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
  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 static const float sensitivity = 0.02;
  34
  35 //-----------------------------------------------------------------------------
  36 // data
  37 //-----------------------------------------------------------------------------
  38
  39 extern bool   g_blockEventsOnDrag;
  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     wxCommandEvent event( wxEVT_COMMAND_SPINCTRL_UPDATED, win->GetId());
  53     event.SetEventObject( win );
  54     event.SetInt( win->GetValue() );
  55     win->GetEventHandler()->ProcessEvent( event );
  56 }
  57
  58 //-----------------------------------------------------------------------------
  59 // wxSpinCtrl
  60 //-----------------------------------------------------------------------------
  61
  62 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  63
  64 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  65     EVT_CHAR(wxSpinCtrl::OnChar)
  66 END_EVENT_TABLE()
  67
  68 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  69                         const wxString& value,
  70                         const wxPoint& pos,  const wxSize& size,
  71                         long style,
  72                         int min, int max, int initial,
  73                         const wxString& name)
  74 {
  75     m_needParent = TRUE;
  76     m_acceptsFocus = TRUE;
  77
  78     if (!PreCreation( parent, pos, size ) ||
  79         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
  80     {
  81         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
  82         return FALSE;
  83     }
  84
  85     m_oldPos = initial;
  86
  87     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
  88
  89     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
  90
  91     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
  92                               (int)(m_windowStyle & wxSP_WRAP) );
  93
  94     GtkEnableEvents();
  95
  96     m_parent->DoAddChild( this );
  97
  98     PostCreation();
  99
 100     SetFont( parent->GetFont() );
 101
 102     wxSize size_best( DoGetBestSize() );
 103     wxSize new_size( size );
 104     if (new_size.x == -1)
 105         new_size.x = size_best.x;
 106     if (new_size.y == -1)
 107         new_size.y = size_best.y;
 108     if (new_size.y > size_best.y)
 109         new_size.y = size_best.y;
 110     if ((new_size.x != size.x) || (new_size.y != size.y))
 111         SetSize( new_size.x, new_size.y );
 112
 113     SetBackgroundColour( parent->GetBackgroundColour() );
 114
 115     SetValue( value );
 116
 117     Show( TRUE );
 118
 119     return TRUE;
 120 }
 121
 122 void wxSpinCtrl::GtkDisableEvents()
 123 {
 124     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 125                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 126                         (gpointer) this );
 127
 128 }
 129
 130 void wxSpinCtrl::GtkEnableEvents()
 131 {
 132     gtk_signal_connect( GTK_OBJECT (m_adjust),
 133                         "value_changed",
 134                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 135                         (gpointer) this );
 136 }
 137
 138 int wxSpinCtrl::GetMin() const
 139 {
 140     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 141
 142     return (int)ceil(m_adjust->lower);
 143 }
 144
 145 int wxSpinCtrl::GetMax() const
 146 {
 147     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 148
 149     return (int)ceil(m_adjust->upper);
 150 }
 151
 152 int wxSpinCtrl::GetValue() const
 153 {
 154     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 155
 156     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 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         GtkDisableEvents();
 175         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 176         GtkEnableEvents();
 177     }
 178 }
 179
 180 void wxSpinCtrl::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     GtkDisableEvents();
 191     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 192     GtkEnableEvents();
 193 }
 194
 195 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 196 {
 197     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 198
 199     float fmin = (float)minVal;
 200     float fmax = (float)maxVal;
 201
 202     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 203         (fabs(fmax-m_adjust->upper) < sensitivity))
 204     {
 205         return;
 206     }
 207
 208     m_adjust->lower = fmin;
 209     m_adjust->upper = fmax;
 210
 211     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 212
 213     // these two calls are required due to some bug in GTK
 214     Refresh();
 215     SetFocus();
 216 }
 217
 218 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 219 {
 220     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 221
 222     if (event.KeyCode() == WXK_RETURN)
 223     {
 224         wxWindow *top_frame = m_parent;
 225         while (top_frame->GetParent() && !(top_frame->GetParent()->IsTopLevel()))
 226             top_frame = top_frame->GetParent();
 227         GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 228
 229         if (window->default_widget)
 230         {
 231             gtk_widget_activate (window->default_widget);
 232             return;
 233         }
 234     }
 235
 236     event.Skip();
 237 }
 238
 239 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 240 {
 241     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 242 }
 243
 244 void wxSpinCtrl::ApplyWidgetStyle()
 245 {
 246     SetWidgetStyle();
 247     gtk_widget_set_style( m_widget, m_widgetStyle );
 248 }
 249
 250 wxSize wxSpinCtrl::DoGetBestSize() const
 251 {
 252     wxSize ret( wxControl::DoGetBestSize() );
 253     return wxSize(95, ret.y);
 254 }
 255
 256 #endif
 257    // wxUSE_SPINCTRL