src/gtk1/spinbutt.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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     #include "wx/math.h"
  21 #endif
  22
  23 #include "wx/gtk1/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // idle system
  27 //-----------------------------------------------------------------------------
  28
  29 extern void wxapp_install_idle_handler();
  30 extern bool g_isIdle;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37
  38 static const float sensitivity = 0.02;
  39
  40 //-----------------------------------------------------------------------------
  41 // "value_changed"
  42 //-----------------------------------------------------------------------------
  43
  44 extern "C" {
  45 static void gtk_spinbutt_callback( GtkWidget *WXUNUSED(widget), wxSpinButton *win )
  46 {
  47     if (g_isIdle) wxapp_install_idle_handler();
  48
  49     if (!win->m_hasVMT) return;
  50     if (g_blockEventsOnDrag) return;
  51
  52     float diff = win->m_adjust->value - win->m_oldPos;
  53     if (fabs(diff) < sensitivity) return;
  54
  55     wxEventType command = wxEVT_NULL;
  56
  57     float line_step = win->m_adjust->step_increment;
  58
  59     if (fabs(diff-line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  60     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEDOWN;
  61     else command = wxEVT_SCROLL_THUMBTRACK;
  62
  63     int value = (int)ceil(win->m_adjust->value);
  64
  65     wxSpinEvent event( command, win->GetId());
  66     event.SetPosition( value );
  67     event.SetEventObject( win );
  68
  69     if ((win->HandleWindowEvent( event )) &&
  70         !event.IsAllowed() )
  71     {
  72         /* program has vetoed */
  73         win->m_adjust->value = win->m_oldPos;
  74
  75         gtk_signal_disconnect_by_func( GTK_OBJECT (win->m_adjust),
  76                                        (GtkSignalFunc) gtk_spinbutt_callback,
  77                                        (gpointer) win );
  78
  79         gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
  80
  81         gtk_signal_connect( GTK_OBJECT (win->m_adjust),
  82                             "value_changed",
  83                             (GtkSignalFunc) gtk_spinbutt_callback,
  84                             (gpointer) win );
  85         return;
  86     }
  87
  88     win->m_oldPos = win->m_adjust->value;
  89
  90     /* always send a thumbtrack event */
  91     if (command != wxEVT_SCROLL_THUMBTRACK)
  92     {
  93         command = wxEVT_SCROLL_THUMBTRACK;
  94         wxSpinEvent event2( command, win->GetId());
  95         event2.SetPosition( value );
  96         event2.SetEventObject( win );
  97         win->HandleWindowEvent( event2 );
  98     }
  99 }
 100 }
 101
 102 //-----------------------------------------------------------------------------
 103 // wxSpinButton
 104 //-----------------------------------------------------------------------------
 105
 106 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton,wxControl)
 107 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxNotifyEvent)
 108
 109 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
 110     EVT_SIZE(wxSpinButton::OnSize)
 111 END_EVENT_TABLE()
 112
 113 bool wxSpinButton::Create(wxWindow *parent,
 114                           wxWindowID id,
 115                           const wxPoint& pos,
 116                           const wxSize& size,
 117                           long style,
 118                           const wxString& name)
 119 {
 120     m_needParent = true;
 121
 122     wxSize new_size = size,
 123            sizeBest = DoGetBestSize();
 124     new_size.x = sizeBest.x;            // override width always
 125     if (new_size.y == -1)
 126         new_size.y = sizeBest.y;
 127
 128     if (!PreCreation( parent, pos, new_size ) ||
 129         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 130     {
 131         wxFAIL_MSG( wxT("wxXX creation failed") );
 132         return false;
 133     }
 134
 135     m_oldPos = 0.0;
 136
 137     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 138
 139     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 140
 141     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 142                               (int)(m_windowStyle & wxSP_WRAP) );
 143
 144     gtk_signal_connect( GTK_OBJECT (m_adjust),
 145                         "value_changed",
 146                         (GtkSignalFunc) gtk_spinbutt_callback,
 147                         (gpointer) this );
 148
 149     m_parent->DoAddChild( this );
 150
 151     PostCreation(new_size);
 152
 153     return true;
 154 }
 155
 156 int wxSpinButton::GetMin() const
 157 {
 158     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 159
 160     return (int)ceil(m_adjust->lower);
 161 }
 162
 163 int wxSpinButton::GetMax() const
 164 {
 165     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 166
 167     return (int)ceil(m_adjust->upper);
 168 }
 169
 170 int wxSpinButton::GetValue() const
 171 {
 172     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 173
 174     return (int)ceil(m_adjust->value);
 175 }
 176
 177 void wxSpinButton::SetValue( int value )
 178 {
 179     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 180
 181     float fpos = (float)value;
 182     m_oldPos = fpos;
 183     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 184
 185     m_adjust->value = fpos;
 186
 187     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 188 }
 189
 190 void wxSpinButton::SetRange(int minVal, int maxVal)
 191 {
 192     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 193
 194     float fmin = (float)minVal;
 195     float fmax = (float)maxVal;
 196
 197     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 198         (fabs(fmax-m_adjust->upper) < sensitivity))
 199     {
 200         return;
 201     }
 202
 203     m_adjust->lower = fmin;
 204     m_adjust->upper = fmax;
 205
 206     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 207
 208     // these two calls are required due to some bug in GTK
 209     Refresh();
 210     SetFocus();
 211 }
 212
 213 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 214 {
 215     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 216
 217     m_width = DoGetBestSize().x;
 218     gtk_widget_set_usize( m_widget, m_width, m_height );
 219 }
 220
 221 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 222 {
 223     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 224 }
 225
 226 wxSize wxSpinButton::DoGetBestSize() const
 227 {
 228     wxSize best(15, 26); // FIXME
 229     CacheBestSize(best);
 230     return best;
 231 }
 232
 233 // static
 234 wxVisualAttributes
 235 wxSpinButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 236 {
 237     // TODO: overload to accept functions like gtk_spin_button_new?
 238     // Until then use a similar type
 239     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 240 }
 241
 242 #endif // wxUSE_SPINBTN