Search found 8 matches

by webadm
Mon Apr 15, 2019 1:54 pm
Forum: VCL
Topic: Drawing big plots
Replies: 4
Views: 664

Re: Drawing big plots

Idea for a new feature. How dificult would be to add a feature like that pseudo code from here: TChart->BeginUpdateFromThred() - TChart draw on GUI, and if something needs to be draw gets draw on a temporary Bitmatp - User calls to Canvas methds draw on the temporary Bitmap - Then TChart canvas rend...
by webadm
Mon Apr 15, 2019 1:11 pm
Forum: VCL
Topic: Drawing big plots
Replies: 4
Views: 664

Re: Drawing big plots

Ok .Thanks.
by webadm
Thu Apr 11, 2019 2:21 pm
Forum: VCL
Topic: Drawing big plots
Replies: 4
Views: 664

Drawing big plots

I'm using TeeChart VLC with C++ Builder Pro Tokyo. I have an application that has a lot of plots and sometimes with a lot of points. The applciation is very dynamic so the plots get redraw many times. As far as I know VLC UI can only be updated via main thread, leaving to the main thread only the ta...
by webadm
Wed Jul 11, 2018 9:28 am
Forum: VCL
Topic: TeeChart direct access to data
Replies: 8
Views: 1917

Re: TeeChart direct access to data

Yeray, I will take a look a the example and see if that could be a solution for my problem. When I did it years ago I only declared virtual a function on the TChart sources and I was able to do the customization on my side and was quick. But I don't have the sources anymore and I don't remember what...
by webadm
Mon Jul 09, 2018 6:16 pm
Forum: VCL
Topic: TeeChart direct access to data
Replies: 8
Views: 1917

Re: TeeChart direct access to data

Yeray, The pointer does not do the trick to my problem because I still I have to have a copy of the data in a array of doubles somewhere that is consecutive in memory. Every time the visualization condition changes. I cannot use the TFastLineSeries because I use features that are not available on th...
by webadm
Mon Jun 25, 2018 4:57 pm
Forum: VCL
Topic: TeeChart direct access to data
Replies: 8
Views: 1917

Re: TeeChart direct access to data

>> >>Not only. I use all sort of non DB series. Does what you said about TChartValueList applies to all series? >> Yes, all the series inherit from TeeChartSeries, and there's where the XValues and YValues properties are declared as TChartValueList. Some series add extra arrays, like the 3D series, ...
by webadm
Fri Jun 22, 2018 9:44 am
Forum: VCL
Topic: TeeChart direct access to data
Replies: 8
Views: 1917

Re: TeeChart direct access to data

>> Hello Javier, Hi Yeray! Thanks for your reply >> I imagine you are working with a TFastLineSeries Not only. I use all sort of non DB series. Does what you said about TChartValueList applies to all series? >> As all the series, this series has XValues and YValues properties, which are instances of...
by webadm
Wed Jun 20, 2018 9:26 am
Forum: VCL
Topic: TeeChart direct access to data
Replies: 8
Views: 1917

TeeChart direct access to data

Hi All, Time ago, back to 2001 I was working in an application with C++ Builder that required frequent plot updates of a lot of points in a TimePlot. All I tried to make it faster was not fast enough, and then I took a look at the sources and I've found that I could make virtual one method (I can't ...