protected override void Draw(Rect screenRect, ICollection <int> selection, ref bool focusSelectedItem)
{
float itemWidth = itemSize + itemPadding * 2;
float itemHeight = itemSize + itemLabelHeight + itemLabelTopPadding + itemPadding * 2;
var gridWidth = screenRect.width;
var itemCount = items.Count;
int columnCount = (int)(gridWidth / itemWidth);
int lineCount = Mathf.CeilToInt(itemCount / (float)columnCount);
var gridHeight = lineCount * itemHeight - Styles.statusLabel.fixedHeight;
var availableHeight = screenRect.height;
if (gridHeight > availableHeight)
{
gridWidth -= Styles.scrollbar.fixedWidth;
columnCount = (int)(gridWidth / itemWidth);
lineCount = Mathf.CeilToInt(itemCount / (float)columnCount);
gridHeight = lineCount * itemHeight;
}
var spaceBetweenTiles = (gridWidth - (columnCount * itemWidth)) / (columnCount + 1f);
var viewRect = screenRect; viewRect.width = gridWidth; viewRect.height = gridHeight;
m_ScrollPosition = GUI.BeginScrollView(screenRect, m_ScrollPosition, viewRect);
Rect gridRect = new Rect(0, screenRect.y + m_ScrollPosition.y, gridWidth, availableHeight);
Rect itemRect = new Rect(spaceBetweenTiles, screenRect.y, itemWidth, itemHeight);
var evt = Event.current;
int index = 0;
int selectionIndex = selection.Count == 0 ? -1 : selection.Last();
var eventType = evt.type;
var mouseButton = evt.button;
var mousePosition = evt.mousePosition;
var isHoverGrid = !SearchField.IsAutoCompleteHovered(evt.mousePosition);
isHoverGrid &= gridRect.Contains(mousePosition);
foreach (var item in items)
{
if (evt.type == EventType.Repaint && index == selectionIndex && focusSelectedItem)
{
FocusGridItemRect(itemRect, screenRect);
focusSelectedItem = false;
}
if (itemRect.Overlaps(gridRect))
{
if (evt.isMouse && !isHoverGrid)
{
// Skip
}
else if (eventType == EventType.MouseDown && mouseButton == 0)
{
if (itemRect.Contains(mousePosition))
{
HandleMouseDown(index);
}
}
else if (evt.type == EventType.MouseUp || IsDragClicked(evt))
{
if (itemRect.Contains(mousePosition))
{
HandleMouseUp(index, itemCount);
if (index == selectionIndex)
{
focusSelectedItem = true;
}
}
}
else if (eventType == EventType.MouseDrag && m_PrepareDrag)
{
if (itemRect.Contains(mousePosition))
{
HandleMouseDrag(index, itemCount);
}
}
else if (eventType == EventType.Repaint)
{
DrawGridItem(index, item, itemRect, isHoverGrid, selection, evt);
}
else
{
item.preview = null;
}
}
itemRect = new Rect(itemRect.x + itemWidth + spaceBetweenTiles, itemRect.y, itemWidth, itemHeight);
if (itemRect.xMax > gridWidth)
{
itemRect = new Rect(spaceBetweenTiles, itemRect.y + itemHeight, itemRect.width, itemRect.height);
}
++index;
}
GUI.EndScrollView();
}