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;
}
}
protected override void WndProc(ref Message m)
{
Win32.NMHEADER nm;
switch (m.Msg)
{
case 0x004E: //WM_NOTIFY
base.WndProc(ref m);
Win32.NMHDR nmhdr = (Win32.NMHDR)m.GetLParam(typeof(Win32.NMHDR));
switch (nmhdr.code)
{
case (int)Win32.NM.NM_CLICK - 320:
nm = (Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
if (ClickHeader != null)
{
sortColumn = nm.iItem;
if (sortOrder == 1)
{
sortOrder = -1;
}
else
{
sortOrder = 1;
}
ClickHeader(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
}
break;
case (0 - 300 - 26): //HDN_BEGINTRACK
nm = (Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
if (BeginDragHeaderDivider != null)
{
BeginDragHeaderDivider(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
}
break;
case (0 - 300 - 20): //HDN_ITEMCHANGING
nm = (Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
//Adjust the column width
Win32.RECT rect = new Win32.RECT();
//HDM_GETITEMRECT
Win32.SendMessage(header.Handle, 0x1200 + 7, nm.iItem, ref rect);
//Get the item height which is actually header's height
this.headerHeight = rect.bottom - rect.top;
//para pintar correctamente el progreso
//Debug.Write("Parte 1: id:" + nm.iItem + " left=" + rect.left + "\n");
this.m_headerleft[nm.iItem] = rect.left;
this.m_headerright[nm.iItem] = rect.right;
this.Columns[nm.iItem].Width = rect.right - rect.left;
if (DragHeaderDivider != null)
{
DragHeaderDivider(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
}
break;
case (0 - 300 - 27): //HDN_ENDTRACK
nm = (Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
if (EndDragHeaderDivider != null)
{
EndDragHeaderDivider(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
}
break;
// case (0-300-11): //HDN_ENDDRAG
// break;
}
break;
case (int)Win32.OCM.OCM_NOTIFY: //Reflected WM_NOTIFY message
Win32.NMHDR nmh = (Win32.NMHDR)m.GetLParam(typeof(Win32.NMHDR));
switch (nmh.code)
{
case (int)Win32.NM.NM_CUSTOMDRAW:
Win32.NMCUSTOMDRAW nmcd =
(Win32.NMCUSTOMDRAW)m.GetLParam(typeof(Win32.NMCUSTOMDRAW));
if (nmcd.hdr.hwndFrom != this.Handle)
{
break;
}
switch (nmcd.dwDrawStage)
{
case (int)Win32.CDDS.CDDS_PREPAINT:
m.Result = (IntPtr)Win32.CDRF.CDRF_NOTIFYITEMDRAW;
break;
case (int)Win32.CDDS.CDDS_ITEMPREPAINT:
m.Result = (IntPtr)Win32.CDRF.CDRF_NOTIFYITEMDRAW;
break;
case (int)(Win32.CDDS.CDDS_SUBITEM | Win32.CDDS.CDDS_ITEMPREPAINT):
try
{
Win32.NMLVCUSTOMDRAW nmlv = (Win32.NMLVCUSTOMDRAW)
m.GetLParam(typeof(Win32.NMLVCUSTOMDRAW));
if ((Columns[nmlv.iSubItem].subItemOwnerDraw) && (nmlv.nmcd.dwItemSpec < Items.Count))
{
Rectangle recgrande = base.GetItemRect(nmlv.nmcd.dwItemSpec);
Win32.RECT rc = new Win32.RECT();
if (nmlv.iSubItem > 0)
{
rc.top = nmlv.iSubItem;
rc.left = 0;
Win32.SendMessage(this.Handle, 0x1000 + 56, nmlv.nmcd.dwItemSpec, ref rc);
}
else
{
rc.top = 0;
rc.left = 2;
Win32.SendMessage(this.Handle, 0x1000 + 14, nmlv.nmcd.dwItemSpec, ref rc);
}
//Rectangle rec=new Rectangle(rc.left+1,rc.top,rc.right-rc.left-2, rc.bottom-rc.top-2);
