?
Solved

About component building

Posted on 2002-04-28
5
Medium Priority
?
167 Views
Last Modified: 2010-04-04
I need help on this:
  To build a component with a button on it, when the button is clicked, a dialog style form will be displaying,
on this form:
           1. certain buttons like OK, Add.
           2. when button OK on the form is clicked, the form is closed, an event e.g. OnCancel in the component will be connected to the OK button's OnClick event.
           3. the component will get certain result calculated at the form when OK button is clicked, an event AfterCalc in the component is fired.
 
  my problems: how can I have a component like this with its properties and event handlers that relate to a form that is only create when requied  
0
Comment
Question by:JasBei
[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
5 Comments
 
LVL 11

Expert Comment

by:robert_marquardt
ID: 6976509
Simply set the ModalResult properties of the buttons on the modal form.
Connecting an OnCancel event is not needed and not (easily) possible.
Move your modal form in Project : Options : Forms to the rigt list.
In the OnClick of the main form button do something like this:
var
  ModRes: Integer;
begin
  ModForm := TModForm.Create(Self);
  ModRes := ModFrom.ShowModal;
  if ModRes = mrOK then
  ...
  ModForm.Free;
0
 

Author Comment

by:JasBei
ID: 6979129
I would like to clarify my problem:
      I tried to use a mordal form just as you have pointed out, but if on the mordal form there is a button I would like to use it to fire an event in my component, and this button is not going to shut the mordal form after all this happening, so I couldn't use ModResult here.
0
 
LVL 11

Expert Comment

by:robert_marquardt
ID: 6979473
You can always call methods of the main form in response to the button click on the modal form.
0
 
LVL 4

Accepted Solution

by:
nestorua earned 400 total points
ID: 6981723
HI,
If I am not mistaken you don't know how to create a component which has a button as a part of it and this "part" has its own event OnClick?
If so do the following (see an example):
TMyPanel=class(TPanel)
private
FButton: TButton;
FOnButtonClick: TNotifyEvent;
...
protected
 procedure MyButtonClick(Sender: TObject)
published
 property OnButtonClick: TNotifyEvent read FOnButtonClick
                                      write FOnButtonClick;
end;
...

constructor TMyPanel.Create(AOwner: TComponent);
begin
  inherited;

   FButton:=TButton.Create(Self);  
   with FButton do
    begin
     Left:=...
     Top:=...
     Parent:=Self;
     OnClick:=MyButtonClick;    
  ...
    end;
end;
procedure TMyPanel.MyButtonClick(Sender: TObject)
begin
  If Assigned(FOnButtonClick)
   then FOnButtonClick(Self);
end;

Sincerely,
Nestorua.
0
 
LVL 1

Expert Comment

by:pnh73
ID: 9004269
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:

Accept answer from nestorua

Please leave any comments here within the next seven days.
 
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
 
Paul (pnh73)
EE Cleanup Volunteer
0

Featured Post

New benefit for Premium Members - Upgrade now!

Ready to get started with anonymous questions today? It's easy! Learn more.

Question has a verified solution.

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

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…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
This course is ideal for IT System Administrators working with VMware vSphere and its associated products in their company infrastructure. This course teaches you how to install and maintain this virtualization technology to store data, prevent vuln…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Suggested Courses

718 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