src/gtk/spinctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/spinctrl.cpp
   3 // Purpose:     wxSpinCtrl
   4 // Author:      Robert
   5 // Modified by:
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_SPINCTRL
  15
  16 #include "wx/spinctrl.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/textctrl.h"    // for wxEVT_TEXT
  20     #include "wx/utils.h"
  21     #include "wx/wxcrtvararg.h"
  22 #endif
  23
  24 #include <gtk/gtk.h>
  25 #include "wx/gtk/private.h"
  26 #include "wx/gtk/private/gtk2-compat.h"
  27
  28 //-----------------------------------------------------------------------------
  29 // data
  30 //-----------------------------------------------------------------------------
  31
  32 extern bool   g_blockEventsOnDrag;
  33
  34 //-----------------------------------------------------------------------------
  35 // "value_changed"
  36 //-----------------------------------------------------------------------------
  37
  38 extern "C" {
  39 static void
  40 gtk_value_changed(GtkSpinButton* spinbutton, wxSpinCtrlGTKBase* win)
  41 {
  42     if (g_blockEventsOnDrag)
  43         return;
  44
  45     if (wxIsKindOf(win, wxSpinCtrl))
  46     {
  47         wxSpinEvent event(wxEVT_SPINCTRL, win->GetId());
  48         event.SetEventObject( win );
  49         event.SetPosition(static_cast<wxSpinCtrl*>(win)->GetValue());
  50         event.SetString(gtk_entry_get_text(GTK_ENTRY(spinbutton)));
  51         win->HandleWindowEvent( event );
  52     }
  53     else // wxIsKindOf(win, wxSpinCtrlDouble)
  54     {
  55         wxSpinDoubleEvent event( wxEVT_SPINCTRLDOUBLE, win->GetId());
  56         event.SetEventObject( win );
  57         event.SetValue(static_cast<wxSpinCtrlDouble*>(win)->GetValue());
  58         event.SetString(gtk_entry_get_text(GTK_ENTRY(spinbutton)));
  59         win->HandleWindowEvent( event );
  60     }
  61 }
  62 }
  63
  64 //-----------------------------------------------------------------------------
  65 //  "changed"
  66 //-----------------------------------------------------------------------------
  67
  68 extern "C" {
  69 static void
  70 gtk_changed(GtkSpinButton* spinbutton, wxSpinCtrl* win)
  71 {
  72     wxCommandEvent event( wxEVT_TEXT, win->GetId() );
  73     event.SetEventObject( win );
  74     event.SetString(gtk_entry_get_text(GTK_ENTRY(spinbutton)));
  75     event.SetInt(win->GetValue());
  76     win->HandleWindowEvent( event );
  77 }
  78 }
  79
  80 //-----------------------------------------------------------------------------
  81 // wxSpinCtrlGTKBase
  82 //-----------------------------------------------------------------------------
  83
  84 BEGIN_EVENT_TABLE(wxSpinCtrlGTKBase, wxSpinCtrlBase)
  85     EVT_CHAR(wxSpinCtrlGTKBase::OnChar)
  86 END_EVENT_TABLE()
  87
  88 bool wxSpinCtrlGTKBase::Create(wxWindow *parent, wxWindowID id,
  89                         const wxString& value,
  90                         const wxPoint& pos,  const wxSize& size,
  91                         long style,
  92                         double min, double max, double initial, double inc,
  93                         const wxString& name)
  94 {
  95     if (!PreCreation( parent, pos, size ) ||
  96         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
  97     {
  98         wxFAIL_MSG( wxT("wxSpinCtrlGTKBase creation failed") );
  99         return false;
 100     }
 101
 102     m_widget = gtk_spin_button_new_with_range(min, max, inc);
 103     g_object_ref(m_widget);
 104
 105     gtk_spin_button_set_value( GTK_SPIN_BUTTON(m_widget), initial);
 106
 107     gfloat align;
 108     if ( HasFlag(wxALIGN_RIGHT) )
 109         align = 1.0;
 110     else if ( HasFlag(wxALIGN_CENTRE) )
 111         align = 0.5;
 112     else
 113         align = 0.0;
 114
 115     gtk_entry_set_alignment(GTK_ENTRY(m_widget), align);
 116
 117     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 118                               (int)(m_windowStyle & wxSP_WRAP) );
 119
 120     g_signal_connect_after(m_widget, "value_changed", G_CALLBACK(gtk_value_changed), this);
 121     g_signal_connect_after(m_widget, "changed", G_CALLBACK(gtk_changed), this);
 122
 123     m_parent->DoAddChild( this );
 124
 125     PostCreation(size);
 126
 127     if (!value.empty())
 128     {
 129         SetValue(value);
 130     }
 131
 132     return true;
 133 }
 134
 135 double wxSpinCtrlGTKBase::DoGetValue() const
 136 {
 137     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 138
 139     // Get value directly from current control text, just as
 140     // gtk_spin_button_update() would do. Calling gtk_spin_button_update() causes
 141     // a redraw, which causes an idle event, so if GetValue() is called from
 142     // a UI update handler, you get a never ending sequence of idle events. It
 143     // also forces the text into valid range, which wxMSW GetValue() does not do.
