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 "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  22
  23 #include <math.h>
  24
  25 #include "wx/gtk/private.h"
  26
  27 //-----------------------------------------------------------------------------
  28 // idle system
  29 //-----------------------------------------------------------------------------
  30
  31 extern void wxapp_install_idle_handler();
  32 extern bool g_isIdle;
  33
  34 static const float sensitivity = 0.02;
  35
  36 //-----------------------------------------------------------------------------
  37 // data
  38 //-----------------------------------------------------------------------------
  39
  40 extern bool   g_blockEventsOnDrag;
  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     wxCommandEvent event( wxEVT_COMMAND_SPINCTRL_UPDATED, win->GetId());
  54     event.SetEventObject( win );
  55
  56     // note that we don't use wxSpinCtrl::GetValue() here because it would
  57     // adjust the value to fit into the control range and this means that we
  58     // would never be able to enter an "invalid" value in the control, even
  59     // temporarily - and trying to enter 10 into the control which accepts the
  60     // values in range 5..50 is then, ummm, quite challenging (hint: you can't
  61     // enter 1!) (VZ)
  62     event.SetInt( (int)ceil(win->m_adjust->value) );
  63     win->GetEventHandler()->ProcessEvent( event );
  64 }
  65
  66 //-----------------------------------------------------------------------------
  67 //  "changed"
  68 //-----------------------------------------------------------------------------
  69
  70 static void
  71 gtk_spinctrl_text_changed_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  72 {
  73     if (!win->m_hasVMT) return;
  74
  75     if (g_isIdle)
  76         wxapp_install_idle_handler();
  77
  78     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
  79     event.SetEventObject( win );
  80     event.SetInt( win->GetValue() );
  81     win->GetEventHandler()->ProcessEvent( event );
  82 }
  83
  84 //-----------------------------------------------------------------------------
  85 // wxSpinCtrl
  86 //-----------------------------------------------------------------------------
  87
  88 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  89
  90 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  91     EVT_CHAR(wxSpinCtrl::OnChar)
  92 END_EVENT_TABLE()
  93
  94 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  95                         const wxString& value,
  96                         const wxPoint& pos,  const wxSize& size,
  97                         long style,
  98                         int min, int max, int initial,
  99                         const wxString& name)
 100 {
 101     m_needParent = TRUE;
 102     m_acceptsFocus = TRUE;
 103
 104     if (!PreCreation( parent, pos, size ) ||
 105         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 106     {
 107         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 108         return FALSE;
 109     }
 110
 111     m_oldPos = initial;
 112
 113     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 114
 115     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 116
 117     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 118                               (int)(m_windowStyle & wxSP_WRAP) );
 119
 120     GtkEnableEvents();
 121
 122     m_parent->DoAddChild( this );
 123
 124     PostCreation();
 125
 126     SetFont( parent->GetFont() );
 127
 128     wxSize size_best( DoGetBestSize() );
 129     wxSize new_size( size );
 130     if (new_size.x == -1)
 131         new_size.x = size_best.x;
 132     if (new_size.y == -1)
 133         new_size.y = size_best.y;
 134     if (new_size.y > size_best.y)
 135         new_size.y = size_best.y;
 136     if ((new_size.x != size.x) || (new_size.y != size.y))
 137         SetSize( new_size.x, new_size.y );
 138
 139     SetBackgroundColour( parent->GetBackgroundColour() );
 140
 141     SetValue( value );
 142
 143     Show( TRUE );
 144
 145     return TRUE;
 146 }
 147
 148 void wxSpinCtrl::GtkDisableEvents()
 149 {
 150     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 151                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 152                         (gpointer) this );
 153
 154     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 155                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 156                         (gpointer) this );
 157 }
 158
 159 void wxSpinCtrl::GtkEnableEvents()
 160 {
 161     gtk_signal_connect( GTK_OBJECT (m_adjust),
 162                         "value_changed",
 163                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 164                         (gpointer) this );
 165
 166     gtk_signal_connect( GTK_OBJECT(m_widget),
 167                         "changed",
 168                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 169                         (gpointer)this);
 170 }
 171
 172 int wxSpinCtrl::GetMin() const
 173 {
 174     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 175
 176     return (int)ceil(m_adjust->lower);
 177 }
 178
 179 int wxSpinCtrl::GetMax() const
 180 {
 181     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 182
 183     return (int)ceil(m_adjust->upper);
 184 }
 185
 186 int wxSpinCtrl::GetValue() const
 187 {
 188     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 189
 190     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 191
 192     return (int)ceil(m_adjust->value);
 193 }
 194
 195 void wxSpinCtrl::SetValue( const wxString& value )
 196 {
 197     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 198
 199     int n;
 200     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 201     {
 202         // a number - set it
 203         SetValue(n);
 204     }
 205     else
 206     {
 207         // invalid number - set text as is (wxMSW compatible)
 208         GtkDisableEvents();
 209         gtk_entry_set_text( GTK_ENTRY(m_widget), value.mbc_str() );
 210         GtkEnableEvents();
 211     }
 212 }
 213
 214 void wxSpinCtrl::SetValue( int value )
 215 {
 216     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 217
 218     float fpos = (float)value;
 219     m_oldPos = fpos;
 220     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 221
 222     m_adjust->value = fpos;
 223
 224     GtkDisableEvents();
 225     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 226     GtkEnableEvents();
 227 }
 228
 229 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 230 {
 231     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 232
 233     float fmin = (float)minVal;
 234     float fmax = (float)maxVal;
 235
 236     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 237         (fabs(fmax-m_adjust->upper) < sensitivity))
 238     {
 239         return;
 240     }
 241
 242     m_adjust->lower = fmin;
 243     m_adjust->upper = fmax;
 244
 245     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 246
 247     // these two calls are required due to some bug in GTK
 248     Refresh();
 249     SetFocus();
 250 }
 251
 252 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 253 {
 254     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 255
 256     if (event.KeyCode() == WXK_RETURN)
 257     {
 258         wxWindow *top_frame = m_parent;
 259         while (top_frame->GetParent() && !(top_frame->GetParent()->IsTopLevel()))
 260             top_frame = top_frame->GetParent();
 261
 262         if ( GTK_IS_WINDOW(top_frame->m_widget) )
 263         {
 264             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 265             if ( window )
 266             {
 267                 GtkWidget *widgetDef = window->default_widget;
 268
 269                 if ( widgetDef && GTK_IS_WINDOW(widgetDef) )
 270                 {
 271                     gtk_widget_activate(widgetDef);
 272                     return;
 273                 }
 274             }
 275         }
 276     }
 277
 278     event.Skip();
 279 }
 280
 281 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 282 {
 283     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 284 }
 285
 286 void wxSpinCtrl::ApplyWidgetStyle()
 287 {
 288     SetWidgetStyle();
 289     gtk_widget_set_style( m_widget, m_widgetStyle );
 290 }
 291
 292 wxSize wxSpinCtrl::DoGetBestSize() const
 293 {
 294     wxSize ret( wxControl::DoGetBestSize() );
 295     return wxSize(95, ret.y);
 296 }
 297
 298 #endif
 299    // wxUSE_SPINCTRL