/// <summary>
/// Initializes a new instance of the HitInfo class.
/// </summary>
/// <param name="itemIndex">Index of the item.</param>
/// <param name="checkBoxHit">if set to true the mouse cursor is over a checkbox.</param>
/// <param name="group">The group header hit.</param>
/// <param name="column">The column header hit</param>
/// <param name="columnSeparator">The column separator.</param>
/// <param name="subItemIndex">Index of the sub item.</param>
/// <param name="paneBorder">if set to true the mouse cursor is over the left-pane border.</param>
/// <param name="inItemArea">if set to true the mouse is in the item area.</param>
/// <param name="inHeaderArea">if set to true the mouse cursor is in the column header area.</param>
/// <param name="inPaneArea">if set to true the mouse cursor is in the left-pane area.</param>
private HitInfo(int itemIndex, bool checkBoxHit, ImageListViewGroup group, ImageListViewColumnHeader column,
ImageListViewColumnHeader columnSeparator, int subItemIndex,
bool paneBorder, bool inItemArea, bool inHeaderArea, bool inPaneArea)
{
ItemIndex = itemIndex;
CheckBoxHit = checkBoxHit;
Group = group;
Column = column;
ColumnSeparator = columnSeparator;
SubItemIndex = subItemIndex;
InItemArea = inItemArea;
InHeaderArea = inHeaderArea;
InPaneArea = inPaneArea;
PaneBorder = paneBorder;
}
/// <summary>
/// Compares the current object with another object of the same type.
/// </summary>
/// <param name="other">An object to compare with this object.</param>
/// <returns>
/// A 32-bit signed integer that indicates the relative order of the objects being compared. The return value has the following meanings:
/// Value
/// Meaning
/// Less than zero
/// This object is less than the <paramref name="other"/> parameter.
/// Zero
/// This object is equal to <paramref name="other"/>.
/// Greater than zero
/// This object is greater than <paramref name="other"/>.
/// </returns>
public int CompareTo(ImageListViewGroup other)
{
return(string.Compare(Name, other.Name));
}
/// <summary>
/// Initializes a new instance of the HitInfo class.
/// Used when the control registered a column hit.
/// </summary>
/// <param name="group">The group header hit.</param>
internal HitInfo(ImageListViewGroup group)
: this(-1, false, group, null, null, -1, false, false, true, false)
{
;
}
/// <summary>
/// Updates groups after adding or removing an item. This just updates
/// the count of items in groups, it DOES NOT re-sort the items.
/// </summary>
/// <param name="index">The index of the new or removed item.</param>
/// <param name="add">true to add an item; false to remove a item.</param>
private void AddRemoveGroupItem(int index, bool add)
{
if (mImageListView == null || !mImageListView.GroupsVisible)
{
return;
}
if (mImageListView.groups.Count == 0)
{
Sort();
return;
}
// Special case of adding an item to the end
ImageListViewGroup lastGroup = mImageListView.groups[mImageListView.groups.Count - 1];
if (add && index == lastGroup.LastItemIndex + 1)
{
lastGroup.LastItemIndex++;
return;
}
// Insert into a group
List <ImageListViewGroup> emptyGroups = new List <ImageListViewGroup>();
foreach (ImageListViewGroup group in mImageListView.groups)
{
if (group.LastItemIndex < index)
{
continue;
}
else if (group.FirstItemIndex <= index && group.LastItemIndex >= index)
{
if (add)
{
group.LastItemIndex++;
}
else
{
group.LastItemIndex--;
}
}
else // if (group.FirstItemIndex > index)
{
if (add)
{
group.FirstItemIndex++;
group.LastItemIndex++;
}
else
{
group.FirstItemIndex--;
group.LastItemIndex--;
}
}
if (group.ItemCount == 0)
{
emptyGroups.Add(group);
}
}
// Purge empty groups
foreach (ImageListViewGroup group in emptyGroups)
{
mImageListView.groups.Remove(group);
}
}