src/gtk/spinbutt.cpp

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