Rectangle rec = new Rectangle(rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top);
//Point p=this.PointToClient(new Point(rc.left,rc.top));
//Point p2=this.PointToClient(new Point(rc.right,rc.bottom));
//Rectangle rec=new Rectangle(p.X,rc.top,p2.X-p.X,rc.bottom-rc.top-2);
Graphics g = Graphics.FromHdc(nmlv.nmcd.hdc);
OnDrawItem(nmlv.nmcd.dwItemSpec, nmlv.iSubItem, g, rec);
g.Dispose();
//Win32.ReleaseDC(nmcd.hdr.hwndFrom,nmlv.nmcd.hdc);
m.Result = (IntPtr)Win32.CDRF.CDRF_SKIPDEFAULT;
}
else
{
base.WndProc(ref m); //m.Result = (IntPtr)Win32.CDRF.CDRF_DODEFAULT;
}
Marshal.StructureToPtr(nmlv, m.LParam, true);
}
catch
{
base.WndProc(ref m);
}
break;
}
break;
default:
base.WndProc(ref m);
break;
}
break;
case 0x002B: //WM_DRAWITEM
try
{
//Get the DRAWITEMSTRUCT from the LParam of the message
Win32.DRAWITEMSTRUCT dis = (Win32.DRAWITEMSTRUCT)Marshal.PtrToStructure(
m.LParam, typeof(Win32.DRAWITEMSTRUCT));
//agregar aqui la posicion x para pintar bien el progreso.
//Debug.Write("parte3: id: " + dis.itemID + "\n");
this.m_headerleft[dis.itemID] = dis.rcItem.left;
this.m_headerright[dis.itemID] = dis.rcItem.right;
//Check if this message comes from the header
if (dis.ctrlType == 100) //ODT_HEADER - it do comes 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
if (DrawColumn != null && !defaultCustomDraw)
{
DrawColumn(this.Columns[dis.itemID], e);
}
else if (defaultCustomDraw)
{
DoMyCustomHeaderDraw(this.Columns[dis.itemID], e);
}
//Release the graphics object
g.Dispose();
}
}
catch
{
try
{
base.WndProc(ref m);
}
catch {}
}
break;
case 0x0002: //WM_DESTROY
//Release the handle associated with the header control window
header.ReleaseHandle();
base.WndProc(ref m);
break;
case 0x0014: //WM_ERASEBKGND
if (this.Items.Count == 0)
{
base.WndProc(ref m);
}
else
{
try
{
Brush backBrush = new SolidBrush(BackColor);
//up
Rectangle clientRect = this.ClientRectangle; //this.GetItemAt(0,0).Index
Rectangle rec = clientRect;
Graphics g = Graphics.FromHdc(m.WParam);
rec.X = clientRect.X;
rec.Y = clientRect.Y;
rec.Width = clientRect.Width;
rec.Height = this.HeaderHeight + 2;
g.FillRectangle(backBrush, rec);
//left
Rectangle itemRect = this.GetItemRect(0, ItemBoundsPortion.Entire);
rec.Width = itemRect.Left - clientRect.Left + 2;
rec.Height = clientRect.Height + itemRect.Height + 2;
if (rec.Width > 0)
{
g.FillRectangle(backBrush, rec);
}
//right
rec.X = itemRect.Right;
rec.Y = clientRect.Top;
rec.Width = clientRect.Width - itemRect.Width;
rec.Height = clientRect.Height;
g.FillRectangle(backBrush, rec);
//Debug.WriteLine(rec.ToString());
//bottom
itemRect = this.GetItemRect(this.Items.Count - 1, ItemBoundsPortion.Entire);
rec.X = clientRect.Left;
rec.Y = itemRect.Bottom;
rec.Width = clientRect.Width;
rec.Height = clientRect.Height - rec.Y + clientRect.Width;
if (rec.Height > 0)
{
g.FillRectangle(backBrush, rec);
}
}
catch
{
base.WndProc(ref m);
}
}
break;
default:
try //Message 0x7b WM_CONTEXTMENU can cause exceptions if control is invisible
