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     new_size.x = 15;
 104     if (new_size.y == -1)
 105         new_size.y = 26;
 106
 107     if (!PreCreation( parent, pos, new_size ) ||
 108         !CreateBase( parent, id, pos, new_size, style, wxDefaultValidator, name ))
 109     {
 110         wxFAIL_MSG( wxT("wxXX creation failed") );
 111         return FALSE;
 112     }
 113
 114     m_oldPos = 0.0;
 115
 116     m_adjust = (GtkAdjustment*) gtk_adjustment_new( 0.0, 0.0, 100.0, 1.0, 5.0, 0.0);
 117
 118     m_widget = gtk_spin_button_new( m_adjust, 0, 0 );
 119
 120     gtk_spin_button_set_wrap( GTK_SPIN_BUTTON(m_widget),
 121                               (int)(m_windowStyle & wxSP_WRAP) );
 122
 123     gtk_signal_connect( GTK_OBJECT (m_adjust),
 124                         "value_changed",
 125                         (GtkSignalFunc) gtk_spinbutt_callback,
 126                         (gpointer) this );
 127
 128     m_parent->DoAddChild( this );
 129
 130     PostCreation();
 131
 132     SetBackgroundColour( parent->GetBackgroundColour() );
 133
 134     Show( TRUE );
 135
 136     return TRUE;
 137 }
 138
 139 int wxSpinButton::GetMin() const
 140 {
 141     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 142
 143     return (int)ceil(m_adjust->lower);
 144 }
 145
 146 int wxSpinButton::GetMax() const
 147 {
 148     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 149
 150     return (int)ceil(m_adjust->upper);
 151 }
 152
 153 int wxSpinButton::GetValue() const
 154 {
 155     wxCHECK_MSG( (m_widget != NULL), 0, wxT("invalid spin button") );
 156
 157     return (int)ceil(m_adjust->value);
 158 }
 159
 160 void wxSpinButton::SetValue( int value )
 161 {
 162     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 163
 164     float fpos = (float)value;
 165     m_oldPos = fpos;
 166     if (fabs(fpos-m_adjust->value) < sensitivity) return;
 167
 168     m_adjust->value = fpos;
 169
 170     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 171 }
 172
 173 void wxSpinButton::SetRange(int minVal, int maxVal)
 174 {
 175     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 176
 177     float fmin = (float)minVal;
 178     float fmax = (float)maxVal;
 179
 180     if ((fabs(fmin-m_adjust->lower) < sensitivity) &&
 181         (fabs(fmax-m_adjust->upper) < sensitivity))
 182     {
 183         return;
 184     }
 185
 186     m_adjust->lower = fmin;
 187     m_adjust->upper = fmax;
 188
 189     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 190
 191     // these two calls are required due to some bug in GTK
 192     Refresh();
 193     SetFocus();
 194 }
 195
 196 void wxSpinButton::OnSize( wxSizeEvent &WXUNUSED(event) )
 197 {
 198     wxCHECK_RET( (m_widget != NULL), wxT("invalid spin button") );
 199
 200     m_width = 15;
 201     gtk_widget_set_usize( m_widget, m_width, m_height );
 202 }
 203
 204 bool wxSpinButton::IsOwnGtkWindow( GdkWindow *window )
 205 {
 206     return GTK_SPIN_BUTTON(m_widget)->panel == window;
 207 }
 208
 209 void wxSpinButton::ApplyWidgetStyle()
 210 {
 211     SetWidgetStyle();
 212     gtk_widget_set_style( m_widget, m_widgetStyle );
 213 }
 214
 215 #endif