mirror of
https://github.com/reactos/reactos.git
synced 2024-08-30 15:18:33 +00:00
99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/*
|
|
* PROJECT: ReactOS Task Manager
|
|
* LICENSE: LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
|
|
* PURPOSE: Processes List.
|
|
* COPYRIGHT: Copyright 1999-2001 Brian Palmer <brianp@reactos.org>
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
|
|
INT_PTR CALLBACK ProcessListWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
|
|
|
|
WNDPROC OldProcessListWndProc;
|
|
|
|
|
|
INT_PTR CALLBACK
|
|
ProcessListWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
HBRUSH hbrBackground;
|
|
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 it's state
|
|
* to be restored after we're done
|
|
*/
|
|
hDC = (HDC) wParam;
|
|
DcSave = SaveDC(hDC);
|
|
|
|
/*
|
|
* Get the background brush
|
|
*/
|
|
hbrBackground = (HBRUSH)(LONG_PTR) GetClassLongPtrW(hWnd, GCL_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;
|
|
SendMessageW(hWnd, LVM_GETITEMRECT, ListView_GetItemCount(hWnd) - 1, (LPARAM)&rcItem);
|
|
rcClip.bottom = rcItem.bottom;
|
|
rcClip.right = rcItem.right;
|
|
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);
|
|
}
|