protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x000F: //WM_PAINT
Win32.RECT update = new Win32.RECT();
if (Win32.GetUpdateRect(m.HWnd, ref update, false) == 0)
{
break;
}
//Fill the paintstruct
Win32.PAINTSTRUCT ps = new Win32.PAINTSTRUCT();
IntPtr hdc = Win32.BeginPaint(m.HWnd, ref ps);
//Create graphics object from the hdc
Graphics g = Graphics.FromHdc(hdc);
//Get the non-item rectangle
int left = 0;
Win32.RECT itemRect = new Win32.RECT();
for (int i = 0; i < parent.Columns.Count; i++)
{
//HDM_GETITEMRECT
Win32.SendMessage(m.HWnd, 0x1200 + 7, i, ref itemRect);
left += itemRect.right - itemRect.left;
}
//parent.headerHeight = itemRect.bottom-itemRect.top;
if (left >= ps.rcPaint.left)
{
left = ps.rcPaint.left;
}
Rectangle r = new Rectangle(left, ps.rcPaint.top,
ps.rcPaint.right - left, ps.rcPaint.bottom - ps.rcPaint.top);
// Rectangle r1 = new Rectangle(ps.rcPaint.left, ps.rcPaint.top,
// ps.rcPaint.right-left, ps.rcPaint.bottom-ps.rcPaint.top);
g.FillRectangle(new SolidBrush(parent.BackColor), r);
/*//If we have a valid event handler - call it
* if(parent.DrawHeader != null)
* parent.DrawHeader(new DrawHeaderEventArgs(g,r,
* itemRect.bottom-itemRect.top));*/
//Now we have to check if we have owner-draw columns and fill
//the DRAWITEMSTRUCT appropriately
int counter = 0;
foreach (ColumnHeader mm in parent.Columns)
{
Win32.DRAWITEMSTRUCT dis = new Win32.DRAWITEMSTRUCT();
dis.ctrlType = 100; //ODT_HEADER
dis.hwnd = m.HWnd;
dis.hdc = hdc;
dis.itemAction = 0x0001; //ODA_DRAWENTIRE
dis.itemID = counter;
//Must find if some item is pressed
Win32.HDHITTESTINFO hi = new Win32.HDHITTESTINFO();
hi.pt.X = parent.PointToClient(MousePosition).X;
hi.pt.Y = parent.PointToClient(MousePosition).Y;
int hotItem = Win32.SendMessage(m.HWnd, 0x1200 + 6, 0, ref hi);
//If clicked on a divider - we don't have hot item
if (hi.flags == 0x0004 || hotItem != counter)
{
hotItem = -1;
}
if (hotItem != -1 && mouseDown)
{
dis.itemState = 0x0001; //ODS_SELECTED
}
else
{
dis.itemState = 0x0020;
}
//HDM_GETITEMRECT
Win32.SendMessage(m.HWnd, 0x1200 + 7, counter, ref itemRect);
dis.rcItem = itemRect;
//Send message WM_DRAWITEM
Win32.SendMessage(parent.Handle, 0x002B, 0, ref dis);
counter++;
}
Win32.EndPaint(m.HWnd, ref ps);
break;
case 0x0014: //WM_ERASEBKGND
//We don't need to do anything here in order to reduce flicker
// if(parent.FullyCustomHeader)
break;
case 0x0201: //WM_LBUTTONDOWN
mouseDown = true;
base.WndProc(ref m);
break;
case 0x0202: //WM_LBUTTONUP
mouseDown = false;
base.WndProc(ref m);
break;
case 0x1200 + 5: //HDM_LAYOUT
base.WndProc(ref m);
break;
/* case 0x0030://WM_SETFONT
* if(parent.IncreaseHeaderHeight > 0)
* {
* System.Drawing.Font f = new System.Drawing.Font(parent.Font.Name,
* parent.Font.SizeInPoints + parent.IncreaseHeaderHeight);
* m.WParam = f.ToHfont();
* }
* base.WndProc(ref m);
* break; */
default:
base.WndProc(ref m);
break;
}
}
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 522:
base.WndProc(ref m);
Scrolled();
break;
case 0xF: //WM_PAINT
base.WndProc(ref m);
// if ( this.View == View.Details && this.Columns.Count > 0 )
// {
// foreach (ColumnHeader h in LockedHeaders)
// {
// h.Width = 20;
// }
// }
Scrolled();
break;
case 5:
base.WndProc(ref m);
Scrolled();
break;
case 0x4E:
base.WndProc(ref m);
Win32.NMHDR nh = (Win32.NMHDR)Marshal.PtrToStructure(m.LParam, typeof(Win32.NMHDR));
// if (nh.code == -310)
// {
// if ( this.View == View.Details && this.Columns.Count > 0 )
// {
// foreach (ColumnHeader h in LockedHeaders)
// {
// h.Width = 20;
// }
// }
// }
if (nh.code == -310 ||
nh.code == -300 ||
nh.code == -320)
{
Scrolled();
}
break;
case 0x002B: //WM_DRAWITEM
//Get the DRAWITEMSTRUCT from the LParam of the message
Win32.DRAWITEMSTRUCT dis = (Win32.DRAWITEMSTRUCT)Marshal.PtrToStructure(
m.LParam, typeof(Win32.DRAWITEMSTRUCT));
//Check if this message comes from the header
if (dis.ctrlType == 100) //ODT_HEADER - it does come from the header
{
//Get the graphics from the hdc field of the DRAWITEMSTRUCT
Graphics g = Graphics.FromHdc(dis.hdc);
//Create a rectangle from the RECT struct
Rectangle r = new Rectangle(dis.rcItem.left, dis.rcItem.top, dis.rcItem.right -
dis.rcItem.left, dis.rcItem.bottom - dis.rcItem.top);
//Create new DrawItemState in its default state
DrawItemState d = DrawItemState.Default;
//Set the correct state for drawing
if (dis.itemState == 0x0001)
{
d = DrawItemState.Selected;
}
//Create the DrawItemEventArgs object
DrawItemEventArgs e = new DrawItemEventArgs(g, this.Font, r, dis.itemID, d);
//If we have a handler attached call it and we don't want the default drawing
OverrideDrawColumn(this.Columns[dis.itemID], e);
//Release the graphics object
g.Dispose();
}
break;
default:
base.WndProc(ref m);
break;
}
}
