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