 144     static unsigned sig_id;
 145     if (sig_id == 0)
 146         sig_id = g_signal_lookup("input", GTK_TYPE_SPIN_BUTTON);
 147     double value;
 148     int handled = 0;
 149     g_signal_emit(m_widget, sig_id, 0, &value, &handled);
 150     if (!handled)
 151         value = g_strtod(gtk_entry_get_text(GTK_ENTRY(m_widget)), NULL);
 152     GtkAdjustment* adj =
 153         gtk_spin_button_get_adjustment(GTK_SPIN_BUTTON(m_widget));
 154     const double lower = gtk_adjustment_get_lower(adj);
 155     const double upper = gtk_adjustment_get_upper(adj);
 156     if (value < lower)
 157         value = lower;
 158     else if (value > upper)
 159         value = upper;
 160
 161     return value;
 162 }
 163
 164 double wxSpinCtrlGTKBase::DoGetMin() const
 165 {
 166     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 167
 168     double min = 0;
 169     gtk_spin_button_get_range( GTK_SPIN_BUTTON(m_widget), &min, NULL);
 170     return min;
 171 }
 172
 173 double wxSpinCtrlGTKBase::DoGetMax() const
 174 {
 175     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 176
 177     double max = 0;
 178     gtk_spin_button_get_range( GTK_SPIN_BUTTON(m_widget), NULL, &max);
 179     return max;
 180 }
 181
 182 double wxSpinCtrlGTKBase::DoGetIncrement() const
 183 {
 184     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 185
 186     double inc = 0;
 187     gtk_spin_button_get_increments( GTK_SPIN_BUTTON(m_widget), &inc, NULL);
 188     return inc;
 189 }
 190
 191 bool wxSpinCtrlGTKBase::GetSnapToTicks() const
 192 {
 193     wxCHECK_MSG(m_widget, false, "invalid spin button");
 194
 195     return gtk_spin_button_get_snap_to_ticks( GTK_SPIN_BUTTON(m_widget) ) != 0;
 196 }
 197
 198 void wxSpinCtrlGTKBase::SetValue( const wxString& value )
 199 {
 200     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 201
 202     double n;
 203     if ( wxSscanf(value, "%lg", &n) == 1 )
 204     {
 205         // a number - set it, let DoSetValue round for int value
 206         DoSetValue(n);
 207         return;
 208     }
 209
 210     // invalid number - set text as is (wxMSW compatible)
 211     GtkDisableEvents();
 212     gtk_entry_set_text( GTK_ENTRY(m_widget), wxGTK_CONV( value ) );
 213     GtkEnableEvents();
 214 }
 215
 216 void wxSpinCtrlGTKBase::DoSetValue( double value )
 217 {
 218     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 219
 220     GtkDisableEvents();
 221     gtk_spin_button_set_value( GTK_SPIN_BUTTON(m_widget), value);
 222     GtkEnableEvents();
 223 }
 224
 225 void wxSpinCtrlGTKBase::SetSnapToTicks(bool snap_to_ticks)
 226 {
 227     wxCHECK_RET( (m_widget != NULL), "invalid spin button" );
 228
 229     gtk_spin_button_set_snap_to_ticks( GTK_SPIN_BUTTON(m_widget), snap_to_ticks);
 230 }
 231
 232 void wxSpinCtrlGTKBase::SetSelection(long from, long to)
 233 {
 234     // translate from wxWidgets conventions to GTK+ ones: (-1, -1) means the
 235     // entire range
 236     if ( from == -1 && to == -1 )
 237     {
 238         from = 0;
 239         to = INT_MAX;
 240     }
 241
 242     gtk_editable_select_region( GTK_EDITABLE(m_widget), (gint)from, (gint)to );
 243 }
 244
 245 void wxSpinCtrlGTKBase::DoSetRange(double minVal, double maxVal)
 246 {
 247     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 248
 249     GtkDisableEvents();
 250     gtk_spin_button_set_range( GTK_SPIN_BUTTON(m_widget), minVal, maxVal);
 251     GtkEnableEvents();
 252 }
 253
 254 void wxSpinCtrlGTKBase::DoSetIncrement(double inc)
 255 {
 256     wxCHECK_RET( m_widget, "invalid spin button" );
 257
 258     GtkDisableEvents();
 259
 260     // Preserve the old page value when changing just the increment.
