src/gtk/spinbutt.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        spinbutt.cpp
   3 // Purpose:     wxSpinButton
   4 // Author:      Robert
   5 // Modified by:
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  12     #pragma implementation "spinbutt.h"
  13     #pragma implementation "spinbutbase.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #include "wx/spinbutt.h"
  20
  21 #if wxUSE_SPINBTN
  22
  23 #include "wx/utils.h"
  24 #include "wx/math.h"
  25 #include "wx/gtk/private.h"
  26
  27 //-----------------------------------------------------------------------------
  28 // idle system
  29 //-----------------------------------------------------------------------------
  30
  31 extern void wxapp_install_idle_handler();
  32 extern bool g_isIdle;
  33
  34 //-----------------------------------------------------------------------------
  35 // data
  36 //-----------------------------------------------------------------------------
  37
  38 extern bool   g_blockEventsOnDrag;
  39
  40 static const float sensitivity = 0.02;
  41
  42 //-----------------------------------------------------------------------------
  43 // "value_changed"
  44 //-----------------------------------------------------------------------------
  45
  46 extern "C" {
  47 static void gtk_spinbutt_callback( GtkWidget *WXUNUSED(widget), wxSpinButton *win )
  48 {
  49     if (g_isIdle) wxapp_install_idle_handler();
  50
  51     if (!win->m_hasVMT) return;
  52     if (g_blockEventsOnDrag) return;
  53
  54     float diff = win->m_adjust->value - win->m_oldPos;
  55     if (fabs(diff) < sensitivity) return;
  56
  57     wxEventType command = wxEVT_NULL;
  58
  59     float line_step = win->m_adjust->step_increment;
  60
  61     if (fabs(diff-line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  62     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEDOWN;
  63     else command = wxEVT_SCROLL_THUMBTRACK;
  64
  65     int value = (int)ceil(win->m_adjust->value);
  66
  67     wxSpinEvent event( command, win->GetId());
  68     event.SetPosition( value );
  69     event.SetEventObject( win );
  70
  71     if ((win->GetEventHandler()->ProcessEvent( event )) &&
  72         !event.IsAllowed() )
  73     {
  74         /* program has vetoed */
  75         win->m_adjust->value = win->m_oldPos;
  76
  77         gtk_signal_disconnect_by_func( GTK_OBJECT (win->m_adjust),
  78                                        (GtkSignalFunc) gtk_spinbutt_callback,
  79                                        (gpointer) win );
  80
  81         gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
  82
  83         gtk_signal_connect( GTK_OBJECT (win->m_adjust),
  84                             "value_changed",
  85                             (GtkSignalFunc) gtk_spinbutt_callback,
  86                             (gpointer) win );
  87         return;
  88     }
  89
  90     win->m_oldPos = win->m_adjust->value;
  91
  92     /* always send a thumbtrack event */
  93     if (command != wxEVT_SCROLL_THUMBTRACK)
  94     {
  95         command = wxEVT_SCROLL_THUMBTRACK;
  96         wxSpinEvent event2( command, win->GetId());
  97         event2.SetPosition( value );
  98         event2.SetEventObject( win );
  99         win->GetEventHandler()->ProcessEvent( event2 );
 100     }
 101 }
 102 }
 103
 104 //-----------------------------------------------------------------------------
 105 // wxSpinButton
 106 //-----------------------------------------------------------------------------
 107
 108 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton,wxControl)
 109 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxNotifyEvent)
 110
 111 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
 112     EVT_SIZE(wxSpinButton::OnSize)
 113 END_EVENT_TABLE()
 114
 115 bool wxSpinButton::Create(wxWindow *parent,
 116                           wxWindowID id,
 117                           const wxPoint& pos,
 118                           const wxSize& size,
 119                           long style,
 120                           const wxString& name)
 121 {
 122     m_needParent = TRUE;
 123
 124     wxSize new_size = size,
 125            sizeBest = DoGetBestSize();
 126     new_size.x = sizeBest.x;            // override width always
 127     if (new_size.y == -1)
 128         new_size.y = sizeBest.y;
 129
 130     if (!PreCreation( parent, pos, new_size ) ||
 131         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 132     {
 133         wxFAIL_MSG( wxT("wxXX creation failed") );
 134         return FALSE;
 135     }
 136
 137     m_oldPos = 0.0;
 138
 139     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 140
 141     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 142
 143     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 144                               (int)(m_windowStyle & wxSP_WRAP) );
 145
 146     gtk_signal_connect( GTK_OBJECT (m_adjust),
 147                         "value_changed",
 148                         (GtkSignalFunc) gtk_spinbutt_callback,
 149                         (gpointer) this );
 150
 151     m_parent->DoAddChild( this );
 152
 153     PostCreation(new_size);
 154
 155     return TRUE;
 156 }
 157
 158 int wxSpinButton::GetMin() const
 159 {
 160     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 161
 162     return (int)ceil(m_adjust->lower);
 163 }
 164
 165 int wxSpinButton::GetMax() const
 166 {
 167     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 168
 169     return (int)ceil(m_adjust->upper);
 170 }
 171
 172 int wxSpinButton::GetValue() const
 173 {
 174     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 175
 176     return (int)ceil(m_adjust->value);
 177 }
 178
 179 void wxSpinButton::SetValue( int value )
 180 {
 181     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 182
 183     float fpos = (float)value;
 184     m_oldPos = fpos;
 185     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 186
 187     m_adjust->value = fpos;
 188
 189     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 190 }
 191
 192 void wxSpinButton::SetRange(int minVal, int maxVal)
 193 {
 194     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 195
 196     float fmin = (float)minVal;
 197     float fmax = (float)maxVal;
 198
 199     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 200         (fabs(fmax-m_adjust->upper) < sensitivity))
 201     {
 202         return;
 203     }
 204
 205     m_adjust->lower = fmin;
 206     m_adjust->upper = fmax;
 207
 208     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 209
 210     // these two calls are required due to some bug in GTK
 211     Refresh();
 212     SetFocus();
 213 }
 214
 215 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 216 {
 217     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 218
 219     m_width = DoGetBestSize().x;
 220     gtk_widget_set_usize( m_widget, m_width, m_height );
 221 }
 222
 223 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 224 {
 225     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 226 }
 227
 228 wxSize wxSpinButton::DoGetBestSize() const
 229 {
 230     wxSize best(15, 26); // FIXME
 231     CacheBestSize(best);
 232     return best;
 233 }
 234
 235 // static
 236 wxVisualAttributes
 237 wxSpinButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 238 {
 239     // TODO: overload to accept functions like gtk_spin_button_new?
 240     // Until then use a similar type
 241     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 242 }
 243
 244 #endif