src/gtk1/spinctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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/utils.h"
  20     #include "wx/textctrl.h"    // for wxEVT_TEXT
  21     #include "wx/math.h"
  22     #include "wx/crt.h"
  23 #endif
  24
  25 #include "wx/gtk1/private.h"
  26
  27 //-----------------------------------------------------------------------------
  28 // idle system
  29 //-----------------------------------------------------------------------------
  30
  31 extern void wxapp_install_idle_handler();
  32 extern bool g_isIdle;
  33
  34 static const float sensitivity = 0.02;
  35
  36 //-----------------------------------------------------------------------------
  37 // data
  38 //-----------------------------------------------------------------------------
  39
  40 extern bool   g_blockEventsOnDrag;
  41
  42 //-----------------------------------------------------------------------------
  43 // "value_changed"
  44 //-----------------------------------------------------------------------------
  45
  46 extern "C" {
  47
  48 static gboolean
  49 wx_gtk_spin_input(GtkSpinButton* spin, gdouble* val, wxSpinCtrl* win)
  50 {
  51     // We might use g_ascii_strtoll() here but it's 2.12+ only, so use our own
  52     // wxString function even if this requires an extra conversion.
  53     const wxString
  54         text(wxString::FromUTF8(gtk_entry_get_text(GTK_ENTRY(spin))));
  55
  56     long lval;
  57     if ( !text.ToLong(&lval, win->GetBase()) )
  58         return FALSE;
  59
  60     *val = lval;
  61
  62     return TRUE;
  63 }
  64
  65 static gint
  66 wx_gtk_spin_output(GtkSpinButton* spin, wxSpinCtrl* win)
  67 {
  68     const gint val = gtk_spin_button_get_value_as_int(spin);
  69
  70     gtk_entry_set_text
  71     (
  72         GTK_ENTRY(spin),
  73         wxPrivate::wxSpinCtrlFormatAsHex(val, win->GetMax()).utf8_str()
  74     );
  75
  76     return TRUE;
  77 }
  78
  79 static void gtk_spinctrl_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  80 {
  81     if (g_isIdle) wxapp_install_idle_handler();
  82
  83     if (!win->m_hasVMT) return;
  84     if (g_blockEventsOnDrag) return;
  85
  86     wxCommandEvent event( wxEVT_SPINCTRL, win->GetId());
  87     event.SetEventObject( win );
  88
  89     // note that we don't use wxSpinCtrl::GetValue() here because it would
  90     // adjust the value to fit into the control range and this means that we
  91     // would never be able to enter an "invalid" value in the control, even
  92     // temporarily - and trying to enter 10 into the control which accepts the
  93     // values in range 5..50 is then, ummm, quite challenging (hint: you can't
  94     // enter 1!) (VZ)
  95     event.SetInt( (int)ceil(win->m_adjust->value) );
  96     win->HandleWindowEvent( event );
  97 }
  98 }
  99
 100 //-----------------------------------------------------------------------------
 101 //  "changed"
 102 //-----------------------------------------------------------------------------
 103
 104 extern "C" {
 105 static void
 106 gtk_spinctrl_text_changed_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
 107 {
 108     if (!win->m_hasVMT) return;
 109
 110     if (g_isIdle)
 111         wxapp_install_idle_handler();
 112
 113     wxCommandEvent event( wxEVT_TEXT, win->GetId() );
 114     event.SetEventObject( win );
 115
 116     // see above
 117     event.SetInt( (int)ceil(win->m_adjust->value) );
 118     win->HandleWindowEvent( event );
 119 }
 120 }
 121
 122 //-----------------------------------------------------------------------------
 123 // wxSpinCtrl
 124 //-----------------------------------------------------------------------------
 125
 126 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
 127     EVT_CHAR(wxSpinCtrl::OnChar)
 128 END_EVENT_TABLE()
 129
 130 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
 131                         const wxString& value,
 132                         const wxPoint& pos,  const wxSize& size,
 133                         long style,
 134                         int min, int max, int initial,
 135                         const wxString& name)
 136 {
 137     m_needParent = true;
 138     m_acceptsFocus = true;
 139
 140     if (!PreCreation( parent, pos, size ) ||
 141         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 142     {
 143         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 144         return false;
 145     }
 146
 147     m_oldPos = initial;
 148
 149     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 150
 151     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 152
 153     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 154                               (int)(m_windowStyle & wxSP_WRAP) );
 155
 156     GtkEnableEvents();
 157
 158     m_parent->DoAddChild( this );
 159
 160     PostCreation(size);
 161
 162     SetValue( value );
 163
 164     return true;
 165 }
 166
 167 void wxSpinCtrl::GtkDisableEvents()
 168 {
 169     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 170                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 171                         (gpointer) this );
 172
 173     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 174                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 175                         (gpointer) this );
 176 }
 177
 178 void wxSpinCtrl::GtkEnableEvents()
 179 {
 180     gtk_signal_connect( GTK_OBJECT (m_adjust),
 181                         "value_changed",
