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/*
* ReactOS Task Manager
*
* proclist.c
*
* Copyright (C) 1999 - 2001 Brian Palmer <brianp@reactos.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <commctrl.h>
#include <winnt.h>
#include "taskmgr.h"
#include "perfdata.h"
WNDPROC OldProcessListWndProc;
LRESULT CALLBACK ProcessListWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HBRUSH hbrBackground;
int count;
RECT rcItem;
RECT rcClip;
HDC hDC;
int DcSave;
switch (message)
{
case WM_ERASEBKGND:
/*
* The list control produces a nasty flicker
* when the user is resizing the window because
* it erases the background to white, then
* paints the list items over it.
*
* We will clip the drawing so that it only
* erases the parts of the list control that
* show only the background.
*/
/*
* Get the device context and save its state
* to be restored after we're done
*/
hDC = (HDC) wParam;
DcSave = SaveDC(hDC);
/*
* Get the background brush
*/
hbrBackground = (HBRUSH) GetClassLongPtrW(hWnd, GCLP_HBRBACKGROUND);
/*
* Calculate the clip rect by getting the RECT
* of the first and last items and adding them up.
*
* We also have to get the item's icon RECT and
* subtract it from our clip rect because we don't
* use icons in this list control.
*/
rcClip.left = LVIR_BOUNDS;
SendMessageW(hWnd, LVM_GETITEMRECT, 0, (LPARAM) &rcClip);
rcItem.left = LVIR_BOUNDS;
count = SendMessageW(hWnd, LVM_GETITEMCOUNT, 0, 0);
SendMessageW(hWnd, LVM_GETITEMRECT, count - 1, (LPARAM) &rcItem);
rcClip.bottom = rcItem.bottom;
rcItem.left = LVIR_ICON;
SendMessageW(hWnd, LVM_GETITEMRECT, 0, (LPARAM) &rcItem);
rcClip.left = rcItem.right;
/*
* Now exclude the clip rect
*/
ExcludeClipRect(hDC, rcClip.left, rcClip.top, rcClip.right, rcClip.bottom);
/*
* Now erase the background
*
*
* FIXME: Should I erase it myself or
* pass down the updated HDC and let
* the default handler do it?
*/
GetClientRect(hWnd, &rcItem);
FillRect(hDC, &rcItem, hbrBackground);
/*
* Now restore the DC state that we
* saved earlier
*/
RestoreDC(hDC, DcSave);
return TRUE;
}
/*
* We pass on all messages except WM_ERASEBKGND
*/
return CallWindowProcW(OldProcessListWndProc, hWnd, message, wParam, lParam);
}
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