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_COMMAND_TEXT_UPDATED
  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 static void gtk_spinctrl_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  48 {
  49     if (g_isIdle) wxapp_install_idle_handler();
  50
  51     if (!win->m_hasVMT) return;
  52     if (g_blockEventsOnDrag) return;
  53
  54     wxCommandEvent event( wxEVT_COMMAND_SPINCTRL_UPDATED, win->GetId());
  55     event.SetEventObject( win );
  56
  57     // note that we don't use wxSpinCtrl::GetValue() here because it would
  58     // adjust the value to fit into the control range and this means that we
  59     // would never be able to enter an "invalid" value in the control, even
  60     // temporarily - and trying to enter 10 into the control which accepts the
  61     // values in range 5..50 is then, ummm, quite challenging (hint: you can't
  62     // enter 1!) (VZ)
  63     event.SetInt( (int)ceil(win->m_adjust->value) );
  64     win->HandleWindowEvent( event );
  65 }
  66 }
  67
  68 //-----------------------------------------------------------------------------
  69 //  "changed"
  70 //-----------------------------------------------------------------------------
  71
  72 extern "C" {
  73 static void
  74 gtk_spinctrl_text_changed_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  75 {
  76     if (!win->m_hasVMT) return;
  77
  78     if (g_isIdle)
  79         wxapp_install_idle_handler();
  80
  81     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
  82     event.SetEventObject( win );
  83
  84     // see above
  85     event.SetInt( (int)ceil(win->m_adjust->value) );
  86     win->HandleWindowEvent( event );
  87 }
  88 }
  89
  90 //-----------------------------------------------------------------------------
  91 // wxSpinCtrl
  92 //-----------------------------------------------------------------------------
  93
  94 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  95     EVT_CHAR(wxSpinCtrl::OnChar)
  96 END_EVENT_TABLE()
  97
  98 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  99                         const wxString& value,
 100                         const wxPoint& pos,  const wxSize& size,
 101                         long style,
 102                         int min, int max, int initial,
 103                         const wxString& name)
 104 {
 105     m_needParent = true;
 106     m_acceptsFocus = true;
 107
 108     if (!PreCreation( parent, pos, size ) ||
 109         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 110     {
 111         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 112         return false;
 113     }
 114
 115     m_oldPos = initial;
 116
 117     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 118
 119     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 120
 121     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 122                               (int)(m_windowStyle & wxSP_WRAP) );
 123
 124     GtkEnableEvents();
 125
 126     m_parent->DoAddChild( this );
 127
 128     PostCreation(size);
 129
 130     SetValue( value );
 131
 132     return true;
 133 }
 134
 135 void wxSpinCtrl::GtkDisableEvents()
 136 {
 137     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 138                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 139                         (gpointer) this );
 140
 141     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 142                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 143                         (gpointer) this );
 144 }
 145
 146 void wxSpinCtrl::GtkEnableEvents()
 147 {
 148     gtk_signal_connect( GTK_OBJECT (m_adjust),
 149                         "value_changed",
 150                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 151                         (gpointer) this );
 152
 153     gtk_signal_connect( GTK_OBJECT(m_widget),
 154                         "changed",
 155                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 156                         (gpointer)this);
 157 }
 158
 159 int wxSpinCtrl::GetMin() const
 160 {
 161     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 162
 163     return (int)ceil(m_adjust->lower);
 164 }
 165
 166 int wxSpinCtrl::GetMax() const
 167 {
 168     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 169
 170     return (int)ceil(m_adjust->upper);
 171 }
 172
 173 int wxSpinCtrl::GetValue() const
 174 {
 175     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 176
 177     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 178
 179     return (int)ceil(m_adjust->value);
 180 }
 181
 182 void wxSpinCtrl::SetValue( const wxString& value )
 183 {
 184     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 185
 186     int n;
 187     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 188     {
 189         // a number - set it
 190         SetValue(n);
 191     }
 192     else
 193     {
 194         // invalid number - set text as is (wxMSW compatible)
 195         GtkDisableEvents();
 196         gtk_entry_set_text( GTK_ENTRY(m_widget), wxGTK_CONV( value ) );
 197         GtkEnableEvents();
 198     }
 199 }
 200
 201 void wxSpinCtrl::SetValue( int value )
 202 {
 203     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 204
 205     float fpos = (float)value;
 206     m_oldPos = fpos;
 207     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 208
 209     m_adjust->value = fpos;
 210
 211     GtkDisableEvents();
 212     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 213     GtkEnableEvents();
 214 }
 215
 216 void wxSpinCtrl::SetSelection(long from, long to)
 217 {
 218     // translate from wxWidgets conventions to GTK+ ones: (-1, -1) means the
 219     // entire range
 220     if ( from == -1 && to == -1 )
 221     {
 222         from = 0;
 223         to = INT_MAX;
 224     }
 225
 226     gtk_editable_select_region( GTK_EDITABLE(m_widget), (gint)from, (gint)to );
 227 }
 228
 229 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 230 {
 231     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 232
 233     float fmin = (float)minVal;
 234     float fmax = (float)maxVal;
 235
 236     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 237         (fabs(fmax-m_adjust->upper) < sensitivity))
 238     {
 239         return;
 240     }
 241
 242     m_adjust->lower = fmin;
 243     m_adjust->upper = fmax;
 244
 245     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 246
 247     // these two calls are required due to some bug in GTK
 248     Refresh();
 249     SetFocus();
 250 }
 251
 252 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 253 {
 254     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 255
 256     if (event.GetKeyCode() == WXK_RETURN)
 257     {
 258         wxWindow *top_frame = m_parent;
 259         while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
 260             top_frame = top_frame->GetParent();
 261
 262         if ( GTK_IS_WINDOW(top_frame->m_widget) )
 263         {
 264             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 265             if ( window )
 266             {
 267                 GtkWidget *widgetDef = window->default_widget;
 268
 269                 if ( widgetDef )
 270                 {
 271                     gtk_widget_activate(widgetDef);
 272                     return;
 273                 }
 274             }
 275         }
 276     }
 277
 278     if ((event.GetKeyCode() == WXK_RETURN) && (m_windowStyle & wxTE_PROCESS_ENTER))
 279     {
 280         wxCommandEvent evt( wxEVT_COMMAND_TEXT_ENTER, m_windowId );
 281         evt.SetEventObject(this);
 282         GtkSpinButton *gsb = GTK_SPIN_BUTTON(m_widget);
 283         wxString val = wxGTK_CONV_BACK( gtk_entry_get_text( &gsb->entry ) );
 284         evt.SetString( val );
 285         if (HandleWindowEvent(evt)) return;
 286     }
 287
 288     event.Skip();
 289 }
 290
 291 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 292 {
 293     if (GTK_SPIN_BUTTON(m_widget)->entry.text_area == window) return true;
 294
 295     if (GTK_SPIN_BUTTON(m_widget)->panel == window) return true;
 296
 297     return false;
 298 }
 299
 300 wxSize wxSpinCtrl::DoGetBestSize() const
 301 {
 302     wxSize ret( wxControl::DoGetBestSize() );
 303     wxSize best(95, ret.y);
 304     CacheBestSize(best);
 305     return best;
 306 }
 307
 308 // static
 309 wxVisualAttributes
 310 wxSpinCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 311 {
 312     // TODO: overload to accept functions like gtk_spin_button_new?
 313     // Until then use a similar type
 314     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
 315 }
 316
 317 #endif
 318    // wxUSE_SPINCTRL