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 == wxSL_VERTICAL)
 105         m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
 106     else
 107         m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
 108
 109     gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
 110
 111     m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
 112
 113     gtk_signal_connect( GTK_OBJECT(m_adjust),
 114                         "value_changed",
 115                         (GtkSignalFunc) gtk_slider_callback,
 116                         (gpointer) this );
 117
 118     SetRange( minValue, maxValue );
 119     SetValue( value );
 120
 121     m_parent->AddChild( this );
 122
 123     (m_parent->m_insertCallback)( m_parent, this );
 124
 125     PostCreation();
 126
 127     SetBackgroundColour( parent->GetBackgroundColour() );
 128
 129     Show( TRUE );
 130
 131     return TRUE;
 132 }
 133
 134 int wxSlider::GetValue(void) const
 135 {
 136     return (int)(m_adjust->value+0.5);
 137 }
 138
 139 void wxSlider::SetValue( int value )
 140 {
 141     float fpos = (float)value;
 142     m_oldPos = fpos;
 143     if (fabs(fpos-m_adjust->value) < 0.2) return;
 144
 145     m_adjust->value = fpos;
 146
 147     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
 148 }
 149
 150 void wxSlider::SetRange( int minValue, int maxValue )
 151 {
 152     float fmin = (float)minValue;
 153     float fmax = (float)maxValue;
 154
 155     if ((fabs(fmin-m_adjust->lower) < 0.2) &&
 156         (fabs(fmax-m_adjust->upper) < 0.2))
 157     {
 158         return;
 159     }
 160
 161     m_adjust->lower = fmin;
 162     m_adjust->upper = fmax;
 163
 164     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 165 }
 166
 167 int wxSlider::GetMin(void) const
 168 {
 169     return (int)ceil(m_adjust->lower);
 170 }
 171
 172 int wxSlider::GetMax(void) const
 173 {
 174     return (int)ceil(m_adjust->upper);
 175 }
 176
 177 void wxSlider::SetPageSize( int pageSize )
 178 {
 179     float fpage = (float)pageSize;
 180
 181     if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
 182
 183     m_adjust->page_increment = fpage;
 184
 185     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 186 }
 187
 188 int wxSlider::GetPageSize(void) const
 189 {
 190     return (int)ceil(m_adjust->page_increment);
 191 }
 192
 193 void wxSlider::SetThumbLength( int len )
 194 {
 195     float flen = (float)len;
 196
 197     if (fabs(flen-m_adjust->page_size) < 0.2) return;
 198
 199     m_adjust->page_size = flen;
 200
 201     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
 202 }
 203
 204 int wxSlider::GetThumbLength(void) const
 205 {
 206     return (int)ceil(m_adjust->page_size);
 207 }
 208
 209 void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
 210 {
 211 }
 212
 213 int wxSlider::GetLineSize(void) const
 214 {
 215     return 0;
 216 }
 217
 218 void wxSlider::SetTick( int WXUNUSED(tickPos) )
 219 {
 220 }
 221
 222 void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
 223 {
 224 }
 225
 226 int wxSlider::GetTickFreq(void) const
 227 {
 228     return 0;
 229 }
 230
 231 void wxSlider::ClearTicks(void)
 232 {
 233 }
 234
 235 void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
 236 {
 237 }
 238
 239 int wxSlider::GetSelEnd(void) const
 240 {
 241     return 0;
 242 }
 243
 244 int wxSlider::GetSelStart(void) const
 245 {
 246     return 0;
 247 }
 248
 249 void wxSlider::ClearSel(void)
 250 {
 251 }
 252
 253 bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
 254 {
 255     GtkRange *range = GTK_RANGE(m_widget);
 256     return ( (window == GTK_WIDGET(range)->window) ||
 257              (window == range->trough) ||
 258              (window == range->slider) ||
 259              (window == range->step_forw) ||
 260              (window == range->step_back) );
 261 }
 262
 263 void wxSlider::ApplyWidgetStyle()
 264 {
 265     SetWidgetStyle();
 266     gtk_widget_set_style( m_widget, m_widgetStyle );
 267 }