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(win->m_adjust->value-win->m_adjust->lower) < 0.2) command = wxEVT_SCROLL_BOTTOM;
  42   else if (fabs(win->m_adjust->value-win->m_adjust->upper) < 0.2) command = wxEVT_SCROLL_TOP;
  43   else if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;
  44   else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP;
  45   else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN;
  46   else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP;
  47   else command = wxEVT_SCROLL_THUMBTRACK;
  48
  49   int value = (int)(win->m_adjust->value+0.5);
  50
  51   int orient = wxHORIZONTAL;
  52   if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL;
  53
  54   wxScrollEvent event( command, win->GetId(), value, orient );
  55   event.SetEventObject( win );
  56   win->ProcessEvent( event );
  57
  58   wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
  59   cevent.SetEventObject( win );
  60   win->ProcessEvent( cevent );
  61 }
  62
  63 //-----------------------------------------------------------------------------
  64 // wxSlider
  65 //-----------------------------------------------------------------------------
  66
  67 IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
  68
  69 wxSlider::wxSlider(void)
  70 {
  71 }
  72
  73 wxSlider::~wxSlider(void)
  74 {
  75 }
  76
  77 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  78         int value, int minValue, int maxValue,
  79         const wxPoint& pos, const wxSize& size,
  80         long style, const wxValidator& validator, const wxString& name )
  81 {
  82     m_acceptsFocus = TRUE;
  83   m_needParent = TRUE;
  84
  85   PreCreation( parent, id, pos, size, style, name );
  86
  87   SetValidator( validator );
  88
  89   m_oldPos = 0.0;
  90
  91   if (style & wxSL_VERTICAL == wxSL_VERTICAL)
  92     m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
  93   else
  94     m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
  95
  96   gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
  97
  98   m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
  99
 100   gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
 101                       (GtkSignalFunc) gtk_slider_callback, (gpointer) this );
 102   SetRange( minValue, maxValue );
 103   SetValue( value );
 104
 105   m_parent->AddChild( this );
 106
 107   (m_parent->m_insertCallback)( m_parent, this );
 108
 109   PostCreation();
 110
 111   SetBackgroundColour( parent->GetBackgroundColour() );
 112
 113   Show( TRUE );
 114
 115   return TRUE;
 116 }
 117
 118 int wxSlider::GetValue(void) const
 119 {
 120   return (int)(m_adjust->value+0.5);
 121 }
 122
 123 void wxSlider::SetValue( int value )
 124 {
 125   float fpos = (float)value;
 126   m_oldPos = fpos;
 127   if (fabs(fpos-m_adjust->value) < 0.2) return;
 128   m_adjust->value = fpos;
 129
 130   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 131 }
 132
 133 void wxSlider::SetRange( int minValue, int maxValue )
 134 {
 135   float fmin = (float)minValue;
 136   float fmax = (float)maxValue;
 137
 138   if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 139       (fabs(fmax-m_adjust->upper) < 0.2))
 140       return;
 141
 142   m_adjust->lower = fmin;
 143   m_adjust->upper = fmax;
 144
 145   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 146 }
 147
 148 int wxSlider::GetMin(void) const
 149 {
 150   return (int)(m_adjust->lower+0.5);
 151 }
 152
 153 int wxSlider::GetMax(void) const
 154 {
 155   return (int)(m_adjust->upper+0.5);
 156 }
 157
 158 void wxSlider::SetPageSize( int pageSize )
 159 {
 160   float fpage = (float)pageSize;
 161
 162   if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 163
 164   m_adjust->page_increment = fpage;
 165
 166   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 167 }
 168
 169 int wxSlider::GetPageSize(void) const
 170 {
 171   return (int)(m_adjust->page_increment+0.5);
 172 }
 173
 174 void wxSlider::SetThumbLength( int len )
 175 {
 176   float flen = (float)len;
 177
 178   if (fabs(flen-m_adjust->page_size) < 0.2) return;
 179
 180   m_adjust->page_size = flen;
 181
 182   gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 183 }
 184
 185 int wxSlider::GetThumbLength(void) const
 186 {
 187   return (int)(m_adjust->page_size+0.5);
 188 }
 189
 190 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 191 {
 192 }
 193
 194 int wxSlider::GetLineSize(void) const
 195 {
 196   return 0;
 197 }
 198
 199 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 200 {
 201 }
 202
 203 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 204 {
 205 }
 206
 207 int wxSlider::GetTickFreq(void) const
 208 {
 209   return 0;
 210 }
 211
 212 void wxSlider::ClearTicks(void)
 213 {
 214 }
 215
 216 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 217 {
 218 }
 219
 220 int wxSlider::GetSelEnd(void) const
 221 {
 222   return 0;
 223 }
 224
 225 int wxSlider::GetSelStart(void) const
 226 {
 227   return 0;
 228 }
 229
 230 void wxSlider::ClearSel(void)
 231 {
 232 }
 233
 234 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 235 {
 236   GtkRange *range = GTK_RANGE(m_widget);
 237   return ( (window == GTK_WIDGET(range)->window) ||
 238            (window == range->trough) ||
 239            (window == range->slider) ||
 240            (window == range->step_forw) ||
 241            (window == range->step_back) );
 242 }
 243
 244 void wxSlider::ApplyWidgetStyle()
 245 {
 246   SetWidgetStyle();
 247   gtk_widget_set_style( m_widget, m_widgetStyle );
 248 }