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 //  "changed"
  60 //-----------------------------------------------------------------------------
  61
  62 static void
  63 gtk_spinctrl_text_changed_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  64 {
  65     if (!win->m_hasVMT) return;
  66
  67     if (g_isIdle)
  68         wxapp_install_idle_handler();
  69
  70     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
  71     event.SetEventObject( win );
  72     event.SetInt( win->GetValue() );
  73     win->GetEventHandler()->ProcessEvent( event );
  74 }
  75
  76 //-----------------------------------------------------------------------------
  77 // wxSpinCtrl
  78 //-----------------------------------------------------------------------------
  79
  80 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  81
  82 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  83     EVT_CHAR(wxSpinCtrl::OnChar)
  84 END_EVENT_TABLE()
  85
  86 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  87                         const wxString& value,
  88                         const wxPoint& pos,  const wxSize& size,
  89                         long style,
  90                         int min, int max, int initial,
  91                         const wxString& name)
  92 {
  93     m_needParent = TRUE;
  94     m_acceptsFocus = TRUE;
  95
  96     if (!PreCreation( parent, pos, size ) ||
  97         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
  98     {
  99         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 100         return FALSE;
 101     }
 102
 103     m_oldPos = initial;
 104
 105     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 106
 107     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 108
 109     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 110                               (int)(m_windowStyle & wxSP_WRAP) );
 111
 112     GtkEnableEvents();
 113
 114     m_parent->DoAddChild( this );
 115
 116     PostCreation();
 117
 118     SetFont( parent->GetFont() );
 119
 120     wxSize size_best( DoGetBestSize() );
 121     wxSize new_size( size );
 122     if (new_size.x == -1)
 123         new_size.x = size_best.x;
 124     if (new_size.y == -1)
 125         new_size.y = size_best.y;
 126     if (new_size.y > size_best.y)
 127         new_size.y = size_best.y;
 128     if ((new_size.x != size.x) || (new_size.y != size.y))
 129         SetSize( new_size.x, new_size.y );
 130
 131     SetBackgroundColour( parent->GetBackgroundColour() );
 132
 133     SetValue( value );
 134
 135     Show( TRUE );
 136
 137     return TRUE;
 138 }
 139
 140 void wxSpinCtrl::GtkDisableEvents()
 141 {
 142     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 143                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 144                         (gpointer) this );
 145
 146     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 147                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 148                         (gpointer) this );
 149 }
 150
 151 void wxSpinCtrl::GtkEnableEvents()
 152 {
 153     gtk_signal_connect( GTK_OBJECT (m_adjust),
 154                         "value_changed",
 155                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 156                         (gpointer) this );
 157
 158     gtk_signal_connect( GTK_OBJECT(m_widget),
 159                         "changed",
 160                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 161                         (gpointer)this);
 162 }
 163
 164 int wxSpinCtrl::GetMin() const
 165 {
 166     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 167
 168     return (int)ceil(m_adjust->lower);
 169 }
 170
 171 int wxSpinCtrl::GetMax() const
 172 {
 173     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 174
 175     return (int)ceil(m_adjust->upper);
 176 }
 177
 178 int wxSpinCtrl::GetValue() const
 179 {
 180     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 181
 182     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 183
 184     return (int)ceil(m_adjust->value);
 185 }
 186
 187 void wxSpinCtrl::SetValue( const wxString& value )
 188 {
 189     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 190
 191     int n;
 192     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 193     {
 194         // a number - set it
 195         SetValue(n);
 196     }
 197     else
 198     {
 199         // invalid number - set text as is (wxMSW compatible)
 200         GtkDisableEvents();
 201         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 202         GtkEnableEvents();
 203     }
 204 }
 205
 206 void wxSpinCtrl::SetValue( int value )
 207 {
 208     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 209
 210     float fpos = (float)value;
 211     m_oldPos = fpos;
 212     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 213
 214     m_adjust->value = fpos;
 215
 216     GtkDisableEvents();
 217     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 218     GtkEnableEvents();
 219 }
 220
 221 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 222 {
 223     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 224
 225     float fmin = (float)minVal;
 226     float fmax = (float)maxVal;
 227
 228     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 229         (fabs(fmax-m_adjust->upper) < sensitivity))
 230     {
 231         return;
 232     }
 233
 234     m_adjust->lower = fmin;
 235     m_adjust->upper = fmax;
 236
 237     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 238
 239     // these two calls are required due to some bug in GTK
 240     Refresh();
 241     SetFocus();
 242 }
 243
 244 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 245 {
 246     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 247
 248     if (event.KeyCode() == WXK_RETURN)
 249     {
 250         wxWindow *top_frame = m_parent;
 251         while (top_frame->GetParent() && !(top_frame->GetParent()->IsTopLevel()))
 252             top_frame = top_frame->GetParent();
 253         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 254
 255         if (window->default_widget)
 256         {
 257             gtk_widget_activate (window->default_widget);
 258             return;
 259         }
 260     }
 261
 262     event.Skip();
 263 }
 264
 265 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 266 {
 267     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 268 }
 269
 270 void wxSpinCtrl::ApplyWidgetStyle()
 271 {
 272     SetWidgetStyle();
 273     gtk_widget_set_style( m_widget, m_widgetStyle );
 274 }
 275
 276 wxSize wxSpinCtrl::DoGetBestSize() const
 277 {
 278     wxSize ret( wxControl::DoGetBestSize() );
 279     return wxSize(95, ret.y);
 280 }
 281
 282 #endif
 283    // wxUSE_SPINCTRL