Solved

Popup Window Focus

Posted on 2004-05-01
1
816 Views
Last Modified: 2010-04-04
I need to create a small Popup window which will contain a number of controls (not necessarily controls with handles). The Popup Window must be able to overlap the Parent Form border, in a similar manner to a Combobox's drop down portion.

(Note the Popup Window is NOT a ListBox, though, in principle, it could contain a ListBox as one of it's controls).

Now, the part I'm having difficulty with: When you click on a control in the Popup window the Parent Form **must** retain focus. The Popup Window must stay open and on top of the Parent Window until manually closed.

At present I'm using the following code in the CreateParams:

procedure TPopupWindow.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  Params.Style := Params.Style or ES_MULTILINE or WS_POPUP;
end;

And this to return Focus to the main form when a control is pressed:

procedure TPopupWindow.ControlPressed(Sender: TObject);
begin
  FMainForm.SetFocus;

 // ... More code to handle the mouse click or keyboard input ...

end;

When you click on a control in the Popup Window the Parent Form looses focus which causes a "flashing effect" of the Parent Form's border when I programmatically return focus to it.

Other info:

The Popup Window does *not* have a Caption. Does *not* have BorderIcons or in fact a Border. The Popup Window's background must be opaque when both inside and outside the Parent Forms boundaries.
0
Comment
Question by:JQL
[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
1 Comment
 
LVL 12

Accepted Solution

by:
Ivanov_G earned 250 total points
ID: 10967276

   in the constructor you send The form handle.

  constructor TPopupMenu.Create (...your params here...; FormHandle : THandle);
  begin
     ......
  end;

  in the constructor you set FormStyle := FormStyle + [fsStayOnTop];

  procedure TPopupMenu.ShowPopup(....your params here...);
  begin
    Show;
    .....
    // activate the form using it's handle
    SendMessage(FormHandle, WM_ACTIVATE, 0, 0);
  end;
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

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…
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…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

738 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