/// <summary> Overridden window message processing. </summary>
protected override void WndProc(ref Message Msg)
{
if (Msg.Msg == ListViewWin32.WM_MOUSEMOVE)
{
int PosX = ListViewWin32.GET_X_LPARAM(( uint )Msg.LParam);
int PosY = ListViewWin32.GET_Y_LPARAM(( uint )Msg.LParam);
int ColumnStart = 0;
int ColumnEnd = 0;
CurrentColumnIndex = -1;
// Find on which column we should show the tooltip.
for (int ColumnIndex = 0; ColumnIndex < Parent.Columns.Count; ColumnIndex++)
{
int ColumnWidth = Parent.Columns[ColumnIndex].Width;
ColumnEnd = ColumnStart + ColumnWidth;
if (PosX >= ColumnStart && PosX < ColumnEnd)
{
CurrentColumnIndex = ColumnIndex;
break;
}
ColumnStart = ColumnEnd;
}
if (CurrentColumnIndex == -1)
{
HeaderToolTip.Hide(Parent);
}
else if (CurrentColumnIndex != LastColumnIndex)
{
ListViewWin32.TRACKMOUSEEVENT trackMouseEvent = new ListViewWin32.TRACKMOUSEEVENT(ListViewWin32.ETrackMouseEvent.TME_HOVER, Handle, ListViewWin32.HOVER_DEFAULT);
ListViewWin32.TrackMouseEvent(ref trackMouseEvent);
HeaderToolTip.Hide(Parent);
}
LastColumnIndex = CurrentColumnIndex;
}
else if (Msg.Msg == ListViewWin32.WM_MOUSELEAVE)
{
HeaderToolTip.Hide(Parent);
LastColumnIndex = -1;
}
else if (Msg.Msg == ListViewWin32.WM_MOUSEHOVER)
{
if (bAllowTooltips && CurrentColumnIndex != -1)
{
int PosX = ListViewWin32.GET_X_LPARAM(( uint )Msg.LParam);
int PosY = ListViewWin32.GET_Y_LPARAM(( uint )Msg.LParam);
// Show tooltip.
HeaderToolTip.Show(Parent.ColumnsTooltips[CurrentColumnIndex], Parent, PosX, PosY + 32);
}
}
// Default processing.
base.WndProc(ref Msg);
}
/// <summary> Default constructor. </summary>
public FListViewHeader(ListViewEx InParent)
{
Parent = InParent;
// Get the header control window.
IntPtr HeaderWindow = ListViewWin32.SendMessage(Parent.Handle, ListViewWin32.LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
AssignHandle(HeaderWindow);
// Only allow tooltips if data is valid.
bAllowTooltips = Parent.ColumnsTooltips.Count == Parent.Columns.Count;
// Assign tooltip to the parent control.
HeaderToolTip.SetToolTip(Parent, "ListViewEx");
}
/// <summary> Sets the sort arrow to a particular column in the list view. </summary>
/// <param name="ColumnToShowArrow"> Index of the column where the sort arrow will be displayed </param>
public void SetSortArrow(int ColumnToShowArrow, bool bSortModeAscending)
{
if (ListViewHeader == null)
{
return;
}
IntPtr ColumnHeader = ListViewHeader.Handle;
for (int ColumnIndex = 0; ColumnIndex < Columns.Count; ColumnIndex++)
{
IntPtr ColumnPtr = new IntPtr(ColumnIndex);
ListViewWin32.HDITEM ListViewColumn = new ListViewWin32.HDITEM();
ListViewColumn.mask = ListViewWin32.HDI_FORMAT;
ListViewWin32.SendMessageHeaderItem(ColumnHeader, ListViewWin32.HDM_GETITEM, ColumnPtr, ref ListViewColumn);
bool bIsSortArrowDown = ((ListViewColumn.fmt & ListViewWin32.HDF_SORTDOWN) == ListViewWin32.HDF_SORTDOWN);
bool bIsSortArrowUp = ((ListViewColumn.fmt & ListViewWin32.HDF_SORTUP) == ListViewWin32.HDF_SORTUP);
// Change the sort arrow to opposite direction.
if (ColumnToShowArrow == ColumnIndex)
{
if (bSortModeAscending)
{
ListViewColumn.fmt &= ~ListViewWin32.HDF_SORTDOWN;
ListViewColumn.fmt |= ListViewWin32.HDF_SORTUP;
}
else
{
ListViewColumn.fmt &= ~ListViewWin32.HDF_SORTUP;
ListViewColumn.fmt |= ListViewWin32.HDF_SORTDOWN;
}
}
else
{
ListViewColumn.fmt &= ~ListViewWin32.HDF_SORTDOWN & ~ListViewWin32.HDF_SORTUP;
}
ListViewWin32.SendMessageHeaderItem(ColumnHeader, ListViewWin32.HDM_SETITEM, ColumnPtr, ref ListViewColumn);
}
}
