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