 182                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 183                         (gpointer) this );
 184
 185     gtk_signal_connect( GTK_OBJECT(m_widget),
 186                         "changed",
 187                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 188                         (gpointer)this);
 189 }
 190
 191 int wxSpinCtrl::GetMin() const
 192 {
 193     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 194
 195     return (int)ceil(m_adjust->lower);
 196 }
 197
 198 int wxSpinCtrl::GetMax() const
 199 {
 200     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 201
 202     return (int)ceil(m_adjust->upper);
 203 }
 204
 205 int wxSpinCtrl::GetValue() const
 206 {
 207     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 208
 209     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 210
 211     return (int)ceil(m_adjust->value);
 212 }
 213
 214 void wxSpinCtrl::SetValue( const wxString& value )
 215 {
 216     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 217
 218     int n;
 219     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 220     {
 221         // a number - set it
 222         SetValue(n);
 223     }
 224     else
 225     {
 226         // invalid number - set text as is (wxMSW compatible)
 227         GtkDisableEvents();
 228         gtk_entry_set_text( GTK_ENTRY(m_widget), wxGTK_CONV( value ) );
 229         GtkEnableEvents();
 230     }
 231 }
 232
 233 void wxSpinCtrl::SetValue( int value )
 234 {
 235     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 236
 237     float fpos = (float)value;
 238     m_oldPos = fpos;
 239     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 240
 241     m_adjust->value = fpos;
 242
 243     GtkDisableEvents();
 244     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 245     GtkEnableEvents();
 246 }
 247
 248 void wxSpinCtrl::SetSelection(long from, long to)
 249 {
 250     // translate from wxWidgets conventions to GTK+ ones: (-1, -1) means the
 251     // entire range
 252     if ( from == -1 && to == -1 )
 253     {
 254         from = 0;
 255         to = INT_MAX;
 256     }
 257
 258     gtk_editable_select_region( GTK_EDITABLE(m_widget), (gint)from, (gint)to );
 259 }
 260
 261 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 262 {
 263     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 264
 265     float fmin = (float)minVal;
 266     float fmax = (float)maxVal;
 267
 268     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 269         (fabs(fmax-m_adjust->upper) < sensitivity))
 270     {
 271         return;
 272     }
 273
 274     m_adjust->lower = fmin;
 275     m_adjust->upper = fmax;
 276
 277     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 278
 279     // these two calls are required due to some bug in GTK
 280     Refresh();
 281     SetFocus();
 282 }
 283
 284 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 285 {
 286     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 287
 288     if (event.GetKeyCode() == WXK_RETURN)
 289     {
 290         wxWindow *top_frame = m_parent;
 291         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 292             top_frame = top_frame->GetParent();
 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 = window->default_widget;
 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 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 324 {
 325     if (GTK_SPIN_BUTTON(m_widget)->entry.text_area == window) return true;
 326
 327     if (GTK_SPIN_BUTTON(m_widget)->panel == window) return true;
 328
 329     return false;
 330 }
 331
 332 wxSize wxSpinCtrl::DoGetBestSize() const
 333 {
 334     wxSize ret( wxControl::DoGetBestSize() );
 335     wxSize best(95, ret.y);
 336     CacheBestSize(best);
 337     return best;
 338 }
 339
 340 bool wxSpinCtrl::SetBase(int base)
 341 {
 342     // Currently we only support base 10 and 16. We could add support for base
 343     // 8 quite easily but wxMSW doesn't support it natively so don't bother
 344     // with doing something wxGTK-specific here.
 345     if ( base != 10 && base != 16 )
 346         return false;
 347
 348     if ( base == m_base )
 349         return true;
 350
 351     m_base = base;
 352
 353     // We need to be able to enter letters for any base greater than 10.
 354     gtk_spin_button_set_numeric( GTK_SPIN_BUTTON(m_widget), m_base <= 10 );
 355
 356     if ( m_base != 10 )
 357     {
 358         gtk_signal_connect( GTK_OBJECT(m_widget), "input",
 359                               GTK_SIGNAL_FUNC(wx_gtk_spin_input), this);
 360         gtk_signal_connect( GTK_OBJECT(m_widget), "output",
 361                               GTK_SIGNAL_FUNC(wx_gtk_spin_output), this);
 362     }
 363     else
 364     {
 365         gtk_signal_disconnect_by_func(GTK_OBJECT(m_widget),
 366                                              GTK_SIGNAL_FUNC(wx_gtk_spin_input),
 367                                              this);
 368         gtk_signal_disconnect_by_func(GTK_OBJECT(m_widget),
 369                                              GTK_SIGNAL_FUNC(wx_gtk_spin_output),
 370                                              this);
 371     }
 372
 373     return true;
 374 }
 375
 376 // static
 377 wxVisualAttributes
 378 wxSpinCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 379 {
 380     // TODO: overload to accept functions like gtk_spin_button_new?
 381     // Until then use a similar type
 382     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
 383 }
 384
 385 #endif
 386    // wxUSE_SPINCTRL