Solved

Turning off the hint for a tree node

Posted on 2001-08-20
11
302 Views
Last Modified: 2010-04-04
Hi,
Can anyone tell me how i can turn off the hint that pops up everytime my mouse moves on the tree node of a tree view (provided that it is cut). I want to suppress that. Is there anyway i can accomplish that.
Note: it has nothing to do with Showhint property.

Thanx in advance.
Hammad
0
Comment
Question by:hammadmajeed
  • 6
  • 2
  • 2
  • +1
11 Comments
 
LVL 4

Accepted Solution

by:
fva earned 200 total points
ID: 6405356
It's a tooltip, not a hint. Very annoying.
My workaround:

unit UTVPatch;
// deactivates tooltip for TTreeView
// Usage: Call PatchTreeView once, after creating the TreeView, somewhere in the Show section of the form (where there is a "true" TreeView handle)

interface

uses Windows,Messages,Classes,ComCtrls,commctrl;

procedure PatchTreeView(atv:TTreeView);

implementation

var FTVList:TList;
    hhook:THandle;

function HookProc(nCode:integer;wPar:WPARAM;lPar:LPARAM):LRESULT;stdcall
var idx:integer;
begin
     if nCode=HC_ACTION then begin
        with PCWPStruct(lPar)^ do begin
             idx:=FTVList.IndexOf(Pointer(hwnd));
             if idx>=0 then begin
                // target is one of our monitored TTreeViews
                if message=WM_NOTIFY then begin
                   if PNMHdr(lParam)^.code=TTN_NEEDTEXTW then begin
                      SendMessage(PNMHdr(lParam)^.hwndFrom,TTM_ACTIVATE,0,0);
                      FTVList.Delete(idx);
                      if FTVList.Count=0 then begin
                         UnhookWindowsHookEx(hhook);
                         hhook:=0;
                      end;
                   end;
                end;
             end;
        end;
        Result:=0;
     end else
        Result:=CallNextHookEx(hhook,nCode,wPar,lPar);
end;

procedure PatchTreeView(atv:TTreeView);
begin
     if FTVList.IndexOf(Pointer(atv.Handle))>=0 then exit;
     FTVList.Add(Pointer(atv.Handle));
     if hhook=0 then
        hhook:=SetWindowsHookEx(WH_CALLWNDPROC,HookProc,0,MainThreadID);
end;

initialization
   FTVList:=TList.Create;
   hhook:=0;
finalization
   FTVList.Free;
   if hhook<>0 then begin
      UnhookWindowsHookEx(hhook);
      hhook:=0;
   end;
end.

Basically it "knocks out" the tooltip window the first time it wants to pop-up.

F.
0
 
LVL 17

Expert Comment

by:inthe
ID: 6405386
i havent tried it but dont see why it wouldnt work:
in object inspector set tooltips to false.

or on a mouse event
treeview1.tooltips := false;
0
 
LVL 4

Expert Comment

by:fva
ID: 6405410
Depends on Delphi version.
0
 
LVL 3

Expert Comment

by:smurff
ID: 6405463
Havent tried it but its what Ive ot listed as doing the job... worth a try.
regards
Smurff

procedure TForm1.FormCreate(Sender: TObject);
 begin
   SetWindowLong(TreeView1.Handle,
                              GWL_STYLE,
                              GetWindowLong(TreeView1.Handle,GWL_STYLE) or $80);
 end;
0
 
LVL 4

Expert Comment

by:fva
ID: 6405494
Well, I admit, I was overkilling. Version 4.70 and above of commctrl (I think IE 3.0 and above) support the TVS_NOTOOLTIPS which is $80 and unless you are using a very old version of the library smurff is right.

F.
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 4

Expert Comment

by:fva
ID: 6405501
And it works, too. Nice to learn new things.
0
 

Author Comment

by:hammadmajeed
ID: 6407198
the codes u ppl wrote only work in win2k, if u try that code in win95/98, it still is displaying tooltip. i think it is coz of older version of commctrl, is it right?

Hammad
0
 
LVL 4

Expert Comment

by:fva
ID: 6408747
Installing a newer Internet Explorer (e.g. 5.0 or later) _will_ fix it even on 95/98.

F.
0
 

Author Comment

by:hammadmajeed
ID: 6409304
cant it is possible with the default version that is installed with 95/98(without any kind of upgradation).

Hammad
0
 
LVL 3

Expert Comment

by:smurff
ID: 6409509
I guess not. If the functions not in the .dll then you`ll have to upgrade if you want this functionality. If I were you put something in your app. that will check the version number and if its the wrong one then automatically run the upgrade.

regards
Smurff
0
 
LVL 4

Expert Comment

by:fva
ID: 6412495
Thank you Hammad for accepting my comment as answer. It's a nice thing to get points while learning new tricks, too :)

F.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Get a Metafile from Clipboard and convert it into a PNG to save to file or stream. 2 96
Dev Express grid collapse 2 39
LAN or WAN ? 11 81
Create a path if not exists 7 69
This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now