 261     double page = 10*inc;
 262     gtk_spin_button_get_increments( GTK_SPIN_BUTTON(m_widget), NULL, &page);
 263
 264     gtk_spin_button_set_increments( GTK_SPIN_BUTTON(m_widget), inc, page);
 265     GtkEnableEvents();
 266 }
 267
 268 void wxSpinCtrlGTKBase::GtkDisableEvents() const
 269 {
 270     g_signal_handlers_block_by_func( m_widget,
 271         (gpointer)gtk_value_changed, (void*) this);
 272
 273     g_signal_handlers_block_by_func(m_widget,
 274         (gpointer)gtk_changed, (void*) this);
 275 }
 276
 277 void wxSpinCtrlGTKBase::GtkEnableEvents() const
 278 {
 279     g_signal_handlers_unblock_by_func(m_widget,
 280         (gpointer)gtk_value_changed, (void*) this);
 281
 282     g_signal_handlers_unblock_by_func(m_widget,
 283         (gpointer)gtk_changed, (void*) this);
 284 }
 285
 286 void wxSpinCtrlGTKBase::OnChar( wxKeyEvent &event )
 287 {
 288     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 289
 290     if (event.GetKeyCode() == WXK_RETURN)
 291     {
 292         wxWindow *top_frame = wxGetTopLevelParent(m_parent);
 293
 294         if ( GTK_IS_WINDOW(top_frame->m_widget) )
 295         {
 296             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 297             if ( window )
 298             {
 299                 GtkWidget* widgetDef = gtk_window_get_default_widget(window);
 300
 301                 if ( widgetDef )
 302                 {
 303                     gtk_widget_activate(widgetDef);
 304                     return;
 305                 }
 306             }
 307         }
 308     }
 309
 310     if ((event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 311     {
 312         wxCommandEvent evt( wxEVT_TEXT_ENTER, m_windowId );
 313         evt.SetEventObject(this);
 314         GtkSpinButton *gsb = GTK_SPIN_BUTTON(m_widget);
 315         wxString val = wxGTK_CONV_BACK( gtk_entry_get_text( &gsb->entry ) );
 316         evt.SetString( val );
 317         if (HandleWindowEvent(evt)) return;
 318     }
 319
 320     event.Skip();
 321 }
 322
 323 GdkWindow *wxSpinCtrlGTKBase::GTKGetWindow(wxArrayGdkWindows& windows) const
 324 {
 325 #ifdef __WXGTK3__
 326     // no access to internal GdkWindows
 327     wxUnusedVar(windows);
 328 #else
 329     GtkSpinButton* spinbutton = GTK_SPIN_BUTTON(m_widget);
 330
 331     windows.push_back(spinbutton->entry.text_area);
 332     windows.push_back(spinbutton->panel);
 333 #endif
 334
 335     return NULL;
 336 }
 337
 338 wxSize wxSpinCtrlGTKBase::DoGetBestSize() const
 339 {
 340     return DoGetSizeFromTextSize(95); // TODO: 95 is completely arbitrary
 341 }
 342
 343 wxSize wxSpinCtrlGTKBase::DoGetSizeFromTextSize(int xlen, int ylen) const
 344 {
 345     wxASSERT_MSG( m_widget, wxS("GetSizeFromTextSize called before creation") );
 346
 347     // Set an as small as possible size for the control, so preferred sizes
 348     // return "natural" sizes, not taking into account the previous ones (which
 349     // seems to be GTK+3 behaviour)
 350     gtk_widget_set_size_request(m_widget, 0, 0);
 351
 352     // Both Gtk+2 and Gtk+3 use current value/range to measure control's width.
 353     // So, we can't ask Gtk+ for its width. Instead, we used hardcoded values.
