797 lines
17 KiB
C++
797 lines
17 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1996 - 1999.
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//
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// File: lview.cxx
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//
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// Contents:
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//
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// History: 15 Aug 1996 DLee Created
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//
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//--------------------------------------------------------------------------
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#include "pch.cxx"
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#pragma hdrstop
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//
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// Window procedure for ListView
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//
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LRESULT WINAPI ListViewWndProc(
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HWND hwnd,
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UINT msg,
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WPARAM wParam,
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LPARAM lParam)
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{
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CListView *pControl = (CListView *) GetWindowLongPtr(hwnd, 0);
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LRESULT lRet = 0;
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switch (msg)
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{
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case WM_CREATE :
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pControl = new CListView;
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pControl->Create (GetParent(hwnd), hwnd);
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SetWindowLongPtr (hwnd, 0, (LONG_PTR) pControl);
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break;
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case WM_DESTROY :
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delete pControl;
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lRet = DefWindowProc(hwnd, msg, wParam, lParam);
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break;
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case WM_SETFONT:
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pControl->SetFont ((HFONT)wParam);
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break;
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case WM_SETFOCUS:
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pControl->SetFocus();
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lRet = DefWindowProc(hwnd, msg, wParam, lParam);
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break;
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case wmInsertItem:
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pControl->InsertItem ((int)lParam);
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break;
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case wmDeleteItem:
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pControl->DeleteItem ((int)lParam);
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break;
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case wmUpdateItem:
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pControl->InvalidateItem ((int)lParam);
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break;
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case wmSetCountBefore:
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pControl->SetCountBefore ((int)lParam);
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break;
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case wmSetCount:
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pControl->SetTotalCount ((int)lParam);
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break;
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case wmResetContents:
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pControl->ResetContents();
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break;
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case WM_SIZE:
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pControl->Size (wParam, LOWORD(lParam), HIWORD(lParam));
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break;
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case WM_PAINT:
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{
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PAINTSTRUCT paint;
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BeginPaint ( hwnd, &paint );
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pControl->Paint (paint);
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EndPaint(hwnd, &paint );
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}
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break;
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case WM_LBUTTONUP:
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pControl->ButtonUp(HIWORD(lParam));
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break;
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case WM_LBUTTONDOWN:
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pControl->ButtonDown(HIWORD(lParam));
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break;
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case WM_LBUTTONDBLCLK:
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SendMessage (pControl->Parent(),
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WM_COMMAND,
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MAKEWPARAM(idListChild, LBN_DBLCLK),
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(LPARAM) hwnd);
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break;
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case WM_KEYDOWN:
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pControl->KeyDown ((int)wParam);
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break;
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case WM_VSCROLL:
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pControl->Vscroll ((int)LOWORD(wParam), (int)HIWORD(wParam));
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break;
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case WM_MOUSEWHEEL :
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lRet = pControl->MouseWheel( hwnd, wParam, lParam );
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break;
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case wmContextMenuHitTest:
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lRet = pControl->ContextMenuHitTest( wParam, lParam );
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break;
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default :
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lRet = DefWindowProc(hwnd, msg, wParam, lParam);
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break;
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}
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return lRet;
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} //ListViewWndProc
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CListView::CListView ()
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: _hwndParent(0),
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_hwnd(0),
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_cBefore(0),
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_cTotal (0),
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_cx(0),
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_cy(0),
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_cyLine(1),
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_cLines(0),
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_hfont(0),
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_iWheelRemainder(0)
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{}
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LRESULT CListView::MouseWheel(
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HWND hwnd,
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WPARAM wParam,
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LPARAM lParam )
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{
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// forward what we don't process
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if ( wParam & ( MK_SHIFT | MK_CONTROL ) )
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return DefWindowProc( hwnd, WM_MOUSEWHEEL, wParam, lParam );
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// add the current scroll to the remainder from last time
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int iDelta = (int) (short) HIWORD( wParam );
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iDelta += _iWheelRemainder;
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// if there isn't enough to process this time, just return
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if ( abs( iDelta ) < WHEEL_DELTA )
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{
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_iWheelRemainder = iDelta;
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return 0;
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}
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// compute the remainder and amount to scroll
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_iWheelRemainder = ( iDelta % WHEEL_DELTA );
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iDelta /= WHEEL_DELTA;
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BOOL fDown;
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if ( iDelta < 0 )
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{
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fDown = TRUE;
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iDelta = -iDelta;
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}
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else
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fDown = FALSE;
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// get the # of lines to scroll per WHEEL_DELTA