{
base.WndProc(ref m);
}
catch //(Exception e)
{
//Debug.WriteLine(e.ToString());
Visible = true;
}
break;
}
}
protected override void WndProc(ref Message m)
{
Win32.NMHEADER nm;
switch(m.Msg)
{
case 0x004E://WM_NOTIFY
base.WndProc(ref m);
Win32.NMHDR nmhdr = (Win32.NMHDR)m.GetLParam(typeof(Win32.NMHDR));
switch(nmhdr.code)
{
case (int)Win32.NM.NM_CLICK-320:
nm=(Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
if (ClickHeader!=null)
{
sortColumn=nm.iItem;
if (sortOrder==1) sortOrder=-1;
else sortOrder=1;
ClickHeader(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
}
break;
case (0-300-26)://HDN_BEGINTRACK
nm=(Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
if(BeginDragHeaderDivider != null)
BeginDragHeaderDivider(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
break;
case (0-300-20)://HDN_ITEMCHANGING
nm=(Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
//Adjust the column width
Win32.RECT rect = new Win32.RECT();
//HDM_GETITEMRECT
Win32.SendMessage(header.Handle, 0x1200+7, nm.iItem, ref rect);
//Get the item height which is actually header's height
this.headerHeight = rect.bottom-rect.top;
//para pintar correctamente el progreso
//Debug.Write("Parte 1: id:" + nm.iItem + " left=" + rect.left + "\n");
this.m_headerleft[nm.iItem]=rect.left;
this.m_headerright[nm.iItem]=rect.right;
this.Columns[nm.iItem].Width = rect.right - rect.left;
if(DragHeaderDivider != null)
DragHeaderDivider(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
break;
case (0-300-27)://HDN_ENDTRACK
nm=(Win32.NMHEADER)m.GetLParam(typeof(Win32.NMHEADER));
if(EndDragHeaderDivider != null)
EndDragHeaderDivider(this.Columns[nm.iItem],
new HeaderEventArgs(nm.iItem, nm.iButton));
break;
// case (0-300-11): //HDN_ENDDRAG
// break;
}
break;
case (int)Win32.OCM.OCM_NOTIFY://Reflected WM_NOTIFY message
Win32.NMHDR nmh = (Win32.NMHDR)m.GetLParam(typeof(Win32.NMHDR));
switch(nmh.code)
{
case (int)Win32.NM.NM_CUSTOMDRAW:
Win32.NMCUSTOMDRAW nmcd =
(Win32.NMCUSTOMDRAW)m.GetLParam(typeof(Win32.NMCUSTOMDRAW));
if(nmcd.hdr.hwndFrom != this.Handle)
break;
switch(nmcd.dwDrawStage)
{
case (int)Win32.CDDS.CDDS_PREPAINT:
m.Result = (IntPtr)Win32.CDRF.CDRF_NOTIFYITEMDRAW;
break;
case (int)Win32.CDDS.CDDS_ITEMPREPAINT:
m.Result = (IntPtr)Win32.CDRF.CDRF_NOTIFYITEMDRAW;
break;
case (int)(Win32.CDDS.CDDS_SUBITEM|Win32.CDDS.CDDS_ITEMPREPAINT):
try
{
Win32.NMLVCUSTOMDRAW nmlv = (Win32.NMLVCUSTOMDRAW)
m.GetLParam(typeof(Win32.NMLVCUSTOMDRAW));
if ((Columns[nmlv.iSubItem].subItemOwnerDraw)&&(nmlv.nmcd.dwItemSpec<Items.Count))
{
Rectangle recgrande=base.GetItemRect(nmlv.nmcd.dwItemSpec);
Win32.RECT rc=new Win32.RECT();
if (nmlv.iSubItem>0)
{
rc.top=nmlv.iSubItem;
rc.left=0;
Win32.SendMessage(this.Handle,0x1000 + 56,nmlv.nmcd.dwItemSpec,ref rc);
}
else
{
rc.top=0;
rc.left=2;
Win32.SendMessage(this.Handle,0x1000 + 14,nmlv.nmcd.dwItemSpec,ref rc);
}
//Rectangle rec=new Rectangle(rc.left+1,rc.top,rc.right-rc.left-2, rc.bottom-rc.top-2);
