Copy to clipboard without crash

christopher00 · Post by **christopher00** » Wed Jun 21, 2006 9:03 pm

Anyone know of a way to use the TRichViewEdit and copy data to the clipboard without the application crashing if the data in the TRichViewEdit is quite large? Windows Notepad can handle copying text within seconds after clicking Edit-Copy, or Ctrl+C, whereas if you have a large amount of data (i've tried just text) in the TRichViewEdit and do Ctrl+C (or use the Copy procedure), the application with the TRichViewEdit crashes.

Ideas?

Post by **Sergey Tkachenko** » Thu Jun 22, 2006 3:48 pm

Does it really crash? It just may take very long time.
It's because a standard TMemoryStream is used. TMemoryStream is unefficient when writing a large amount of data, because many memory reallocations occur.
In the next update, TRichView will use another stream class, with larger memory delta. Copying will be much faster.

shmp · Post by **shmp** » Sun Jun 25, 2006 2:28 am

Just to confirm. Have been using ctrl-c, ctrl-x and ctrl-v for a very long time and never faced a crash. It may have been very sloooooow because some other applications are running in the background or the file is just tooooo big.

Good luck.

Post by **Sergey Tkachenko** » Tue Jun 27, 2006 6:43 pm

Copying may be really very slow if document contains multimegabyte text.
In the current version, it can be improved only by modifying VCL source (changing MemoryDelta from Classes.pas to lager value (power of 2)). In the next update, this problem will be fixed without modifying VCL source.