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