childwnd.h File Reference

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Functions
LRESULT CALLBACK	ChildWndProc (HWND, UINT, WPARAM, LPARAM)

Function Documentation

ChildWndProc()

LRESULT CALLBACK ChildWndProc	(	HWND	hWnd,
		UINT	message,
		WPARAM	wParam,
		LPARAM	lParam
	)

PURPOSE: Processes messages for the child windows.

WM_COMMAND - process the application menu WM_DESTROY - post a quit message and return

Definition at line 373 of file childwnd.c.

{
    BOOL Result;
    RECT rc;
 
    switch (message)
    {
    case WM_CREATE:
    {
        WNDPROC oldproc;
        HFONT hFont;
        WCHAR buffer[MAX_PATH];
        DWORD style;
        IAutoComplete *pAutoComplete;
 
        /* Load "My Computer" string */
        LoadStringW(hInst, IDS_MY_COMPUTER, buffer, ARRAY_SIZE(buffer));
 
        g_pChildWnd = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(ChildWnd));
        if (!g_pChildWnd) return 0;
 
        wcsncpy(g_pChildWnd->szPath, buffer, MAX_PATH);
        g_pChildWnd->nSplitPos = 190;
        g_pChildWnd->hWnd = hWnd;
 
        /* ES_AUTOHSCROLL style enables horizontal scrolling and shrinking */
        style = WS_CHILD | WS_VISIBLE | WS_TABSTOP | ES_AUTOHSCROLL;
        g_pChildWnd->hAddressBarWnd = CreateWindowExW(WS_EX_CLIENTEDGE, L"Edit", NULL, style,
                                                      CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
                                                      hWnd, (HMENU)0, hInst, 0);
 
        style = WS_CHILD | WS_VISIBLE | WS_TABSTOP | BS_ICON | BS_CENTER |
                BS_VCENTER | BS_FLAT | BS_DEFPUSHBUTTON;
        g_pChildWnd->hAddressBtnWnd = CreateWindowExW(0, L"Button", L"\x00BB", style,
                                                      CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
                                                      hWnd, (HMENU)0, hInst, 0);
        g_pChildWnd->hArrowIcon = (HICON)LoadImageW(hInst, MAKEINTRESOURCEW(IDI_ARROW),
                                                    IMAGE_ICON, 12, 12, 0);
        SendMessageW(g_pChildWnd->hAddressBtnWnd, BM_SETIMAGE, IMAGE_ICON, (LPARAM)g_pChildWnd->hArrowIcon);
 
        if (SUCCEEDED(CoCreateInstance(&CLSID_AutoComplete, NULL, CLSCTX_INPROC_SERVER, &IID_IAutoComplete, (void**)&pAutoComplete)))
        {
            IAutoComplete_Init(pAutoComplete, g_pChildWnd->hAddressBarWnd, (IUnknown*)&g_DummyEnumStrings, NULL, NULL);
            IAutoComplete_Release(pAutoComplete);
        }
 
        GetClientRect(hWnd, &rc);
        g_pChildWnd->hTreeWnd = CreateTreeView(hWnd, g_pChildWnd->szPath, (HMENU) TREE_WINDOW);
        g_pChildWnd->hListWnd = CreateListView(hWnd, (HMENU) LIST_WINDOW, rc.right - g_pChildWnd->nSplitPos);
        SetFocus(g_pChildWnd->hTreeWnd);
 
