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 #include <math.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   m_parent->AddChild( this );
 103
 104   (m_parent->m_insertCallback)( m_parent, this );
 105
 106   PostCreation();
 107
 108   SetBackgroundColour( parent->GetBackgroundColour() );
 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 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 197 {
 198 }
 199
 200 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 201 {
 202 }
 203
 204 int wxSlider::GetTickFreq(void) const
 205 {
 206   return 0;
 207 }
 208
 209 void wxSlider::ClearTicks(void)
 210 {
 211 }
 212
 213 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 214 {
 215 }
 216
 217 int wxSlider::GetSelEnd(void) const
 218 {
 219   return 0;
 220 }
 221
 222 int wxSlider::GetSelStart(void) const
 223 {
 224   return 0;
 225 }
 226
 227 void wxSlider::ClearSel(void)
 228 {
 229 }
 230
 231 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 232 {
 233   GtkRange *range = GTK_RANGE(m_widget);
 234   return ( (window == GTK_WIDGET(range)->window) ||
 235            (window == range->trough) ||
 236            (window == range->slider) ||
 237            (window == range->step_forw) ||
 238            (window == range->step_back) );
 239 }
 240
 241 void wxSlider::ApplyWidgetStyle()
 242 {
 243   SetWidgetStyle();
 244   gtk_widget_set_style( m_widget, m_widgetStyle );
 245 }