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     event.SetInt( win->GetValue() );
  55     win->GetEventHandler()->ProcessEvent( event );
  56 }
  57
  58 //-----------------------------------------------------------------------------
  59 // wxSpinCtrl
  60 //-----------------------------------------------------------------------------
  61
  62 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  63
  64 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  65     EVT_CHAR(wxSpinCtrl::OnChar)
  66 END_EVENT_TABLE()
  67
  68 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  69                         const wxString& value,
  70                         const wxPoint& pos,  const wxSize& size,
  71                         long style,
  72                         int min, int max, int initial,
  73                         const wxString& name)
  74 {
  75     m_needParent = TRUE;
  76     m_acceptsFocus = TRUE;
  77
  78     if (!PreCreation( parent, pos, size ) ||
  79         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
  80     {
  81         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
  82         return FALSE;
  83     }
  84
  85     m_oldPos = initial;
  86
  87     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
  88
  89     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
  90
  91     wxSize new_size = size,
  92            sizeBest = DoGetBestSize();
  93     if (new_size.x == -1)
  94         new_size.x = sizeBest.x;
  95     if (new_size.y == -1)
  96         new_size.y = sizeBest.y;
  97
  98     if ((new_size.x != size.x) || (new_size.y != size.y))
  99         SetSize( new_size.x, new_size.y );
 100
 101     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 102                               (int)(m_windowStyle & wxSP_WRAP) );
 103
 104     GtkEnableEvents();
 105     m_parent->DoAddChild( this );
 106
 107     PostCreation();
 108
 109     SetBackgroundColour( parent->GetBackgroundColour() );
 110
 111     SetValue( value );
 112
 113     Show( TRUE );
 114
 115     return TRUE;
 116 }
 117
 118 void wxSpinCtrl::GtkDisableEvents()
 119 {
 120     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 121                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 122                         (gpointer) this );
 123
 124 }
 125
 126 void wxSpinCtrl::GtkEnableEvents()
 127 {
 128     gtk_signal_connect( GTK_OBJECT (m_adjust),
 129                         "value_changed",
 130                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 131                         (gpointer) this );
 132 }
 133
 134 int wxSpinCtrl::GetMin() const
 135 {
 136     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 137
 138     return (int)ceil(m_adjust->lower);
 139 }
 140
 141 int wxSpinCtrl::GetMax() const
 142 {
 143     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 144
 145     return (int)ceil(m_adjust->upper);
 146 }
 147
 148 int wxSpinCtrl::GetValue() const
 149 {
 150     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 151
 152     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 153
 154     return (int)ceil(m_adjust->value);
 155 }
 156
 157 void wxSpinCtrl::SetValue( const wxString& value )
 158 {
 159     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 160
 161     int n;
 162     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 163     {
 164         // a number - set it
 165         SetValue(n);
 166     }
 167     else
 168     {
 169         // invalid number - set text as is (wxMSW compatible)
 170         GtkDisableEvents();
 171         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 172         GtkEnableEvents();
 173     }
 174 }
 175
 176 void wxSpinCtrl::SetValue( int value )
 177 {
 178     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 179
 180     float fpos = (float)value;
 181     m_oldPos = fpos;
 182     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 183
 184     m_adjust->value = fpos;
 185
 186     GtkDisableEvents();
 187     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 188     GtkEnableEvents();
 189 }
 190
 191 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 192 {
 193     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 194
 195     float fmin = (float)minVal;
 196     float fmax = (float)maxVal;
 197
 198     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 199         (fabs(fmax-m_adjust->upper) < sensitivity))
 200     {
 201         return;
 202     }
 203
 204     m_adjust->lower = fmin;
 205     m_adjust->upper = fmax;
 206
 207     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 208
 209     // these two calls are required due to some bug in GTK
 210     Refresh();
 211     SetFocus();
 212 }
 213
 214 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 215 {
 216     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 217
 218     if (event.KeyCode() == WXK_RETURN)
 219     {
 220         wxWindow *top_frame = m_parent;
 221         while (top_frame->GetParent() && !(top_frame->GetParent()->m_isFrame))
 222             top_frame = top_frame->GetParent();
 223         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 224
 225         if (window->default_widget)
 226         {
 227             gtk_widget_activate (window->default_widget);
 228             return;
 229         }
 230     }
 231
 232     event.Skip();
 233 }
 234
 235 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 236 {
 237     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 238 }
 239
 240 void wxSpinCtrl::ApplyWidgetStyle()
 241 {
 242     SetWidgetStyle();
 243     gtk_widget_set_style( m_widget, m_widgetStyle );
 244 }
 245
 246 wxSize wxSpinCtrl::DoGetBestSize() const
 247 {
 248     wxSize ret( wxControl::DoGetBestSize() );
 249     return wxSize(95, ret.y);
 250 }
 251
 252 #endif
 253    // wxUSE_SPINCTRL