Adding text where cursor is?

This is a discussion on Adding text where cursor is? within the Windows Programming forums, part of the Platform Specific Boards category; I am working on a simple HTML editor with a styles wizard. I know how to generate the text but ...

  1. #1
    Registered User
    Join Date
    Apr 2002
    Posts
    7

    Adding text where cursor is?

    I am working on a simple HTML editor with a styles wizard. I know how to generate the text but I can only figure out how to add the text to the end. I want to insert it wherever the cursor is but dont know how. This is what I have so far:

    Code:
    case IDOK:{
    int len = GetWindowTextLength(GetDlgItem(hWnd, IN_HOVERCOLOR));
    char* ret_color;
    ret_color = (char*)GlobalAlloc(GPTR, len + 1);
    
    GetDlgItemText(hWnd, IN_HOVERCOLOR, ret_color, 16);
    //ret_color now has value of IN_HOVERCOLOR//
    
    HWND hwndpar;
    hwndpar = GetWindow(hWnd,GW_OWNER);
    HWND hEdit;
    hEdit = GetDlgItem(hwndpar, MAIN_EDIT);
    
    char* before_text;
    int txtlen = GetWindowTextLength(hEdit);
    before_text = (char*)GlobalAlloc(GPTR, txtlen + 75);
    GetWindowText(hEdit, before_text, txtlen+1);
    char style_text[75];
    strcpy(style_text,"<style>\r\n<!--\r\na:hover{color:");
    strcat(style_text,ret_color);
    strcat(style_text,";}\r\n-->\r\n</style>"); //22 len
    //Style Text now has the style tag//
    strcat(before_text, style_text);
    SetWindowText(hEdit, before_text);
    //Free up memory//
    GlobalFree(before_text);
    EndDialog(hWnd, wCommand);
    
    }
    break;

  2. #2
    train spotter
    Join Date
    Aug 2001
    Location
    near a computer
    Posts
    3,854
    Most times the cursor will be at the end of the text. Could look at the WM_COMMAND messages for the edit.

    use
    case ID_EDIT:
    if (EN_CHANGE == HIWORD(wParam)) //user is typing text so cursor is at end

    or play with SendMessage() and EM_GETSEL (could work?)

    I think you are going to have some size errors here if length ret_color is about 30 or more. Alloc some more mem here

    Code:
    strcpy(style_text,"<style>\r\n<!--\r\na:hover{color:");
    strcat(style_text,ret_color);
    strcat(style_text,";}\r\n-->\r\n</style>"); //22 len
    better would be
    Code:
    char *before_text, *edit_Text;
    int     iLen=0;
    
    iLen=  lstrlen( "<style>\r\n<!--\r\na:hover{color:" ) 
           + lstrlen( ";}\r\n-->\r\n</style>" ) 
           + lstrlen(ret_color) 
           + GetWindowTextLength( hEdit );
    //you should always error test the mem allocs
    edit_Text     = (char*)GlobalAlloc(GPTR, GetWindowTextLength ( hEdit ) + 1);
    before_text = (char*)GlobalAlloc(GPTR, ilen + 1);
    
    //use one sprintf with a %s type where the other string are added
    
    sprintf(before_text,"%s<style>\r\n<!--\r\na:hover{color:%s;}\r\n-->\r\n</style>" , before_text, ret_color);
    SetWindowText(hEdit, before_text);
    
    //free mem

  3. #3
    Registered User
    Join Date
    Apr 2002
    Posts
    7
    Since this is an HTML editor i decided to make a function to add text to a edit box in any window.

    Code:
    BOOL InsertText(HWND hnd, INT id, LPSTR txttoins2){
    BOOL bSuccess = FALSE;
    HWND newHandle = GetDlgItem(hnd, id);
    int LenOLD = GetWindowTextLength(newHandle);
    
    
    char* txttoins, *OLDTEXT;
    txttoins = (char*)GlobalAlloc(GPTR, strlen(txttoins2)+1);
    strcpy(txttoins, txttoins2);
    OLDTEXT = (char*)GlobalAlloc(GPTR, LenOLD+strlen(txttoins2)+1);
    GetWindowText(newHandle, OLDTEXT, LenOLD+1);
    strcat(OLDTEXT, txttoins);
    if (SetWindowText(newHandle, OLDTEXT)){
    bSuccess=TRUE;
    }
    
    
    GlobalFree(OLDTEXT);
    GlobalFree(txttoins);
    return bSuccess;
    
    
    }
    My old code was very sloppy but I am a newbie. Is this one any better? Another question is how do I set up a menu to copy,paste,select text in hEdit (handle: hwnd). Do I have to use clipboard functions or is there an easier way to do it?

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