// Is focus set to the specified item
protected override bool IsFocused()
{
NativeMethods.LVGROUP_V6 groupInfo = new NativeMethods.LVGROUP_V6();
groupInfo.Init(Marshal.SizeOf(typeof(NativeMethods.LVGROUP_V6)));
groupInfo.iGroupID = _groupId;
groupInfo.mask = NativeMethods.LVGF_STATE;
groupInfo.stateMask = NativeMethods.LVGS_SUBSETLINKFOCUSED;
// Note: return code of GetGroupInfo() is not reliable.
XSendMessage.GetGroupInfo(_hwnd, ref groupInfo); // ignore return code.
return((groupInfo.state & NativeMethods.LVGS_SUBSETLINKFOCUSED) != 0);
}
// Returns the last child element in the raw hierarchy.
internal override ProxySimple GetLastChild()
{
// return last item in this group
GroupManager.GroupInfo groupInfo = GetGroupInfo(_hwnd, ID);
// List view groups in vista can have an extra link at the end that says
// something like "show all 11 items...". If one exists expose it as the last child.
if (_isComctrlV6OnOsVerV6orHigher)
{
NativeMethods.LVGROUP_V6 group = new NativeMethods.LVGROUP_V6();
group.Init(Marshal.SizeOf(typeof(NativeMethods.LVGROUP_V6)));
group.iGroupID = _groupID;
group.mask = NativeMethods.LVGF_STATE;
group.stateMask = NativeMethods.LVGS_SUBSETED;
// Note: return code of GetGroupInfo() is not reliable.
XSendMessage.GetGroupInfo(_hwnd, ref group); // ignore return code.
// if we are not subseted then the last item is a regular listitem so
// it is ok to fall through and let that be created. Otherwise we need to
// create the subset link proxy.
if ((group.state & NativeMethods.LVGS_SUBSETED) != 0)
{
int [] items = groupInfo._items;
if (groupInfo._count <= 0 || groupInfo._count > items.Length)
{
return(null);
}
int index = items [groupInfo._count - 1];
return(CreateGroupSubsetLink(index + 1));
}
}
if (groupInfo)
{
int [] items = groupInfo._items;
if (groupInfo._count <= 0 || groupInfo._count > items.Length)
{
return(null);
}
int index = items [groupInfo._count - 1];
return(CreateListViewItem(index));
}
return(null);
}
internal static bool IsCollapsed(IntPtr hwnd, int groupID)
{
bool isCollapsed = false;
NativeMethods.LVGROUP group = new NativeMethods.LVGROUP();
group.Init(Marshal.SizeOf(typeof(NativeMethods.LVGROUP)));
group.iGroupID = groupID;
group.mask = NativeMethods.LVGF_STATE;
group.stateMask = NativeMethods.LVGS_COLLAPSED;
// Note: return code of GetGroupInfo() is not reliable.
XSendMessage.GetGroupInfo(hwnd, ref group); // ignore return code.
isCollapsed = (group.state & NativeMethods.LVGS_COLLAPSED) != 0;
return(isCollapsed);
}
// Returns the next sibling element in the raw hierarchy.
// Peripheral controls have always negative values.
// Returns null if no next child
internal override ProxySimple GetNextSibling(ProxySimple child)
{
GroupManager.GroupInfo groupInfo = GetGroupInfo(_hwnd, ID);
if (groupInfo)
{
int [] items = groupInfo._items;
int current = child._item;
// find the index of the current lvitem
int nextLocation = groupInfo.IndexOf(current) + 1; //Array.IndexOf(items, current) + 1;
if (nextLocation <= 0)
{
// No more siblings
return(null);
}
if (nextLocation < groupInfo._count)
{
return(CreateListViewItem(items [nextLocation]));
}
// List view groups in vista can have an extra link at the end that says
// somthing like "show all 11 items..."
if (_isComctrlV6OnOsVerV6orHigher && nextLocation == groupInfo._count)
{
NativeMethods.LVGROUP_V6 group = new NativeMethods.LVGROUP_V6();
group.Init(Marshal.SizeOf(typeof(NativeMethods.LVGROUP_V6)));
group.iGroupID = _groupID;
group.mask = NativeMethods.LVGF_STATE;
group.stateMask = NativeMethods.LVGS_SUBSETED;
// Note: return code of GetGroupInfo() is not reliable.
