protected override int DoDefaultPaint(ref DRAWITEMSTRUCT ds)
{
//Default paint
using (Graphics g = Graphics.FromHdc(ds.hDC))
using (Pen p = new Pen((ds.itemState & ODS.SELECTED) != 0 ? ColorInv(ForeColor) : ForeColor))
using (SolidBrush br = new SolidBrush((ds.itemState & ODS.SELECTED) != 0 ? ColorInv(ForeColor) : ForeColor))
{
if ((ds.itemState & ODS.SELECTED) != 0)
{
g.Clear(Color.FromArgb(BackColor.ToArgb() ^ 0xffffff));
}
else
{
g.Clear(BackColor);
}
Rectangle rc = new Rectangle(ds.rcItem.left, ds.rcItem.top, ds.rcItem.right - ds.rcItem.left, ds.rcItem.bottom - ds.rcItem.top);
StringFormat fmt = new StringFormat();
fmt.Alignment = fmt.LineAlignment = System.Drawing.StringAlignment.Center;
g.DrawString(Text, Font, br, rc, fmt);
rc.Inflate(-1, -1);
g.DrawRectangle(p, rc);
return(-1);
}
}
protected virtual int OnDrawItem(ref DRAWITEMSTRUCT ds)
{
if (DrawItemDelegate == null)
{
return(0);
}
return(DrawItemDelegate(this, ref ds));
}
protected override int OnDrawItem(IntPtr hWnd, WM msg, IntPtr wParam, IntPtr lParam)
{
DRAWITEMSTRUCT ds = (DRAWITEMSTRUCT)Marshal.PtrToStructure(lParam, typeof(DRAWITEMSTRUCT));
if (PaintDelegate != null)
{
using (Graphics g = Graphics.FromHdc(ds.hDC))
{
Rectangle rcPaint = (Rectangle)ds.rcItem;
PaintDelegate(this, g, rcPaint, ds.itemAction, ds.itemState);
return(0);
}
}
//Default paint
//System.Diagnostics.Debug.WriteLine(ds.itemState);
//SetTextMode(cd.hdc, TRANSPARENT);
//cd.clrText = 0xffffff;
return(DoDefaultPaint(ref ds));
}
/// <summary>
/// The messages WM_MEASUREITEM and WM_DRAWITEM are sent to the parent control rather than to the ListView itself.
/// They come here as WM_REFLECT + WM_MEASUREITEM and WM_REFLECT + WM_DRAWITEM
/// They are sent from Control.WmOwnerDraw() --> Control.ReflectMessageInternal()
/// </summary>
protected override void WndProc(ref Message k_Msg)
{
base.WndProc(ref k_Msg); // FIRST
switch (k_Msg.Msg)
{
case WM_SHOWWINDOW: // called when the ListView becomes visible
{
Debug.Assert(View == View.Details, "ListViewEx supports only Details view");
Debug.Assert(OwnerDraw == false, "In ListViewEx do not set OwnerDraw = true");
break;
}
case WM_REFLECT + WM_MEASUREITEM: // called once when the ListView is created, but only in Details view
{
mb_Measured = true;
// Overwrite itemHeight, which is the fifth integer in MEASUREITEMSTRUCT
Marshal.WriteInt32(k_Msg.LParam + 4 * sizeof(int), ms32_RowHeight);
k_Msg.Result = (IntPtr)1;
break;
}
case WM_REFLECT + WM_DRAWITEM: // called for each ListViewItem to be drawn
{
DRAWITEMSTRUCT k_Draw = (DRAWITEMSTRUCT)k_Msg.GetLParam(typeof(DRAWITEMSTRUCT));
using (Graphics i_Graph = Graphics.FromHdc(k_Draw.hDC))
{
ListViewItem i_Item = Items[k_Draw.itemID];
Color c_BackColor = i_Item.BackColor;
if (i_Item.Selected)
{
c_BackColor = SystemColors.Highlight;
}
if (!Enabled)
{
c_BackColor = SystemColors.Control;
}
using (SolidBrush i_BackBrush = new SolidBrush(c_BackColor))
{
// Erase the background of the entire row
i_Graph.FillRectangle(i_BackBrush, i_Item.Bounds);
}
for (int S = 0; S < i_Item.SubItems.Count; S++)
{
ListViewItem.ListViewSubItem i_SubItem = i_Item.SubItems[S];
// i_Item.SubItems[0].Bounds contains the entire row, rather than the first column only.
Rectangle k_Bounds = (S > 0) ? i_SubItem.Bounds : i_Item.GetBounds(ItemBoundsPortion.Label);
// You can use i_Item.ForeColor instead of i_SubItem.ForeColor to get the same behaviour as without OwnerDraw
Color c_ForeColor = i_SubItem.ForeColor;
if (i_Item.Selected)
{
c_ForeColor = SystemColors.HighlightText;
}
if (!Enabled)
{
c_ForeColor = SystemColors.ControlText;
}
TextFormatFlags e_Flags = TextFormatFlags.NoPrefix | TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter | TextFormatFlags.SingleLine;
switch (Columns[S].TextAlign)
{
case HorizontalAlignment.Center: e_Flags |= TextFormatFlags.HorizontalCenter; break;
case HorizontalAlignment.Right: e_Flags |= TextFormatFlags.Right; break;
}
TextRenderer.DrawText(i_Graph, i_SubItem.Text, i_SubItem.Font, k_Bounds, c_ForeColor, e_Flags);
}
}
break;
}
}
}
protected override int DoDefaultPaint(ref DRAWITEMSTRUCT ds)
{
return(base.DoDefaultPaint(ref ds));
}
protected override int OnDrawItem(IntPtr hWnd, WM msg, IntPtr wParam, IntPtr lParam)
{
DRAWITEMSTRUCT ds = (DRAWITEMSTRUCT)Marshal.PtrToStructure(lParam, typeof(DRAWITEMSTRUCT));
return(OnDrawItem(ref ds));
}
public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref DRAWITEMSTRUCT dis);
public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref DRAWITEMSTRUCT dis);
/// <summary>
/// Empty default paint routine
/// </summary>
/// <param name="ds"></param>
/// <returns></returns>
protected virtual int DoDefaultPaint(ref DRAWITEMSTRUCT ds)
{
return(0); // Not handled
}
