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->GetEventHandler()->ProcessEvent( 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->GetEventHandler()->ProcessEvent(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
 111     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 112                               (int)(m_windowStyle & wxSP_WRAP) );
 113
 114     g_signal_connect_after(
 115         m_widget, "value_changed", G_CALLBACK(gtk_value_changed), this);
 116
 117     m_parent->DoAddChild( this );
 118
 119     PostCreation(new_size);
 120
 121     return true;
 122 }
 123
 124 int wxSpinButton::GetMin() const
 125 {
 126     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 127
 128     double min;
 129     gtk_spin_button_get_range((GtkSpinButton*)m_widget, &min, NULL);
 130     return int(min);
 131 }
 132
 133 int wxSpinButton::GetMax() const
 134 {
 135     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 136
 137     double max;
 138     gtk_spin_button_get_range((GtkSpinButton*)m_widget, NULL, &max);
 139     return int(max);
 140 }
 141
 142 int wxSpinButton::GetValue() const
 143 {
 144     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 145
 146     return m_pos;
 147 }
 148
 149 void wxSpinButton::SetValue( int value )
 150 {
 151     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 152
 153     GtkDisableEvents();
 154     gtk_spin_button_set_value((GtkSpinButton*)m_widget, value);
 155     m_pos = int(gtk_spin_button_get_value((GtkSpinButton*)m_widget));
 156     GtkEnableEvents();
 157 }
 158
 159 void wxSpinButton::SetRange(int minVal, int maxVal)
 160 {
 161     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 162
 163     GtkDisableEvents();
 164     gtk_spin_button_set_range((GtkSpinButton*)m_widget, minVal, maxVal);
 165     m_pos = int(gtk_spin_button_get_value((GtkSpinButton*)m_widget));
 166     GtkEnableEvents();
 167 }
 168
 169 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 170 {
 171     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 172
 173     m_width = DoGetBestSize().x;
 174     gtk_widget_set_size_request( m_widget, m_width, m_height );
 175 }
 176
 177 void wxSpinButton::GtkDisableEvents() const
 178 {
 179     g_signal_handlers_block_by_func(m_widget,
 180         (gpointer)gtk_value_changed, (void*) this);
 181 }
 182
 183 void wxSpinButton::GtkEnableEvents() const
 184 {
 185     g_signal_handlers_unblock_by_func(m_widget,
 186         (gpointer)gtk_value_changed, (void*) this);
 187 }
 188
 189 GdkWindow *wxSpinButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 190 {
 191     return GTK_SPIN_BUTTON(m_widget)->panel;
 192 }
 193
 194 wxSize wxSpinButton::DoGetBestSize() const
 195 {
 196     wxSize best(15, 26); // FIXME
 197     CacheBestSize(best);
 198     return best;
 199 }
 200
 201 // static
 202 wxVisualAttributes
 203 wxSpinButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 204 {
 205     // TODO: overload to accept functions like gtk_spin_button_new?
 206     // Until then use a similar type
 207     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 208 }
 209
 210 #endif