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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  12 #pragma implementation "spinctrl.h"
  13 #endif
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include "wx/wxprec.h"
  17
  18 #include "wx/spinctrl.h"
  19
  20 #if wxUSE_SPINCTRL
  21
  22 #include "wx/utils.h"
  23
  24 #include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
  25
  26 #include <math.h>
  27
  28 #include "wx/gtk/private.h"
  29
  30 //-----------------------------------------------------------------------------
  31 // idle system
  32 //-----------------------------------------------------------------------------
  33
  34 extern void wxapp_install_idle_handler();
  35 extern bool g_isIdle;
  36
  37 static const float sensitivity = 0.02;
  38
  39 //-----------------------------------------------------------------------------
  40 // data
  41 //-----------------------------------------------------------------------------
  42
  43 extern bool   g_blockEventsOnDrag;
  44
  45 //-----------------------------------------------------------------------------
  46 // "value_changed"
  47 //-----------------------------------------------------------------------------
  48
  49 static void gtk_spinctrl_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  50 {
  51     if (g_isIdle) wxapp_install_idle_handler();
  52
  53     if (!win->m_hasVMT) return;
  54     if (g_blockEventsOnDrag) return;
  55
  56     wxCommandEvent event( wxEVT_COMMAND_SPINCTRL_UPDATED, win->GetId());
  57     event.SetEventObject( win );
  58
  59     // note that we don't use wxSpinCtrl::GetValue() here because it would
  60     // adjust the value to fit into the control range and this means that we
  61     // would never be able to enter an "invalid" value in the control, even
  62     // temporarily - and trying to enter 10 into the control which accepts the
  63     // values in range 5..50 is then, ummm, quite challenging (hint: you can't
  64     // enter 1!) (VZ)
  65     event.SetInt( (int)ceil(win->m_adjust->value) );
  66     win->GetEventHandler()->ProcessEvent( event );
  67 }
  68
  69 //-----------------------------------------------------------------------------
  70 //  "changed"
  71 //-----------------------------------------------------------------------------
  72
  73 static void
  74 gtk_spinctrl_text_changed_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *win )
  75 {
  76     if (!win->m_hasVMT) return;
  77
  78     if (g_isIdle)
  79         wxapp_install_idle_handler();
  80
  81     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
  82     event.SetEventObject( win );
  83
  84     // see above
  85     event.SetInt( (int)ceil(win->m_adjust->value) );
  86     win->GetEventHandler()->ProcessEvent( event );
  87 }
  88
  89 //-----------------------------------------------------------------------------
  90 // wxSpinCtrl
  91 //-----------------------------------------------------------------------------
  92
  93 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  94
  95 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  96     EVT_CHAR(wxSpinCtrl::OnChar)
  97 END_EVENT_TABLE()
  98
  99 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
 100                         const wxString& value,
 101                         const wxPoint& pos,  const wxSize& size,
 102                         long style,
 103                         int min, int max, int initial,
 104                         const wxString& name)
 105 {
 106     m_needParent = TRUE;
 107     m_acceptsFocus = TRUE;
 108
 109     if (!PreCreation( parent, pos, size ) ||
 110         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 111     {
 112         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 113         return FALSE;
 114     }
 115
 116     m_oldPos = initial;
 117
 118     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 119
 120     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 121
 122     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 123                               (int)(m_windowStyle & wxSP_WRAP) );
 124
 125     GtkEnableEvents();
 126
 127     m_parent->DoAddChild( this );
 128
 129     PostCreation();
 130     InheritAttributes();
 131
 132     wxSize size_best( DoGetBestSize() );
 133     wxSize new_size( size );
 134     if (new_size.x == -1)
 135         new_size.x = size_best.x;
 136     if (new_size.y == -1)
 137         new_size.y = size_best.y;
 138     if (new_size.y > size_best.y)
 139         new_size.y = size_best.y;
 140     if ((new_size.x != size.x) || (new_size.y != size.y))
 141         SetSize( new_size.x, new_size.y );
 142
 143     SetValue( value );
 144
 145     Show( TRUE );
 146
 147     return TRUE;
 148 }
 149
 150 void wxSpinCtrl::GtkDisableEvents()
 151 {