XSendMessage.GetGroupInfo(_hwnd, ref group); // ignore return code.
// The items array holds the list items in this group. If we have a subset link we
// don't store it with the list items because it isn't really a list item. Instead we just
// create the subset link proxy with an item index one more than the last index.
if ((group.state & NativeMethods.LVGS_SUBSETED) != 0)
{
return(CreateGroupSubsetLink(items [groupInfo._count - 1] + 1));
}
}
}
return(null);
}
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// get focused element
internal static ProxySimple GetFocusInGroup(IntPtr hwnd, ProxyFragment parent)
{
int index = WindowsListView.GetItemNext(hwnd, -1, NativeMethods.LVNI_FOCUSED);
if (index != -1)
{
// get id of the group to which item belongs
NativeMethods.LVITEM_V6 item = new NativeMethods.LVITEM_V6();
item.mask = NativeMethods.LVIF_GROUPID;
item.iItem = index;
if (XSendMessage.GetItem(hwnd, ref item))
{
WindowsListViewGroup group = new WindowsListViewGroup(hwnd, parent, item.iGroupID);
return(new ListViewItem(hwnd, group, index));
}
}
else
{
// if none of the items have focus see if the focus is on the subset link
// this only exists in v6 comctrl on vista or later.
if (Misc.IsComctrlV6OnOsVerV6orHigher(hwnd))
{
int groupIndex = (int)Misc.ProxySendMessage(hwnd, NativeMethods.LVM_GETFOCUSEDGROUP, IntPtr.Zero, IntPtr.Zero);
// need to convert the item id to a group id
NativeMethods.LVGROUP_V6 groupInfo = new NativeMethods.LVGROUP_V6();
groupInfo.Init(Marshal.SizeOf(typeof(NativeMethods.LVGROUP_V6)));
groupInfo.mask = NativeMethods.LVGF_GROUPID;
unsafe
{
bool lresult = XSendMessage.XSend(hwnd, NativeMethods.LVM_GETGROUPINFOBYINDEX, new IntPtr(groupIndex), new IntPtr(&groupInfo), Marshal.SizeOf(typeof(NativeMethods.LVGROUP_V6)));
if (!lresult)
{
// no group for this item should never happen.
return(null);
}
}
int groupId = groupInfo.iGroupID;
groupInfo.Init(Marshal.SizeOf(typeof(NativeMethods.LVGROUP_V6)));
groupInfo.iGroupID = groupId;
groupInfo.mask = NativeMethods.LVGF_STATE;
groupInfo.stateMask = NativeMethods.LVGS_SUBSETLINKFOCUSED;
// Note: return code of GetGroupInfo() is not reliable.
XSendMessage.GetGroupInfo(hwnd, ref groupInfo); // ignore return code.
if ((groupInfo.state & NativeMethods.LVGS_SUBSETLINKFOCUSED) != 0)
{
GroupManager.GroupInfo groupManagerInfo = GetGroupInfo(hwnd, groupId);
int [] items = groupManagerInfo._items;
if (groupManagerInfo._count <= 0 || groupManagerInfo._count >= items.Length)
{
return(null);
}
int sslIndex = items [groupManagerInfo._count - 1];
// The items array holds the list items in this group. If we have a subset link we
// don't store it with the list items because it isn't really a list item. Instead we just
// create the subset link proxy with an item index one more than the last index.
WindowsListViewGroup group = new WindowsListViewGroup(hwnd, parent, groupId);
return(group.CreateGroupSubsetLink(sslIndex + 1));
}
else
{
return(new WindowsListViewGroup(hwnd, parent, groupId));
}
}
}
return(null);
}