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 #include "gdk/gdk.h"
  19 #include "gtk/gtk.h"
  20
  21 //-----------------------------------------------------------------------------
  22 // data
  23 //-----------------------------------------------------------------------------
  24
  25 extern bool   g_blockEventsOnDrag;
  26
  27 //-----------------------------------------------------------------------------
  28 // "value_changed"
  29 //-----------------------------------------------------------------------------
  30
  31 static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *win )
  32 {
  33     if (!win->HasVMT()) return;
  34     if (g_blockEventsOnDrag) return;
  35
  36     float diff = win->m_adjust->value - win->m_oldPos;
  37     if (fabs(diff) < 0.2) return;
  38     win->m_oldPos = win->m_adjust->value;
  39
  40     wxEventType command = wxEVT_NULL;
  41
  42     float line_step = win->m_adjust->step_increment;
  43     float page_step = win->m_adjust->page_increment;
  44
  45     if (fabs(win->m_adjust->value-win->m_adjust->lower) < 0.2) command = wxEVT_SCROLL_BOTTOM;
  46     else if (fabs(win->m_adjust->value-win->m_adjust->upper) < 0.2) command = wxEVT_SCROLL_TOP;
  47     else if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;
  48     else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP;
  49     else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN;
  50     else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP;
  51     else command = wxEVT_SCROLL_THUMBTRACK;
  52
  53     int value = (int)ceil(win->m_adjust->value);
  54
  55     int orient = wxHORIZONTAL;
  56     if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL;
  57
  58     wxScrollEvent event( command, win->GetId(), value, orient );
  59     event.SetEventObject( win );
  60     win->GetEventHandler()->ProcessEvent( event );
  61
  62     wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
  63     cevent.SetEventObject( win );
  64     win->GetEventHandler()->ProcessEvent( cevent );
  65 }
  66
  67 //-----------------------------------------------------------------------------
  68 // wxSlider
  69 //-----------------------------------------------------------------------------
  70
  71 IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
  72
  73 wxSlider::wxSlider(void)
  74 {
  75 }
  76
  77 wxSlider::~wxSlider(void)
  78 {
  79 }
  80
  81 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  82         int value, int minValue, int maxValue,
  83         const wxPoint& pos, const wxSize& size,
  84         long style, const wxValidator& validator, const wxString& name )
  85 {
  86     m_acceptsFocus = TRUE;
  87     m_needParent = TRUE;
  88
  89     PreCreation( parent, id, pos, size, style, name );
  90
  91     SetValidator( validator );
  92
  93     m_oldPos = 0.0;
  94
  95     if (style & wxSL_VERTICAL == wxSL_VERTICAL)
  96         m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
  97     else
  98         m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
  99
 100     gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
 101
 102     m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
 103
 104     gtk_signal_connect( GTK_OBJECT(m_adjust),
 105                         "value_changed",
 106                         (GtkSignalFunc) gtk_slider_callback,
 107                         (gpointer) this );
 108
 109     SetRange( minValue, maxValue );
 110     SetValue( value );
 111
 112     m_parent->AddChild( this );
 113
 114     (m_parent->m_insertCallback)( m_parent, this );
 115
 116     PostCreation();
 117
 118     SetBackgroundColour( parent->GetBackgroundColour() );
 119
 120     Show( TRUE );
 121
 122     return TRUE;
 123 }
 124
 125 int wxSlider::GetValue(void) const
 126 {
 127     return (int)(m_adjust->value+0.5);
 128 }
 129
 130 void wxSlider::SetValue( int value )
 131 {
 132     float fpos = (float)value;
 133     m_oldPos = fpos;
 134     if (fabs(fpos-m_adjust->value) < 0.2) return;
 135
 136     m_adjust->value = fpos;
 137
 138     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 139 }
 140
 141 void wxSlider::SetRange( int minValue, int maxValue )
 142 {
 143     float fmin = (float)minValue;
 144     float fmax = (float)maxValue;
 145
 146     if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 147         (fabs(fmax-m_adjust->upper) < 0.2))
 148     {
 149         return;
 150     }
 151
 152     m_adjust->lower = fmin;
 153     m_adjust->upper = fmax;
 154
 155     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 156 }
 157
 158 int wxSlider::GetMin(void) const
 159 {
 160     return (int)ceil(m_adjust->lower);
 161 }
 162
 163 int wxSlider::GetMax(void) const
 164 {
 165     return (int)ceil(m_adjust->upper);
 166 }
 167
 168 void wxSlider::SetPageSize( int pageSize )
 169 {
 170     float fpage = (float)pageSize;
 171
 172     if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 173
 174     m_adjust->page_increment = fpage;
 175
 176     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 177 }
 178
 179 int wxSlider::GetPageSize(void) const
 180 {
 181     return (int)ceil(m_adjust->page_increment);
 182 }
 183
 184 void wxSlider::SetThumbLength( int len )
 185 {
 186     float flen = (float)len;
 187
 188     if (fabs(flen-m_adjust->page_size) < 0.2) return;
 189
 190     m_adjust->page_size = flen;
 191
 192     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 193 }
 194
 195 int wxSlider::GetThumbLength(void) const
 196 {
 197     return (int)ceil(m_adjust->page_size);
 198 }
 199
 200 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 201 {
 202 }
 203
 204 int wxSlider::GetLineSize(void) const
 205 {
 206     return 0;
 207 }
 208
 209 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 210 {
 211 }
 212
 213 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 214 {
 215 }
 216
 217 int wxSlider::GetTickFreq(void) const
 218 {
 219     return 0;
 220 }
 221
 222 void wxSlider::ClearTicks(void)
 223 {
 224 }
 225
 226 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 227 {
 228 }
 229
 230 int wxSlider::GetSelEnd(void) const
 231 {
 232     return 0;
 233 }
 234
 235 int wxSlider::GetSelStart(void) const
 236 {
 237     return 0;
 238 }
 239
 240 void wxSlider::ClearSel(void)
 241 {
 242 }
 243
 244 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 245 {
 246     GtkRange *range = GTK_RANGE(m_widget);
 247     return ( (window == GTK_WIDGET(range)->window) ||
 248              (window == range->trough) ||
 249              (window == range->slider) ||
 250              (window == range->step_forw) ||
 251              (window == range->step_back) );
 252 }
 253
 254 void wxSlider::ApplyWidgetStyle()
 255 {
 256     SetWidgetStyle();
 257     gtk_widget_set_style( m_widget, m_widgetStyle );
 258 }