ASM Community

Hi, all

Not so familiar with Win32, I couldn't understand clearly about
PostMessage, SetScrollInfo...etc
follwing is my code.
I'd like to resize window, in WM_SIZE message.
because i want to resize window by m_ImageSize.

My problem is
1. How can I resize window by m_ImageSize(16 pixel) size, not one pixel.
2. How can I scrool window properly? this code is "SetScrollMap()"

thx,...

In C code...

        case WM_SIZE:

	width = LOWORD(lParam);

	height = HIWORD(lParam);

	width = (width + m_ImageSize) / m_ImageSize * m_ImageSize;

	height = (height + m_ImageSize) / m_ImageSize * m_ImageSize;



	PostMessage(hWnd, WM_SIZE, SIZE_RESTORED, (LPARAM)MAKELONG(width, height) );

                // I think this is wrong, but I don't know how process it.



	SetScrollMap(hWnd, LOWORD(lParam), HIWORD(lParam));

	break;



      .....



void SetScrollMap(HWND hWnd, int width, int height)

{

    HDC hdc;

    SCROLLINFO hsi;

    SCROLLINFO vsi;

    int nScrollHeight = GetSystemMetrics (SM_CXVSCROLL);

    int nScrollWidth = GetSystemMetrics (SM_CYHSCROLL); 

    int temp;



	vsi.cbSize = sizeof(vsi);

	vsi.fMask  = SIF_ALL;

	GetScrollInfo(hWnd, SB_VERT, &vsi);

	hsi.cbSize = sizeof(hsi);

	hsi.fMask  = SIF_ALL;

	GetScrollInfo(hWnd, SB_HORZ, &hsi);



	if ((int) hsi.nPage <= hsi.nMax)  {

		width += nScrollWidth; 

	}

	if ((int) vsi.nPage <= vsi.nMax){ 

		height += nScrollHeight;

	}



	temp = m_ImageSize * m_ZoomSize;

	//vsi.cbSize = sizeof(vsi); 

	vsi.fMask  = SIF_RANGE | SIF_PAGE; 

	vsi.nMin   = 0; 

	vsi.nMax   = m_MapY * m_ZoomSize - 1;

	vsi.nPage  = height / temp;

	if(height%temp) vsi.nPage--;



	SetScrollInfo(hWnd, SB_VERT, &vsi, TRUE);



	//hsi.cbSize = sizeof(hsi); 

	hsi.fMask  = SIF_RANGE | SIF_PAGE; 

	hsi.nMin   = 0;

	hsi.nMax   = m_MapX * m_ZoomSize - 1;

	hsi.nPage  = width / temp;

	if(width%temp) hsi.nPage--;



	SetScrollInfo(hWnd, SB_HORZ, &hsi, TRUE);



	if(m_hmemMapBitmap) DeleteObject(m_hmemMapBitmap);

	hdc = GetDC(hWnd);

	m_hmemMapBitmap = CreateCompatibleBitmap(hdc, width, height);

	ReleaseDC(hWnd, hdc);

}