 152     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 153                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 154                         (gpointer) this );
 155
 156     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 157                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 158                         (gpointer) this );
 159 }
 160
 161 void wxSpinCtrl::GtkEnableEvents()
 162 {
 163     gtk_signal_connect( GTK_OBJECT (m_adjust),
 164                         "value_changed",
 165                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 166                         (gpointer) this );
 167
 168     gtk_signal_connect( GTK_OBJECT(m_widget),
 169                         "changed",
 170                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 171                         (gpointer)this);
 172 }
 173
 174 int wxSpinCtrl::GetMin() const
 175 {
 176     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 177
 178     return (int)ceil(m_adjust->lower);
 179 }
 180
 181 int wxSpinCtrl::GetMax() const
 182 {
 183     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 184
 185     return (int)ceil(m_adjust->upper);
 186 }
 187
 188 int wxSpinCtrl::GetValue() const
 189 {
 190     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 191
 192     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 193
 194     return (int)ceil(m_adjust->value);
 195 }
 196
 197 void wxSpinCtrl::SetValue( const wxString& value )
 198 {
 199     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 200
 201     int n;
 202     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 203     {
 204         // a number - set it
 205         SetValue(n);
 206     }
 207     else
 208     {
 209         // invalid number - set text as is (wxMSW compatible)
 210         GtkDisableEvents();
 211         gtk_entry_set_text( GTK_ENTRY(m_widget), wxGTK_CONV( value ) );
 212         GtkEnableEvents();
 213     }
 214 }
 215
 216 void wxSpinCtrl::SetValue( int value )
 217 {
 218     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 219
 220     float fpos = (float)value;
 221     m_oldPos = fpos;
 222     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 223
 224     m_adjust->value = fpos;
 225
 226     GtkDisableEvents();
 227     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 228     GtkEnableEvents();
 229 }
 230
 231 void wxSpinCtrl::SetSelection(long from, long to)
 232 {
 233     // translate from wxWindows conventions to GTK+ ones: (-1, -1) means the
 234     // entire range
 235     if ( from == -1 && to == -1 )
 236     {
 237         from = 0;
 238         to = INT_MAX;
 239     }
 240
 241     gtk_editable_select_region( GTK_EDITABLE(m_widget), (gint)from, (gint)to );
 242 }
 243
 244 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 245 {
 246     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 247
 248     float fmin = (float)minVal;
 249     float fmax = (float)maxVal;
 250
 251     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 252         (fabs(fmax-m_adjust->upper) < sensitivity))
 253     {
 254         return;
 255     }
 256
 257     m_adjust->lower = fmin;
 258     m_adjust->upper = fmax;
 259
 260     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 261
 262     // these two calls are required due to some bug in GTK
 263     Refresh();
 264     SetFocus();
 265 }
 266
 267 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 268 {
 269     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 270
 271     if (event.GetKeyCode() == WXK_RETURN)
 272     {
 273         wxWindow *top_frame = m_parent;
 274         while (top_frame->GetParent() && !(top_frame->GetParent()->IsTopLevel()))
 275             top_frame = top_frame->GetParent();
 276
 277         if ( GTK_IS_WINDOW(top_frame->m_widget) )
 278         {
 279             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 280             if ( window )
 281             {
 282                 GtkWidget *widgetDef = window->default_widget;
 283
 284                 if ( widgetDef && GTK_IS_WINDOW(widgetDef) )
 285                 {
 286                     gtk_widget_activate(widgetDef);
 287                     return;
 288                 }
 289             }
 290         }
 291     }
 292
 293     event.Skip();
 294 }
 295
 296 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 297 {
 298     if (GTK_SPIN_BUTTON(m_widget)->entry.text_area == window) return TRUE;
 299
 300     if (GTK_SPIN_BUTTON(m_widget)->panel == window) return TRUE;
 301
 302     return FALSE;
 303 }
 304
 305 void wxSpinCtrl::ApplyWidgetStyle()
 306 {
 307     SetWidgetStyle();
 308     gtk_widget_set_style( m_widget, m_widgetStyle );
 309 }
 310
 311 wxSize wxSpinCtrl::DoGetBestSize() const
 312 {
 313     wxSize ret( wxControl::DoGetBestSize() );
 314     return wxSize(95, ret.y);
 315 }
 316
 317 #endif
 318    // wxUSE_SPINCTRL