 354
 355     // Returned height is OK
 356     wxSize totalS = GTKGetPreferredSize(m_widget);
 357
 358 #if GTK_CHECK_VERSION(3,4,0)
 359     // two buttons in horizontal
 360     totalS.x = 46 + 15; // margins included
 361 #else
 362     // two small buttons in vertical
 363     totalS.x = GetFont().GetPixelSize().y + 13; // margins included
 364 #endif
 365
 366     wxSize tsize(xlen + totalS.x, totalS.y);
 367
 368     // Check if the user requested a non-standard height.
 369     if ( ylen > 0 )
 370         tsize.IncBy(0, ylen - GetCharHeight());
 371
 372     return tsize;
 373 }
 374
 375 // static
 376 wxVisualAttributes
 377 wxSpinCtrlGTKBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 378 {
 379     return GetDefaultAttributesFromGTKWidget(gtk_spin_button_new_with_range(0, 100, 1), true);
 380 }
 381
 382 //-----------------------------------------------------------------------------
 383 // wxSpinCtrl
 384 //-----------------------------------------------------------------------------
 385
 386 extern "C"
 387 {
 388
 389 static gboolean
 390 wx_gtk_spin_input(GtkSpinButton* spin, gdouble* val, wxSpinCtrl* win)
 391 {
 392     // We might use g_ascii_strtoll() here but it's 2.12+ only, so use our own
 393     // wxString function even if this requires an extra conversion.
 394     const wxString
 395         text(wxString::FromUTF8(gtk_entry_get_text(GTK_ENTRY(spin))));
 396
 397     long lval;
 398     if ( !text.ToLong(&lval, win->GetBase()) )
 399         return FALSE;
 400
 401     *val = lval;
 402
 403     return TRUE;
 404 }
 405
 406 static gint
 407 wx_gtk_spin_output(GtkSpinButton* spin, wxSpinCtrl* win)
 408 {
 409     const gint val = gtk_spin_button_get_value_as_int(spin);
 410
 411     gtk_entry_set_text
 412     (
 413         GTK_ENTRY(spin),
 414         wxPrivate::wxSpinCtrlFormatAsHex(val, win->GetMax()).utf8_str()
 415     );
 416
 417     return TRUE;
 418 }
 419
 420 } // extern "C"
 421
 422 bool wxSpinCtrl::SetBase(int base)
 423 {
 424     // Currently we only support base 10 and 16. We could add support for base
 425     // 8 quite easily but wxMSW doesn't support it natively so don't bother
 426     // with doing something wxGTK-specific here.
 427     if ( base != 10 && base != 16 )
 428         return false;
 429
 430     if ( base == m_base )
 431         return true;
 432
 433     m_base = base;
 434
 435     // We need to be able to enter letters for any base greater than 10.
 436     gtk_spin_button_set_numeric( GTK_SPIN_BUTTON(m_widget), m_base <= 10 );
 437
 438     if ( m_base != 10 )
 439     {
 440         g_signal_connect( m_widget, "input",
 441                               G_CALLBACK(wx_gtk_spin_input), this);
 442         g_signal_connect( m_widget, "output",
 443                               G_CALLBACK(wx_gtk_spin_output), this);
 444     }
 445     else
 446     {
 447         g_signal_handlers_disconnect_by_func(m_widget,
 448                                              (gpointer)wx_gtk_spin_input,
 449                                              this);
 450         g_signal_handlers_disconnect_by_func(m_widget,
 451                                              (gpointer)wx_gtk_spin_output,
 452                                              this);
 453     }
 454
 455     return true;
 456 }
 457
 458 //-----------------------------------------------------------------------------
 459 // wxSpinCtrlDouble
 460 //-----------------------------------------------------------------------------
 461
 462 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrlDouble, wxSpinCtrlGTKBase)
 463
 464 unsigned wxSpinCtrlDouble::GetDigits() const
 465 {
 466     wxCHECK_MSG( m_widget, 0, "invalid spin button" );
 467
 468     return gtk_spin_button_get_digits( GTK_SPIN_BUTTON(m_widget) );
 469 }
 470
 471 void wxSpinCtrlDouble::SetDigits(unsigned digits)
 472 {
 473     wxCHECK_RET( m_widget, "invalid spin button" );
 474
 475     gtk_spin_button_set_digits( GTK_SPIN_BUTTON(m_widget), digits);
 476 }
 477
 478 #endif // wxUSE_SPINCTRL