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