Thanks SteveP, You are right. I have looked in source code TNearestTool.GetNearestPoint and TNearestTool.ChartMouseEvent and it seems that search is always performed from beginning to end of series each time user moves mouse in chart. It is not acceptable for performance when we have more than 20000...

Thanks Narcis,

I have tried this solution and effectively performances are highly improved. But in this case, the circle around focused point is not painted . In our application, we always need a black circle around nearest point.
So, do you have another solution to propose?

Regards
Gerald

Hi Narcis, :arrow: Our References : Defect ID : 5607 Headline : [FGP Temporal] [TChartPro] Performance issue with the nearest point tool :arrow: Nearest Point tool has bad performance when series contains many points. Display Performance is very bad with 100000 points. How can we obtain best perform...

We have discovered a defect when we use BoxSeries. When only one BoxSeries is displayed in chart and a zoom is performed on BoxPlot, only half of box is displayed at left of chart (zoomed boxplot is not centered on chart).

Dear Narcis,
We use TChartPro in our application and it will be interesting for us to test beta release before its official release.
Please, could you include us in your "beta tester team"?
Thanks you

Gerald
Si Automation

Hi, :arrow: We have a problem with the capability of drag marks. It seems that drag marks truncate its text after about 270(to be confirmed) characters, or in our case, at the 8th/9th line of our drag mark in exemple that I have posted in newsgroup :?. :?: How can we extend the number of characters ...

Hi Narcis, The last source (release >7.07) that you have provided fix this defect. But we have a border effect: a problem occurs for series color. Regarding color problem on new TChartPro, I found that when we show outline for a series, the outline is shown correctly with specified color but the ser...

Hi, :arrow: "Nearest point" tool used in a BoxPlot chart containing more than one BoxPlot (at different positions). The "Nearest Point" tool seems to work horizontally instead of vertically (BoxPlot works like a "vertical" series). :idea: Steps to reproduce : - Create a chart containing two or more ...

:arrow: After user adds drag marks in a chart and chart is exported; Drag marks are vertically shifted in exported image file (occurs for BMP, JPG, GIF and PCX) and clipboard. :arrow: occurs with TeeChartPro v7.07 and older, with Delphi 6 and WinXP :?: Do you know a solution in order to obtain the s...

Hi Narcis, :arrow: We have recompiled the source of example that I have sent to you with TeeChartPro v7.07 and we have always the same error during execution :cry:. So, I don't understand why it's working in your environment and not in ours. :?: Maybe your compiler or execution environment is differ...

Thanks Narcis, We use the TeeChartPro v7 (without .xx). Because internally, it's a long procedure to install a new version of the component, could you send me the build that you have compiled with the v7.07 version? I will rebuild our project with v7.07 at the beginning of next week. Thanks and Best...

I have prepared a short example of environment where bug occurs. The chart contains two drag marks.
Click on right mouse in chart and choose "Export PDF".
Observe "Access violation" error message.

The example has been sent to news://www.steema.net/steema.public.attachments newsgroup.

Hi, :arrow: We have a chart containing drag marks (graphical items managed by TDragMarkTool). Export to images formats (BMP, JPG, GIF, PCX) works correctly but Export to PDF fails and an access violation occurs. I think it's due to drag marks. :?: Is it a TChartPro bug? :?: Is it possible to correct...