//
protected override void ComputePosition(int currentReDrawRequestId)
{
var availableWidth = _colWidth;
var rowHeight = _squareSized ? availableWidth: _rowHeight;
var slotMgr = new BlockMgr(_column);
var takenSlots = new List <Block>();
for (int i = 0; i < _imgs.Count; i++)
{
if (currentReDrawRequestId < _redrawRequestId)
{
return;
}
if (ImageDisplayModeHelper.IsPortrait(_imgs[i].ClippingRegion))
{
takenSlots.Add(slotMgr.FindAvailableSlot(1));
}
else // square or landscape
{
// check if we need more slots for landspace image
float imageRatio = 1f * _imgs[i].Original.Width / _imgs[i].Original.Height;
int slotNeeded = MergeColumn ? (int)Math.Round(imageRatio, MidpointRounding.AwayFromZero) : 1;
takenSlots.Add(slotMgr.FindAvailableSlot(slotNeeded));
}
}
// converting slots to specific position in grid
for (int i = 0; i < takenSlots.Count; i++)
{
if (currentReDrawRequestId < _redrawRequestId)
{
return;
}
Img iw = _imgs[i];
Block slot = takenSlots[i];
iw.ClippingRegion = new Rectangle
{
X = (slot.SlotIndex + 1) * _gutter + slot.SlotIndex * availableWidth,
Y = (slot.LaneIndex + 1) * _gutter + slot.LaneIndex * rowHeight - _offsetY,
Width = (slot.SlotNeeded - 1) * _gutter + slot.SlotNeeded * availableWidth,
Height = rowHeight
};
}
_virtualHeight = (slotMgr.LaneCount * rowHeight) + (slotMgr.LaneCount - 1) * _gutter;
}
protected override void ComputePosition(int currentReDrawRequestId)
{
var stackTops = new int[Column];
for (int i = 0; i < stackTops.Length; i++)
{
stackTops[i] = Gutter;
}
int left, top;
List <int> colId;
for (int i = 0; i < _imgs.Count; i++)
{
// new redraw request has been called, skip current redraw
if (currentReDrawRequestId < _redrawRequestId)
{
return;
}
GetMinStackHeightAndIndex(stackTops, out top, out colId);
left = Gutter * (1 + colId[0]) + _colWidth * colId[0];
Img iw = _imgs[i];
int actualImageWidth = iw.Original.Width;
int actualImageHeight = iw.Original.Height;
int availableHeight = (int)((_colWidth * 1f / actualImageWidth) * actualImageHeight);
iw.ClippingRegion = new Rectangle(left, top - _offsetY, _colWidth, availableHeight);
// next image in the same column will be drawned at "columnTops[colId] + availableHeight + MGutter" position
stackTops[colId[0]] += availableHeight + Gutter;
// increase virtual height
if (_virtualHeight < stackTops[colId[0]])
{
_virtualHeight = stackTops[colId[0]];
}
}
}