Search found 29 matches

by Toreba
Wed Apr 27, 2016 1:47 pm
Forum: VCL
Topic: THistogramSeries % Bar Width
Replies: 10
Views: 3252

Re: THistogramSeries % Bar Width

Yeray,

I think it's the first of these properties that doesn't work, at least using v2014.12.140923 32-bit in XE7. It's easy to show with a simple demo. Do you need me to provide one?

Regards

Toreba
by Toreba
Mon Apr 25, 2016 3:35 pm
Forum: VCL
Topic: THistogramSeries % Bar Width
Replies: 10
Views: 3252

Re: THistogramSeries % Bar Width

Yeray,

I'm sorry, I was wrong (again). THistogramSeries works fine, and doesn't offer a % bar width property. It is In fact TBarSeries for which the property makes no sense. Do you agree with that?

Regards

Toreba
by Toreba
Wed Apr 20, 2016 5:13 pm
Forum: VCL
Topic: THistogramSeries % Bar Width
Replies: 10
Views: 3252

THistogramSeries % Bar Width

Hi, What does this property do? Setting it to 100% produces bars that overlap. The value I need to obtain non-overlapping bars is much less than this, but varies according to the zoom. What does 100% mean? There seems not to be any help for this class. I'm using in TeeChart Pro v2014.12.140923 32-bi...
by Toreba
Wed Apr 20, 2016 12:37 pm
Forum: VCL
Topic: Refreshing a chart containing half a million points
Replies: 5
Views: 1396

Re: Refreshing a chart containing half a million points

Yeray,

Actually I was wrong. The Hover property makes a massive difference when plotting these many points, and the problem disappears if I switch it off.

Sorry for the mistake, and thanks for your advice. Very helpful as ever.

Regards

Toreba
by Toreba
Mon Apr 18, 2016 12:05 pm
Forum: VCL
Topic: Refreshing a chart containing half a million points
Replies: 5
Views: 1396

Re: Refreshing a chart containing half a million points

Hi Yeray, Thanks for your advice. I disabled the hover feature, but this did not seem to have much effect. Which a much smaller chart comprising 2500 data values in a THistogramSeries, it looks as if something else is going on as the user moves the mouse anywhere on the TChart (including the legend)...
by Toreba
Mon Apr 11, 2016 5:44 pm
Forum: VCL
Topic: Refreshing a chart containing half a million points
Replies: 5
Views: 1396

Refreshing a chart containing half a million points

Hi, A user has generated a chart containing multiple series including a THistogramSeries with nearly 200,000 data values, and another TLineSeries containing nearly 250,000 points. You may ask why they do this, as there's no way you can see the detail of so many points on one chart. But, once generat...
by Toreba
Mon Apr 11, 2016 5:26 pm
Forum: VCL
Topic: Scope of TChart.Assign method
Replies: 9
Views: 2533

Re: Scope of TChart.Assign method

Yeray, That's not quite what I'm trying to do. The saved chart stores properties of the TChart and properties of each of its TChartSeries. I want to recover these series properties as well as the chart properties. If I slightly modify your code as below, then clicking the button updates Chart2 with ...
by Toreba
Fri Apr 08, 2016 4:23 pm
Forum: VCL
Topic: Scope of TChart.Assign method
Replies: 9
Views: 2533

Re: Scope of TChart.Assign method

Yeray, Ah yes, I see what you mean. In fact, what I'm trying to do is allow a user to reset all display attributes of a chart by picking a template, i.e. a saved graph with no data, previously streamed to a database BLOB field using SaveChartToStream. But once the saved chart is retrieved, there doe...
by Toreba
Tue Apr 05, 2016 9:57 am
Forum: VCL
Topic: Scope of TChart.Assign method
Replies: 9
Views: 2533

Scope of TChart.Assign method

Hi, The TChart.Assign method seems not to copy series attributes, such as colour and title. To copy series attributes, I have to use separate TChartSeries.Assign calls. But I don't have to do this with TChartAxis. The TChart.Assign method copies axis attributes but not series attributes. Is this the...
by Toreba
Fri Mar 11, 2016 11:04 am
Forum: Wishes and ideas
Topic: View your posts - would like it to show all my posts
Replies: 3
Views: 3611

Re: View your posts - would like it to show all my posts

Hi,

Any further news on this suggestion since two years ago?

Regards

Toreba
by Toreba
Wed Mar 02, 2016 5:13 pm
Forum: VCL
Topic: Saving charts to stream with extra properties
Replies: 3
Views: 1029

Re: Saving charts to stream with extra properties

Yeray, Wow, I didn't know I could do any of that, and it works! Though I notice that if my extra properties are published rather than public, then they appear in the streamed version anyway, it seems, but that default mechanism can't cope with enumerated types. So if I also add them using the method...
by Toreba
Tue Mar 01, 2016 2:44 pm
Forum: VCL
Topic: Saving charts to stream with extra properties
Replies: 3
Views: 1029

Saving charts to stream with extra properties

Hi, I find it very useful to stream complex charts into a database blob field for use as templates. But I need to save extra properties for each series such as the gauging location and variate the data represents, the file from which the data comes, and the index of the series in that file. I can su...
by Toreba
Thu Oct 29, 2015 7:44 am
Forum: VCL
Topic: TChart.AdjustMinMax wrong for inverted axis
Replies: 1
Views: 794

TChart.AdjustMinMax wrong for inverted axis

Hi, I am using TeeChart Pro 2013.09.131119 32-bit VCL in Delphi XE5. I create a TChart with an inverted non-automatic left axis. Adding more series and I then need to reset the extents of the non-automatic axis. To get the extents of the data plotted so far I execute these two lines: TargetAxis.Auto...
by Toreba
Mon Oct 26, 2015 11:33 am
Forum: VCL
Topic: TChartSeries.CalcFirstLastVisibleIndex not quite as expected
Replies: 1
Views: 674

TChartSeries.CalcFirstLastVisibleIndex not quite as expected

Hi, I am using TeeChart Pro 2013.09.131119 32-bit VCL in Delphi XE5. I have a series of three points plotted against a date-time x-axis. I set the x-axis extents such that the axis minimum has the same x-value as the first point, and the axis maximum has the same x-value as the last point. I run TCh...