protected override void PaintImages(Graphics g, IEnumerable <Img> images)
{
var pickedDrawRegion = Rectangle.Empty;
var drawRegion = Rectangle.Empty;
foreach (Img image in images)
{
if (_dragItem == null || _dragItem.ItemRef != image)
{
// translate draw region
switch (DisplayMode)
{
case ImageGridDisplayMode.StretchImage:
drawRegion = ImageDisplayModeHelper.GetImageRect(
image.DrawingRegion,
new Rectangle(0, 0, image.Original.Width, image.Original.Height),
Mmosoft.Oops.Controls.DisplayMode.StretchImage);
break;
case ImageGridDisplayMode.ScaleLossCenter:
drawRegion = ImageDisplayModeHelper.GetImageRect(
image.DrawingRegion,
new Rectangle(0, 0, image.Original.Width, image.Original.Height),
Mmosoft.Oops.Controls.DisplayMode.ScaleLossCenter);
break;
}
// set clip to image boundary to clipped outside edges
g.SetClip(image.ClippingRegion);
g.DrawImage(image.Resized, drawRegion);
}
}
// draw floating picked item
if (_dragItem != null)
{
switch (DisplayMode)
{
case ImageGridDisplayMode.StretchImage:
drawRegion = ImageDisplayModeHelper.GetImageRect(
_dragItem.Boundary,
new Rectangle(0, 0, _dragItem.Image.Width, _dragItem.Image.Height),
Mmosoft.Oops.Controls.DisplayMode.StretchImage);
break;
case ImageGridDisplayMode.ScaleLossCenter:
drawRegion = ImageDisplayModeHelper.GetImageRect(
_dragItem.Boundary,
new Rectangle(0, 0, _dragItem.Image.Width, _dragItem.Image.Height),
Mmosoft.Oops.Controls.DisplayMode.ScaleLossCenter);
break;
}
g.SetClip(_dragItem.Boundary);
g.DrawImage(_dragItem.Image, drawRegion);
}
}
//
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;
}