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 #ifdef __GNUG__
  12     #pragma implementation "spinbutt.h"
  13     #pragma implementation "spinbutbase.h"
  14 #endif
  15
  16 #include "wx/spinbutt.h"
  17
  18 #if wxUSE_SPINBTN
  19
  20 #include "wx/utils.h"
  21
  22 #include <math.h>
  23
  24 #include "wx/gtk/private.h"
  25
  26 //-----------------------------------------------------------------------------
  27 // idle system
  28 //-----------------------------------------------------------------------------
  29
  30 extern void wxapp_install_idle_handler();
  31 extern bool g_isIdle;
  32
  33 //-----------------------------------------------------------------------------
  34 // data
  35 //-----------------------------------------------------------------------------
  36
  37 extern bool   g_blockEventsOnDrag;
  38
  39 static const float sensitivity = 0.02;
  40
  41 //-----------------------------------------------------------------------------
  42 // "value_changed"
  43 //-----------------------------------------------------------------------------
  44
  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->GetEventHandler()->ProcessEvent( 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->GetEventHandler()->ProcessEvent( event2 );
  98     }
  99 }
 100
 101 //-----------------------------------------------------------------------------
 102 // wxSpinButton
 103 //-----------------------------------------------------------------------------
 104
 105 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton,wxControl)
 106 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxNotifyEvent)
 107
 108 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
 109     EVT_SIZE(wxSpinButton::OnSize)
 110 END_EVENT_TABLE()
 111
 112 bool wxSpinButton::Create(wxWindow *parent,
 113                           wxWindowID id,
 114                           const wxPoint& pos,
 115                           const wxSize& size,
 116                           long style,
 117                           const wxString& name)
 118 {
 119     m_needParent = TRUE;
 120
 121     wxSize new_size = size,
 122            sizeBest = DoGetBestSize();
 123     new_size.x = sizeBest.x;            // override width always
 124     if (new_size.y == -1)
 125         new_size.y = sizeBest.y;
 126
 127     if (!PreCreation( parent, pos, new_size ) ||
 128         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 129     {
 130         wxFAIL_MSG( wxT("wxXX creation failed") );
 131             return FALSE;
 132     }
 133
 134     m_oldPos = 0.0;
 135
 136     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 137
 138     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 139
 140     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 141                               (int)(m_windowStyle & wxSP_WRAP) );
 142
 143     gtk_signal_connect( GTK_OBJECT (m_adjust),
 144                         "value_changed",
 145                         (GtkSignalFunc) gtk_spinbutt_callback,
 146                         (gpointer) this );
 147
 148     m_parent->DoAddChild( this );
 149
 150     PostCreation();
 151
 152     SetBackgroundColour( parent->GetBackgroundColour() );
 153
 154     Show( TRUE );
 155
 156     return TRUE;
 157 }
 158
 159 int wxSpinButton::GetMin() const
 160 {
 161     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 162
 163     return (int)ceil(m_adjust->lower);
 164 }
 165
 166 int wxSpinButton::GetMax() const
 167 {
 168     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 169
 170     return (int)ceil(m_adjust->upper);
 171 }
 172
 173 int wxSpinButton::GetValue() const
 174 {
 175     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 176
 177     return (int)ceil(m_adjust->value);
 178 }
 179
 180 void wxSpinButton::SetValue( int value )
 181 {
 182     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 183
 184     float fpos = (float)value;
 185     m_oldPos = fpos;
 186     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 187
 188     m_adjust->value = fpos;
 189
 190     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 191 }
 192
 193 void wxSpinButton::SetRange(int minVal, int maxVal)
 194 {
 195     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 196
 197     float fmin = (float)minVal;
 198     float fmax = (float)maxVal;
 199
 200     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 201         (fabs(fmax-m_adjust->upper) < sensitivity))
 202     {
 203         return;
 204     }
 205
 206     m_adjust->lower = fmin;
 207     m_adjust->upper = fmax;
 208
 209     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 210
 211     // these two calls are required due to some bug in GTK
 212     Refresh();
 213     SetFocus();
 214 }
 215
 216 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 217 {
 218     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 219
 220     m_width = DoGetBestSize().x;
 221     gtk_widget_set_usize( m_widget, m_width, m_height );
 222 }
 223
 224 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 225 {
 226     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 227 }
 228
 229 void wxSpinButton::ApplyWidgetStyle()
 230 {
 231     SetWidgetStyle();
 232     gtk_widget_set_style( m_widget, m_widgetStyle );
 233 }
 234
 235 wxSize wxSpinButton::DoGetBestSize() const
 236 {
 237     return wxSize(15, 26);
 238 }
 239
 240 #endif