        /* set the address bar and button font */
        if ((g_pChildWnd->hAddressBarWnd) && (g_pChildWnd->hAddressBtnWnd))
        {
            hFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
            SendMessageW(g_pChildWnd->hAddressBarWnd,
                         WM_SETFONT,
                         (WPARAM)hFont,
                         0);
            SendMessageW(g_pChildWnd->hAddressBtnWnd,
                         WM_SETFONT,
                         (WPARAM)hFont,
                         0);
        }
        /* Subclass the AddressBar */
        oldproc = (WNDPROC)GetWindowLongPtr(g_pChildWnd->hAddressBarWnd, GWLP_WNDPROC);
        SetWindowLongPtr(g_pChildWnd->hAddressBarWnd, GWLP_USERDATA, (DWORD_PTR)oldproc);
        SetWindowLongPtr(g_pChildWnd->hAddressBarWnd, GWLP_WNDPROC, (DWORD_PTR)AddressBarProc);
        break;
    }
    case WM_COMMAND:
        if(HIWORD(wParam) == BN_CLICKED)
        {
            PostMessageW(g_pChildWnd->hAddressBarWnd, WM_KEYUP, VK_RETURN, 0);
        }
        break; //goto def;
    case WM_SETCURSOR:
        if (LOWORD(lParam) == HTCLIENT)
        {
            POINT pt;
            GetCursorPos(&pt);
            ScreenToClient(hWnd, &pt);
            if (pt.x>=g_pChildWnd->nSplitPos-SPLIT_WIDTH/2 && pt.x<g_pChildWnd->nSplitPos+SPLIT_WIDTH/2+1)
            {
                SetCursor(LoadCursorW(0, IDC_SIZEWE));
                return TRUE;
            }
        }
        goto def;
 
    case WM_DESTROY:
        DestroyListView(g_pChildWnd->hListWnd);
        DestroyTreeView(g_pChildWnd->hTreeWnd);
        DestroyMainMenu();
        DestroyIcon(g_pChildWnd->hArrowIcon);
        HeapFree(GetProcessHeap(), 0, g_pChildWnd);
        g_pChildWnd = NULL;
        PostQuitMessage(0);
        break;
 
    case WM_LBUTTONDOWN:
    {
        INT x = (SHORT)LOWORD(lParam);
        if (x >= g_pChildWnd->nSplitPos - SPLIT_WIDTH / 2 &&
            x <  g_pChildWnd->nSplitPos + SPLIT_WIDTH / 2 + 1)
        {
            x = ClampSplitBarX(hWnd, x);
            draw_splitbar(hWnd, x);
            last_split = x;
            SetCapture(hWnd);
        }
        break;
    }
 
    case WM_LBUTTONUP:
    case WM_RBUTTONDOWN:
        if (GetCapture() == hWnd)
        {
            INT x = (SHORT)LOWORD(lParam);
            x = ClampSplitBarX(hWnd, x);
            finish_splitbar(hWnd, x);
        }
        break;
 
    case WM_CAPTURECHANGED:
        if (GetCapture() == hWnd && last_split >= 0)
            draw_splitbar(hWnd, last_split);
        break;
 
    case WM_KEYDOWN:
        if (wParam == VK_ESCAPE)
            if (GetCapture() == hWnd)
            {
                RECT rt;
                draw_splitbar(hWnd, last_split);
                GetClientRect(hWnd, &rt);
                ResizeWnd(rt.right, rt.bottom);
                last_split = -1;
                ReleaseCapture();
                SetCursor(LoadCursorW(0, IDC_ARROW));
            }
        break;
 
    case WM_MOUSEMOVE:
        if (GetCapture() == hWnd)
        {
            INT x = (SHORT)LOWORD(lParam);
            x = ClampSplitBarX(hWnd, x);
            if (last_split != x)
            {
                draw_splitbar(hWnd, last_split);
                last_split = x;
                draw_splitbar(hWnd, last_split);
            }
        }
        break;
 
    case WM_SETFOCUS:
        if (g_pChildWnd != NULL)
        {
            SetFocus(g_pChildWnd->nFocusPanel? g_pChildWnd->hListWnd: g_pChildWnd->hTreeWnd);
        }
        break;
 
    case WM_NOTIFY:
        if (g_pChildWnd == NULL) break;
 
        if (((LPNMHDR)lParam)->idFrom == TREE_WINDOW)
        {
            if (!TreeWndNotifyProc(g_pChildWnd->hListWnd, wParam, lParam, &Result))
            {
                goto def;
            }
 
            return Result;
        }
        else
        {
            if (((LPNMHDR)lParam)->idFrom == LIST_WINDOW)
            {
                if (!ListWndNotifyProc(g_pChildWnd->hListWnd, wParam, lParam, &Result))
                {
                    goto def;
                }
 
                return Result;
            }
            else
            {
                goto def;
            }
        }
        break;
 
