重載 DrawItem 函數(shù)或Onpaint函數(shù)
void CListCtrlCl::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
// 重繪網(wǎng)格線 [7/12/2013 dell]
const MSG *msg = GetCurrentMessage();
DefWindowProc( msg->message, msg->wParam, msg->lParam );
// Draw the lines only for LVS_REPORT mode
if( (GetStyle() & LVS_TYPEMASK) == LVS_REPORT )
{
// Get the number of columns
CClientDC dc(this );
CHeaderCtrl* pHeader = (CHeaderCtrl*)GetDlgItem(0);
int nColumnCount = pHeader->GetItemCount();
// The bottom of the header corresponds to the top of the line
RECT rect, rectCol;
pHeader->GetClientRect( &rect );
int top = rect.bottom;
// Now get the client rect so we know the line length and
// when to stop
GetClientRect( &rect );
if( !GetItemRect( 1, &rectCol, LVIR_BOUNDS ))
return;
int height1 = rectCol.bottom - rectCol.top;
// The border of the column is offset by the horz scroll
int borderx = 0 - GetScrollPos( SB_HORZ );
for( int i = 0; i < nColumnCount; i++ )
{
// Get the next border
borderx += GetColumnWidth( i );
// if next border is outside client area, break out
if( borderx >= rect.right ) break;
// Draw the line.
dc.MoveTo( borderx-1, top/*top*/);
dc.LineTo( borderx-1, (2+lpDrawItemStruct->itemID)*height1/*rect.bottom*/ );
}
// Draw the horizontal grid lines
// First get the height
if( !GetItemRect( 0, &rect, LVIR_BOUNDS ))
return;
int height = rect.bottom - rect.top;
GetClientRect( &rect );
int width = rect.right;
for(int i = 1; i <= lpDrawItemStruct->itemID+1; i++ )
{
dc.MoveTo( 0, top + height*i);
dc.LineTo( width, top + height*i );
}
}
}
本文轉(zhuǎn)自：http://www.codeguru.com/cpp/controls/listview/gridlines/article.php/c963/Drawing-horizontal-and-vertical-gridlines.htm
posted on 2013-07-12 11:10
王海光 閱讀(2654)
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