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