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 #if wxUSE_SPINCTRL
  18
  19 #include "wx/utils.h"
  20 #include "wx/spinbutt.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_spinctrl_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *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     win->m_oldPos = win->m_adjust->value;
  56
  57     wxEventType command = wxEVT_NULL;
  58
  59     float line_step = win->m_adjust->step_increment;
  60
  61     if (fabs(diff-line_step) < sensitivity) command = wxEVT_SCROLL_LINEDOWN;
  62     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  63     else command = wxEVT_SCROLL_THUMBTRACK;
  64
  65     int value = (int)ceil(win->m_adjust->value);
  66
  67     wxSpinEvent event( command, win->GetId());
  68     event.SetPosition( value );
  69     event.SetEventObject( win );
  70     win->GetEventHandler()->ProcessEvent( event );
  71
  72     /* always send a thumbtrack event */
  73     if (command != wxEVT_SCROLL_THUMBTRACK)
  74     {
  75         command = wxEVT_SCROLL_THUMBTRACK;
  76         wxSpinEvent event2( command, win->GetId());
  77         event2.SetPosition( value );
  78         event2.SetEventObject( win );
  79         win->GetEventHandler()->ProcessEvent( event2 );
  80     }
  81 }
  82
  83 //-----------------------------------------------------------------------------
  84 // wxSpinCtrl
  85 //-----------------------------------------------------------------------------
  86
  87 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  88
  89 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  90     EVT_CHAR(wxSpinCtrl::OnChar)
  91 END_EVENT_TABLE()
  92
  93 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  94                         const wxString& value,
  95                         const wxPoint& pos,  const wxSize& size,
  96                         long style,
  97                         int min, int max, int initial,
  98                         const wxString& name)
  99 {
 100     m_needParent = TRUE;
 101     m_acceptsFocus = TRUE;
 102
 103     wxSize new_size = size;
 104     if (new_size.y == -1)
 105         new_size.y = 26;
 106
 107     if (!PreCreation( parent, pos, new_size ) ||
 108         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 109     {
 110         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 111         return FALSE;
 112     }
 113
 114     m_oldPos = initial;
 115
 116     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 117
 118     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 119
 120     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 121                               (int)(m_windowStyle & wxSP_WRAP) );
 122
 123     gtk_signal_connect( GTK_OBJECT (m_adjust),
 124                         "value_changed",
 125                         (GtkSignalFunc) gtk_spinctrl_callback,
 126                         (gpointer) this );
 127
 128     m_parent->DoAddChild( this );
 129
 130     PostCreation();
 131
 132     SetBackgroundColour( parent->GetBackgroundColour() );
 133
 134     SetValue( value );
 135
 136     Show( TRUE );
 137
 138     return TRUE;
 139 }
 140
 141 int wxSpinCtrl::GetMin() const
 142 {
 143     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 144
 145     return (int)ceil(m_adjust->lower);
 146 }
 147
 148 int wxSpinCtrl::GetMax() const
 149 {
 150     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 151
 152     return (int)ceil(m_adjust->upper);
 153 }
 154
 155 int wxSpinCtrl::GetValue() const
 156 {
 157     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 158
 159     return (int)ceil(m_adjust->value);
 160 }
 161
 162 void wxSpinCtrl::SetValue( const wxString& value )
 163 {
 164     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 165
 166     int n;
 167     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 168     {
 169         // a number - set it
 170         SetValue(n);
 171     }
 172     else
 173     {
 174         // invalid number - set text as is (wxMSW compatible)
 175         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 176     }
 177 }
 178
 179 void wxSpinCtrl::SetValue( int value )
 180 {
 181     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 182
 183     float fpos = (float)value;
 184     m_oldPos = fpos;
 185     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 186
 187     m_adjust->value = fpos;
 188
 189     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 190 }
 191
 192 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 193 {
 194     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 195
 196     float fmin = (float)minVal;
 197     float fmax = (float)maxVal;
 198
 199     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 200         (fabs(fmax-m_adjust->upper) < sensitivity))
 201     {
 202         return;
 203     }
 204
 205     m_adjust->lower = fmin;
 206     m_adjust->upper = fmax;
 207
 208     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 209
 210     // these two calls are required due to some bug in GTK
 211     Refresh();
 212     SetFocus();
 213 }
 214
 215 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 216 {
 217     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 218
 219     if (event.KeyCode() == WXK_RETURN)
 220     {
 221         wxWindow *top_frame = m_parent;
 222         while (top_frame->GetParent() && !(top_frame->GetParent()->m_isFrame))
 223             top_frame = top_frame->GetParent();
 224         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 225
 226         if (window->default_widget)
 227         {
 228             gtk_widget_activate (window->default_widget);
 229             return;
 230         }
 231     }
 232
 233     event.Skip();
 234 }
 235
 236 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 237 {
 238     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 239 }
 240
 241 void wxSpinCtrl::ApplyWidgetStyle()
 242 {
 243     SetWidgetStyle();
 244     gtk_widget_set_style( m_widget, m_widgetStyle );
 245 }
 246
 247 #endif
 248    // wxUSE_SPINCTRL