src/gtk1/spinbutt.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/spinbutt.cpp
   3 // Purpose:     wxSpinButton
   4 // Author:      Robert
   5 // Modified by:
   6 // Copyright:   (c) Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_SPINBTN
  14
  15 #include "wx/spinbutt.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/utils.h"
  19     #include "wx/math.h"
  20 #endif
  21
  22 #include "wx/gtk1/private.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // idle system
  26 //-----------------------------------------------------------------------------
  27
  28 extern void wxapp_install_idle_handler();
  29 extern bool g_isIdle;
  30
  31 //-----------------------------------------------------------------------------
  32 // data
  33 //-----------------------------------------------------------------------------
  34
  35 extern bool   g_blockEventsOnDrag;
  36
  37 static const float sensitivity = 0.02;
  38
  39 //-----------------------------------------------------------------------------
  40 // "value_changed"
  41 //-----------------------------------------------------------------------------
  42
  43 extern "C" {
  44 static void gtk_spinbutt_callback( GtkWidget *WXUNUSED(widget), wxSpinButton *win )
  45 {
  46     if (g_isIdle) wxapp_install_idle_handler();
  47
  48     if (!win->m_hasVMT) return;
  49     if (g_blockEventsOnDrag) return;
  50
  51     float diff = win->m_adjust->value - win->m_oldPos;
  52     if (fabs(diff) < sensitivity) return;
  53
  54     wxEventType command = wxEVT_NULL;
  55
  56     float line_step = win->m_adjust->step_increment;
  57
  58     if (fabs(diff-line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  59     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEDOWN;
  60     else command = wxEVT_SCROLL_THUMBTRACK;
  61
  62     int value = (int)ceil(win->m_adjust->value);
  63
  64     wxSpinEvent event( command, win->GetId());
  65     event.SetPosition( value );
  66     event.SetEventObject( win );
  67
  68     if ((win->HandleWindowEvent( event )) &&
  69         !event.IsAllowed() )
  70     {
  71         /* program has vetoed */
  72         win->m_adjust->value = win->m_oldPos;
  73
  74         gtk_signal_disconnect_by_func( GTK_OBJECT (win->m_adjust),
  75                                        (GtkSignalFunc) gtk_spinbutt_callback,
  76                                        (gpointer) win );
  77
  78         gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
  79
  80         gtk_signal_connect( GTK_OBJECT (win->m_adjust),
  81                             "value_changed",
  82                             (GtkSignalFunc) gtk_spinbutt_callback,
  83                             (gpointer) win );
  84         return;
  85     }
  86
  87     win->m_oldPos = win->m_adjust->value;
  88
  89     /* always send a thumbtrack event */
  90     if (command != wxEVT_SCROLL_THUMBTRACK)
  91     {
  92         command = wxEVT_SCROLL_THUMBTRACK;
  93         wxSpinEvent event2( command, win->GetId());
  94         event2.SetPosition( value );
  95         event2.SetEventObject( win );
  96         win->HandleWindowEvent( event2 );
  97     }
  98 }
  99 }
 100
 101 //-----------------------------------------------------------------------------
 102 // wxSpinButton
 103 //-----------------------------------------------------------------------------
 104
 105 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
 106     EVT_SIZE(wxSpinButton::OnSize)
 107 END_EVENT_TABLE()
 108
 109 bool wxSpinButton::Create(wxWindow *parent,
 110                           wxWindowID id,
 111                           const wxPoint& pos,
 112                           const wxSize& size,
 113                           long style,
 114                           const wxString& name)
 115 {
 116     m_needParent = true;
 117
 118     wxSize new_size = size,
 119            sizeBest = DoGetBestSize();
 120     new_size.x = sizeBest.x;            // override width always
 121     if (new_size.y == -1)
 122         new_size.y = sizeBest.y;
 123
 124     if (!PreCreation( parent, pos, new_size ) ||
 125         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 126     {
 127         wxFAIL_MSG( wxT("wxXX creation failed") );
 128         return false;
 129     }
 130
 131     m_oldPos = 0.0;
 132
 133     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 134
 135     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 136
 137     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 138                               (int)(m_windowStyle & wxSP_WRAP) );
 139
 140     gtk_signal_connect( GTK_OBJECT (m_adjust),
 141                         "value_changed",
 142                         (GtkSignalFunc) gtk_spinbutt_callback,
 143                         (gpointer) this );
 144
 145     m_parent->DoAddChild( this );
 146
 147     PostCreation(new_size);
 148
 149     return true;
 150 }
 151
 152 int wxSpinButton::GetMin() const
 153 {
 154     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 155
 156     return (int)ceil(m_adjust->lower);
 157 }
 158
 159 int wxSpinButton::GetMax() const
 160 {
 161     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 162
 163     return (int)ceil(m_adjust->upper);
 164 }
 165
 166 int wxSpinButton::GetValue() const
 167 {
 168     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 169
 170     return (int)ceil(m_adjust->value);
 171 }
 172
 173 void wxSpinButton::SetValue( int value )
 174 {
 175     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 176
 177     float fpos = (float)value;
 178     m_oldPos = fpos;
 179     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 180
 181     m_adjust->value = fpos;
 182
 183     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 184 }
 185
 186 void wxSpinButton::SetRange(int minVal, int maxVal)
 187 {
 188     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 189
 190     float fmin = (float)minVal;
 191     float fmax = (float)maxVal;
 192
 193     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 194         (fabs(fmax-m_adjust->upper) < sensitivity))
 195     {
 196         return;
 197     }
 198
 199     m_adjust->lower = fmin;
 200     m_adjust->upper = fmax;
 201
 202     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 203
 204     // these two calls are required due to some bug in GTK
 205     Refresh();
 206     SetFocus();
 207 }
 208
 209 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 210 {
 211     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 212
 213     m_width = DoGetBestSize().x;
 214     gtk_widget_set_usize( m_widget, m_width, m_height );
 215 }
 216
 217 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 218 {
 219     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 220 }
 221
 222 wxSize wxSpinButton::DoGetBestSize() const
 223 {
 224     wxSize best(15, 26); // FIXME
 225     CacheBestSize(best);
 226     return best;
 227 }
 228
 229 // static
 230 wxVisualAttributes
 231 wxSpinButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 232 {
 233     // TODO: overload to accept functions like gtk_spin_button_new?
 234     // Until then use a similar type
 235     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 236 }
 237
 238 #endif // wxUSE_SPINBTN