src/gtk/slider.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        slider.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // Id:
   7 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "slider.h"
  14 #endif
  15
  16 #include "wx/slider.h"
  17 #include "wx/utils.h"
  18
  19 //-----------------------------------------------------------------------------
  20 // data
  21 //-----------------------------------------------------------------------------
  22
  23 extern bool   g_blockEventsOnDrag;
  24
  25 //-----------------------------------------------------------------------------
  26 // wxSlider
  27 //-----------------------------------------------------------------------------
  28
  29 static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *win )
  30 {
  31   if (!win->HasVMT()) return;
  32   if (g_blockEventsOnDrag) return;
  33
  34   float diff = win->m_adjust->value - win->m_oldPos;
  35   if (fabs(diff) < 0.2) return;
  36
  37   wxEventType command = wxEVT_NULL;
  38
  39   float line_step = win->m_adjust->step_increment;
  40   float page_step = win->m_adjust->page_increment;
  41
  42   if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;
  43   else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP;
  44   else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN;
  45   else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP;
  46   else command = wxEVT_SCROLL_THUMBTRACK;
  47
  48   int value = (int)(win->m_adjust->value+0.5);
  49
  50   int orient = wxHORIZONTAL;
  51   if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxHORIZONTAL;
  52
  53   wxScrollEvent event( command, win->GetId(), value, orient );
  54   event.SetEventObject( win );
  55   win->ProcessEvent( event );
  56
  57   wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
  58   cevent.SetEventObject( win );
  59   win->ProcessEvent( cevent );
  60 }
  61
  62 IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
  63
  64 wxSlider::wxSlider(void)
  65 {
  66 }
  67
  68 wxSlider::~wxSlider(void)
  69 {
  70 }
  71
  72 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  73         int value, int minValue, int maxValue,
  74         const wxPoint& pos, const wxSize& size,
  75         long style, const wxValidator& validator, const wxString& name )
  76 {
  77   m_needParent = TRUE;
  78
  79   PreCreation( parent, id, pos, size, style, name );
  80
  81   SetValidator( validator );
  82
  83   m_oldPos = 0.0;
  84
  85   if (style & wxSL_VERTICAL == wxSL_VERTICAL)
  86     m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
  87   else
  88     m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
  89
  90   m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
  91
  92   gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
  93                       (GtkSignalFunc) gtk_slider_callback, (gpointer) this );
  94   SetRange( minValue, maxValue );
  95   SetValue( value );
  96
  97   PostCreation();
  98
  99   Show( TRUE );
 100
 101   return TRUE;
 102 }
 103
 104 int wxSlider::GetValue(void) const
 105 {
 106   return (int)(m_adjust->value+0.5);
 107 }
 108
 109 void wxSlider::SetValue( int value )
 110 {
 111   float fpos = (float)value;
 112   m_oldPos = fpos;
 113   if (fabs(fpos-m_adjust->value) < 0.2) return;
 114   m_adjust->value = fpos;
 115
 116   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 117 }
 118
 119 void wxSlider::SetRange( int minValue, int maxValue )
 120 {
 121   float fmin = (float)minValue;
 122   float fmax = (float)maxValue;
 123
 124   if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 125       (fabs(fmax-m_adjust->upper) < 0.2))
 126       return;
 127
 128   m_adjust->lower = fmin;
 129   m_adjust->upper = fmax;
 130
 131   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 132 }
 133
 134 int wxSlider::GetMin(void) const
 135 {
 136   return (int)(m_adjust->lower+0.5);
 137 }
 138
 139 int wxSlider::GetMax(void) const
 140 {
 141   return (int)(m_adjust->upper+0.5);
 142 }
 143
 144 void wxSlider::SetPageSize( int pageSize )
 145 {
 146   float fpage = (float)pageSize;
 147
 148   if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 149
 150   m_adjust->page_increment = fpage;
 151
 152   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 153 }
 154
 155 int wxSlider::GetPageSize(void) const
 156 {
 157   return (int)(m_adjust->page_increment+0.5);
 158 }
 159
 160 void wxSlider::SetThumbLength( int len )
 161 {
 162   float flen = (float)len;
 163
 164   if (fabs(flen-m_adjust->page_size) < 0.2) return;
 165
 166   m_adjust->page_size = flen;
 167
 168   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 169 }
 170
 171 int wxSlider::GetThumbLength(void) const
 172 {
 173   return (int)(m_adjust->page_size+0.5);
 174 }
 175
 176 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 177 {
 178 }
 179
 180 int wxSlider::GetLineSize(void) const
 181 {
 182   return 0;
 183 }
 184
 185 // not supported in wxGTK (and GTK)
 186
 187 void wxSlider::GetSize( int *x, int *y ) const
 188 {
 189   wxWindow::GetSize( x, y );
 190 }
 191
 192 void wxSlider::SetSize( int x, int y, int width, int height, int sizeFlags )
 193 {
 194   wxWindow::SetSize( x, y, width, height, sizeFlags );
 195 }
 196
 197 void wxSlider::GetPosition( int *x, int *y ) const
 198 {
 199   wxWindow::GetPosition( x, y );
 200 }
 201
 202 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 203 {
 204 }
 205
 206 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 207 {
 208 }
 209
 210 int wxSlider::GetTickFreq(void) const
 211 {
 212   return 0;
 213 }
 214
 215 void wxSlider::ClearTicks(void)
 216 {
 217 }
 218
 219 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 220 {
 221 }
 222
 223 int wxSlider::GetSelEnd(void) const
 224 {
 225   return 0;
 226 }
 227
 228 int wxSlider::GetSelStart(void) const
 229 {
 230   return 0;
 231 }
 232
 233 void wxSlider::ClearSel(void)
 234 {
 235 }
 236