    case WM_CONTEXTMENU:
    {
        POINT pt;
        if((HWND)wParam == g_pChildWnd->hListWnd)
        {
            int i, cnt;
            BOOL IsDefault;
            pt.x = (short) LOWORD(lParam);
            pt.y = (short) HIWORD(lParam);
            cnt = ListView_GetSelectedCount(g_pChildWnd->hListWnd);
            i = ListView_GetNextItem(g_pChildWnd->hListWnd, -1, LVNI_FOCUSED | LVNI_SELECTED);
            if (pt.x == -1 && pt.y == -1)
            {
                RECT rc;
                if (i != -1)
                {
                    rc.left = LVIR_BOUNDS;
                    SendMessageW(g_pChildWnd->hListWnd, LVM_GETITEMRECT, i, (LPARAM) &rc);
                    pt.x = rc.left + 8;
                    pt.y = rc.top + 8;
                }
                else
                    pt.x = pt.y = 0;
                ClientToScreen(g_pChildWnd->hListWnd, &pt);
            }
            if(i == -1)
            {
                TrackPopupMenu(GetSubMenu(hPopupMenus, PM_NEW), TPM_RIGHTBUTTON, pt.x, pt.y, 0, hFrameWnd, NULL);
            }
            else
            {
                HMENU mnu = GetSubMenu(hPopupMenus, PM_MODIFYVALUE);
                SetMenuDefaultItem(mnu, ID_EDIT_MODIFY, MF_BYCOMMAND);
                IsDefault = IsDefaultValue(g_pChildWnd->hListWnd, i);
                if(cnt == 1)
                    EnableMenuItem(mnu, ID_EDIT_RENAME, MF_BYCOMMAND | (IsDefault ? MF_DISABLED | MF_GRAYED : MF_ENABLED));
                else
                    EnableMenuItem(mnu, ID_EDIT_RENAME, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);
                EnableMenuItem(mnu, ID_EDIT_MODIFY, MF_BYCOMMAND | (cnt == 1 ? MF_ENABLED : MF_DISABLED | MF_GRAYED));
                EnableMenuItem(mnu, ID_EDIT_MODIFY_BIN, MF_BYCOMMAND | (cnt == 1 ? MF_ENABLED : MF_DISABLED | MF_GRAYED));
 
                TrackPopupMenu(mnu, TPM_RIGHTBUTTON, pt.x, pt.y, 0, hFrameWnd, NULL);
            }
        }
        else if ((HWND)wParam == g_pChildWnd->hTreeWnd)
        {
            TVHITTESTINFO hti;
            HMENU hContextMenu;
            TVITEMW item;
            MENUITEMINFOW mii;
            WCHAR resource[256];
            WCHAR buffer[256];
            LPWSTR s;
            LPCWSTR keyPath;
            HKEY hRootKey;
            int iLastPos;
            WORD wID;
            BOOL isRoot;
 
            pt.x = (short) LOWORD(lParam);
            pt.y = (short) HIWORD(lParam);
 
            if (pt.x == -1 && pt.y == -1)
            {
                RECT rc;
                hti.hItem = TreeView_GetSelection(g_pChildWnd->hTreeWnd);
                if (hti.hItem != NULL)
                {
                    TreeView_GetItemRect(g_pChildWnd->hTreeWnd, hti.hItem, &rc, TRUE);
                    pt.x = rc.left + 8;
                    pt.y = rc.top + 8;
                    ClientToScreen(g_pChildWnd->hTreeWnd, &pt);
                    hti.flags = TVHT_ONITEM;
                }
                else
                    hti.flags = 0;
            }
            else
            {
                hti.pt.x = pt.x;
                hti.pt.y = pt.y;
                ScreenToClient(g_pChildWnd->hTreeWnd, &hti.pt);
                TreeView_HitTest(g_pChildWnd->hTreeWnd, &hti);
            }
 
            if (hti.flags & TVHT_ONITEM)
            {
                TreeView_SelectItem(g_pChildWnd->hTreeWnd, hti.hItem);
 
                isRoot = (TreeView_GetParent(g_pChildWnd->hTreeWnd, hti.hItem) == NULL);
                hContextMenu = GetSubMenu(hPopupMenus, isRoot ?  PM_ROOTITEM : PM_TREECONTEXT);
 
                memset(&item, 0, sizeof(item));
                item.mask = TVIF_STATE | TVIF_CHILDREN;
                item.hItem = hti.hItem;
                TreeView_GetItem(g_pChildWnd->hTreeWnd, &item);
 
