/// <summary>
/// Get the current state of this group from the underlying control
/// </summary>
protected int SetState(GroupState state, GroupState stateMask)
{
NativeMethods.LVGROUP2 group = new NativeMethods.LVGROUP2();
group.cbSize = ((uint)Marshal.SizeOf(typeof(NativeMethods.LVGROUP2)));
group.mask = (uint)GroupMask.LVGF_STATE;
group.state = (uint)state;
group.stateMask = (uint)stateMask;
return(NativeMethods.SetGroupInfo(this.ListView, this.GroupId, group));
}
/// <summary>
/// Create a native LVGROUP structure that matches this group
/// </summary>
internal NativeMethods.LVGROUP2 AsNativeGroup(bool withId)
{
NativeMethods.LVGROUP2 group = new NativeMethods.LVGROUP2();
group.cbSize = ((uint)Marshal.SizeOf(typeof(NativeMethods.LVGROUP2)));
group.mask = (uint)(GroupMask.LVGF_HEADER ^ GroupMask.LVGF_ALIGN ^ GroupMask.LVGF_STATE);
group.pszHeader = this.Header;
group.uAlign = (uint)this.HeaderAlignment;
group.stateMask = (uint)this.StateMask;
group.state = (uint)this.State;
if (withId)
{
group.iGroupId = this.GroupId;
group.mask ^= (uint)GroupMask.LVGF_GROUPID;
}
if (!String.IsNullOrEmpty(this.Footer))
{
group.pszFooter = this.Footer;
group.mask ^= (uint)GroupMask.LVGF_FOOTER;
}
if (!String.IsNullOrEmpty(this.Subtitle))
{
group.pszSubtitle = this.Subtitle;
group.mask ^= (uint)GroupMask.LVGF_SUBTITLE;
}
if (!String.IsNullOrEmpty(this.Task))
{
group.pszTask = this.Task;
group.mask ^= (uint)GroupMask.LVGF_TASK;
}
if (!String.IsNullOrEmpty(this.TopDescription))
{
group.pszDescriptionTop = this.TopDescription;
group.mask ^= (uint)GroupMask.LVGF_DESCRIPTIONTOP;
}
if (!String.IsNullOrEmpty(this.BottomDescription))
{
group.pszDescriptionBottom = this.BottomDescription;
group.mask ^= (uint)GroupMask.LVGF_DESCRIPTIONBOTTOM;
}
int imageIndex = this.GetImageIndex(this.TitleImage);
if (imageIndex >= 0)
{
group.iTitleImage = imageIndex;
group.mask ^= (uint)GroupMask.LVGF_TITLEIMAGE;
}
imageIndex = this.GetImageIndex(this.ExtendedImage);
if (imageIndex >= 0)
{
group.iExtendedImage = imageIndex;
group.mask ^= (uint)GroupMask.LVGF_EXTENDEDIMAGE;
}
if (!String.IsNullOrEmpty(this.SubsetTitle))
{
group.pszSubsetTitle = this.SubsetTitle;
group.mask ^= (uint)GroupMask.LVGF_SUBSET;
}
if (this.VirtualItemCount > 0)
{
group.cItems = this.VirtualItemCount;
group.mask ^= (uint)GroupMask.LVGF_ITEMS;
}
return(group);
}