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