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 <gdk/gdk.h>
  25 #include <gtk/gtk.h>
  26
  27 //-----------------------------------------------------------------------------
  28 // idle system
  29 //-----------------------------------------------------------------------------
  30
  31 extern void wxapp_install_idle_handler();
  32 extern bool g_isIdle;
  33
  34 //-----------------------------------------------------------------------------
  35 // data
  36 //-----------------------------------------------------------------------------
  37
  38 extern bool   g_blockEventsOnDrag;
  39
  40 static const float sensitivity = 0.02;
  41
  42 //-----------------------------------------------------------------------------
  43 // "value_changed"
  44 //-----------------------------------------------------------------------------
  45
  46 static void gtk_spinbutt_callback( GtkWidget *WXUNUSED(widget), wxSpinButton *win )
  47 {
  48     if (g_isIdle) wxapp_install_idle_handler();
  49
  50     if (!win->m_hasVMT) return;
  51     if (g_blockEventsOnDrag) return;
  52
  53     float diff = win->m_adjust->value - win->m_oldPos;
  54     if (fabs(diff) < sensitivity) return;
  55
  56     wxEventType command = wxEVT_NULL;
  57
  58     float line_step = win->m_adjust->step_increment;
  59
  60     if (fabs(diff-line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  61     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEDOWN;
  62     else command = wxEVT_SCROLL_THUMBTRACK;
  63
  64     int value = (int)ceil(win->m_adjust->value);
  65
  66     wxSpinEvent event( command, win->GetId());
  67     event.SetPosition( value );
  68     event.SetEventObject( win );
  69
  70     if ((win->GetEventHandler()->ProcessEvent( event )) &&
  71         !event.IsAllowed() )
  72     {
  73         /* program has vetoed */
  74         win->m_adjust->value = win->m_oldPos;
  75
  76         gtk_signal_disconnect_by_func( GTK_OBJECT (win->m_adjust),
  77                         (GtkSignalFunc) gtk_spinbutt_callback,
  78                         (gpointer) win );
  79
  80         gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
  81
  82         gtk_signal_connect( GTK_OBJECT (win->m_adjust),
  83                         "value_changed",
  84                         (GtkSignalFunc) gtk_spinbutt_callback,
  85                         (gpointer) win );
  86         return;
  87     }
  88
  89     win->m_oldPos = win->m_adjust->value;
  90
  91     /* always send a thumbtrack event */
  92     if (command != wxEVT_SCROLL_THUMBTRACK)
  93     {
  94         command = wxEVT_SCROLL_THUMBTRACK;
  95         wxSpinEvent event2( command, win->GetId());
  96         event2.SetPosition( value );
  97         event2.SetEventObject( win );
  98         win->GetEventHandler()->ProcessEvent( event2 );
  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();
 152
 153     SetBackgroundColour( parent->GetBackgroundColour() );
 154
 155     Show( TRUE );
 156
 157     return TRUE;
 158 }
 159
 160 int wxSpinButton::GetMin() const
 161 {
 162     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 163
 164     return (int)ceil(m_adjust->lower);
 165 }
 166
 167 int wxSpinButton::GetMax() const
 168 {
 169     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 170
 171     return (int)ceil(m_adjust->upper);
 172 }
 173
 174 int wxSpinButton::GetValue() const
 175 {
 176     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 177
 178     return (int)ceil(m_adjust->value);
 179 }
 180
 181 void wxSpinButton::SetValue( int value )
 182 {
 183     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 184
 185     float fpos = (float)value;
 186     m_oldPos = fpos;
 187     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 188
 189     m_adjust->value = fpos;
 190
 191     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 192 }
 193
 194 void wxSpinButton::SetRange(int minVal, int maxVal)
 195 {
 196     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 197
 198     float fmin = (float)minVal;
 199     float fmax = (float)maxVal;
 200
 201     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 202         (fabs(fmax-m_adjust->upper) < sensitivity))
 203     {
 204         return;
 205     }
 206
 207     m_adjust->lower = fmin;
 208     m_adjust->upper = fmax;
 209
 210     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 211
 212     // these two calls are required due to some bug in GTK
 213     Refresh();
 214     SetFocus();
 215 }
 216
 217 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 218 {
 219     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 220
 221     m_width = DoGetBestSize().x;
 222     gtk_widget_set_usize( m_widget, m_width, m_height );
 223 }
 224
 225 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 226 {
 227     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 228 }
 229
 230 void wxSpinButton::ApplyWidgetStyle()
 231 {
 232     SetWidgetStyle();
 233     gtk_widget_set_style( m_widget, m_widgetStyle );
 234 }
 235
 236 wxSize wxSpinButton::DoGetBestSize() const
 237 {
 238     return wxSize(15, 26);
 239 }
 240
 241 #endif