Generic Graph Lib in Delphi, Speed of ObjectList?

we are developing an generic graph library using DELPHI XE7. The target graph size is ~ 1 MIO vertex nodes and ~ 1...

Delphi TGIFImage animation issue with some GIF viewers?

I have discovered that animated GIFs created using Delphi 2009's TGIFImage sometimes doesn't play correctly in some ...

Web page scraping in Delphi?

DO you know a library for Web page scraping for Delphi. Like Beautiful Soup or Scrapy for Python ? ...

Invalid Pointer Operation?

I have a form that contains a TOpenDialog component (OpenDialog1) and a button. OpenDialog1 has the ofAllowMultiSele...

Fast convolution algorithm?

I need to convolve two one dimensional signals, one has on average 500 points (This one is a Hanning window function...

Why does CreateProcess give error 193 (%1 is not a valid Win32 app)?

The code below fails to start documents. I get error 193 (%1 is not a valid Win32 app). Starting executables work fi...

Cause of Range Check Error (Delphi)?

Here's a condensed version of some code that causes both a Range check error and an overflow error, should I turn on...

Invalid Floating Point Operation?

I keep getting this error "Invalid Floating Point Operation". I'm on Delphi 7. uses Windows, Messages, SysUtils, V...

What do I do when my program crashes with exception 0xc0000005 at address 0??

My Delphi program runs as an NT service and has been running fine for more than 2 months and then it stops suddenly ...

Embed a word menu in OleContainer?

I use an oleContainer to embed a Word document. That worked out so far. However, the menu is outside the oleContaine...

Drawing a hexagon?

Using Firemonkey XE2 , I was able to use the TCube component to create a cubed map, But I am now wanting a hexagon m...

TChart - Dont plot values that are less than 0??

Introduction I am using the TChart component and am finding the options rather confusing and hard to find what I ne...

Delphi TChart Bar Width?

I'm trying to figure it out how to set a fixed size to the bars' width in TChart. I've tried to search a lot for a ...

Modify a formula from calculating around a circle to around an oval??

I have this formula in a function below. It's a fairly simple concept, yet this formula took me almost 2 weeks to ge...

Teechart TChart Legend - increase count of items?

I have a TDBChart and it shows a legend, about 25 lines or so. How can I increase the item count wich are shown i...