protected void ShowFount(int _start, int _count)
{
List <MRATextItemView> _vits = new List <MRATextItemView>();
for (int i = 0; i < _count; i++)
{
if (vcount <= 0)
{
break;
}
MRATextItemView item = null;
if (vcount < vits.Count())
{
item = vits.LastOrDefault();
vits.RemoveAt(vits.Count() - 1);
}
else
{
item = new MRATextItemView();
Children.Add(item);
}
item.DataContext = lits[_start + i];
vheight += item.Height;
_vits.Add(item);
while (vcount > 0 && vheight - vits[vcount - 1].Height >= ViewportPixelHeight)
{
vheight -= vits[vcount - 1].Height;
vits[vcount-- - 1].DataContext = null;
}
}
vstart = _start;
vcount += _vits.Count();
vits.InsertRange(0, _vits);
}
public MRASelectionDrawingVisual(MRATextItemView _parent) : base(_parent)
{
this.timerblink = new DispatcherTimer(new TimeSpan(0, 0, 0, 0, 500), DispatcherPriority.Normal, _HandleBlink, Dispatcher);
this.status = SelectionStatus.None;
this.blinkshow = true;
this.forceshow = false;
}
protected void ShowBack(int _start, int _count)
{
int oldvcount = vcount;
int rcount = 0;
int reused = 0;
for (int i = _count - 1; i >= 0; i--)
{
if (rcount >= vcount)
{
break;
}
MRATextItemView item = null;
if (vcount >= vits.Count())
{
if (reused < rcount)
{
item = vits[reused++];
}
else
{
item = new MRATextItemView();
Children.Add(item);
}
vits.Add(item);
}
else
{
item = vits[vcount];
}
item.DataContext = lits[_start + i];
vheight += item.Height;
vcount++;
while (rcount < vcount && vheight - vits[rcount].Height >= ViewportPixelHeight)
{
vheight -= vits[rcount].Height;
vits[rcount++].DataContext = null;
}
}
for (int i = reused; i < rcount; i++)
{
vits.Add(vits[i]);
}
vits.Reverse(oldvcount, vcount - oldvcount);
vits.RemoveRange(0, rcount);
vcount -= rcount;
vstart = _start + _count - vcount;
}
protected void ShowBack()
{
while (vstart + vcount < lits.Count() && vheight < ViewportPixelHeight)
{
while (vits.Count() <= vcount)
{
MRATextItemView item = new MRATextItemView();
Children.Add(item);
vits.Add(item);
}
{
MRATextItemView item = vits[vcount];
item.DataContext = lits[vstart + vcount++];
vheight += item.Height;
}
}
}
/*
* protected void HideFount(int _count)
* {
* List<MRATextItemView> _vits = vits.GetRange(0, _count);
* _vits.RemoveRange(0, _count);
* vstart += _count;
* vcount -= _count;
* vheight -= _vits.Sum(v => v.Height);
* foreach (MRATextItemView item in _vits)
* item.DataContext = null;
* vits.AddRange(_vits);
* ShowBack();
* }
*
* protected void HideBack(int _count)
* {
* for (int i = vcount - _count; i < vcount; i++)
* {
* vheight -= vits[i].Height;
* vits[i].DataContext = null;
* }
* vcount -= _count;
* ShowFount();
* }
*/
protected void ShowFount()
{
List <MRATextItemView> _vits = new List <MRATextItemView>();
while (vstart > 0 && vheight < ViewportPixelHeight)
{
MRATextItemView item = null;
if (vits.Count() > vcount)
{
item = vits.LastOrDefault();
vits.RemoveAt(vits.Count() - 1);
}
else
{
item = new MRATextItemView();
Children.Add(item);
}
item.DataContext = lits[--vstart];
vcount++;
vheight += item.Height;
_vits.Add(item);
}
vits.InsertRange(0, _vits);
}
public MRANumberBarDrawingVisual(MRATextItemView _parent) : base(_parent)
{
}
public MRATextItemDrawingVisual(MRATextItemView _parent)
{
this.parent = _parent;
}
public MRARawTextDrawingVisual(MRATextItemView _parent) : base(_parent)
{
}
public MRAStructBarDrawingVisual(MRATextItemView _parent) : base(_parent)
{
}
