src/gtk/spinbutt.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/spinbutt.cpp
   3 // Purpose:     wxSpinButton
   4 // Author:      Robert
   5 // Modified by:
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_SPINBTN
  15
  16 #include "wx/spinbutt.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/utils.h"
  20 #endif
  21
  22 #include <gtk/gtk.h>
  23
  24 //-----------------------------------------------------------------------------
  25 // data
  26 //-----------------------------------------------------------------------------
  27
  28 extern bool   g_blockEventsOnDrag;
  29
  30 //-----------------------------------------------------------------------------
  31 // "value_changed"
  32 //-----------------------------------------------------------------------------
  33
  34 extern "C" {
  35 static void
  36 gtk_value_changed(GtkSpinButton* spinbutton, wxSpinButton* win)
  37 {
  38     const double value = gtk_spin_button_get_value(spinbutton);
  39     const int pos = int(value);
  40     const int oldPos = win->m_pos;
  41     if (!win->m_hasVMT || g_blockEventsOnDrag || pos == oldPos)
  42     {
  43         win->m_pos = pos;
  44         return;
  45     }
  46
  47     wxSpinEvent event(pos > oldPos ? wxEVT_SCROLL_LINEUP : wxEVT_SCROLL_LINEDOWN, win->GetId());
  48     event.SetPosition(pos);
  49     event.SetEventObject(win);
  50
  51     if ((win->HandleWindowEvent( event )) &&
  52         !event.IsAllowed() )
  53     {
  54         /* program has vetoed */
  55         // this will cause another "value_changed" signal,
  56         // but because pos == oldPos nothing will happen
  57         gtk_spin_button_set_value(spinbutton, oldPos);
  58         return;
  59     }
  60
  61     win->m_pos = pos;
  62
  63     /* always send a thumbtrack event */
  64     wxSpinEvent event2(wxEVT_SCROLL_THUMBTRACK, win->GetId());
  65     event2.SetPosition(pos);
  66     event2.SetEventObject(win);
  67     win->HandleWindowEvent(event2);
  68 }
  69 }
  70
  71 //-----------------------------------------------------------------------------
  72 // wxSpinButton
  73 //-----------------------------------------------------------------------------
  74
  75 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton,wxControl)
  76 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxNotifyEvent)
  77
  78 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
  79     EVT_SIZE(wxSpinButton::OnSize)
  80 END_EVENT_TABLE()
  81
  82 wxSpinButton::wxSpinButton()
  83 {
  84     m_pos = 0;
  85 }
  86
  87 bool wxSpinButton::Create(wxWindow *parent,
  88                           wxWindowID id,
  89                           const wxPoint& pos,
  90                           const wxSize& size,
  91                           long style,
  92                           const wxString& name)
  93 {
  94     wxSize new_size = size,
  95            sizeBest = DoGetBestSize();
  96     new_size.x = sizeBest.x;            // override width always
  97     if (new_size.y == -1)
  98         new_size.y = sizeBest.y;
  99
 100     if (!PreCreation( parent, pos, new_size ) ||
 101         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 102     {
 103         wxFAIL_MSG( wxT("wxSpinButton creation failed") );
 104         return false;
 105     }
 106
 107     m_pos = 0;
 108
 109     m_widget = gtk_spin_button_new_with_range(0, 100, 1);
 110     g_object_ref(m_widget);
 111
 112     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 113                               (int)(m_windowStyle & wxSP_WRAP) );
 114
 115     g_signal_connect_after(
 116         m_widget, "value_changed", G_CALLBACK(gtk_value_changed), this);
 117
 118     m_parent->DoAddChild( this );
 119
 120     PostCreation(new_size);
 121
 122     return true;
 123 }
 124
 125 int wxSpinButton::GetMin() const
 126 {
 127     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 128
 129     double min;
 130     gtk_spin_button_get_range((GtkSpinButton*)m_widget, &min, NULL);
 131     return int(min);
 132 }
 133
 134 int wxSpinButton::GetMax() const
 135 {
 136     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 137
 138     double max;
 139     gtk_spin_button_get_range((GtkSpinButton*)m_widget, NULL, &max);
 140     return int(max);
 141 }
 142
 143 int wxSpinButton::GetValue() const
 144 {
 145     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 146
 147     return m_pos;
 148 }
 149
 150 void wxSpinButton::SetValue( int value )
 151 {
 152     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 153
 154     GtkDisableEvents();
 155     gtk_spin_button_set_value((GtkSpinButton*)m_widget, value);
 156     m_pos = int(gtk_spin_button_get_value((GtkSpinButton*)m_widget));
 157     GtkEnableEvents();
 158 }
 159
 160 void wxSpinButton::SetRange(int minVal, int maxVal)
 161 {
 162     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 163
 164     GtkDisableEvents();
 165     gtk_spin_button_set_range((GtkSpinButton*)m_widget, minVal, maxVal);
 166     m_pos = int(gtk_spin_button_get_value((GtkSpinButton*)m_widget));
 167     GtkEnableEvents();
 168 }
 169
 170 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 171 {
 172     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 173
 174     m_width = DoGetBestSize().x;
 175     gtk_widget_set_size_request( m_widget, m_width, m_height );
 176 }
 177
 178 void wxSpinButton::GtkDisableEvents() const
 179 {
 180     g_signal_handlers_block_by_func(m_widget,
 181         (gpointer)gtk_value_changed, (void*) this);
 182 }
 183
 184 void wxSpinButton::GtkEnableEvents() const
 185 {
 186     g_signal_handlers_unblock_by_func(m_widget,
 187         (gpointer)gtk_value_changed, (void*) this);
 188 }
 189
 190 GdkWindow *wxSpinButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 191 {
 192     return GTK_SPIN_BUTTON(m_widget)->panel;
 193 }
 194
 195 wxSize wxSpinButton::DoGetBestSize() const
 196 {
 197     wxSize best(15, 26); // FIXME
 198     CacheBestSize(best);
 199     return best;
 200 }
 201
 202 // static
 203 wxVisualAttributes
 204 wxSpinButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 205 {
 206     // TODO: overload to accept functions like gtk_spin_button_new?
 207     // Until then use a similar type
 208     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 209 }
 210
 211 #endif