protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x000F: //WM_PAINT
if (parent.FullyCustomHeader)
{
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.headerBackColor), r);
//If we have a valid event handler - call it
if (parent.DrawHeader != null && !parent.DefaultCustomDraw)
{
parent.DrawHeader(new DrawHeaderEventArgs(g, r,
itemRect.bottom - itemRect.top));
}
else
{
parent.DrawHeaderBorder(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 (ListColumn mm in parent.Columns)
{
if (mm.OwnerDraw)
{
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);
}
else
{
base.WndProc(ref m);
}
break;
case 0x0014: //WM_ERASEBKGND
//We don't need to do anything here in order to reduce flicker
if (parent.FullyCustomHeader)
{
break;
}
else
{
base.WndProc(ref m);
}
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 0x000F://WM_PAINT
if(parent.FullyCustomHeader)
{
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.headerBackColor),r);
//If we have a valid event handler - call it
if(parent.DrawHeader != null && !parent.DefaultCustomDraw)
parent.DrawHeader(new DrawHeaderEventArgs(g,r,
itemRect.bottom-itemRect.top));
else
parent.DrawHeaderBorder(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(ListColumn mm in parent.Columns)
{
if(mm.OwnerDraw)
{
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);
}
else
base.WndProc(ref m);
break;
case 0x0014://WM_ERASEBKGND
//We don't need to do anything here in order to reduce flicker
if(parent.FullyCustomHeader)
break;
else
base.WndProc(ref m);
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;
}
}