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     wxSize new_size = size,
  79            sizeBest = DoGetBestSize();
  80     if (new_size.x == -1)
  81         new_size.x = sizeBest.x;
  82     if (new_size.y == -1)
  83         new_size.y = sizeBest.y;
  84
  85     if (!PreCreation( parent, pos, new_size ) ||
  86         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
  87     {
  88         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
  89         return FALSE;
  90     }
  91
  92     m_oldPos = initial;
  93
  94     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
  95
  96     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
  97
  98     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
  99                               (int)(m_windowStyle & wxSP_WRAP) );
 100
 101     gtk_signal_connect( GTK_OBJECT (m_adjust),
 102                         "value_changed",
 103                         (GtkSignalFunc) gtk_spinctrl_callback,
 104                         (gpointer) this );
 105
 106     m_parent->DoAddChild( this );
 107
 108     PostCreation();
 109
 110     SetBackgroundColour( parent->GetBackgroundColour() );
 111
 112     SetValue( value );
 113
 114     Show( TRUE );
 115
 116     return TRUE;
 117 }
 118
 119 int wxSpinCtrl::GetMin() const
 120 {
 121     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 122
 123     return (int)ceil(m_adjust->lower);
 124 }
 125
 126 int wxSpinCtrl::GetMax() const
 127 {
 128     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 129
 130     return (int)ceil(m_adjust->upper);
 131 }
 132
 133 int wxSpinCtrl::GetValue() const
 134 {
 135     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 136
 137     return (int)ceil(m_adjust->value);
 138 }
 139
 140 void wxSpinCtrl::SetValue( const wxString& value )
 141 {
 142     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 143
 144     int n;
 145     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 146     {
 147         // a number - set it
 148         SetValue(n);
 149     }
 150     else
 151     {
 152         // invalid number - set text as is (wxMSW compatible)
 153         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 154     }
 155 }
 156
 157 void wxSpinCtrl::SetValue( int value )
 158 {
 159     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 160
 161     float fpos = (float)value;
 162     m_oldPos = fpos;
 163     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 164
 165     m_adjust->value = fpos;
 166
 167     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 168 }
 169
 170 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 171 {
 172     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 173
 174     float fmin = (float)minVal;
 175     float fmax = (float)maxVal;
 176
 177     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 178         (fabs(fmax-m_adjust->upper) < sensitivity))
 179     {
 180         return;
 181     }
 182
 183     m_adjust->lower = fmin;
 184     m_adjust->upper = fmax;
 185
 186     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 187
 188     // these two calls are required due to some bug in GTK
 189     Refresh();
 190     SetFocus();
 191 }
 192
 193 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 194 {
 195     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 196
 197     if (event.KeyCode() == WXK_RETURN)
 198     {
 199         wxWindow *top_frame = m_parent;
 200         while (top_frame->GetParent() && !(top_frame->GetParent()->m_isFrame))
 201             top_frame = top_frame->GetParent();
 202         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 203
 204         if (window->default_widget)
 205         {
 206             gtk_widget_activate (window->default_widget);
 207             return;
 208         }
 209     }
 210
 211     event.Skip();
 212 }
 213
 214 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 215 {
 216     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 217 }
 218
 219 void wxSpinCtrl::ApplyWidgetStyle()
 220 {
 221     SetWidgetStyle();
 222     gtk_widget_set_style( m_widget, m_widgetStyle );
 223 }
 224
 225 wxSize wxSpinCtrl::DoGetBestSize() const
 226 {
 227     return wxSize(95, 26);
 228 }
 229
 230 #endif
 231    // wxUSE_SPINCTRL