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 // "value_changed"
  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 //-----------------------------------------------------------------------------
  63 // wxSlider
  64 //-----------------------------------------------------------------------------
  65
  66 IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
  67
  68 wxSlider::wxSlider(void)
  69 {
  70 }
  71
  72 wxSlider::~wxSlider(void)
  73 {
  74 }
  75
  76 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  77         int value, int minValue, int maxValue,
  78         const wxPoint& pos, const wxSize& size,
  79         long style, const wxValidator& validator, const wxString& name )
  80 {
  81   m_needParent = TRUE;
  82
  83   PreCreation( parent, id, pos, size, style, name );
  84
  85   SetValidator( validator );
  86
  87   m_oldPos = 0.0;
  88
  89   if (style & wxSL_VERTICAL == wxSL_VERTICAL)
  90     m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
  91   else
  92     m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
  93
  94   m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
  95
  96   gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
  97                       (GtkSignalFunc) gtk_slider_callback, (gpointer) this );
  98   SetRange( minValue, maxValue );
  99   SetValue( value );
 100
 101   PostCreation();
 102
 103   Show( TRUE );
 104
 105   return TRUE;
 106 }
 107
 108 int wxSlider::GetValue(void) const
 109 {
 110   return (int)(m_adjust->value+0.5);
 111 }
 112
 113 void wxSlider::SetValue( int value )
 114 {
 115   float fpos = (float)value;
 116   m_oldPos = fpos;
 117   if (fabs(fpos-m_adjust->value) < 0.2) return;
 118   m_adjust->value = fpos;
 119
 120   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 121 }
 122
 123 void wxSlider::SetRange( int minValue, int maxValue )
 124 {
 125   float fmin = (float)minValue;
 126   float fmax = (float)maxValue;
 127
 128   if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 129       (fabs(fmax-m_adjust->upper) < 0.2))
 130       return;
 131
 132   m_adjust->lower = fmin;
 133   m_adjust->upper = fmax;
 134
 135   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 136 }
 137
 138 int wxSlider::GetMin(void) const
 139 {
 140   return (int)(m_adjust->lower+0.5);
 141 }
 142
 143 int wxSlider::GetMax(void) const
 144 {
 145   return (int)(m_adjust->upper+0.5);
 146 }
 147
 148 void wxSlider::SetPageSize( int pageSize )
 149 {
 150   float fpage = (float)pageSize;
 151
 152   if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 153
 154   m_adjust->page_increment = fpage;
 155
 156   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 157 }
 158
 159 int wxSlider::GetPageSize(void) const
 160 {
 161   return (int)(m_adjust->page_increment+0.5);
 162 }
 163
 164 void wxSlider::SetThumbLength( int len )
 165 {
 166   float flen = (float)len;
 167
 168   if (fabs(flen-m_adjust->page_size) < 0.2) return;
 169
 170   m_adjust->page_size = flen;
 171
 172   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 173 }
 174
 175 int wxSlider::GetThumbLength(void) const
 176 {
 177   return (int)(m_adjust->page_size+0.5);
 178 }
 179
 180 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 181 {
 182 }
 183
 184 int wxSlider::GetLineSize(void) const
 185 {
 186   return 0;
 187 }
 188
 189 // not supported in wxGTK (and GTK)
 190
 191 void wxSlider::GetSize( int *x, int *y ) const
 192 {
 193   wxWindow::GetSize( x, y );
 194 }
 195
 196 void wxSlider::SetSize( int x, int y, int width, int height, int sizeFlags )
 197 {
 198   wxWindow::SetSize( x, y, width, height, sizeFlags );
 199 }
 200
 201 void wxSlider::GetPosition( int *x, int *y ) const
 202 {
 203   wxWindow::GetPosition( x, y );
 204 }
 205
 206 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 207 {
 208 }
 209
 210 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 211 {
 212 }
 213
 214 int wxSlider::GetTickFreq(void) const
 215 {
 216   return 0;
 217 }
 218
 219 void wxSlider::ClearTicks(void)
 220 {
 221 }
 222
 223 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 224 {
 225 }
 226
 227 int wxSlider::GetSelEnd(void) const
 228 {
 229   return 0;
 230 }
 231
 232 int wxSlider::GetSelStart(void) const
 233 {
 234   return 0;
 235 }
 236
 237 void wxSlider::ClearSel(void)
 238 {
 239 }
 240
 241 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 242 {
 243   GtkRange *range = GTK_RANGE(m_widget);
 244   return ( (window == GTK_WIDGET(range)->window) ||
 245            (window == range->trough) ||
 246            (window == range->slider) ||
 247            (window == range->step_forw) ||
 248            (window == range->step_back) );
 249 }
 250
 251