src/gtk/spinctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        spinbutt.cpp
   3 // Purpose:     wxSpinCtrl
   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 "spinctrl.h"
  13 #endif
  14
  15 #include "wx/spinctrl.h"
  16
  17 #ifdef wxUSE_SPINBTN
  18
  19 #include "wx/utils.h"
  20 #include "wx/spinbutt.h"
  21 #include <math.h>
  22
  23 #include "gdk/gdk.h"
  24 #include "gtk/gtk.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_spinctrl_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *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     win->m_oldPos = win->m_adjust->value;
  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_LINEDOWN;
  61     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  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     win->GetEventHandler()->ProcessEvent( event );
  70
  71     /* always send a thumbtrack event */
  72     if (command != wxEVT_SCROLL_THUMBTRACK)
  73     {
  74         command = wxEVT_SCROLL_THUMBTRACK;
  75         wxSpinEvent event2( command, win->GetId());
  76         event2.SetPosition( value );
  77         event2.SetEventObject( win );
  78         win->GetEventHandler()->ProcessEvent( event2 );
  79     }
  80 }
  81
  82 //-----------------------------------------------------------------------------
  83 // wxSpinCtrl
  84 //-----------------------------------------------------------------------------
  85
  86 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  87
  88 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  89     EVT_CHAR(wxSpinCtrl::OnChar)
  90 END_EVENT_TABLE()
  91
  92 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  93                         const wxString& value,
  94                         const wxPoint& pos,  const wxSize& size,
  95                         long style,
  96                         int min, int max, int initial,
  97                         const wxString& name)
  98 {
  99     m_needParent = TRUE;
 100     m_acceptsFocus = TRUE;
 101
 102     wxSize new_size = size;
 103     if (new_size.y == -1)
 104         new_size.y = 26;
 105
 106     if (!PreCreation( parent, pos, new_size ) ||
 107         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 108     {
 109         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 110         return FALSE;
 111     }
 112
 113     m_oldPos = initial;
 114
 115     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 116
 117     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 118
 119     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 120                               (int)(m_windowStyle & wxSP_WRAP) );
 121
 122     gtk_signal_connect( GTK_OBJECT (m_adjust),
 123                         "value_changed",
 124                         (GtkSignalFunc) gtk_spinctrl_callback,
 125                         (gpointer) this );
 126
 127     m_parent->DoAddChild( this );
 128
 129     PostCreation();
 130
 131     SetBackgroundColour( parent->GetBackgroundColour() );
 132
 133     SetValue( value );
 134
 135     Show( TRUE );
 136
 137     return TRUE;
 138 }
 139
 140 int wxSpinCtrl::GetMin() const
 141 {
 142     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 143
 144     return (int)ceil(m_adjust->lower);
 145 }
 146
 147 int wxSpinCtrl::GetMax() const
 148 {
 149     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 150
 151     return (int)ceil(m_adjust->upper);
 152 }
 153
 154 int wxSpinCtrl::GetValue() const
 155 {
 156     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 157
 158     return (int)ceil(m_adjust->value);
 159 }
 160
 161 void wxSpinCtrl::SetValue( const wxString& value )
 162 {
 163     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 164
 165     int n;
 166     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 167     {
 168         // a number - set it
 169         SetValue(n);
 170     }
 171     else
 172     {
 173         // invalid number - set text as is (wxMSW compatible)
 174         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 175     }
 176 }
 177
 178 void wxSpinCtrl::SetValue( int value )
 179 {
 180     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 181
 182     float fpos = (float)value;
 183     m_oldPos = fpos;
 184     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 185
 186     m_adjust->value = fpos;
 187
 188     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 189 }
 190
 191 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 192 {
 193     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 194
 195     float fmin = (float)minVal;
 196     float fmax = (float)maxVal;
 197
 198     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 199         (fabs(fmax-m_adjust->upper) < sensitivity))
 200     {
 201         return;
 202     }
 203
 204     m_adjust->lower = fmin;
 205     m_adjust->upper = fmax;
 206
 207     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 208
 209     // these two calls are required due to some bug in GTK
 210     Refresh();
 211     SetFocus();
 212 }
 213
 214 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 215 {
 216     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 217
 218     if (event.KeyCode() == WXK_RETURN)
 219     {
 220         wxWindow *top_frame = m_parent;
 221         while (top_frame->GetParent() && !(top_frame->GetParent()->m_isFrame))
 222             top_frame = top_frame->GetParent();
 223         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 224
 225         if (window->default_widget)
 226         {
 227             gtk_widget_activate (window->default_widget);
 228             return;
 229         }
 230     }
 231
 232     event.Skip();
 233 }
 234
 235 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 236 {
 237     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 238 }
 239
 240 void wxSpinCtrl::ApplyWidgetStyle()
 241 {
 242     SetWidgetStyle();
 243     gtk_widget_set_style( m_widget, m_widgetStyle );
 244 }
 245
 246 #endif