List-box does not fills correctly window space in on my own coded class "splitter"

[duga]

I have implemented window class (so called "splitter") and have a problem. It means - this class works fine for text-edits, buttons, normal (usual windows) - all I have tested except form list-box. List-box docks badly - it does not fills all space which it is supposed to do. Some place is not filled correctly what makes for my class troubles. How can I it solve?

#include "SplitterWindow.h"
#include "stdafx.h"
#include <wchar.h>

bool InitializeSplitter(HINSTANCE hInstance);
HWND CreateSplitterWindow(HINSTANCE hInstance, HWND hwnd1, HWND hwnd2, wchar_t title[0x100],
	HBRUSH brush, BOOL horizontal);
LRESULT CALLBACK SplitterWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

typedef struct _SplitterInfo
{
	HWND hWnd1;
	HWND hWnd2;
	HCURSOR hCursor;
	BOOL	bSplitterMoving;
	DWORD dwSplitterPos;
	BOOL horizontal;
	HBRUSH brush; // debug purposes
	wchar_t title[0x100]; // debug purposes
} SplitterInfo;

bool InitializeSplitter(HINSTANCE hInstance)
{
	WNDCLASS	wndclass;

	wndclass.style		= 0; //CS_HREDRAW | CS_VREDRAW;
	wndclass.lpfnWndProc	= SplitterWndProc;
	wndclass.cbClsExtra	= 0;
	wndclass.cbWndExtra	= 0;
	wndclass.hInstance	= hInstance;
	wndclass.hIcon		= LoadIcon(NULL, IDI_INFORMATION);
	wndclass.hCursor	= LoadCursor(NULL, IDC_ARROW);
	wndclass.hbrBackground	= (HBRUSH)GetStockObject(LTGRAY_BRUSH);
	wndclass.lpszMenuName	= NULL;
	wndclass.lpszClassName	= L"SPLITTER";
	if (RegisterClass(&wndclass))
		return true;
	else
		return false;
}

HWND CreateSplitterWindow(HINSTANCE hInstance, HWND hwnd1, HWND hwnd2, wchar_t title[0x100],
	HBRUSH brush, BOOL horizontal)
{
	HWND hwnd = CreateWindowEx(0, L"SPLITTER", L"Splitter",  
		WS_POPUP | WS_CLIPCHILDREN, 
				CW_USEDEFAULT, CW_USEDEFAULT, 
				400, 300, 
				NULL, NULL,
				hInstance, NULL);
	if (hwnd == NULL)
		return NULL;
	
	SetParent(hwnd1, hwnd);
	SetParent(hwnd2, hwnd);

	SplitterInfo *info = (SplitterInfo *)GlobalAlloc(GPTR, sizeof(SplitterInfo));
	info->hWnd1 = hwnd1;
	info->hWnd2 = hwnd2;
	info->brush = brush;
	wcscpy(info->title, title);
	if (horizontal)
		info->hCursor = LoadCursor(NULL, IDC_SIZENS);
	else
		info->hCursor = LoadCursor(NULL, IDC_SIZEWE);

	info->bSplitterMoving = FALSE;
	info->dwSplitterPos = 300;
	info->horizontal = horizontal;

	ShowWindow(hwnd1, TRUE);
	ShowWindow(hwnd2, TRUE);
	UpdateWindow(hwnd1);
	UpdateWindow(hwnd2);

	SetWindowLong(hwnd, GWL_USERDATA, (LONG)info);
	return hwnd;

}

LRESULT CALLBACK SplitterWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	HINSTANCE	hInst;
	RECT		rect;

