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( wxWindow *parent, wxWindowID id,
  69         int value, int minValue, int maxValue,
  70         const wxPoint& pos, const wxSize& size,
  71         long style,
  72 /*      const wxValidator& validator = wxDefaultValidator, */
  73         const wxString& name )
  74 {
  75   Create( parent, id, value, minValue, maxValue,
  76           pos, size, style, name );
  77 };
  78
  79 wxSlider::~wxSlider(void)
  80 {
  81 };
  82
  83 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  84         int value, int minValue, int maxValue,
  85         const wxPoint& pos, const wxSize& size,
  86         long style,
  87 /*      const wxValidator& validator = wxDefaultValidator, */
  88         const wxString& name )
  89 {
  90   m_needParent = TRUE;
  91
  92   PreCreation( parent, id, pos, size, style, name );
  93
  94   m_oldPos = 0.0;
  95
  96   if (style & wxSL_VERTICAL == wxSL_VERTICAL)
  97     m_widget = gtk_hscale_new( NULL );
  98   else
  99     m_widget = gtk_vscale_new( NULL );
 100
 101   m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
 102
 103   gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
 104                       (GtkSignalFunc) gtk_slider_callback, (gpointer) this );
 105   SetRange( minValue, maxValue );
 106   SetValue( value );
 107
 108   PostCreation();
 109
 110   Show( TRUE );
 111
 112   return TRUE;
 113 };
 114
 115 int wxSlider::GetValue(void) const
 116 {
 117   return (int)(m_adjust->value+0.5);
 118 };
 119
 120 void wxSlider::SetValue( int value )
 121 {
 122   float fpos = (float)value;
 123   m_oldPos = fpos;
 124   if (fabs(fpos-m_adjust->value) < 0.2) return;
 125   m_adjust->value = fpos;
 126
 127   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 128 };
 129
 130 void wxSlider::SetRange( int minValue, int maxValue )
 131 {
 132   float fmin = (float)minValue;
 133   float fmax = (float)maxValue;
 134
 135   if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 136       (fabs(fmax-m_adjust->upper) < 0.2))
 137       return;
 138
 139   m_adjust->lower = fmin;
 140   m_adjust->upper = fmax;
 141
 142   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 143 };
 144
 145 int wxSlider::GetMin(void) const
 146 {
 147   return (int)(m_adjust->lower+0.5);
 148 };
 149
 150 int wxSlider::GetMax(void) const
 151 {
 152   return (int)(m_adjust->upper+0.5);
 153 };
 154
 155 void wxSlider::SetPageSize( int pageSize )
 156 {
 157   float fpage = (float)pageSize;
 158
 159   if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 160
 161   m_adjust->page_increment = fpage;
 162
 163   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 164 };
 165
 166 int wxSlider::GetPageSize(void) const
 167 {
 168   return (int)(m_adjust->page_increment+0.5);
 169 };
 170
 171 void wxSlider::SetThumbLength( int len )
 172 {
 173   float flen = (float)len;
 174
 175   if (fabs(flen-m_adjust->page_size) < 0.2) return;
 176
 177   m_adjust->page_size = flen;
 178
 179   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 180 };
 181
 182 int wxSlider::GetThumbLength(void) const
 183 {
 184   return (int)(m_adjust->page_size+0.5);
 185 };
 186
 187 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 188 {
 189 };
 190
 191 int wxSlider::GetLineSize(void) const
 192 {
 193   return 0;
 194 };
 195
 196 // not supported in wxGTK (and GTK)
 197
 198 void wxSlider::GetSize( int *x, int *y ) const
 199 {
 200   wxWindow::GetSize( x, y );
 201 };
 202
 203 void wxSlider::SetSize( int x, int y, int width, int height, int sizeFlags )
 204 {
 205   wxWindow::SetSize( x, y, width, height, sizeFlags );
 206 };
 207
 208 void wxSlider::GetPosition( int *x, int *y ) const
 209 {
 210   wxWindow::GetPosition( x, y );
 211 };
 212
 213 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 214 {
 215 };
 216
 217 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 218 {
 219 };
 220
 221 int wxSlider::GetTickFreq(void) const
 222 {
 223   return 0;
 224 };
 225
 226 void wxSlider::ClearTicks(void)
 227 {
 228 };
 229
 230 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 231 {
 232 };
 233
 234 int wxSlider::GetSelEnd(void) const
 235 {
 236   return 0;
 237 };
 238
 239 int wxSlider::GetSelStart(void) const
 240 {
 241   return 0;
 242 };
 243
 244 void wxSlider::ClearSel(void)
 245 {
 246 };
 247