src/gtk/spinctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        spinbutt.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 #ifdef __GNUG__
  12 #pragma implementation "spinctrl.h"
  13 #endif
  14
  15 #include "wx/spinctrl.h"
  16
  17 #if wxUSE_SPINCTRL
  18
  19 #include "wx/utils.h"
  20
  21 #include <math.h>
  22
  23 #include <gdk/gdk.h>
  24 #include <gtk/gtk.h>
  25
  26 //-----------------------------------------------------------------------------
  27 // idle system
  28 //-----------------------------------------------------------------------------
  29
  30 extern void wxapp_install_idle_handler();
  31 extern bool g_isIdle;
  32
  33 static const float sensitivity = 0.02;
  34
  35 //-----------------------------------------------------------------------------
  36 // data
  37 //-----------------------------------------------------------------------------
  38
  39 extern bool   g_blockEventsOnDrag;
  40
  41 //-----------------------------------------------------------------------------
  42 // "value_changed"
  43 //-----------------------------------------------------------------------------
  44
  45 static void gtk_spinctrl_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  46 {
  47     if (g_isIdle) wxapp_install_idle_handler();
  48
  49     if (!win->m_hasVMT) return;
  50     if (g_blockEventsOnDrag) return;
  51
  52     wxCommandEvent event( wxEVT_COMMAND_SPINCTRL_UPDATED, win->GetId());
  53     event.SetEventObject( win );
  54
  55     // note that we don't use wxSpinCtrl::GetValue() here because it would
  56     // adjust the value to fit into the control range and this means that we
  57     // would never be able to enter an "invalid" value in the control, even
  58     // temporarily - and trying to enter 10 into the control which accepts the
  59     // values in range 5..50 is then, ummm, quite challenging (hint: you can't
  60     // enter 1!) (VZ)
  61     event.SetInt( (int)ceil(win->m_adjust->value) );
  62     win->GetEventHandler()->ProcessEvent( event );
  63 }
  64
  65 //-----------------------------------------------------------------------------
  66 //  "changed"
  67 //-----------------------------------------------------------------------------
  68
  69 static void
  70 gtk_spinctrl_text_changed_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  71 {
  72     if (!win->m_hasVMT) return;
  73
  74     if (g_isIdle)
  75         wxapp_install_idle_handler();
  76
  77     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
  78     event.SetEventObject( win );
  79     event.SetInt( win->GetValue() );
  80     win->GetEventHandler()->ProcessEvent( event );
  81 }
  82
  83 //-----------------------------------------------------------------------------
  84 // wxSpinCtrl
  85 //-----------------------------------------------------------------------------
  86
  87 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  88
  89 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  90     EVT_CHAR(wxSpinCtrl::OnChar)
  91 END_EVENT_TABLE()
  92
  93 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  94                         const wxString& value,
  95                         const wxPoint& pos,  const wxSize& size,
  96                         long style,
  97                         int min, int max, int initial,
  98                         const wxString& name)
  99 {
 100     m_needParent = TRUE;
 101     m_acceptsFocus = TRUE;
 102
 103     if (!PreCreation( parent, pos, size ) ||
 104         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 105     {
 106         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 107         return FALSE;
 108     }
 109
 110     m_oldPos = initial;
 111
 112     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 113
 114     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 115
 116     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 117                               (int)(m_windowStyle & wxSP_WRAP) );
 118
 119     GtkEnableEvents();
 120
 121     m_parent->DoAddChild( this );
 122
 123     PostCreation();
 124
 125     SetFont( parent->GetFont() );
 126
 127     wxSize size_best( DoGetBestSize() );
 128     wxSize new_size( size );
 129     if (new_size.x == -1)
 130         new_size.x = size_best.x;
 131     if (new_size.y == -1)
 132         new_size.y = size_best.y;
 133     if (new_size.y > size_best.y)
 134         new_size.y = size_best.y;
 135     if ((new_size.x != size.x) || (new_size.y != size.y))
 136         SetSize( new_size.x, new_size.y );
 137
 138     SetBackgroundColour( parent->GetBackgroundColour() );
 139
 140     SetValue( value );
 141
 142     Show( TRUE );
 143
 144     return TRUE;
 145 }
 146
 147 void wxSpinCtrl::GtkDisableEvents()
 148 {
 149     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 150                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 151                         (gpointer) this );
 152
 153     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 154                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 155                         (gpointer) this );
 156 }
 157
 158 void wxSpinCtrl::GtkEnableEvents()
 159 {
 160     gtk_signal_connect( GTK_OBJECT (m_adjust),
 161                         "value_changed",
 162                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 163                         (gpointer) this );
 164
 165     gtk_signal_connect( GTK_OBJECT(m_widget),
 166                         "changed",
 167                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 168                         (gpointer)this);
 169 }
 170
 171 int wxSpinCtrl::GetMin() const
 172 {
 173     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 174
 175     return (int)ceil(m_adjust->lower);
 176 }
 177
 178 int wxSpinCtrl::GetMax() const
 179 {
 180     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 181
 182     return (int)ceil(m_adjust->upper);
 183 }
 184
 185 int wxSpinCtrl::GetValue() const
 186 {
 187     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 188
 189     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 190
 191     return (int)ceil(m_adjust->value);
 192 }
 193
 194 void wxSpinCtrl::SetValue( const wxString& value )
 195 {
 196     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 197
 198     int n;
 199     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 200     {
 201         // a number - set it
 202         SetValue(n);
 203     }
 204     else
 205     {
 206         // invalid number - set text as is (wxMSW compatible)
 207         GtkDisableEvents();
 208         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 209         GtkEnableEvents();
 210     }
 211 }
 212
 213 void wxSpinCtrl::SetValue( int value )
 214 {
 215     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 216
 217     float fpos = (float)value;
 218     m_oldPos = fpos;
 219     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 220
 221     m_adjust->value = fpos;
 222
 223     GtkDisableEvents();
 224     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 225     GtkEnableEvents();
 226 }
 227
 228 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 229 {
 230     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 231
 232     float fmin = (float)minVal;
 233     float fmax = (float)maxVal;
 234
 235     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 236         (fabs(fmax-m_adjust->upper) < sensitivity))
 237     {
 238         return;
 239     }
 240
 241     m_adjust->lower = fmin;
 242     m_adjust->upper = fmax;
 243
 244     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 245
 246     // these two calls are required due to some bug in GTK
 247     Refresh();
 248     SetFocus();
 249 }
 250
 251 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 252 {
 253     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 254
 255     if (event.KeyCode() == WXK_RETURN)
 256     {
 257         wxWindow *top_frame = m_parent;
 258         while (top_frame->GetParent() && !(top_frame->GetParent()->IsTopLevel()))
 259             top_frame = top_frame->GetParent();
 260         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 261
 262         if (window->default_widget)
 263         {
 264             gtk_widget_activate (window->default_widget);
 265             return;
 266         }
 267     }
 268
 269     event.Skip();
 270 }
 271
 272 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 273 {
 274     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 275 }
 276
 277 void wxSpinCtrl::ApplyWidgetStyle()
 278 {
 279     SetWidgetStyle();
 280     gtk_widget_set_style( m_widget, m_widgetStyle );
 281 }
 282
 283 wxSize wxSpinCtrl::DoGetBestSize() const
 284 {
 285     wxSize ret( wxControl::DoGetBestSize() );
 286     return wxSize(95, ret.y);
 287 }
 288
 289 #endif
 290    // wxUSE_SPINCTRL