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
  16 #if wxUSE_SLIDER
  17
  18 #include "wx/utils.h"
  19 #include <math.h>
  20
  21 #include "gdk/gdk.h"
  22 #include "gtk/gtk.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // idle system
  26 //-----------------------------------------------------------------------------
  27
  28 extern void wxapp_install_idle_handler();
  29 extern bool g_isIdle;
  30
  31 //-----------------------------------------------------------------------------
  32 // data
  33 //-----------------------------------------------------------------------------
  34
  35 extern bool   g_blockEventsOnDrag;
  36
  37 //-----------------------------------------------------------------------------
  38 // "value_changed"
  39 //-----------------------------------------------------------------------------
  40
  41 static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *win )
  42 {
  43     if (g_isIdle) wxapp_install_idle_handler();
  44
  45     if (!win->m_hasVMT) return;
  46     if (g_blockEventsOnDrag) return;
  47
  48     float diff = win->m_adjust->value - win->m_oldPos;
  49     if (fabs(diff) < 0.2) return;
  50     win->m_oldPos = win->m_adjust->value;
  51
  52     wxEventType command = wxEVT_NULL;
  53
  54     float line_step = win->m_adjust->step_increment;
  55     float page_step = win->m_adjust->page_increment;
  56
  57     if (fabs(win->m_adjust->value-win->m_adjust->lower) < 0.2) command = wxEVT_SCROLL_BOTTOM;
  58     else if (fabs(win->m_adjust->value-win->m_adjust->upper) < 0.2) command = wxEVT_SCROLL_TOP;
  59     else if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;
  60     else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP;
  61     else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN;
  62     else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP;
  63     else command = wxEVT_SCROLL_THUMBTRACK;
  64
  65     int value = (int)ceil(win->m_adjust->value);
  66
  67     int orient = wxHORIZONTAL;
  68     if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL;
  69
  70     wxScrollEvent event( command, win->GetId(), value, orient );
  71     event.SetEventObject( win );
  72     win->GetEventHandler()->ProcessEvent( event );
  73
  74     wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
  75     cevent.SetEventObject( win );
  76     win->GetEventHandler()->ProcessEvent( cevent );
  77 }
  78
  79 //-----------------------------------------------------------------------------
  80 // wxSlider
  81 //-----------------------------------------------------------------------------
  82
  83 IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
  84
  85 wxSlider::wxSlider(void)
  86 {
  87 }
  88
  89 wxSlider::~wxSlider(void)
  90 {
  91 }
  92
  93 bool wxSlider::Create(wxWindow *parent, wxWindowID id,
  94         int value, int minValue, int maxValue,
  95         const wxPoint& pos, const wxSize& size,
  96         long style, const wxValidator& validator, const wxString& name )
  97 {
  98     m_acceptsFocus = TRUE;
  99     m_needParent = TRUE;
 100
 101     PreCreation( parent, id, pos, size, style, name );
 102
 103 #if wxUSE_VALIDATORS
 104     SetValidator( validator );
 105 #endif
 106
 107     m_oldPos = 0.0;
 108
 109     if (style & wxSL_VERTICAL)
 110         m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
 111     else
 112         m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
 113
 114     if (style & wxSL_LABELS)
 115     {
 116         gtk_scale_set_draw_value( GTK_SCALE( m_widget ), TRUE );
 117
 118         /* labels need more space and too small window will
 119            cause junk to appear on the dialog */
 120         if (style & wxSL_VERTICAL)
 121         {
 122             wxSize sz( size );
 123             if (sz.x < 35)
 124             {
 125                 sz.x = 35;
 126                 SetSize( sz );
 127             }
 128         }
 129         else
 130         {
 131             wxSize sz( size );
 132             if (sz.y < 35)
 133             {
 134                 sz.y = 35;
 135                 SetSize( sz );
 136             }
 137         }
 138     }
 139     else
 140         gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
 141
 142     m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
 143
 144     gtk_signal_connect( GTK_OBJECT(m_adjust),
 145                         "value_changed",
 146                         (GtkSignalFunc) gtk_slider_callback,
 147                         (gpointer) this );
 148
 149     SetRange( minValue, maxValue );
 150     SetValue( value );
 151
 152     m_parent->DoAddChild( this );
 153
 154     PostCreation();
 155
 156     SetBackgroundColour( parent->GetBackgroundColour() );
 157
 158     Show( TRUE );
 159
 160     return TRUE;
 161 }
 162
 163 int wxSlider::GetValue(void) const
 164 {
 165     return (int)(m_adjust->value+0.5);
 166 }
 167
 168 void wxSlider::SetValue( int value )
 169 {
 170     float fpos = (float)value;
 171     m_oldPos = fpos;
 172     if (fabs(fpos-m_adjust->value) < 0.2) return;
 173
 174     m_adjust->value = fpos;
 175
 176     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 177 }
 178
 179 void wxSlider::SetRange( int minValue, int maxValue )
 180 {
 181     float fmin = (float)minValue;
 182     float fmax = (float)maxValue;
 183
 184     if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 185         (fabs(fmax-m_adjust->upper) < 0.2))
 186     {
 187         return;
 188     }
 189
 190     m_adjust->lower = fmin;
 191     m_adjust->upper = fmax;
 192
 193     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 194 }
 195
 196 int wxSlider::GetMin(void) const
 197 {
 198     return (int)ceil(m_adjust->lower);
 199 }
 200
 201 int wxSlider::GetMax(void) const
 202 {
 203     return (int)ceil(m_adjust->upper);
 204 }
 205
 206 void wxSlider::SetPageSize( int pageSize )
 207 {
 208     float fpage = (float)pageSize;
 209
 210     if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 211
 212     m_adjust->page_increment = fpage;
 213
 214     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 215 }
 216
 217 int wxSlider::GetPageSize(void) const
 218 {
 219     return (int)ceil(m_adjust->page_increment);
 220 }
 221
 222 void wxSlider::SetThumbLength( int len )
 223 {
 224     float flen = (float)len;
 225
 226     if (fabs(flen-m_adjust->page_size) < 0.2) return;
 227
 228     m_adjust->page_size = flen;
 229
 230     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 231 }
 232
 233 int wxSlider::GetThumbLength(void) const
 234 {
 235     return (int)ceil(m_adjust->page_size);
 236 }
 237
 238 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 239 {
 240 }
 241
 242 int wxSlider::GetLineSize(void) const
 243 {
 244     return 0;
 245 }
 246
 247 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 248 {
 249 }
 250
 251 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 252 {
 253 }
 254
 255 int wxSlider::GetTickFreq(void) const
 256 {
 257     return 0;
 258 }
 259
 260 void wxSlider::ClearTicks(void)
 261 {
 262 }
 263
 264 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 265 {
 266 }
 267
 268 int wxSlider::GetSelEnd(void) const
 269 {
 270     return 0;
 271 }
 272
 273 int wxSlider::GetSelStart(void) const
 274 {
 275     return 0;
 276 }
 277
 278 void wxSlider::ClearSel(void)
 279 {
 280 }
 281
 282 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 283 {
 284     GtkRange *range = GTK_RANGE(m_widget);
 285     return ( (window == GTK_WIDGET(range)->window) ||
 286              (window == range->trough) ||
 287              (window == range->slider) ||
 288              (window == range->step_forw) ||
 289              (window == range->step_back) );
 290 }
 291
 292 void wxSlider::ApplyWidgetStyle()
 293 {
 294     SetWidgetStyle();
 295     gtk_widget_set_style( m_widget, m_widgetStyle );
 296 }
 297
 298 #endif