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
 131     SetFont( parent->GetFont() );
 132
 133     wxSize size_best( DoGetBestSize() );
 134     wxSize new_size( size );
 135     if (new_size.x == -1)
 136         new_size.x = size_best.x;
 137     if (new_size.y == -1)
 138         new_size.y = size_best.y;
 139     if (new_size.y > size_best.y)
 140         new_size.y = size_best.y;
 141     if ((new_size.x != size.x) || (new_size.y != size.y))
 142         SetSize( new_size.x, new_size.y );
 143
 144     SetBackgroundColour( parent->GetBackgroundColour() );
 145
 146     SetValue( value );
 147
 148     Show( TRUE );
 149
 150     return TRUE;
 151 }
 152
 153 void wxSpinCtrl::GtkDisableEvents()
 154 {
 155     gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
 156                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 157                         (gpointer) this );
 158
 159     gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
 160                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 161                         (gpointer) this );
 162 }
 163
 164 void wxSpinCtrl::GtkEnableEvents()
 165 {
 166     gtk_signal_connect( GTK_OBJECT (m_adjust),
 167                         "value_changed",
 168                         GTK_SIGNAL_FUNC(gtk_spinctrl_callback),
 169                         (gpointer) this );
 170
 171     gtk_signal_connect( GTK_OBJECT(m_widget),
 172                         "changed",
 173                         GTK_SIGNAL_FUNC(gtk_spinctrl_text_changed_callback),
 174                         (gpointer)this);
 175 }
 176
 177 int wxSpinCtrl::GetMin() const
 178 {
 179     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 180
 181     return (int)ceil(m_adjust->lower);
 182 }
 183
 184 int wxSpinCtrl::GetMax() const
 185 {
 186     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 187
 188     return (int)ceil(m_adjust->upper);
 189 }
 190
 191 int wxSpinCtrl::GetValue() const
 192 {
 193     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 194
 195     gtk_spin_button_update( GTK_SPIN_BUTTON(m_widget) );
 196
 197     return (int)ceil(m_adjust->value);
 198 }
 199
 200 void wxSpinCtrl::SetValue( const wxString& value )
 201 {
 202     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 203
 204     int n;
 205     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 206     {
 207         // a number - set it
 208         SetValue(n);
 209     }
 210     else
 211     {
 212         // invalid number - set text as is (wxMSW compatible)
 213         GtkDisableEvents();
 214         gtk_entry_set_text( GTK_ENTRY(m_widget), wxGTK_CONV( value ) );
 215         GtkEnableEvents();
 216     }
 217 }
 218
 219 void wxSpinCtrl::SetValue( int value )
 220 {
 221     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 222
 223     float fpos = (float)value;
 224     m_oldPos = fpos;
 225     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 226
 227     m_adjust->value = fpos;
 228
 229     GtkDisableEvents();
 230     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 231     GtkEnableEvents();
 232 }
 233
 234 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 235 {
 236     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 237
 238     float fmin = (float)minVal;
 239     float fmax = (float)maxVal;
 240
 241     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 242         (fabs(fmax-m_adjust->upper) < sensitivity))
 243     {
 244         return;
 245     }
 246
 247     m_adjust->lower = fmin;
 248     m_adjust->upper = fmax;
 249
 250     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 251
 252     // these two calls are required due to some bug in GTK
 253     Refresh();
 254     SetFocus();
 255 }
 256
 257 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 258 {
 259     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 260
 261     if (event.GetKeyCode() == WXK_RETURN)
 262     {
 263         wxWindow *top_frame = m_parent;
 264         while (top_frame->GetParent() && !(top_frame->GetParent()->IsTopLevel()))
 265             top_frame = top_frame->GetParent();
 266
 267         if ( GTK_IS_WINDOW(top_frame->m_widget) )
 268         {
 269             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 270             if ( window )
 271             {
 272                 GtkWidget *widgetDef = window->default_widget;
 273
 274                 if ( widgetDef && GTK_IS_WINDOW(widgetDef) )
 275                 {
 276                     gtk_widget_activate(widgetDef);
 277                     return;
 278                 }
 279             }
 280         }
 281     }
 282
 283     event.Skip();
 284 }
 285
 286 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 287 {
 288     if (GTK_SPIN_BUTTON(m_widget)->entry.text_area == window) return TRUE;
 289
 290     if (GTK_SPIN_BUTTON(m_widget)->panel == window) return TRUE;
 291
 292     return FALSE;
 293 }
 294
 295 void wxSpinCtrl::ApplyWidgetStyle()
 296 {
 297     SetWidgetStyle();
 298     gtk_widget_set_style( m_widget, m_widgetStyle );
 299 }
 300
 301 wxSize wxSpinCtrl::DoGetBestSize() const
 302 {
 303     wxSize ret( wxControl::DoGetBestSize() );
 304     return wxSize(95, ret.y);
 305 }
 306
 307 #endif
 308    // wxUSE_SPINCTRL