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int cLines;
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SystemParametersInfo( SPI_GETWHEELSCROLLLINES, 0, &cLines, 0 );
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if ( 0 == cLines )
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return 0;
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int cVisibleLines = _cLines;
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// if scrolling a page, do so. don't scroll more than one page
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if ( WHEEL_PAGESCROLL == cLines )
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iDelta = __max( 1, (cVisibleLines - 1) );
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else
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{
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iDelta *= cLines;
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if ( iDelta >= cVisibleLines )
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iDelta = __max( 1, (cVisibleLines - 1) );
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}
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// phew. do the scroll
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if ( 0 != iDelta )
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{
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if ( fDown )
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_GoDown( iDelta );
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else
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_GoUp( iDelta );
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}
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return iDelta;
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} //MouseWheel
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LRESULT CListView::ContextMenuHitTest(
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WPARAM wParam,
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LPARAM lParam )
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{
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POINT pt;
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// cast required to sign extend [multimon bug]
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pt.x = (LONG)(short)LOWORD( lParam );
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pt.y = (LONG)(short)HIWORD( lParam );
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RECT rc;
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GetWindowRect( _hwnd, &rc );
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// did they click in the window?
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if ( !PtInRect( &rc, pt ) )
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return -1;
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// convert y to window view coordinates
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int vy = pt.y - rc.top;
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// did they click on a line in the window?
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int line = vy / _cyLine;
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int newLine = line;
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if ( line >= _cLines || line >= _cTotal )
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return -1;
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// make this line the current selection
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ButtonDown( vy );
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return line;
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} //ContextMenuHitTest
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//
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// Create
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//
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void CListView::Create (HWND hwndParent, HWND hwnd)
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{
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_hwndParent = hwndParent;
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_hwnd = hwnd;
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MEASUREITEMSTRUCT measure;
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measure.CtlType = odtListView;
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//
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// Owner: Measure item!
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//
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SendMessage (_hwndParent, wmMeasureItem, 0, (LPARAM) &measure);
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_cyLine = measure.itemHeight;
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} //Create
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//
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// Key Down
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//
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void CListView::KeyDown (int nKey)
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{
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switch (nKey)
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{
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case ' ' :
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ButtonDown( 0 );
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break;
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case 11:
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case 13:
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// treat ENTER as a double-click
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//
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// Owner: Double click!
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//
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SendMessage (_hwndParent, WM_COMMAND, MAKEWPARAM(idListChild, LBN_DBLCLK), (LPARAM) _hwnd);
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break;
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//
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// Translate keystrokes into scrolling actions
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//
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case VK_HOME:
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SendMessage (_hwnd, WM_VSCROLL, SB_TOP, 0L);
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break;
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case VK_END:
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SendMessage (_hwnd, WM_VSCROLL, SB_BOTTOM, 0L);
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break;
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case VK_PRIOR:
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SendMessage (_hwnd, WM_VSCROLL, SB_PAGEUP, 0L);
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break;
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case VK_NEXT:
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SendMessage (_hwnd, WM_VSCROLL, SB_PAGEDOWN, 0L);
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break;
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case VK_UP:
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SelectUp ();
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break;
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case VK_DOWN:
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SelectDown ();
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break;
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}
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} //KeyDown
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void CListView::UpdateHighlight(
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int oldLine,
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int newLine )
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{
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// unhighlight
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if ( -1 != oldLine )
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RefreshRow( oldLine );
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// highlight
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if ( oldLine != newLine )
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RefreshRow( newLine );
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UpdateWindow (_hwnd);
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} //UpdateHighlight
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void CListView::SelectUp ()
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{
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int newLine;
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if ( SendMessage( _hwndParent, wmListNotify, listSelectUp, (LPARAM)&newLine ))
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UpdateHighlight( newLine + 1, newLine );
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} //SelectUp
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void CListView::SelectDown ()
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{
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int newLine;
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if ( SendMessage( _hwndParent, wmListNotify, listSelectDown, (LPARAM)&newLine ))
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UpdateHighlight( newLine - 1, newLine );
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} //SelectDown
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//
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// Button up (select)
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//
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void CListView::ButtonUp (int y)
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{
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}
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void CListView::ButtonDown (int y)
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{
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int line = y / _cyLine;
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int newLine = line;
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if (line >= _cLines)
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return;
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//
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// Owner: Selection made!
