Sir,
Thanks for the response. Let me put the work I tried till now so that you
can easily find my error.
I know that whenever we resize or minize , maximize etc , windows will
invalidate the region and will cseng WM_PAINT mesage. I have written a code and
I habdled WM_SIZE message . I called Invalidate() in that handler (somtime back
, i heard like invalidaterect() will store the current content of screen in
some buffer and will be used by OnPaint() to repaint) . Up my screen completly
washed whener I resized. I used BitBlt ( I created a compatibleDC and stored
the current content of screen into that DC using BitBlt) . Then in WM_PAINT , I
tried to restore the compatibleDC content with current screen content using
BitBltagain. But didn't work.. Can anyone help me out ..
My code is..
.386
.model flat,stdcall
option casemap:none
include ..\masm32\include\windows.inc
include ..\masm32\include\user32.inc
includelib ..\masm32\lib\user32.lib ; calls to functions in
user32.lib and kernel32.lib
include ..\masm32\include\kernel32.inc
includelib ..\masm32\lib\kernel32.lib
include ..\masm32\include\gdi32.inc
includelib ..\masm32\lib\gdi32.lib
WinMain proto :DWORD,:DWORD,:DWORD,:DWORD
.DATA ; initialized data
ClassName db "SimpleWinClass",0 ; the name of our window class
AppName db "Our First Window",0 ; the name of our window
OurText db "GopiKrishnaKomanduri!",0
FontName db "script",0
regionupdate dword "true" ,0
stri dword "Gopi",0
verify dword "a",0
.const
IDC_EDIT equ 3000
.DATA? ; Uninitialized data
hInstance HINSTANCE ? ; Instance handle of our program
CommandLine LPSTR ?
xvalue dword ?
yvalue dword ?
xtemp dword ?
ytemp dword ?
compatibledc HDC ?
memorydc HDC ?
.CODE ; Here begins our code
start:
invoke GetModuleHandle, NULL ; get the instance handle of our
program.
; Under
Win32, hmodule==hinstance mov hInstance,eax
mov hInstance,eax
invoke GetCommandLine ; get the command line. You don't
have to call this function IF
; your
program doesn't process the command line.
mov CommandLine,eax
invoke WinMain, hInstance,NULL,CommandLine, SW_SHOWDEFAULT ; call the
main function
invoke ExitProcess, eax ; quit our program. The exit
code is returned in eax from WinMain.
WinMain proc hInst:HINSTANCE,hPrevInst:HINSTANCE,CmdLine:LPSTR,CmdShow:DWORD
LOCAL wc:WNDCLASSEX ; create
local variables on stack
LOCAL msg:MSG
LOCAL hwnd:HWND
mov wc.cbSize,SIZEOF WNDCLASSEX ; fill values in
members of wc
mov wc.style, CS_HREDRAW or CS_VREDRAW
mov wc.lpfnWndProc, OFFSET WndProc
mov wc.cbClsExtra,NULL
mov wc.cbWndExtra,NULL
push hInstance
pop wc.hInstance
mov wc.hbrBackground,COLOR_WINDOW+10
mov wc.lpszMenuName,NULL
mov wc.lpszClassName,OFFSET ClassName
invoke LoadIcon,NULL,IDI_APPLICATION
mov wc.hIcon,eax
mov wc.hIconSm,eax
invoke LoadCursor,NULL,IDC_ARROW
mov wc.hCursor,eax
invoke RegisterClassEx, addr wc ; register our window
class
invoke CreateWindowEx,NULL,\
ADDR ClassName,\
ADDR AppName,\
WS_OVERLAPPEDWINDOW,\
CW_USEDEFAULT,\
CW_USEDEFAULT,\
CW_USEDEFAULT,\
CW_USEDEFAULT,\
NULL,\
NULL,\
hInst,\
NULL
mov hwnd,eax
invoke ShowWindow, hwnd,CmdShow ; display our window on
desktop
invoke UpdateWindow, hwnd ; refresh the
client area
.WHILE TRUE ;
Enter message loop
invoke GetMessage, ADDR msg,NULL,0,0
.BREAK .IF (!eax)
invoke TranslateMessage, ADDR msg
invoke DispatchMessage, ADDR msg
.ENDW
mov eax,msg.wParam ; return
exit code in eax
ret
WinMain endp
WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
LOCAL hdc:HDC
LOCAL ps:PAINTSTRUCT
LOCAL rect:RECT
LOCAL brRed:HBRUSH
LOCAL pt:POINT
LOCAL hfont:HFONT
RGB macro red,green,blue
xor eax,eax
mov ah,blue
shl eax,8
mov ah,green
mov al,red
endm
.IF uMsg==WM_DESTROY ; if the user closes our
window
invoke PostQuitMessage,NULL
.ELSEIF uMsg==WM_LBUTTONDOWN
; invoke MessageBox,NULL,NULL,NULL,NULL
invoke GetDC,hWnd
mov hdc,eax
invoke GetCursorPos,ADDR pt
mov eax,pt.x
ADD eax,100
mov xvalue,eax
mov eax,pt.x
mov xtemp,eax
SUB xtemp,48
mov eax,pt.y
ADD eax,100
mov yvalue,eax
mov ytemp,eax
SUB ytemp,48
; invoke MessageBox,NULL,ADDR xtemp,NULL,NULL
invoke TextOut,hdc,pt.x,pt.y,ADDR stri,5
; invoke Rectangle,hdc,pt.x,pt.y,xvalue,yvalue
invoke ReleaseDC,hWnd,hdc
.ELSEIF uMsg==WM_PAINT
invoke BeginPaint,hWnd, ADDR ps
mov memorydc,eax
invoke BitBlt,memorydc,0,0,1000,1000,compatibledc,0, 0, SRCCOPY
invoke MessageBox,NULL,ADDR verify,NULL,NULL
;BitBlt(dc.m_hDC,0,0,windowSize.right,windowSize.bo
;ttom,memoryDC,0,0,SRCCOPY);
;invoke InvalidateRect,hWnd,NULL,TRUE
;invoke UpdateWindow,hWnd
.ELSEIF uMsg==WM_SIZE
; invoke MessageBox,NULL,NULL,NULL,NULL
invoke CreateCompatibleDC,hWnd
mov compatibledc,eax
mov eax , "gopi"
mov verify,"Gopi"
invoke InvalidateRect,hWnd,NULL,TRUE
;invoke UpdateWindow,hWnd
;invoke SendMessage,hWnd,WM_PAINT,0,0
.ELSE
invoke DefWindowProc,hWnd,uMsg,wParam,lParam ; Default message
processing
ret
.ENDIF
xor eax,eax
ret
WndProc endp
end start
Tamas Marki <[EMAIL PROTECTED]> wrote:
On 5/23/07, Gopi Krishna Komanduri <[EMAIL PROTECTED]> wrote:
> Hi All ,
> It is with respect to windows programming . sorry for posting wrongly . But I
> strongly believe there will be atlest 1% windows programmers and don't want
> to leave that chance.
>
> I have a small query from long time like , if I painted some thing on client
> area and then when I resized , the those won't be there.. How to repaint all
> that stuff? I know one thing is like when we call begin paint (), it will
> take care.. But if I don't want to call that function (if I want to call that
> function , I need to call in WM_SIZE command I think , am I correct ?) how to
> achieve? I think one way is to call every pixel RGB value and store some
> where and again call to refill but I couldn't implement
it..
Your window will receive a WM_PAINT message when it needs to be
redrawn, and you need to do the painting in that handler.
--
Tamas Marki
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