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
  81     // see above
  82     event.SetInt( (int)ceil(win->m_adjust->value) );
  83     win->GetEventHandler()->ProcessEvent( event );
  84 }
  85
  86 //-----------------------------------------------------------------------------
  87 // wxSpinCtrl
  88 //-----------------------------------------------------------------------------
  89
  90 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  91
  92 BEGIN_EVENT_TABLE(wxSpinCtrl, wxControl)
  93     EVT_CHAR(wxSpinCtrl::OnChar)
  94 END_EVENT_TABLE()
  95
  96 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  97                         const wxString& value,
  98                         const wxPoint& pos,  const wxSize& size,
  99                         long style,
 100                         int min, int max, int initial,
 101                         const wxString& name)
 102 {
 103     m_needParent = TRUE;
 104     m_acceptsFocus = TRUE;
 105
 106     if (!PreCreation( parent, pos, size ) ||
 107         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 108     {
 109         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 110         return FALSE;
 111     }
 112
 113     m_oldPos = initial;
 114
 115     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 116
 117     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 118
 119     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 120                               (int)(m_windowStyle & wxSP_WRAP) );
 121
 122     GtkEnableEvents();
 123
 124     m_parent->DoAddChild( this );
 125
 126     PostCreation();
 127
 128     SetFont( parent->GetFont() );
 129
 130     wxSize size_best( DoGetBestSize() );
 131     wxSize new_size( size );
 132     if (new_size.x == -1)
 133         new_size.x = size_best.x;
 134     if (new_size.y == -1)
 135         new_size.y = size_best.y;
 136     if (new_size.y > size_best.y)
 137         new_size.y = size_best.y;
 138     if ((new_size.x != size.x) || (new_size.y != size.y))
 139         SetSize( new_size.x, new_size.y );
 140
 141     SetBackgroundColour( parent->GetBackgroundColour() );
 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::SetRange(int minVal, int maxVal)
 232 {
 233     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 234
 235     float fmin = (float)minVal;
 236     float fmax = (float)maxVal;
 237
 238     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 239         (fabs(fmax-m_adjust->upper) < sensitivity))
 240     {
 241         return;
 242     }
 243
 244     m_adjust->lower = fmin;
 245     m_adjust->upper = fmax;
 246
 247     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 248
 249     // these two calls are required due to some bug in GTK
 250     Refresh();
 251     SetFocus();
 252 }
 253
 254 void wxSpinCtrl::OnChar( wxKeyEvent &event )
 255 {
 256     wxCHECK_RET( m_widget != NULL, wxT("invalid spin ctrl") );
 257
 258     if (event.KeyCode() == WXK_RETURN)
 259     {
 260         wxWindow *top_frame = m_parent;
 261         while (top_frame->GetParent() && !(top_frame->GetParent()->IsTopLevel()))
 262             top_frame = top_frame->GetParent();
 263
 264         if ( GTK_IS_WINDOW(top_frame->m_widget) )
 265         {
 266             GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
 267             if ( window )
 268             {
 269                 GtkWidget *widgetDef = window->default_widget;
 270
 271                 if ( widgetDef && GTK_IS_WINDOW(widgetDef) )
 272                 {
 273                     gtk_widget_activate(widgetDef);
 274                     return;
 275                 }
 276             }
 277         }
 278     }
 279
 280     event.Skip();
 281 }
 282
 283 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 284 {
 285     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 286 }
 287
 288 void wxSpinCtrl::ApplyWidgetStyle()
 289 {
 290     SetWidgetStyle();
 291     gtk_widget_set_style( m_widget, m_widgetStyle );
 292 }
 293
 294 wxSize wxSpinCtrl::DoGetBestSize() const
 295 {
 296     wxSize ret( wxControl::DoGetBestSize() );
 297     return wxSize(95, ret.y);
 298 }
 299
 300 #endif
 301    // wxUSE_SPINCTRL