Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Disabling TabbedNoteBook Tabs...

Posted on 1998-05-11
7
Medium Priority
?
913 Views
Last Modified: 2012-06-27
Hello, in my Delphi v3 app I have a TabbedNoteBook with 10 tabs. When I am in a certain one of these tabs, I wish to prevent the user from clicking on another tab. The only way he should be able to get to another tab is by pressing a specific button on the screen...not by clicking another tab. Therefore I essentially want to 'disable' the tabs when he is in this screen. I try 'TabbedNoteBook1.enabled:=false', but this not only disables the tabs, but disables every component within the tab the user is currently on - definitely not what I want. How can I just disable the tabs from being clicked but still leave the components enabled?

Cheers!
  Shawn Halfpenny
  drumme59@sprint.ca
0
Comment
Question by:aztec
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 8

Expert Comment

by:ZifNab
ID: 1344343
Hi aztec,

I think it's not possible... At least when I found out of this problem I didn't found a solution to it. But maybe somebody did... It's already a long time ago.

You should use pagecontrol which can handle this

Regards, ZiF.
0
 

Accepted Solution

by:
BigMadDrongo earned 200 total points
ID: 1344344
You need to monitor the changing event.  The tab index during the changing event is the previous tab.  What you need to do is define a global variable to store the starting tab, and in the onchange event, set the current tab to that.

E.G.

type
  MyForm(TForm)
    Tab: TTabControl
  end;

var
  MyTab: integer;
  Allowed: boolean;

procedure MyForm.TabChanging(Sender: TObject);
begin
  MyTab := Tab.TabIndex;
end;

procedure MyForm.TabChange(Sender: TObject);
begin
  if Allowed then
    exit;
  if Tab.TabIndex <> MyTab then
    Tab.TabIndex := MyTab;
end;

procedure MyForm.ButtonClick(Sender: TObject);
begin
  Allowed := True;
  Tab.TabIndex := Value;
  Allowed := False;
end;

This doesn't quite stop the users changing the tabs.  What it does do is detect the tab change and stores the initial tab.  Then it checks an allowed flag.  If this allowed flag is set to true (i.e. the change was caused by the button click) then the change happens, if the allowed flag is false, it changes the tab back to the original value.

If you want any furthur information, leave a comment.

BigMadDrongo
0
 
LVL 3

Expert Comment

by:d4jaj1
ID: 1344345
PageControl doesn't 'really' do what he wants either.  You CAN make a specific tab or page invisible using Page Control, however, you can't disable the tab, e.g., make the text light grey.  Maybe someone created a customer component to do this.
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 4

Expert Comment

by:itamar
ID: 1344346
Hi Aztec,

If you re-opens the question I know of a TabControl that does excatly what you want and more...

0
 
LVL 4

Expert Comment

by:itamar
ID: 1344347
Just forgot to say: it's shareware (about $40).
0
 
LVL 8

Expert Comment

by:ZifNab
ID: 1344348
Yep, there are customer components...
0
 

Author Comment

by:aztec
ID: 1344349
Works great...thanks!
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

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

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
Suggested Courses

704 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