src/gtk/slider.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        slider.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "slider.h"
  13 #endif
  14
  15 #include "wx/slider.h"
  16 #include "wx/utils.h"
  17
  18 //-----------------------------------------------------------------------------
  19 // data
  20 //-----------------------------------------------------------------------------
  21
  22 extern bool   g_blockEventsOnDrag;
  23
  24 //-----------------------------------------------------------------------------
  25 // "value_changed"
  26 //-----------------------------------------------------------------------------
  27
  28 static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *win )
  29 {
  30   if (!win->HasVMT()) return;
  31   if (g_blockEventsOnDrag) return;
  32
  33   float diff = win->m_adjust->value - win->m_oldPos;
  34   if (fabs(diff) < 0.2) return;
  35
  36   wxEventType command = wxEVT_NULL;
  37
  38   float line_step = win->m_adjust->step_increment;
  39   float page_step = win->m_adjust->page_increment;
  40
  41   if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;
  42   else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP;
  43   else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN;
  44   else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP;
  45   else command = wxEVT_SCROLL_THUMBTRACK;
  46
  47   int value = (int)(win->m_adjust->value+0.5);
  48
  49   int orient = wxHORIZONTAL;
  50   if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL;
  51
  52   wxScrollEvent event( command, win->GetId(), value, orient );
  53   event.SetEventObject( win );
  54   win->ProcessEvent( event );
  55
  56   wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
  57   cevent.SetEventObject( win );
  58   win->ProcessEvent( cevent );
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62 // wxSlider
  63 //-----------------------------------------------------------------------------
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
  66
  67 wxSlider::wxSlider(void)
  68 {
  69 }
  70
  71 wxSlider::~wxSlider(void)
  72 {
  73 }
  74
  75 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  76         int value, int minValue, int maxValue,
  77         const wxPoint& pos, const wxSize& size,
  78         long style, const wxValidator& validator, const wxString& name )
  79 {
  80   m_needParent = TRUE;
  81
  82   PreCreation( parent, id, pos, size, style, name );
  83
  84   SetValidator( validator );
  85
  86   m_oldPos = 0.0;
  87
  88   if (style & wxSL_VERTICAL == wxSL_VERTICAL)
  89     m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
  90   else
  91     m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
  92
  93   m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
  94
  95   gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
  96                       (GtkSignalFunc) gtk_slider_callback, (gpointer) this );
  97   SetRange( minValue, maxValue );
  98   SetValue( value );
  99
 100   PostCreation();
 101
 102   SetBackgroundColour( parent->GetBackgroundColour() );
 103
 104   Show( TRUE );
 105
 106   return TRUE;
 107 }
 108
 109 int wxSlider::GetValue(void) const
 110 {
 111   return (int)(m_adjust->value+0.5);
 112 }
 113
 114 void wxSlider::SetValue( int value )
 115 {
 116   float fpos = (float)value;
 117   m_oldPos = fpos;
 118   if (fabs(fpos-m_adjust->value) < 0.2) return;
 119   m_adjust->value = fpos;
 120
 121   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 122 }
 123
 124 void wxSlider::SetRange( int minValue, int maxValue )
 125 {
 126   float fmin = (float)minValue;
 127   float fmax = (float)maxValue;
 128
 129   if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 130       (fabs(fmax-m_adjust->upper) < 0.2))
 131       return;
 132
 133   m_adjust->lower = fmin;
 134   m_adjust->upper = fmax;
 135
 136   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 137 }
 138
 139 int wxSlider::GetMin(void) const
 140 {
 141   return (int)(m_adjust->lower+0.5);
 142 }
 143
 144 int wxSlider::GetMax(void) const
 145 {
 146   return (int)(m_adjust->upper+0.5);
 147 }
 148
 149 void wxSlider::SetPageSize( int pageSize )
 150 {
 151   float fpage = (float)pageSize;
 152
 153   if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 154
 155   m_adjust->page_increment = fpage;
 156
 157   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 158 }
 159
 160 int wxSlider::GetPageSize(void) const
 161 {
 162   return (int)(m_adjust->page_increment+0.5);
 163 }
 164
 165 void wxSlider::SetThumbLength( int len )
 166 {
 167   float flen = (float)len;
 168
 169   if (fabs(flen-m_adjust->page_size) < 0.2) return;
 170
 171   m_adjust->page_size = flen;
 172
 173   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 174 }
 175
 176 int wxSlider::GetThumbLength(void) const
 177 {
 178   return (int)(m_adjust->page_size+0.5);
 179 }
 180
 181 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 182 {
 183 }
 184
 185 int wxSlider::GetLineSize(void) const
 186 {
 187   return 0;
 188 }
 189
 190 // not supported in wxGTK (and GTK)
 191
 192 void wxSlider::GetSize( int *x, int *y ) const
 193 {
 194   wxWindow::GetSize( x, y );
 195 }
 196
 197 void wxSlider::SetSize( int x, int y, int width, int height, int sizeFlags )
 198 {
 199   wxWindow::SetSize( x, y, width, height, sizeFlags );
 200 }
 201
 202 void wxSlider::GetPosition( int *x, int *y ) const
 203 {
 204   wxWindow::GetPosition( x, y );
 205 }
 206
 207 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 208 {
 209 }
 210
 211 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 212 {
 213 }
 214
 215 int wxSlider::GetTickFreq(void) const
 216 {
 217   return 0;
 218 }
 219
 220 void wxSlider::ClearTicks(void)
 221 {
 222 }
 223
 224 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 225 {
 226 }
 227
 228 int wxSlider::GetSelEnd(void) const
 229 {
 230   return 0;
 231 }
 232
 233 int wxSlider::GetSelStart(void) const
 234 {
 235   return 0;
 236 }
 237
 238 void wxSlider::ClearSel(void)
 239 {
 240 }
 241
 242 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 243 {
 244   GtkRange *range = GTK_RANGE(m_widget);
 245   return ( (window == GTK_WIDGET(range)->window) ||
 246            (window == range->trough) ||
 247            (window == range->slider) ||
 248            (window == range->step_forw) ||
 249            (window == range->step_back) );
 250 }
 251
 252