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//
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if (SendMessage (_hwndParent, wmListNotify, listSelect, (LPARAM)&line ))
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UpdateHighlight( line, newLine );
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::SetFocus (_hwnd);
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} //ButtonDown
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void CListView::SetFocus()
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{
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//
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// Owner: Focus!
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//
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SendMessage (_hwndParent, WM_COMMAND, MAKEWPARAM(idListChild, LBN_SETFOCUS), (LPARAM) _hwnd);
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} //SetFocus
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//
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// Size
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//
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void CListView::Size (WPARAM flags, int cx, int cy)
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{
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int cxOld = _cx;
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int cyOld = _cy;
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_cx = cx;
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_cy = cy;
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BOOL fInvalidate = FALSE;
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if (cy != cyOld)
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{
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_cLines = cy / _cyLine;
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//
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// Owner: Size!
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//
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long cRows = _cLines;
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fInvalidate = (BOOL)SendMessage(_hwndParent, wmListNotify, listSize, (LPARAM) &cRows);
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}
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// Don't repaint the common area
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RECT rect;
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rect.top = 0;
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rect.left = 0;
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rect.bottom = min (cy, cyOld);
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rect.right = min (cx, cxOld);
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// no need -- user does this for free, and it causes repaint bugs
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// ValidateRect (_hwnd, &rect );
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if (cy != cyOld)
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{
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if ( fInvalidate )
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InvalidateAndUpdateScroll();
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else
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UpdateScroll();
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}
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} //Size
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//
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// Paint
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//
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void CListView::Paint (PAINTSTRUCT& paint)
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{
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RECT& rect = paint.rcPaint;
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int lineStart = rect.top / _cyLine;
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int lineEnd = (rect.bottom + _cyLine - 1) / _cyLine;
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DRAWITEMSTRUCT draw;
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draw.hwndItem = _hwnd;
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draw.itemAction = ODA_DRAWENTIRE;
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HDC hdc = paint.hdc;
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draw.hDC = hdc;
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HFONT hfontOld = (HFONT) SelectObject (hdc, _hfont);
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for (int i = lineStart; i < lineEnd; i++)
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{
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draw.itemState = 0;
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if ( GetFocus() == _hwnd )
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draw.itemState |= ODS_FOCUS;
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draw.itemID = i;
|
||
|
|
draw.rcItem.top = 0;
|
||
|
|
draw.rcItem.left = 0;
|
||
|
|
draw.rcItem.bottom = _cyLine;
|
||
|
|
draw.rcItem.right = _cx;
|
||
|
|
|
||
|
|
SetViewportOrgEx( hdc, 0, i * _cyLine, 0 );
|
||
|
|
//
|
||
|
|
// Owner: Draw item!
|
||
|
|
//
|
||
|
|
SendMessage (_hwndParent, wmDrawItem, 0, (LPARAM)&draw);
|
||
|
|
}
|
||
|
|
SelectObject (hdc, hfontOld);
|
||
|
|
} //Paint
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set Font
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::SetFont (HFONT hfontNew)
|
||
|
|
{
|
||
|
|
_hfont = hfontNew;
|
||
|
|
MEASUREITEMSTRUCT measure;
|
||
|
|
measure.CtlType = odtListView;
|
||
|
|
//
|
||
|
|
// Owner: Measure item
|
||
|
|
//
|
||
|
|
SendMessage (_hwndParent, wmMeasureItem, 0, (LPARAM) &measure);
|
||
|
|
_cyLine = measure.itemHeight;
|
||
|
|
long cRows = (_cy + _cyLine - 1) / _cyLine;
|
||
|
|
_cLines = cRows;
|
||
|
|
//
|
||
|
|
// Owner: Size
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listSize, (LPARAM) &cRows);
|
||
|
|
InvalidateAndUpdateScroll();
|
||
|
|
} //SetFont
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Scrolling
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::Vscroll ( int action, int nPos)
|
||
|
|
{
|
||
|
|
switch (action)
|
||
|
|
{
|
||
|
|
case SB_LINEUP:
|
||
|
|
LineUp ();
|
||
|
|
break;
|
||
|
|
case SB_LINEDOWN:
|
||
|
|
LineDown ();
|
||
|
|
break;
|
||
|
|
case SB_THUMBTRACK:
|
||
|
|
// don't refresh when thumb dragging
|
||
|
|
// over many hits (too expensive)
|
||
|
|
break;
|
||
|
|
|
||
|
|
case SB_THUMBPOSITION:
|
||
|
|
ScrollPos (nPos);
|
||
|
|
break;
|
||
|
|
case SB_PAGEDOWN:
|
||
|
|
PageDown ();
|
||
|
|
break;
|
||
|
|
case SB_PAGEUP:
|
||
|
|
PageUp ();
|
||
|
|
break;
|
||
|
|
case SB_TOP:
|
||
|
|
Top ();
|
||
|
|
break;
|
||
|
|
case SB_BOTTOM:
|
||
|
|
Bottom ();
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
} //VScroll
|
||
|
|
|
||
|
|
void CListView::LineUp ()
|
||
|
|
{
|
||
|
|
long cLine = 1;
|
||
|
|
//
|
||
|
|
// Owner: Line up!
