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 #include <math.h>
  21
  22 #include "gdk/gdk.h"
  23 #include "gtk/gtk.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // idle system
  27 //-----------------------------------------------------------------------------
  28
  29 extern void wxapp_install_idle_handler();
  30 extern bool g_isIdle;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37
  38 static const float sensitivity = 0.2;
  39
  40 //-----------------------------------------------------------------------------
  41 // "value_changed"
  42 //-----------------------------------------------------------------------------
  43
  44 static void gtk_spinbutt_callback( GtkWidget *WXUNUSED(widget), wxSpinButton *win )
  45 {
  46     if (g_isIdle) wxapp_install_idle_handler();
  47
  48     if (!win->m_hasVMT) return;
  49     if (g_blockEventsOnDrag) return;
  50
  51     float diff = win->m_adjust->value - win->m_oldPos;
  52     if (fabs(diff) < sensitivity) return;
  53     win->m_oldPos = win->m_adjust->value;
  54
  55     wxEventType command = wxEVT_NULL;
  56
  57     float line_step = win->m_adjust->step_increment;
  58
  59     if (fabs(diff-line_step) < sensitivity) command = wxEVT_SCROLL_LINEDOWN;
  60     else if (fabs(diff+line_step) < sensitivity) command = wxEVT_SCROLL_LINEUP;
  61     else command = wxEVT_SCROLL_THUMBTRACK;
  62
  63     int value = (int)ceil(win->m_adjust->value);
  64
  65     wxSpinEvent event( command, win->GetId());
  66     event.SetPosition( value );
  67     event.SetEventObject( win );
  68     win->GetEventHandler()->ProcessEvent( event );
  69
  70     /* always send a thumbtrack event */
  71     if (command != wxEVT_SCROLL_THUMBTRACK)
  72     {
  73         command = wxEVT_SCROLL_THUMBTRACK;
  74         wxSpinEvent event2( command, win->GetId());
  75         event2.SetPosition( value );
  76         event2.SetEventObject( win );
  77         win->GetEventHandler()->ProcessEvent( event2 );
  78     }
  79 }
  80
  81 //-----------------------------------------------------------------------------
  82 // wxSpinButton
  83 //-----------------------------------------------------------------------------
  84
  85 IMPLEMENT_DYNAMIC_CLASS(wxSpinButton,wxControl)
  86 IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxScrollEvent);
  87
  88 BEGIN_EVENT_TABLE(wxSpinButton, wxControl)
  89     EVT_SIZE(wxSpinButton::OnSize)
  90 END_EVENT_TABLE()
  91
  92 bool wxSpinButton::Create(wxWindow *parent,
  93                           wxWindowID id,
  94                           const wxPoint& pos,
  95                           const wxSize& size,
  96                           long style,
  97                           const wxString& name)
  98 {
  99     m_needParent = TRUE;
 100
 101     wxSize new_size = size;
 102     new_size.x = 15;
 103     if (new_size.y == -1)
 104         new_size.y = 30;
 105
 106     if (!PreCreation( parent, pos, new_size ) ||
 107         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 108     {
 109         wxFAIL_MSG( T("wxXX creation failed") );
 110         return FALSE;
 111     }
 112
 113     m_oldPos = 0.0;
 114
 115     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 116
 117     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 118
 119     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget), (m_windowStyle & wxSP_WRAP) );
 120
 121     gtk_signal_connect( GTK_OBJECT (m_adjust),
 122                         "value_changed",
 123                         (GtkSignalFunc) gtk_spinbutt_callback,
 124                         (gpointer) this );
 125
 126     m_parent->DoAddChild( this );
 127
 128     PostCreation();
 129
 130     SetBackgroundColour( parent->GetBackgroundColour() );
 131
 132     Show( TRUE );
 133
 134     return TRUE;
 135 }
 136
 137 wxSpinButton::~wxSpinButton()
 138 {
 139 }
 140
 141 int wxSpinButton::GetMin() const
 142 {
 143     wxCHECK_MSG( (m_widget != NULL), 0, T("invalid spin button") );
 144
 145     return (int)ceil(m_adjust->lower);
 146 }
 147
 148 int wxSpinButton::GetMax() const
 149 {
 150     wxCHECK_MSG( (m_widget != NULL), 0, T("invalid spin button") );
 151
 152     return (int)ceil(m_adjust->upper);
 153 }
 154
 155 int wxSpinButton::GetValue() const
 156 {
 157     wxCHECK_MSG( (m_widget != NULL), 0, T("invalid spin button") );
 158
 159     return (int)ceil(m_adjust->value);
 160 }
 161
 162 void wxSpinButton::SetValue( int value )
 163 {
 164     wxCHECK_RET( (m_widget != NULL), T("invalid spin button") );
 165
 166     float fpos = (float)value;
 167     m_oldPos = fpos;
 168     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 169
 170     m_adjust->value = fpos;
 171
 172     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 173 }
 174
 175 void wxSpinButton::SetRange(int minVal, int maxVal)
 176 {
 177     wxCHECK_RET( (m_widget != NULL), T("invalid spin button") );
 178
 179     float fmin = (float)minVal;
 180     float fmax = (float)maxVal;
 181
 182     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 183         (fabs(fmax-m_adjust->upper) < sensitivity))
 184     {
 185         return;
 186     }
 187
 188     m_adjust->lower = fmin;
 189     m_adjust->upper = fmax;
 190
 191     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 192
 193     // these two calls are required due to some bug in GTK
 194     Refresh();
 195     SetFocus();
 196 }
 197
 198 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 199 {
 200     wxCHECK_RET( (m_widget != NULL), T("invalid spin button") );
 201
 202     m_width = 15;
 203     gtk_widget_set_usize( m_widget, m_width, m_height );
 204 }
 205
 206 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 207 {
 208     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 209 }
 210
 211 void wxSpinButton::ApplyWidgetStyle()
 212 {
 213     SetWidgetStyle();
 214     gtk_widget_set_style( m_widget, m_widgetStyle );
 215 }
 216
 217 #endif