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   gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
  94
  95   m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
  96
  97   gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
  98                       (GtkSignalFunc) gtk_slider_callback, (gpointer) this );
  99   SetRange( minValue, maxValue );
 100   SetValue( value );
 101
 102   PostCreation();
 103
 104   SetBackgroundColour( parent->GetBackgroundColour() );
 105   SetForegroundColour( parent->GetForegroundColour() );
 106
 107   Show( TRUE );
 108
 109   return TRUE;
 110 }
 111
 112 int wxSlider::GetValue(void) const
 113 {
 114   return (int)(m_adjust->value+0.5);
 115 }
 116
 117 void wxSlider::SetValue( int value )
 118 {
 119   float fpos = (float)value;
 120   m_oldPos = fpos;
 121   if (fabs(fpos-m_adjust->value) < 0.2) return;
 122   m_adjust->value = fpos;
 123
 124   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 125 }
 126
 127 void wxSlider::SetRange( int minValue, int maxValue )
 128 {
 129   float fmin = (float)minValue;
 130   float fmax = (float)maxValue;
 131
 132   if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 133       (fabs(fmax-m_adjust->upper) < 0.2))
 134       return;
 135
 136   m_adjust->lower = fmin;
 137   m_adjust->upper = fmax;
 138
 139   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 140 }
 141
 142 int wxSlider::GetMin(void) const
 143 {
 144   return (int)(m_adjust->lower+0.5);
 145 }
 146
 147 int wxSlider::GetMax(void) const
 148 {
 149   return (int)(m_adjust->upper+0.5);
 150 }
 151
 152 void wxSlider::SetPageSize( int pageSize )
 153 {
 154   float fpage = (float)pageSize;
 155
 156   if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 157
 158   m_adjust->page_increment = fpage;
 159
 160   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 161 }
 162
 163 int wxSlider::GetPageSize(void) const
 164 {
 165   return (int)(m_adjust->page_increment+0.5);
 166 }
 167
 168 void wxSlider::SetThumbLength( int len )
 169 {
 170   float flen = (float)len;
 171
 172   if (fabs(flen-m_adjust->page_size) < 0.2) return;
 173
 174   m_adjust->page_size = flen;
 175
 176   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 177 }
 178
 179 int wxSlider::GetThumbLength(void) const
 180 {
 181   return (int)(m_adjust->page_size+0.5);
 182 }
 183
 184 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 185 {
 186 }
 187
 188 int wxSlider::GetLineSize(void) const
 189 {
 190   return 0;
 191 }
 192
 193 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 194 {
 195 }
 196
 197 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 198 {
 199 }
 200
 201 int wxSlider::GetTickFreq(void) const
 202 {
 203   return 0;
 204 }
 205
 206 void wxSlider::ClearTicks(void)
 207 {
 208 }
 209
 210 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 211 {
 212 }
 213
 214 int wxSlider::GetSelEnd(void) const
 215 {
 216   return 0;
 217 }
 218
 219 int wxSlider::GetSelStart(void) const
 220 {
 221   return 0;
 222 }
 223
 224 void wxSlider::ClearSel(void)
 225 {
 226 }
 227
 228 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 229 {
 230   GtkRange *range = GTK_RANGE(m_widget);
 231   return ( (window == GTK_WIDGET(range)->window) ||
 232            (window == range->trough) ||
 233            (window == range->slider) ||
 234            (window == range->step_forw) ||
 235            (window == range->step_back) );
 236 }
 237
 238 void wxSlider::ApplyWidgetStyle()
 239 {
 240   SetWidgetStyle();
 241   gtk_widget_set_style( m_widget, m_widgetStyle );
 242 }