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listScrollLineUp, (LPARAM) &cLine);
|
||
|
|
if (cLine == 1)
|
||
|
|
{
|
||
|
|
if (_cBefore != 0)
|
||
|
|
_cBefore--;
|
||
|
|
|
||
|
|
// Force scroll and redraw
|
||
|
|
RECT rect;
|
||
|
|
GetClientRect (_hwnd, &rect);
|
||
|
|
MyScrollWindow (_hwnd, 0, _cyLine, &rect, &rect);
|
||
|
|
UpdateScroll();
|
||
|
|
}
|
||
|
|
} //LineUp
|
||
|
|
|
||
|
|
void CListView::LineDown ()
|
||
|
|
{
|
||
|
|
long cLine = 1;
|
||
|
|
//
|
||
|
|
// Owner: Line down!
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listScrollLineDn, (LPARAM) &cLine);
|
||
|
|
if (cLine == 1)
|
||
|
|
{
|
||
|
|
RECT rect;
|
||
|
|
GetClientRect (_hwnd, &rect);
|
||
|
|
MyScrollWindow (_hwnd, 0, -_cyLine, &rect, &rect);
|
||
|
|
_cBefore++;
|
||
|
|
UpdateScroll();
|
||
|
|
}
|
||
|
|
} //LineDown
|
||
|
|
|
||
|
|
void CListView::_GoUp(
|
||
|
|
long cToGo )
|
||
|
|
{
|
||
|
|
CWaitCursor wait;
|
||
|
|
|
||
|
|
long count = cToGo;
|
||
|
|
|
||
|
|
count = __min( count, _cBefore );
|
||
|
|
|
||
|
|
//
|
||
|
|
// Owner: Page up!
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listScrollPageUp, (LPARAM) &count);
|
||
|
|
|
||
|
|
// _cBefore is approximate; don't give up if it is too big
|
||
|
|
|
||
|
|
if ( 0 == count )
|
||
|
|
{
|
||
|
|
if ( _cBefore > 0 )
|
||
|
|
count = _cBefore - 1;
|
||
|
|
else
|
||
|
|
count = 1; // worst case; scroll up one line
|
||
|
|
|
||
|
|
SendMessage( _hwndParent,
|
||
|
|
wmListNotify,
|
||
|
|
listScrollPageUp,
|
||
|
|
(LPARAM) &count );
|
||
|
|
}
|
||
|
|
|
||
|
|
// gee, we're having a bad hair day
|
||
|
|
|
||
|
|
if ( 0 == count )
|
||
|
|
{
|
||
|
|
count = 1; // worst case; scroll up one line
|
||
|
|
|
||
|
|
SendMessage( _hwndParent,
|
||
|
|
wmListNotify,
|
||
|
|
listScrollPageUp,
|
||
|
|
(LPARAM) &count );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( 0 != count )
|
||
|
|
{
|
||
|
|
// count == number of lines open at the top
|
||
|
|
_cBefore -= count;
|
||
|
|
if (_cBefore < 0)
|
||
|
|
_cBefore = 0;
|
||
|
|
InvalidateAndUpdateScroll();
|
||
|
|
}
|
||
|
|
} //_GoUp
|
||
|
|
|
||
|
|
void CListView::PageUp ()
|
||
|
|
{
|
||
|
|
_GoUp( _cLines - 1 );
|
||
|
|
} //PageUp
|
||
|
|
|
||
|
|
void CListView::_GoDown(
|
||
|
|
long cToGo )
|
||
|
|
{
|
||
|
|
CWaitCursor wait;
|
||
|
|
|
||
|
|
long count = cToGo;
|
||
|
|
//
|
||
|
|
// Owner: Page Down!
