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 #ifdef __GNUG__
  11 #pragma implementation "slider.h"
  12 #endif
  13
  14 #include "wx/slider.h"
  15 #include "wx/utils.h"
  16
  17 //-----------------------------------------------------------------------------
  18 // data
  19 //-----------------------------------------------------------------------------
  20
  21 extern bool   g_blockEventsOnDrag;
  22
  23 //-----------------------------------------------------------------------------
  24 // "value_changed"
  25 //-----------------------------------------------------------------------------
  26
  27 static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *win )
  28 {
  29   if (!win->HasVMT()) return;
  30   if (g_blockEventsOnDrag) return;
  31
  32   float diff = win->m_adjust->value - win->m_oldPos;
  33   if (fabs(diff) < 0.2) return;
  34
  35   wxEventType command = wxEVT_NULL;
  36
  37   float line_step = win->m_adjust->step_increment;
  38   float page_step = win->m_adjust->page_increment;
  39
  40   if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;
  41   else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP;
  42   else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN;
  43   else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP;
  44   else command = wxEVT_SCROLL_THUMBTRACK;
  45
  46   int value = (int)(win->m_adjust->value+0.5);
  47
  48   int orient = wxHORIZONTAL;
  49   if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL;
  50
  51   wxScrollEvent event( command, win->GetId(), value, orient );
  52   event.SetEventObject( win );
  53   win->ProcessEvent( event );
  54
  55   wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
  56   cevent.SetEventObject( win );
  57   win->ProcessEvent( cevent );
  58 }
  59
  60 //-----------------------------------------------------------------------------
  61 // wxSlider
  62 //-----------------------------------------------------------------------------
  63
  64 IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
  65
  66 wxSlider::wxSlider(void)
  67 {
  68 }
  69
  70 wxSlider::~wxSlider(void)
  71 {
  72 }
  73
  74 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  75         int value, int minValue, int maxValue,
  76         const wxPoint& pos, const wxSize& size,
  77         long style, const wxValidator& validator, const wxString& name )
  78 {
  79   m_needParent = TRUE;
  80
  81   PreCreation( parent, id, pos, size, style, name );
  82
  83   SetValidator( validator );
  84
  85   m_oldPos = 0.0;
  86
  87   if (style & wxSL_VERTICAL == wxSL_VERTICAL)
  88     m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
  89   else
  90     m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
  91
  92   gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
  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   m_parent->AddChild( this );
 102
 103   (m_parent->m_insertCallback)( m_parent, this );
 104
 105   PostCreation();
 106
 107   SetBackgroundColour( parent->GetBackgroundColour() );
 108
 109   Show( TRUE );
 110
 111   return TRUE;
 112 }
 113
 114 int wxSlider::GetValue(void) const
 115 {
 116   return (int)(m_adjust->value+0.5);
 117 }
 118
 119 void wxSlider::SetValue( int value )
 120 {
 121   float fpos = (float)value;
 122   m_oldPos = fpos;
 123   if (fabs(fpos-m_adjust->value) < 0.2) return;
 124   m_adjust->value = fpos;
 125
 126   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 127 }
 128
 129 void wxSlider::SetRange( int minValue, int maxValue )
 130 {
 131   float fmin = (float)minValue;
 132   float fmax = (float)maxValue;
 133
 134   if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 135       (fabs(fmax-m_adjust->upper) < 0.2))
 136       return;
 137
 138   m_adjust->lower = fmin;
 139   m_adjust->upper = fmax;
 140
 141   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 142 }
 143
 144 int wxSlider::GetMin(void) const
 145 {
 146   return (int)(m_adjust->lower+0.5);
 147 }
 148
 149 int wxSlider::GetMax(void) const
 150 {
 151   return (int)(m_adjust->upper+0.5);
 152 }
 153
 154 void wxSlider::SetPageSize( int pageSize )
 155 {
 156   float fpage = (float)pageSize;
 157
 158   if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 159
 160   m_adjust->page_increment = fpage;
 161
 162   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 163 }
 164
 165 int wxSlider::GetPageSize(void) const
 166 {
 167   return (int)(m_adjust->page_increment+0.5);
 168 }
 169
 170 void wxSlider::SetThumbLength( int len )
 171 {
 172   float flen = (float)len;
 173
 174   if (fabs(flen-m_adjust->page_size) < 0.2) return;
 175
 176   m_adjust->page_size = flen;
 177
 178   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 179 }
 180
 181 int wxSlider::GetThumbLength(void) const
 182 {
 183   return (int)(m_adjust->page_size+0.5);
 184 }
 185
 186 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 187 {
 188 }
 189
 190 int wxSlider::GetLineSize(void) const
 191 {
 192   return 0;
 193 }
 194
 195 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 196 {
 197 }
 198
 199 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 200 {
 201 }
 202
 203 int wxSlider::GetTickFreq(void) const
 204 {
 205   return 0;
 206 }
 207
 208 void wxSlider::ClearTicks(void)
 209 {
 210 }
 211
 212 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 213 {
 214 }
 215
 216 int wxSlider::GetSelEnd(void) const
 217 {
 218   return 0;
 219 }
 220
 221 int wxSlider::GetSelStart(void) const
 222 {
 223   return 0;
 224 }
 225
 226 void wxSlider::ClearSel(void)
 227 {
 228 }
 229
 230 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 231 {
 232   GtkRange *range = GTK_RANGE(m_widget);
 233   return ( (window == GTK_WIDGET(range)->window) ||
 234            (window == range->trough) ||
 235            (window == range->slider) ||
 236            (window == range->step_forw) ||
 237            (window == range->step_back) );
 238 }
 239
 240 void wxSlider::ApplyWidgetStyle()
 241 {
 242   SetWidgetStyle();
 243   gtk_widget_set_style( m_widget, m_widgetStyle );
 244 }