/// <summary>
/// Draws the views.
/// </summary>
private void DrawViews ()
{
var availDefs = new List<int> ();
var rowsToKeep = new IDSGridRowViewCollection ();
int lastIndex = 0;
if (mRowStart < 0)
mRowStart = 0;
for (int i = mRowStart; i < Processor.NumberOfRows; i++)
{
var height = (i == 0 && this.Theme.HeaderStyle != GridHeaderStyle.None) ? this.Theme.HeaderHeight : Processor.RowHeight;
var top = Processor.TopYForRow (i);
if (ShouldShowRow (top, height))
{
availDefs.Add (i);
var aRow = Processor.Rows.ViewForRowIndex (i) as DSGridRowView;
if (aRow != null)
rowsToKeep.Add (aRow);
}
else
{
if (IsAboveScreen (top, height))
{
continue;
}
else if (IsBelowScreen (top, height))
{
lastIndex = i;
break;
}
}
}
if (rowsToKeep.Count != 0)
mRowStart = (lastIndex - rowsToKeep.Count) - 5;
//find the rows that are no longer need on screen
var freeRows = (from freeRow in Processor.Rows
where !rowsToKeep.Contains (freeRow)
select freeRow).ToList ();
//remove them from the screen and add them to the free rows screen
foreach (var item in freeRows)
{
item.DetachView ();
Processor.FreeRows.Add (item);
}
Processor.Rows.Clear ();
Processor.Rows = rowsToKeep;
rowsToKeep = null;
foreach (var index in availDefs)
{
var aRow = Processor.FindViewForRow (index, (Index)=>
{
return new DSGridRowView (Index, this);
}) as DSGridRowView;
var height = (index == 0 && this.Theme.HeaderStyle != GridHeaderStyle.None) ? this.Theme.HeaderHeight : Processor.RowHeight;
var top = Processor.TopYForRow (index);
//aRow.Columns = ColDefs;
aRow.Frame = new CGRect (0, top, this.ContentSize.Width, height).Integral ();
if (aRow.Superview == null)
{
this.InsertSubview (aRow, 0);
}
}
//clear unused rows
availDefs.Clear ();
Processor.FreeRows.Dispose ();
}
/// <summary>
/// Draws the views.
/// </summary>
private void DrawViews()
{
var availDefs = new List <int> ();
var rowsToKeep = new IDSGridRowViewCollection();
int lastIndex = 0;
if (mRowStart < 0)
{
mRowStart = 0;
}
for (int i = mRowStart; i < mParentGrid.Processor.NumberOfRows; i++)
{
//var height = (i == 0 && mParentGrid.Theme.HeaderStyle != GridHeaderStyle.None) ? mParentGrid.Theme.HeaderHeight : mParentGrid.Processor.RowHeight;
//var top = mParentGrid.Processor.TopYForRow (i);
availDefs.Add(i);
var aRow = mParentGrid.Processor.Rows.ViewForRowIndex(i);
if (aRow != null)
{
rowsToKeep.Add(aRow);
}
// if (ShouldShowRow (top, height))
// {
// availDefs.Add (i);
// var aRow = Processor.Rows.ViewForRowIndex (i);
//
// if (aRow != null)
// rowsToKeep.Add (aRow);
//
// }
// else
// {
// if (IsAboveScreen (top, height))
// {
// continue;
// }
// else if (IsBelowScreen (top, height))
// {
// lastIndex = i;
// break;
// }
// }
}
if (rowsToKeep.Count != 0)
{
mRowStart = (lastIndex - rowsToKeep.Count) - 5;
}
//find the rows that are no longer need on screen
var freeRows = (from freeRow in mParentGrid.Processor.Rows
where !rowsToKeep.Contains(freeRow)
select freeRow).ToList();
//remove them from the screen and add them to the free rows screen
foreach (var item in freeRows)
{
mContainer.RemoveView(item as DSGridViewContainer);
mParentGrid.Processor.FreeRows.Add(item);
}
mParentGrid.Processor.Rows.Clear();
mParentGrid.Processor.Rows = rowsToKeep;
rowsToKeep = null;
foreach (var index in availDefs)
{
//var aRow = Processor.FindViewForRow (index);
var aRow = mParentGrid.Processor.FindViewForRow(index, (Index) =>
{
return(new DSGridRowView(Index, this.mParentGrid));
}) as DSGridRowView;
var height = (index == 0 && mParentGrid.Theme.HeaderStyle != GridHeaderStyle.None) ? mParentGrid.Theme.HeaderHeight : mParentGrid.Processor.RowHeight;
var top = mParentGrid.Processor.TopYForRow(index);
//aRow.Columns = ColDefs;
//aRow.Frame = new RectangleF (0, top, this.ContentSize.Width, height).Integral ();
var lp = new DSAbsoluteLayout.DSAbsoluteLayoutParams(LayoutParams.FillParent, Context.ToDevicePixels((int)height), 0, Context.ToDevicePixels((int)top));
aRow.LayoutParameters = lp;
if (aRow.Parent == null)
{
aRow.Initialize();
mContainer.AddView(aRow, 0);
}
}
//clear unused rows
availDefs.Clear();
mParentGrid.Processor.FreeRows.Dispose();
}