	SplitterInfo *info = (SplitterInfo *)GetWindowLong(hWnd, GWL_USERDATA);

	switch (uMsg)
	{
	case WM_PAINT:
		{
			if (info==NULL)
				break;
			PAINTSTRUCT ps;
			RECT rect;
			GetClientRect(hWnd, &rect);
			HDC hdc = BeginPaint(hWnd, &ps);
			FillRect(hdc, &rect, info->brush);
			EndPaint(hWnd, &ps);
		}
		break;
	case WM_CLOSE:

		return 0;
	case WM_SIZE:
		if (info == NULL)
			break;

		if (info->horizontal)
		{
		/* 
		   If window is shrunk so that splitter now lies outside the 
		   window boundaries, move the splitter within the window.
		*/
		
		if ((wParam != SIZE_MINIMIZED) && (HIWORD(lParam) < info->dwSplitterPos))
			info->dwSplitterPos = HIWORD(lParam) - 10;
		

		/* Adjust the children's size and position */
		
		MoveWindow(info->hWnd1, 0, 0, LOWORD(lParam), info->dwSplitterPos - 1, TRUE);
		MoveWindow(info->hWnd2, 0, info->dwSplitterPos+2, LOWORD(lParam) , HIWORD(lParam) - info->dwSplitterPos - 2, TRUE);
		
		}
		else
		{

			if ((wParam != SIZE_MINIMIZED) && (LOWORD(lParam) < info->dwSplitterPos))
				info->dwSplitterPos = LOWORD(lParam) - 10;

			MoveWindow(info->hWnd1, 0, 0, info->dwSplitterPos - 1, HIWORD(lParam), TRUE);
			MoveWindow(info->hWnd2, info->dwSplitterPos+2, 0, LOWORD(lParam) - info->dwSplitterPos - 2, HIWORD(lParam) , TRUE);
		}
		return 0;


	case WM_MOUSEMOVE:
		if (info == NULL)
			break;
		if (info->horizontal)
		{
			if (HIWORD(lParam) > 10) // do not allow above this mark
			{
				SetCursor(info->hCursor);
				if ((wParam == MK_LBUTTON) && info->bSplitterMoving)
				{
					GetClientRect(hWnd, &rect);
					if (HIWORD(lParam) > rect.bottom)
						return 0;

					info->dwSplitterPos = HIWORD(lParam);
					SendMessage(hWnd, WM_SIZE, 0, MAKELPARAM(rect.right, rect.bottom));
				}
			}
		}
		else
		{
			if (LOWORD(lParam) > 10) // do not allow above this mark
			{
				SetCursor(info->hCursor);
				if ((wParam == MK_LBUTTON) && info->bSplitterMoving)
				{
					GetClientRect(hWnd, &rect);
					if (LOWORD(lParam) > rect.right)
						return 0;

					info->dwSplitterPos = LOWORD(lParam);
					SendMessage(hWnd, WM_SIZE, 0, MAKELPARAM(rect.right, rect.bottom));
				}
			}
		}
		return 0;
		/*
	case WM_NCHITTEST:
		{
			wchar_t string[0x100];
			swprintf(string, 0x100, L"(%d,%d)", LOWORD(lParam), HIWORD(lParam));
			MessageBox(hWnd, string, L"NCHITTEST", MB_ICONINFORMATION | MB_OK);
		}
		break;
		*/
	case WM_LBUTTONDOWN:
		if (info == NULL)
			break;
		SetCursor(info->hCursor);
		info->bSplitterMoving = TRUE;
		SetCapture(hWnd);
		return 0;


	case WM_LBUTTONUP:
		if (info == NULL)
			break;
		ReleaseCapture();
		info->bSplitterMoving = FALSE;
		return 0;


	case WM_DESTROY:
		
		if (info != NULL)
		{
			info->hCursor = NULL;
			DestroyWindow(info->hWnd1);
			DestroyWindow(info->hWnd2);
			GlobalFree(info);
			SetWindowLong(hWnd, GWL_USERDATA, NULL);
		}

		return 0;

	}
	return DefWindowProc(hWnd, uMsg, wParam, lParam);
}

[ReneK]

Just create your ListBox with the LBS_NOINTEGRALHEIGHT style set.

[duga]

thanks, it works