src/gtk/spinbutt.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifdef __GNUG__
  12 #pragma implementation "spinbutt.h"
  13 #endif
  14
  15 #include "wx/spinbutt.h"
  16
  17 #ifdef wxUSE_SPINBTN
  18
  19 #include "wx/utils.h"
  20
  21 #include <math.h>
  22
  23 #include <gdk/gdk.h>
  24 #include <gtk/gtk.h>
  25
  26 //-----------------------------------------------------------------------------
  27 // idle system
  28 //-----------------------------------------------------------------------------
  29
  30 extern void wxapp_install_idle_handler();
  31 extern bool g_isIdle;
  32
  33 //-----------------------------------------------------------------------------
  34 // data
  35 //-----------------------------------------------------------------------------
  36
  37 extern bool   g_blockEventsOnDrag;
  38
  39 static const float sensitivity = 0.02;
  40
  41 //-----------------------------------------------------------------------------
  42 // "value_changed"
  43 //-----------------------------------------------------------------------------
  44
  45 static void gtk_spinbutt_callback( GtkWidget *WXUNUSED(widget), wxSpinButton *win )
  46 {
  47     if (g_isIdle) wxapp_install_idle_handler();
  48
  49     if (!win->m_hasVMT) return;
  50     if (g_blockEventsOnDrag) return;
  51
  52     float diff = win->m_adjust->value - win->m_oldPos;
  53     if (fabs(diff) < sensitivity) return;
  54     win->m_oldPos = win->m_adjust->value;
  55
  56     wxEventType command = wxEVT_NULL;
  57
  58     float line_step = win->m_adjust->step_increment;
  59
  60     if (fabs(diff-line_step) < sensitivity) command = wxEVT_SCROLL_LINEDOWN;
  61     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  62     else command = wxEVT_SCROLL_THUMBTRACK;
  63
  64     int value = (int)ceil(win->m_adjust->value);
  65
  66     wxSpinEvent event( command, win->GetId());
  67     event.SetPosition( value );
  68     event.SetEventObject( win );
  69     win->GetEventHandler()->ProcessEvent( event );
  70
  71     /* always send a thumbtrack event */
  72     if (command != wxEVT_SCROLL_THUMBTRACK)
  73     {
  74         command = wxEVT_SCROLL_THUMBTRACK;
  75         wxSpinEvent event2( command, win->GetId());
  76         event2.SetPosition( value );
  77         event2.SetEventObject( win );
  78         win->GetEventHandler()->ProcessEvent( event2 );
  79     }
  80 }
  81
  82 //-----------------------------------------------------------------------------
  83 // wxSpinButton
  84 //-----------------------------------------------------------------------------
  85
  86 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton,wxControl)
  87 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxScrollEvent);
  88
  89 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
  90     EVT_SIZE(wxSpinButton::OnSize)
  91 END_EVENT_TABLE()
  92
  93 bool wxSpinButton::Create(wxWindow *parent,
  94                           wxWindowID id,
  95                           const wxPoint& pos,
  96                           const wxSize& size,
  97                           long style,
  98                           const wxString& name)
  99 {
 100     m_needParent = TRUE;
 101
 102     wxSize new_size = size,
 103            sizeBest = DoGetBestSize();
 104     new_size.x = sizeBest.x;            // override width always
 105     if (new_size.y == -1)
 106         new_size.y = sizeBest.y;
 107
 108     if (!PreCreation( parent, pos, new_size ) ||
 109         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 110     {
 111         wxFAIL_MSG( wxT("wxXX creation failed") );
 112         return FALSE;
 113     }
 114
 115     m_oldPos = 0.0;
 116
 117     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 118
 119     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 120
 121     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 122                               (int)(m_windowStyle & wxSP_WRAP) );
 123
 124     gtk_signal_connect( GTK_OBJECT (m_adjust),
 125                         "value_changed",
 126                         (GtkSignalFunc) gtk_spinbutt_callback,
 127                         (gpointer) this );
 128
 129     m_parent->DoAddChild( this );
 130
 131     PostCreation();
 132
 133     SetBackgroundColour( parent->GetBackgroundColour() );
 134
 135     Show( TRUE );
 136
 137     return TRUE;
 138 }
 139
 140 int wxSpinButton::GetMin() const
 141 {
 142     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 143
 144     return (int)ceil(m_adjust->lower);
 145 }
 146
 147 int wxSpinButton::GetMax() const
 148 {
 149     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 150
 151     return (int)ceil(m_adjust->upper);
 152 }
 153
 154 int wxSpinButton::GetValue() const
 155 {
 156     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 157
 158     return (int)ceil(m_adjust->value);
 159 }
 160
 161 void wxSpinButton::SetValue( int value )
 162 {
 163     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 164
 165     float fpos = (float)value;
 166     m_oldPos = fpos;
 167     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 168
 169     m_adjust->value = fpos;
 170
 171     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 172 }
 173
 174 void wxSpinButton::SetRange(int minVal, int maxVal)
 175 {
 176     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 177
 178     float fmin = (float)minVal;
 179     float fmax = (float)maxVal;
 180
 181     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 182         (fabs(fmax-m_adjust->upper) < sensitivity))
 183     {
 184         return;
 185     }
 186
 187     m_adjust->lower = fmin;
 188     m_adjust->upper = fmax;
 189
 190     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 191
 192     // these two calls are required due to some bug in GTK
 193     Refresh();
 194     SetFocus();
 195 }
 196
 197 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 198 {
 199     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 200
 201     m_width = DoGetBestSize().x;
 202     gtk_widget_set_usize( m_widget, m_width, m_height );
 203 }
 204
 205 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 206 {
 207     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 208 }
 209
 210 void wxSpinButton::ApplyWidgetStyle()
 211 {
 212     SetWidgetStyle();
 213     gtk_widget_set_style( m_widget, m_widgetStyle );
 214 }
 215
 216 wxSize wxSpinButton::DoGetBestSize() const
 217 {
 218     return wxSize(15, 26);
 219 }
 220
 221 #endif