     if ( DoTextToValue(text, &val) && InRange(val) )
 479     {
 480         DoSetValue(val);
 481     }
 482     else // not a number at all or out of range
 483     {
 484         m_textCtrl->SetValue(text);
 485         m_textCtrl->SetSelection(0, -1);
 486         m_textCtrl->SetInsertionPointEnd();
 487     }
 488 }
 489
 490 bool wxSpinCtrlGenericBase::DoSetValue(double val)
 491 {
 492     wxCHECK_MSG( m_textCtrl, false, wxT("invalid call to wxSpinCtrl::SetValue") );
 493
 494     if (!InRange(val))
 495         return false;
 496
 497     if ( m_snap_to_ticks && (m_increment != 0) )
 498     {
 499         double snap_value = val / m_increment;
 500
 501         if (wxFinite(snap_value)) // FIXME what to do about a failure?
 502         {
 503             if ((snap_value - floor(snap_value)) < (ceil(snap_value) - snap_value))
 504                 val = floor(snap_value) * m_increment;
 505             else
 506                 val = ceil(snap_value) * m_increment;
 507         }
 508     }
 509
 510     wxString str(DoValueToText(val));
 511
 512     if ((val != m_value) || (str != m_textCtrl->GetValue()))
 513     {
 514         if ( !DoTextToValue(str, &m_value ) )    // wysiwyg for textctrl
 515             m_value = val;
 516         m_textCtrl->SetValue( str );
 517         m_textCtrl->SetInsertionPointEnd();
 518         m_textCtrl->DiscardEdits();
 519         return true;
 520     }
 521
 522     return false;
 523 }
 524
 525 double wxSpinCtrlGenericBase::AdjustToFitInRange(double value) const
 526 {
 527     if (value < m_min)
 528         value = HasFlag(wxSP_WRAP) ? m_max : m_min;
 529     if (value > m_max)
 530         value = HasFlag(wxSP_WRAP) ? m_min : m_max;
 531
 532     return value;
 533 }
 534
 535 void wxSpinCtrlGenericBase::DoSetRange(double min, double max)
 536 {
 537     m_min = min;
 538     m_max = max;
 539 }
 540
 541 void wxSpinCtrlGenericBase::DoSetIncrement(double inc)
 542 {
 543     m_increment = inc;
 544 }
 545
 546 void wxSpinCtrlGenericBase::SetSnapToTicks(bool snap_to_ticks)
 547 {
 548     m_snap_to_ticks = snap_to_ticks;
 549     DoSetValue(m_value);
 550 }
 551
 552 void wxSpinCtrlGenericBase::SetSelection(long from, long to)
 553 {
 554     wxCHECK_RET( m_textCtrl, wxT("invalid call to wxSpinCtrl::SetSelection") );
 555
 556     m_textCtrl->SetSelection(from, to);
 557 }
 558
 559 #ifndef wxHAS_NATIVE_SPINCTRL
 560
 561 //-----------------------------------------------------------------------------
 562 // wxSpinCtrl
 563 //-----------------------------------------------------------------------------
 564
 565 void wxSpinCtrl::DoSendEvent()
 566 {
 567     wxSpinEvent event( wxEVT_COMMAND_SPINCTRL_UPDATED, GetId());
 568     event.SetEventObject( this );
 569     event.SetPosition((int)(m_value + 0.5)); // FIXME should be SetValue
 570     event.SetString(m_textCtrl->GetValue());
 571     GetEventHandler()->ProcessEvent( event );
 572 }
 573
 574 bool wxSpinCtrl::DoTextToValue(const wxString& text, double *val)
 575 {
 576     long lval;
 577     if ( !text.ToLong(&lval) )
 578         return false;
 579
 580     *val = static_cast<double>(lval);
 581
 582     return true;
 583 }
 584
 585 wxString wxSpinCtrl::DoValueToText(double val)
 586 {
 587     return wxString::Format("%ld", static_cast<long>(val));
 588 }
 589
 590 #endif // !wxHAS_NATIVE_SPINCTRL
 591
 592 //-----------------------------------------------------------------------------
 593 // wxSpinCtrlDouble
 594 //-----------------------------------------------------------------------------
 595
 596 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrlDouble, wxSpinCtrlGenericBase)
 597
 598 void wxSpinCtrlDouble::DoSendEvent()
 599 {
 600     wxSpinDoubleEvent event( wxEVT_COMMAND_SPINCTRLDOUBLE_UPDATED, GetId());
 601     event.SetEventObject( this );
 602     event.SetValue(m_value);
 603     event.SetString(m_textCtrl->GetValue());
 604     GetEventHandler()->ProcessEvent( event );
 605 }
 606
 607 bool wxSpinCtrlDouble::DoTextToValue(const wxString& text, double *val)
 608 {
 609     return text.ToDouble(val);
 610 }
 611
 612 wxString wxSpinCtrlDouble::DoValueToText(double val)
 613 {
 614     return wxString::Format(m_format, val);
 615 }
 616
 617 void wxSpinCtrlDouble::SetDigits(unsigned digits)
 618 {
 619     wxCHECK_RET( digits <= 20, "too many digits for wxSpinCtrlDouble" );
 620
 621     if ( digits == m_digits )
 622         return;
 623
 624     m_digits = digits;
 625
 626     m_format.Printf(wxT("%%0.%ulf"), digits);
 627
 628     DoSetValue(m_value);
 629 }
 630
 631 #endif // wxUSE_SPINBTN
 632
 633 #endif // !wxPort-with-native-spinctrl
 634
 635 #endif // wxUSE_SPINCTRL