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listScrollPageDn, (LPARAM) &count);
|
||
|
|
// count == number of lines open at the bottom
|
||
|
|
|
||
|
|
if ( 0 != count )
|
||
|
|
{
|
||
|
|
_cBefore += count;
|
||
|
|
if (_cBefore >= ( _cTotal - _cLines ) )
|
||
|
|
_cBefore = ( _cTotal - _cLines );
|
||
|
|
InvalidateAndUpdateScroll();
|
||
|
|
}
|
||
|
|
} //_GoDown
|
||
|
|
|
||
|
|
void CListView::PageDown ()
|
||
|
|
{
|
||
|
|
_GoDown( _cLines - 1 );
|
||
|
|
} //PageDown
|
||
|
|
|
||
|
|
void CListView::Top ()
|
||
|
|
{
|
||
|
|
long count = _cLines;
|
||
|
|
//
|
||
|
|
// Owner: Top!
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listScrollTop, (LPARAM) &count );
|
||
|
|
_cBefore = 0;
|
||
|
|
InvalidateAndUpdateScroll();
|
||
|
|
} //Top
|
||
|
|
|
||
|
|
void CListView::Bottom ()
|
||
|
|
{
|
||
|
|
long count = _cLines;
|
||
|
|
//
|
||
|
|
// Owner: Bottom!
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listScrollBottom, (LPARAM) &count);
|
||
|
|
// count == number of lines visible
|
||
|
|
_cBefore = _cTotal - count;
|
||
|
|
if (_cBefore < 0)
|
||
|
|
_cBefore = 0;
|
||
|
|
InvalidateAndUpdateScroll();
|
||
|
|
} //Bottom
|
||
|
|
|
||
|
|
void CListView::ScrollPos (int pos)
|
||
|
|
{
|
||
|
|
long iRow = pos;
|
||
|
|
//
|
||
|
|
// Owner: Scroll Position!
|
||
|
|
//
|
||
|
|
SendMessage(_hwndParent, wmListNotify, listScrollPos, (LPARAM) &iRow);
|
||
|
|
if (iRow != -1)
|
||
|
|
{
|
||
|
|
_cBefore = iRow;
|
||
|
|
InvalidateAndUpdateScroll();
|
||
|
|
}
|
||
|
|
} //ScrollPos
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Message: Reset Contents
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::ResetContents()
|
||
|
|
{
|
||
|
|
_cBefore = 0;
|
||
|
|
_cTotal = 0;
|
||
|
|
UpdateScroll();
|
||
|
|
|
||
|
|
RECT rect;
|
||
|
|
GetClientRect (_hwnd, &rect);
|
||
|
|
InvalidateRect (_hwnd, &rect, TRUE );
|
||
|
|
UpdateWindow (_hwnd);
|
||
|
|
} //ResetContents
|
||
|
|
|
||
|
|
void CListView::InvalidateAndUpdateScroll()
|
||
|
|
{
|
||
|
|
RECT rect;
|
||
|
|
GetClientRect (_hwnd, &rect);
|
||
|
|
InvalidateRect (_hwnd, &rect, TRUE );
|
||
|
|
|
||
|
|
UpdateScroll();
|
||
|
|
} //InvalidateAndUpdateScroll
|
||
|
|
|
||
|
|
//
|
||
|
|
// Message: Insert item after iRow
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::InsertItem (int iRow)
|
||
|
|
{
|
||
|
|
Win4Assert (iRow < _cLines );
|
||
|
|
RECT rect;
|
||
|
|
GetClientRect (_hwnd, &rect);
|
||
|
|
rect.top = (iRow + 1) * _cyLine;
|
||
|
|
MyScrollWindow( _hwnd, 0, _cyLine, &rect, &rect, FALSE );
|
||
|
|
_cTotal++;
|
||
|
|
UpdateWindow (_hwnd);
|
||
|
|
UpdateScroll();
|
||
|
|
} //InsertItem
|
||
|
|
|
||
|
|
//