                /* Set the Expand/Collapse menu item appropriately */
                LoadStringW(hInst, (item.state & TVIS_EXPANDED) ? IDS_COLLAPSE : IDS_EXPAND, buffer, ARRAY_SIZE(buffer));
                memset(&mii, 0, sizeof(mii));
                mii.cbSize = sizeof(mii);
                mii.fMask = MIIM_STRING | MIIM_STATE | MIIM_ID;
                mii.fState = (item.cChildren > 0) ? MFS_DEFAULT : MFS_GRAYED;
                mii.wID = (item.state & TVIS_EXPANDED) ? ID_TREE_COLLAPSEBRANCH : ID_TREE_EXPANDBRANCH;
                mii.dwTypeData = (LPWSTR) buffer;
                SetMenuItemInfo(hContextMenu, 0, TRUE, &mii);
 
                if (isRoot == FALSE)
                {
                    /* Remove any existing suggestions */
                    memset(&mii, 0, sizeof(mii));
                    mii.cbSize = sizeof(mii);
                    mii.fMask = MIIM_ID;
                    GetMenuItemInfo(hContextMenu, GetMenuItemCount(hContextMenu) - 1, TRUE, &mii);
                    if ((mii.wID >= ID_TREE_SUGGESTION_MIN) && (mii.wID <= ID_TREE_SUGGESTION_MAX))
                    {
                        do
                        {
                            iLastPos = GetMenuItemCount(hContextMenu) - 1;
                            GetMenuItemInfo(hContextMenu, iLastPos, TRUE, &mii);
                            RemoveMenu(hContextMenu, iLastPos, MF_BYPOSITION);
                        }
                        while((mii.wID >= ID_TREE_SUGGESTION_MIN) && (mii.wID <= ID_TREE_SUGGESTION_MAX));
                    }
 
                    /* Come up with suggestions */
                    keyPath = GetItemPath(g_pChildWnd->hTreeWnd, NULL, &hRootKey);
                    SuggestKeys(hRootKey, keyPath, Suggestions, ARRAY_SIZE(Suggestions));
                    if (Suggestions[0])
                    {
                        AppendMenu(hContextMenu, MF_SEPARATOR, 0, NULL);
 
                        LoadStringW(hInst, IDS_GOTO_SUGGESTED_KEY, resource, ARRAY_SIZE(resource));
 
                        s = Suggestions;
                        wID = ID_TREE_SUGGESTION_MIN;
                        while(*s && (wID <= ID_TREE_SUGGESTION_MAX))
                        {
                            WCHAR *path = s, buf[MAX_PATH];
                            if (hRootKey == HKEY_CURRENT_USER || hRootKey == HKEY_LOCAL_MACHINE)
                            {
                                // Windows 10 only displays the root name
                                LPCWSTR next = PathFindNextComponentW(s);
                                if (next > s)
                                    lstrcpynW(path = buf, s, min(next - s, _countof(buf)));
                            }
                            _snwprintf(buffer, ARRAY_SIZE(buffer), resource, path);
 
                            memset(&mii, 0, sizeof(mii));
                            mii.cbSize = sizeof(mii);
                            mii.fMask = MIIM_STRING | MIIM_ID;
                            mii.wID = wID++;
                            mii.dwTypeData = buffer;
                            InsertMenuItem(hContextMenu, GetMenuItemCount(hContextMenu), TRUE, &mii);
 
                            s += wcslen(s) + 1;
                        }
                    }
                }
                TrackPopupMenu(hContextMenu, TPM_RIGHTBUTTON, pt.x, pt.y, 0, hFrameWnd, NULL);
            }
        }
        break;
    }
 
    case WM_SIZE:
        if (wParam != SIZE_MINIMIZED && g_pChildWnd != NULL)
        {
            ResizeWnd(LOWORD(lParam), HIWORD(lParam));
        }
        break;
 
    default:
def:
        return DefWindowProcW(hWnd, message, wParam, lParam);
    }
    return 0;
}

Referenced by InitInstance().