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         gtk_signal_disconnect_by_func( GTK_OBJECT (win->m_adjust),
  73                                        (GtkSignalFunc) gtk_spinbutt_callback,
  74                                        (gpointer) win );
  75
  76         gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
  77
  78         gtk_signal_connect( GTK_OBJECT (win->m_adjust),
  79                             "value_changed",
  80                             (GtkSignalFunc) gtk_spinbutt_callback,
  81                             (gpointer) win );
  82         return;
  83     }
  84
  85     win->m_oldPos = win->m_adjust->value;
  86
  87     /* always send a thumbtrack event */
  88     if (command != wxEVT_SCROLL_THUMBTRACK)
  89     {
  90         command = wxEVT_SCROLL_THUMBTRACK;
  91         wxSpinEvent event2( command, win->GetId());
  92         event2.SetPosition( value );
  93         event2.SetEventObject( win );
  94         win->GetEventHandler()->ProcessEvent( event2 );
  95     }
  96 }
  97 }
  98
  99 //-----------------------------------------------------------------------------
 100 // wxSpinButton
 101 //-----------------------------------------------------------------------------
 102
 103 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton,wxControl)
 104 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxNotifyEvent)
 105
 106 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
 107     EVT_SIZE(wxSpinButton::OnSize)
 108 END_EVENT_TABLE()
 109
 110 bool wxSpinButton::Create(wxWindow *parent,
 111                           wxWindowID id,
 112                           const wxPoint& pos,
 113                           const wxSize& size,
 114                           long style,
 115                           const wxString& name)
 116 {
 117     m_needParent = TRUE;
 118
 119     wxSize new_size = size,
 120            sizeBest = DoGetBestSize();
 121     new_size.x = sizeBest.x;            // override width always
 122     if (new_size.y == -1)
 123         new_size.y = sizeBest.y;
 124
 125     if (!PreCreation( parent, pos, new_size ) ||
 126         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 127     {
 128         wxFAIL_MSG( wxT("wxXX creation failed") );
 129         return FALSE;
 130     }
 131
 132     m_oldPos = 0.0;
 133
 134     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 135
 136     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 137
 138     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 139                               (int)(m_windowStyle & wxSP_WRAP) );
 140
 141     gtk_signal_connect( GTK_OBJECT (m_adjust),
 142                         "value_changed",
 143                         (GtkSignalFunc) gtk_spinbutt_callback,
 144                         (gpointer) this );
 145
 146     m_parent->DoAddChild( this );
 147
 148     PostCreation(new_size);
 149
 150     return TRUE;
 151 }
 152
 153 int wxSpinButton::GetMin() const
 154 {
 155     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 156
 157     return (int)ceil(m_adjust->lower);
 158 }
 159
 160 int wxSpinButton::GetMax() const
 161 {
 162     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 163
 164     return (int)ceil(m_adjust->upper);
 165 }
 166
 167 int wxSpinButton::GetValue() const
 168 {
 169     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 170
 171     return (int)ceil(m_adjust->value);
 172 }
 173
 174 void wxSpinButton::SetValue( int value )
 175 {
 176     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 177
 178     float fpos = (float)value;
 179     m_oldPos = fpos;
 180     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 181
 182     m_adjust->value = fpos;
 183
 184     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 185 }
 186
 187 void wxSpinButton::SetRange(int minVal, int maxVal)
 188 {
 189     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 190
 191     float fmin = (float)minVal;
 192     float fmax = (float)maxVal;
 193
 194     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 195         (fabs(fmax-m_adjust->upper) < sensitivity))
 196     {
 197         return;
 198     }
 199
 200     m_adjust->lower = fmin;
 201     m_adjust->upper = fmax;
 202
 203     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 204
 205     // these two calls are required due to some bug in GTK
 206     Refresh();
 207     SetFocus();
 208 }
 209
 210 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 211 {
 212     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 213
 214     m_width = DoGetBestSize().x;
 215     gtk_widget_set_usize( m_widget, m_width, m_height );
 216 }
 217
 218 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 219 {
 220     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 221 }
 222
 223 wxSize wxSpinButton::DoGetBestSize() const
 224 {
 225     wxSize best(15, 26); // FIXME
 226     CacheBestSize(best);
 227     return best;
 228 }
 229
 230 // static
 231 wxVisualAttributes
 232 wxSpinButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 233 {
 234     // TODO: overload to accept functions like gtk_spin_button_new?
 235     // Until then use a similar type
 236     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 237 }
 238
 239 #endif