Rectangle rec=new Rectangle(rc.left,rc.top,rc.right-rc.left, rc.bottom-rc.top);
//Point p=this.PointToClient(new Point(rc.left,rc.top));
//Point p2=this.PointToClient(new Point(rc.right,rc.bottom));
//Rectangle rec=new Rectangle(p.X,rc.top,p2.X-p.X,rc.bottom-rc.top-2);
Graphics g = Graphics.FromHdc(nmlv.nmcd.hdc);
OnDrawItem(nmlv.nmcd.dwItemSpec,nmlv.iSubItem,g,rec);
g.Dispose();
//Win32.ReleaseDC(nmcd.hdr.hwndFrom,nmlv.nmcd.hdc);
m.Result = (IntPtr)Win32.CDRF.CDRF_SKIPDEFAULT;
}
else
base.WndProc(ref m);//m.Result = (IntPtr)Win32.CDRF.CDRF_DODEFAULT;
Marshal.StructureToPtr(nmlv,m.LParam,true);
}
catch
{
base.WndProc(ref m);
}
break;
}
break;
default:
base.WndProc(ref m);
break;
}
break;
case 0x002B://WM_DRAWITEM
try
{
//Get the DRAWITEMSTRUCT from the LParam of the message
Win32.DRAWITEMSTRUCT dis = (Win32.DRAWITEMSTRUCT)Marshal.PtrToStructure(
m.LParam,typeof(Win32.DRAWITEMSTRUCT));
//agregar aqui la posicion x para pintar bien el progreso.
//Debug.Write("parte3: id: " + dis.itemID + "\n");
this.m_headerleft[dis.itemID] = dis.rcItem.left;
this.m_headerright[dis.itemID] = dis.rcItem.right;
//Check if this message comes from the header
if(dis.ctrlType == 100)//ODT_HEADER - it do comes 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
if(DrawColumn != null && !defaultCustomDraw)
DrawColumn(this.Columns[dis.itemID], e);
else if(defaultCustomDraw)
DoMyCustomHeaderDraw(this.Columns[dis.itemID],e);
//Release the graphics object
g.Dispose();
}
}
catch
{
try
{
base.WndProc(ref m);
}
catch{}
}
break;
case 0x0002://WM_DESTROY
//Release the handle associated with the header control window
header.ReleaseHandle();
base.WndProc(ref m);
break;
case 0x0014://WM_ERASEBKGND
if (this.Items.Count==0)
base.WndProc(ref m);
else
{
try
{
Brush backBrush=new SolidBrush(BackColor);
//up
Rectangle clientRect=this.ClientRectangle;//this.GetItemAt(0,0).Index
Rectangle rec=clientRect;
Graphics g = Graphics.FromHdc(m.WParam);
rec.X=clientRect.X;
rec.Y=clientRect.Y;
rec.Width=clientRect.Width;
rec.Height=this.HeaderHeight+2;
g.FillRectangle(backBrush,rec);
//left
Rectangle itemRect=this.GetItemRect(0,ItemBoundsPortion.Entire);
rec.Width=itemRect.Left-clientRect.Left+2;
rec.Height=clientRect.Height+itemRect.Height+2;
if (rec.Width>0)
{
g.FillRectangle(backBrush,rec);
}
//right
rec.X=itemRect.Right;
rec.Y=clientRect.Top;
rec.Width=clientRect.Width-itemRect.Width;
rec.Height=clientRect.Height;
g.FillRectangle(backBrush,rec);
//Debug.WriteLine(rec.ToString());
//bottom
itemRect=this.GetItemRect(this.Items.Count-1,ItemBoundsPortion.Entire);
rec.X=clientRect.Left;
rec.Y=itemRect.Bottom;
rec.Width=clientRect.Width;
rec.Height=clientRect.Height-rec.Y+clientRect.Width;
if (rec.Height>0)
{
g.FillRectangle(backBrush,rec);
}
}
catch
{
base.WndProc(ref m);
}
}
break;
default:
try //Message 0x7b WM_CONTEXTMENU can cause exceptions if control is invisible
{
base.WndProc(ref m);
}
catch//(Exception e)
{
//Debug.WriteLine(e.ToString());
Visible=true;
}
break;
}
}
