[Last Call] Learn about multicloud storage options and how to improve your company's cloud strategy. Register Now

x
?
Solved

Delphi Programming question

Posted on 1997-07-09
2
Medium Priority
?
149 Views
Last Modified: 2010-04-06
Hi!

I've derived a component from aa tpaintbox which draws a shadow under each of it's childs... It runs well, but I would like to repaint some parts of the shadows when one child-windows changes it's position, size or dissapeares at all.

How can I get a notification when a child-window changes it's bounds?

It's not possible to use the methods provided by the child-windows. I need them for other purposes. I read the windows api, but didn't find a message which does what I want.

any ideas?

  nils pipenbrinck

Thank you.
0
Comment
Question by:nils pipenbrinck
[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
2 Comments
 
LVL 1

Accepted Solution

by:
ygolan earned 0 total points
ID: 1338502
Nils,

To get a notification when a child is destroyed, override the Notification method of your paint control - it will be called wheneven a component is added/removed from the form.

To detect when a child is resized, you need to subclass its window, and capture the WM_WINPOSCHANGED message. Email me if you need source code which will help you to perform the subclassing at ygolan@hyperact.com.

0
 
LVL 4

Author Comment

by:nils pipenbrinck
ID: 1338503
thank you..

your answer was really excelent..

Nils
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

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

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
Suggested Courses

650 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