reactos/rosapps/regedit/regtree.cpp

/*
 *  ReactOS regedit
 *
 *  regtree.cpp
 *
 *  Copyright (C) 2002  Robert Dickenson <robd@reactos.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef _MSC_VER
#include "stdafx.h"
#else
#define WIN32_LEAN_AND_MEAN     // Exclude rarely-used stuff from Windows headers
#include <windows.h>
#include <commctrl.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>
#include <process.h>
#include <stdio.h>
#endif
    
#include "regedit.h"
#include "regtree.h"

// Global Variables:
extern HINSTANCE hInst;                   // current instance
extern HWND hMainWnd;                     // Main Window

// Global variables and constants 
// Image_Open, Image_Closed, and Image_Root - integer variables for 
// indexes of the images. 
// CX_BITMAP and CY_BITMAP - width and height of an icon. 
// NUM_BITMAPS - number of bitmaps to add to the image list. 
int Image_Open; 
int Image_Closed; 
int Image_Root; 

#define CX_BITMAP    16
#define CY_BITMAP    16
#define NUM_BITMAPS  3


// AddItemToTree - adds items to a tree view control. 
// Returns the handle to the newly added item. 
// hwndTV - handle to the tree view control. 
// lpszItem - text of the item to add. 
// nLevel - level at which to add the item. 

HTREEITEM AddItemToTree(HWND hwndTV, LPSTR lpszItem, int nLevel)
{ 
    TVITEM tvi; 
    TVINSERTSTRUCT tvins; 
    static HTREEITEM hPrev = (HTREEITEM)TVI_FIRST; 
    static HTREEITEM hPrevRootItem = NULL; 
    static HTREEITEM hPrevLev2Item = NULL; 
    HTREEITEM hti; 
 
    tvi.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_PARAM; 
 
    // Set the text of the item. 
    tvi.pszText = lpszItem; 
    tvi.cchTextMax = lstrlen(lpszItem); 
 
    // Assume the item is not a parent item, so give it an image. 
    tvi.iImage = Image_Root; 
    tvi.iSelectedImage = Image_Root; 

    tvi.cChildren = 1; 

 
    // Save the heading level in the item's application-defined data area. 
    tvi.lParam = (LPARAM)nLevel; 
 
    tvins.item = tvi; 
    tvins.hInsertAfter = hPrev; 
 
    // Set the parent item based on the specified level. 
    if (nLevel == 1) 
        tvins.hParent = TVI_ROOT; 
    else if (nLevel == 2) 
        tvins.hParent = hPrevRootItem; 
    else 
        tvins.hParent = hPrevLev2Item; 
 
    // Add the item to the tree view control. 
    hPrev = (HTREEITEM)SendMessage(hwndTV, TVM_INSERTITEM, 0, (LPARAM)(LPTVINSERTSTRUCT)&tvins); 
 
    // Save the handle to the item. 
    if (nLevel == 1) 
        hPrevRootItem = hPrev; 
    else if (nLevel == 2) 
        hPrevLev2Item = hPrev; 
 
    // The new item is a child item. Give the parent item a 
    // closed folder bitmap to indicate it now has child items. 
    if (nLevel > 1) { 
        hti = TreeView_GetParent(hwndTV, hPrev); 
        tvi.mask = TVIF_IMAGE | TVIF_SELECTEDIMAGE; 
        tvi.hItem = hti; 
        tvi.iImage = Image_Closed; 
        tvi.iSelectedImage = Image_Closed; 
        TreeView_SetItem(hwndTV, &tvi); 
    } 
 
    return hPrev; 
} 

// InitTreeViewItems - extracts headings from the specified file and 
// passes them to a function that adds them to a tree view control. 
// Returns TRUE if successful, or FALSE otherwise. 
// hwndTV - handle to the tree view control. 
// lpszFileName - name of file with headings.

BOOL InitTreeViewItems(HWND hwndTV, LPSTR lpszFileName) 
{ 
    HTREEITEM hItem;
    
    hItem = AddItemToTree(hwndTV, "My Computer", 1); 
    AddItemToTree(hwndTV, "HKEY_CLASSES_ROOT", 2); 
    AddItemToTree(hwndTV, "HKEY_CURRENT_USER", 2); 
    AddItemToTree(hwndTV, "HKEY_LOCAL_MACHINE", 2); 
    AddItemToTree(hwndTV, "HKEY_USERS", 2); 
    AddItemToTree(hwndTV, "HKEY_CURRENT_CONFIG", 2); 

    TreeView_Expand(hwndTV, hItem, TVE_EXPAND);
    return TRUE; 
} 
 
// InitTreeViewImageLists - creates an image list, adds three bitmaps 
// to it, and associates the image list with a tree view control. 
// Returns TRUE if successful, or FALSE otherwise. 
// hwndTV - handle to the tree view control. 

BOOL InitTreeViewImageLists(HWND hwndTV) 
{ 
    HIMAGELIST himl;  // handle to image list 
    HBITMAP hbmp;     // handle to bitmap 

    // Create the image list. 
    if ((himl = ImageList_Create(CX_BITMAP, CY_BITMAP, 
        FALSE, NUM_BITMAPS, 0)) == NULL) 
        return FALSE; 

    // Add the open file, closed file, and document bitmaps. 
    hbmp = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_OPEN_FILE)); 
    Image_Open = ImageList_Add(himl, hbmp, (HBITMAP) NULL); 
    DeleteObject(hbmp); 

    hbmp = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_CLOSED_FILE)); 
    Image_Closed = ImageList_Add(himl, hbmp, (HBITMAP) NULL); 
    DeleteObject(hbmp); 

    hbmp = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_ROOT)); 
    Image_Root = ImageList_Add(himl, hbmp, (HBITMAP) NULL); 
    DeleteObject(hbmp); 

    // Fail if not all of the images were added. 
    if (ImageList_GetImageCount(himl) < 3) 
        return FALSE; 

    // Associate the image list with the tree view control. 
    TreeView_SetImageList(hwndTV, himl, TVSIL_NORMAL); 

    return TRUE; 
} 

// CreateTreeView - creates a tree view control. 
// Returns the handle to the new control if successful,
// or NULL otherwise. 
// hwndParent - handle to the control's parent window. 
// lpszFileName - name of the file to parse for tree view items.

HWND CreateTreeView(HWND hwndParent, LPSTR lpszFileName) 
{ 
    RECT rcClient;  // dimensions of client area 
    HWND hwndTV;    // handle to tree view control 
 
    // Get the dimensions of the parent window's client area, and create 
    // the tree view control. 
    GetClientRect(hwndParent, &rcClient); 
    hwndTV = CreateWindowEx(0, WC_TREEVIEW, "Tree View", 
        WS_VISIBLE | WS_CHILD | WS_BORDER | TVS_HASLINES | TVS_HASBUTTONS | TVS_LINESATROOT,
        0, 0, rcClient.right, rcClient.bottom, 
        hwndParent, (HMENU)TREE_WINDOW, hInst, NULL); 
 
    // Initialize the image list, and add items to the control. 
    if (!InitTreeViewImageLists(hwndTV) || !InitTreeViewItems(hwndTV, lpszFileName)) { 
        DestroyWindow(hwndTV); 
        return FALSE; 
    } 
    return hwndTV;
}