hello, all
1. question
after it's gone sometimes, the background of superclass edit is being changed from black to white.
EditWndProc PROC hEdit:DWORD,uMsg:DWORD,wParam:DWORD,lParam:DWORD
local ps:PAINTSTRUCT
local rt:RECT
LOCAL buffer[32]:byte
LOCAL mdc:DWORD
LOCAL hdc:HDC
LOCAL hBmp:DWORD
mov eax,uMsg
.if eax==WM_PAINT
invoke BeginPaint,hEdit,addr ps
mov hdc,eax
invoke CreateCompatibleDC,eax
mov mdc,eax
invoke GetClientRect,hEdit,addr rt
invoke CreateCompatibleBitmap,ps.hdc,rt.right,rt.bottom
mov hBmp,eax
invoke SelectObject,mdc,eax
invoke CreateSolidBrush,0h
invoke FillRect,mdc,addr rt,eax
invoke SelectObject,mdc,hFont
invoke SetBkMode,mdc,TRANSPARENT
invoke SetTextColor,mdc,Red
invoke RtlZeroMemory,addr buffer,sizeof buffer
invoke GetWindowText,hEdit,addr buffer,32
invoke lstrlen,addr buffer
mov ebx,eax
invoke DrawText,mdc,addr buffer,ebx,addr rt,DT_VCENTER or DT_SINGLELINE or DT_CENTER
invoke BitBlt,hdc,0,0,rt.right,rt.bottom,mdc,0,0,SRCCOPY
invoke DeleteDC,mdc
invoke DeleteObject,hBmp
invoke EndPaint,hEdit,addr ps
.else
invoke CallWindowProc,OldWndProc,hEdit,uMsg,wParam,lParam
ret
.endif
xor eax,eax
ret
EditWndProc endp
;---------------------------------------------------------------------
cEditText proc hParent:DWORD, x:DWORD,y:DWORD,w:DWORD,h:DWORD,ID:DWORD
LOCAL @wc:WNDCLASSEX
mov @wc.cbSize,sizeof WNDCLASSEX
invoke GetClassInfoEx,NULL,SADD("EDIT"),addr @wc
m2m OldWndProc,@wc.lpfnWndProc
mov @wc.lpfnWndProc, OFFSET EditWndProc
m2m @wc.hInstance,hInstance
mov @wc.lpszClassName,SADD("SUPEREDITCLASS")
invoke RegisterClassEx, addr @wc
invoke CreateWindowEx,WS_EX_CLIENTEDGE,S("SUPEREDITCLASS"),NULL,\
WS_CHILD+WS_VISIBLE+WS_BORDER,x,y,w,h,\
hParent,ID,hInstance,NULL
ret
cEditText endp
;---------------------------------------------------------------------
; one second to do the following
...
invoke SetDlgItemText, hWnd, ID_EDIT,addr dataBuffer
...
2. question
if the mouse does not moving, the cursor can be changed.
...
;---------------------------------------------------------------------
invoke LoadCursor, hInstance, ID_CURSOR1
invoke SetClassLong, hWin, GCL_HCURSOR, eax
invoke UpdateWindow, hWin
;---------------------------------------------------------------------...
Everything looks alright with the code, my only comment is that with DrawText you do not need to get the string length as the returned string from GetWindowText is NULL terminated...
mov BYTE PTR buffer, 0
invoke GetWindowText,hEdit,addr buffer,32
invoke DrawText,mdc,addr buffer,-1,addr rt,DT_VCENTER or DT_SINGLELINE or DT_CENTER
If you use -1 as the string length for DrawText it assumes a NULL terminated string, note that the documentation at MSDN is wrong for this function. Also there is no need to set the entire buffer to 0 with RtlZeroMemory, only the first byte as GetWindowText does not modify the buffer in cases where there is an error. Generally I like to keep WM_PAINT subclassing pretty lean and mean so I cut out all extra API calls within it.
Hello,donkey
thanks your response.
the problem is still there.
mov BYTE PTR buffer, 0
invoke GetWindowText,hEdit,addr buffer,32
invoke DrawText,mdc,addr buffer,-1,addr rt,DT_VCENTER or DT_SINGLELINE or DT_CENTER