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 #ifdef wxUSE_SPINBTN
  18
  19 #include "wx/utils.h"
  20 #include "wx/spinbutt.h"
  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_spinctrl_callback( GtkWidget *WXUNUSED(widget), wxSpinCtrl *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 // wxSpinCtrl
  84 //-----------------------------------------------------------------------------
  85
  86 IMPLEMENT_DYNAMIC_CLASS(wxSpinCtrl,wxControl)
  87
  88 bool wxSpinCtrl::Create(wxWindow *parent, wxWindowID id,
  89                         const wxString& value,
  90                         const wxPoint& pos,  const wxSize& size,
  91                         long style,
  92                         int min, int max, int initial,
  93                         const wxString& name)
  94 {
  95     m_needParent = TRUE;
  96
  97     wxSize new_size = size;
  98     if (new_size.y == -1)
  99         new_size.y = 26;
 100
 101     if (!PreCreation( parent, pos, new_size ) ||
 102         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 103     {
 104         wxFAIL_MSG( wxT("wxSpinCtrl creation failed") );
 105         return FALSE;
 106     }
 107
 108     m_oldPos = initial;
 109
 110     m_adjust = (GtkAdjustment*) gtk_adjustment_new( initial, min, max, 1.0, 5.0, 0.0);
 111
 112     m_widget = gtk_spin_button_new( m_adjust, 1, 0 );
 113
 114     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget), (m_windowStyle & wxSP_WRAP) );
 115
 116     gtk_signal_connect( GTK_OBJECT (m_adjust),
 117                         "value_changed",
 118                         (GtkSignalFunc) gtk_spinctrl_callback,
 119                         (gpointer) this );
 120
 121     m_parent->DoAddChild( this );
 122
 123     PostCreation();
 124
 125     SetBackgroundColour( parent->GetBackgroundColour() );
 126
 127     SetValue( value );
 128
 129     Show( TRUE );
 130
 131     return TRUE;
 132 }
 133
 134 int wxSpinCtrl::GetMin() const
 135 {
 136     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 137
 138     return (int)ceil(m_adjust->lower);
 139 }
 140
 141 int wxSpinCtrl::GetMax() const
 142 {
 143     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 144
 145     return (int)ceil(m_adjust->upper);
 146 }
 147
 148 int wxSpinCtrl::GetValue() const
 149 {
 150     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 151
 152     return (int)ceil(m_adjust->value);
 153 }
 154
 155 void wxSpinCtrl::SetValue( const wxString& value )
 156 {
 157     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 158
 159     int n;
 160     if ( (wxSscanf(value, wxT("%d"), &n) == 1) )
 161     {
 162         // a number - set it
 163         SetValue(n);
 164     }
 165     else
 166     {
 167         // invalid number - set text as is (wxMSW compatible)
 168         gtk_entry_set_text( GTK_ENTRY(m_widget), value.c_str() );
 169     }
 170 }
 171
 172 void wxSpinCtrl::SetValue( int value )
 173 {
 174     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 175
 176     float fpos = (float)value;
 177     m_oldPos = fpos;
 178     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 179
 180     m_adjust->value = fpos;
 181
 182     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 183 }
 184
 185 void wxSpinCtrl::SetRange(int minVal, int maxVal)
 186 {
 187     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 188
 189     float fmin = (float)minVal;
 190     float fmax = (float)maxVal;
 191
 192     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 193         (fabs(fmax-m_adjust->upper) < sensitivity))
 194     {
 195         return;
 196     }
 197
 198     m_adjust->lower = fmin;
 199     m_adjust->upper = fmax;
 200
 201     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 202
 203     // these two calls are required due to some bug in GTK
 204     Refresh();
 205     SetFocus();
 206 }
 207
 208 bool wxSpinCtrl::IsOwnGtkWindow( GdkWindow *window )
 209 {
 210     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 211 }
 212
 213 void wxSpinCtrl::ApplyWidgetStyle()
 214 {
 215     SetWidgetStyle();
 216     gtk_widget_set_style( m_widget, m_widgetStyle );
 217 }
 218
 219 #endif