static void gtk_slider_callback( GtkAdjustment *adjust,
SCROLLBAR_CBACK_ARG
wxSlider *win )
{
if (g_isIdle) wxapp_install_idle_handler();
if (!win->m_hasVMT) return;
if (g_blockEventsOnDrag) return;
const double dvalue = adjust->value;
const double diff = dvalue - win->m_oldPos;
if ( AreSameAdjustValues(diff, 0) )
return;
wxEventType evtType;
evtType = GtkScrollTypeToWx(GET_SCROLL_TYPE(win->m_widget));
ProcessScrollEvent(win, evtType, dvalue);
win->m_oldPos = dvalue;
}
static void
gtk_value_changed(GtkRange* range, wxSlider* win)
{
const double value = gtk_range_get_value(range);
const double oldPos = win->m_pos;
win->m_pos = value;
if (!win->m_hasVMT || g_blockEventsOnDrag)
return;
if (win->GTKEventsDisabled())
{
win->m_scrollEventType = GTK_SCROLL_NONE;
return;
}
wxEventType eventType = wxEVT_NULL;
if (win->m_isScrolling)
{
eventType = wxEVT_SCROLL_THUMBTRACK;
}
else if (win->m_scrollEventType != GTK_SCROLL_NONE)
{
// Scroll event from "move-slider" (keyboard)
eventType = GtkScrollTypeToWx(win->m_scrollEventType);
}
else if (win->m_mouseButtonDown)
{
// Difference from last change event
const double diff = value - oldPos;
const bool isDown = diff > 0;
GtkAdjustment* adj = gtk_range_get_adjustment(range);
if (IsScrollIncrement(gtk_adjustment_get_page_increment(adj), diff))
{
eventType = isDown ? wxEVT_SCROLL_PAGEDOWN : wxEVT_SCROLL_PAGEUP;
}
else if (wxIsSameDouble(value, 0))
{
eventType = wxEVT_SCROLL_PAGEUP;
}
else if (wxIsSameDouble(value, gtk_adjustment_get_upper(adj)))
{
eventType = wxEVT_SCROLL_PAGEDOWN;
}
else
{
// Assume track event
eventType = wxEVT_SCROLL_THUMBTRACK;
// Remember that we're tracking
win->m_isScrolling = true;
}
}
win->m_scrollEventType = GTK_SCROLL_NONE;
// If integral position has changed
if (wxRound(oldPos) != wxRound(value))
{
ProcessScrollEvent(win, eventType);
win->m_needThumbRelease = eventType == wxEVT_SCROLL_THUMBTRACK;
}
}
