public void NextExtent()
{
if (_currentExtentIndex < _extentHistory.Count - 1)
{
_currentExtentIndex++;
if (_currentExtentIndex == (_extentHistory.Count - 1))
{
if (NavigateExtentDoneEvent != null)
{
NavigateExtentDoneEventArgs args = new NavigateExtentDoneEventArgs();
args.navigateExtentOn = NavigateExtentFocus.Next;
args.nextEnabled = false;
NavigateExtentDoneEvent(this, args);
}
}
_newExtent = false;
_map.ZoomTo(_extentHistory[_currentExtentIndex]);
if (NavigateExtentDoneEvent != null)
{
NavigateExtentDoneEventArgs args = new NavigateExtentDoneEventArgs();
args.navigateExtentOn = NavigateExtentFocus.Previous;
args.previousEnabled = true;
NavigateExtentDoneEvent(this, args);
}
}
}
void _map_ExtentChanged(object sender, ExtentEventArgs e)
{
////////////////Next and previous extents handling///////////////////
if (e.OldExtent == null)
{
_extentHistory.Add(e.NewExtent.Clone());
return;
}
if (_newExtent)
{
_currentExtentIndex++;
if (_extentHistory.Count - _currentExtentIndex > 0)
{
_extentHistory.RemoveRange(_currentExtentIndex, (_extentHistory.Count - _currentExtentIndex));
}
_extentHistory.Add(e.NewExtent.Clone());
if (NavigateExtentDoneEvent != null)
{
NavigateExtentDoneEventArgs args = new NavigateExtentDoneEventArgs();
args.navigateExtentOn = NavigateExtentFocus.Both;
args.nextEnabled = false;
args.previousEnabled = true;
NavigateExtentDoneEvent(this, args);
}
}
else
{
_newExtent = true;
}
////////////////////////////////////////////////////////////////////////
}