|
||
|
|
// Message: Delete item
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::DeleteItem (int iRow)
|
||
|
|
{
|
||
|
|
Win4Assert (iRow < _cLines );
|
||
|
|
RECT rect;
|
||
|
|
|
||
|
|
GetClientRect (_hwnd, &rect);
|
||
|
|
rect.top = (iRow + 1) * _cyLine;
|
||
|
|
MyScrollWindow( _hwnd, 0, -_cyLine, &rect, &rect, FALSE );
|
||
|
|
|
||
|
|
_cTotal--;
|
||
|
|
if (_cTotal < 0)
|
||
|
|
_cTotal = 0;
|
||
|
|
|
||
|
|
// Invalidate the area which was
|
||
|
|
// scrolled up (the last row before scrolling), if visible
|
||
|
|
if ( _cTotal && _cTotal < _cLines )
|
||
|
|
{
|
||
|
|
RefreshRow( _cTotal );
|
||
|
|
}
|
||
|
|
|
||
|
|
UpdateScroll();
|
||
|
|
} //DeleteItem
|
||
|
|
|
||
|
|
//
|
||
|
|
// Message: Invalidate item
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::InvalidateItem (int iRow)
|
||
|
|
{
|
||
|
|
Win4Assert (iRow <= _cLines );
|
||
|
|
RefreshRow (iRow);
|
||
|
|
UpdateWindow (_hwnd);
|
||
|
|
} //InvalidateItem
|
||
|
|
|
||
|
|
//
|
||
|
|
// Message: Set count before
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::SetCountBefore (int cBefore)
|
||
|
|
{
|
||
|
|
_cBefore = cBefore;
|
||
|
|
SetScrollPos (_hwnd, SB_VERT, _cBefore, TRUE);
|
||
|
|
} //SetCountBefore
|
||
|
|
|
||
|
|
//
|
||
|
|
// Message: Set total count
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::SetTotalCount (int cTotal)
|
||
|
|
{
|
||
|
|
_cTotal = cTotal;
|
||
|
|
UpdateScroll ();
|
||
|
|
} //SetTotalCount
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Internal methods
|
||
|
|
//
|
||
|
|
|
||
|
|
void CListView::RefreshRow (int iRow)
|
||
|
|
{
|
||
|
|
Win4Assert ( iRow < _cLines );
|
||
|
|
RECT rect;
|
||
|
|
rect.top = iRow * _cyLine;
|
||
|
|
rect.left = 0;
|
||
|
|
rect.bottom = rect.top + _cyLine;
|
||
|
|
rect.right = _cx;
|
||
|
|
InvalidateRect (_hwnd, &rect, TRUE );
|
||
|
|
} //RefreshRow
|
||
|
|
|
||
|
|
void CListView::UpdateScroll()
|
||
|
|
{
|
||
|
|
if (_cTotal - _cLines >= 0)
|
||
|
|
{
|
||
|
|
ShowScrollBar( _hwnd, SB_VERT, TRUE );
|
||
|
|
SetScrollRange (_hwnd, SB_VERT, 0, _cTotal - 1, FALSE);
|
||
|
|
SetScrollPos (_hwnd, SB_VERT, _cBefore, TRUE);
|
||
|
|
|
||
|
|
// proportional scroll box
|
||
|
|
SCROLLINFO si;
|
||
|
|
si.cbSize = sizeof(si);
|
||
|
|
si.fMask = SIF_PAGE;
|
||
|
|
si.nPage = _cLines;
|
||
|
|
SetScrollInfo( _hwnd, SB_VERT, &si, TRUE );
|
||
|
|
|
||
|
|
EnableScrollBar (_hwnd, SB_VERT, ESB_ENABLE_BOTH );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
_cBefore = 0;
|
||
|
|
|
||
|
|
ShowScrollBar( _hwnd, SB_VERT, FALSE );
|
||
|
|
EnableScrollBar (_hwnd, SB_VERT, ESB_DISABLE_BOTH );
|
||
|
|
}
|
||
|
|
} //UpdateScroll
|
||
|
|
|
||
|
|
|