Axis label height calculation does not consider multiline

[Technicon]

Hi,

Axis label height calculation does not consider multiline. When I add SrollPager and axis is multiline there is not enough place to display labels correctly.

scrollpagermultiline.png (123.41 KiB) Viewed 10196 times

Best Regards,
Grzegorz

[Yeray]

Hello Grzegorz,

I could reproduce it (without using scrollpager tool) so I've added it to the public tracker:
http://bugs.teechart.net/show_bug.cgi?id=1684

[Yeray]

Hello Grzegorz,

I fixed it for the next maintenance release.
Since you are a source code customer, you could apply the modification in your sources (and recompile them). At the TChartAxis.GetAxisSeriesLabel function in TeEngine.pas you'll find:

Code: Select all

talPointValue : if MandatoryAxis=Self then // DB
                   ALabel:=LabelValue(MandatoryValueList.Value[AIndex])
                else
                   ALabel:=LabelValue(NotMandatoryValueList.Value[AIndex])

Add "talValue" so it ends looking like this:

Code: Select all

talPointValue,
     talValue : if MandatoryAxis=Self then // DB
                   ALabel:=LabelValue(MandatoryValueList.Value[AIndex])
                else
                   ALabel:=LabelValue(NotMandatoryValueList.Value[AIndex])

[Technicon]

Hello,

I've apply Your fix but there is some more problems especially when one enable axis title.
Here is an example

Code: Select all

	TChartSeries* pTChartSeries = Chart1->AddSeries(new TLineSeries(Chart1));
	if(pTChartSeries)
	{
		dynamic_cast<TLineSeries*>(pTChartSeries)->Stairs = true;

		pTChartSeries->Title = "Series" + IntToStr(Chart1->SeriesCount() - 1);
		pTChartSeries->XValues->DateTime=true;
		pTChartSeries->FillSampleValues(100);
	}

	Chart1->BottomAxis->ExactDateTime = true;
	Chart1->BottomAxis->Increment = DateTimeStep[dtFifteenMinutes];
	Chart1->BottomAxis->DateTimeFormat = "c";
	Chart1->BottomAxis->LabelsMultiLine = true;

	Chart1->BottomAxis->Title->Caption = "Axis Title";
	Chart1->BottomAxis->Title->Visible = true;
	Chart1->BottomAxis->Title->Transparent = false;
	Chart1->BottomAxis->Title->Color = clRed;

When chart is unzoomed it looks like this

unzoom.png (25.4 KiB) Viewed 10154 times

There is a lot of free space below axis titile

When one try to zoom and labels are really multiline labels are cover axis title.

zoom.png (22.13 KiB) Viewed 10150 times

Best Regards,
Grzegorz

[Yeray]

Hello Grzegorz,

I could reproduce the problem you are reporting so I've re-factored the fix for #1684.
Since you own the Source Code I'll send a mail with the modified TeEngine.pas unit to the mail you have registered in this forum.

[Technicon]

Hello,

The fix that You send me works, but only for standard axis. On custom axis title overlap labels when multiline is enabled.


Best Regards,
Grzegorz

[Yeray]

Hello,

This is a different issue, so I've created a new ticket:
http://bugs.teechart.net/show_bug.cgi?id=1692