Strikeout not shown for font less than 8pt

[imd-soft]

Hi,
We are working with WPF Tchart objects that have strikeout (TchartObject.Graphics3D.Font.Strikeout whereasTchartObject is of type Steema.TeeChart.WPF.TChart ).
The strikeout disappears when the font is less than 8pt.
Is it a known issue? Is there a workaround for strikeout?

Thanks,
Daniel

[Christopher]

Hello Daniel,

Which version of TeeChart.WPF.dll are you using? The latest public version using this code:

Code: Select all

    private void InitializeChart()
    {
      tChart1.AfterDraw += TChart1_AfterDraw;
    }

    private void TChart1_AfterDraw(object sender, Steema.TeeChart.WPF.Drawing.Graphics3D g)
    {
      g.Font.Size = 6;
      g.Font.Strikeout = true;
      g.TextOut(100, 100, "Text Strike Out");
    }

gives me this:

strike_out.PNG (2.81 KiB) Viewed 24783 times

is this the same as what you get at your end?

[imd-soft]

Thanks Christopher,
It looks like the functionality we are missing.
We are using Teechart version from 2015, so we we'll download the new version and see if it fixes the issue.
I'll update you.

Thanks,
Daniel

[imd-soft]

When trying to install TeeChartNET2015_4.1.2015.12160.exe I get the following error:
"Unable to download component WPF, Store and UWP: Component file version does not match"
What could be the issue? Is there a workaround?

All i want is to get the new version of TeeChart.WPF.dll

Btw, when installing the version I chose VS 2015. Why is it related? If we upgrade to VS2017 or work with VS2013 we won't be able to use this dll that specifically was downloaded for VS 2015?

Thanks,
Daniel

[Christopher]

Hello Daniel,

When trying to install TeeChartNET2015_4.1.2015.12160.exe I get the following error:
"Unable to download component WPF, Store and UWP: Component file version does not match"
What could be the issue? Is there a workaround?

I've just downloaded TeeChartNET2015_4.1.2015.12160.exe from steema.com and this installer successfully installed all the available components. If you experience further problems with this installer, please contact sales@steema.com who will be able to provide you with an alternative installer.

Btw, when installing the version I chose VS 2015. Why is it related? If we upgrade to VS2017 or work with VS2013 we won't be able to use this dll that specifically was downloaded for VS 2015?

It is related because the installer performs operations which are specific to different VS versions, such as installing components into the ToolBox and installing Help files into the VS Help system. The TeeChart assemblies as such (TeeChart.dll, TeeChart.WPF.dll etc.) are of course compatible with all VS versions.

[imd-soft]

I'm sorry, I didn't write the version name correctly - I'm trying to install the latest version of course - TeeChartNET2017_4.1.2017.03140.exe
Getting the same error again.
I'll contact sales@steema.com regarding this issue.

Thanks,
Daniel

[imd-soft]

Hi,
I still can't verify the strikeout fix because I can't install TeeChartNET2017_4.1.2017.03140.exe properly.
I sent an email to sales@steema.com last week but didn't get any answer yet.
Who can help me with the issue?

Regards,
Daniel

[Christopher]

I sent an email to sales@steema.com last week but didn't get any answer yet.
Who can help me with the issue?

Last Friday and yesterday were national holidays here (see "Office Hours and Holidays" here) which probably affected the speed of response - have you received a satisfactory reply now?

[imd-soft]

Hi,
I've received a reply and got the dll today. Thanks!

But, unfortunately when testing out product with the updated TeeChart.WPF.dll (4.1.2017.2143) for 4.5 .Net, x86, I see the same strikeout issue:
When font is smaller than 8pt the strikeout is hidden. Can you please check this issue?

Regards,
Daniel

[Christopher]

Hello,

When font is smaller than 8pt the strikeout is hidden. Can you please check this issue?

I checked this issue earlier in the thread and confirmed that the code I posted worked. Here is a screenvideo of the same code working with the .NET 4.5 version of TeeChart.WPF.dll:

https://www.screencast.com/t/lcTGUeND

[imd-soft]

Thanks Christofer,
I created a POC project and saw that that strikeout is visible for fonts smaller than 8pt, although in our product
we don't get the strikeout drawn.
We'll have to investigate this issue and update you with the results.

Thanks again,
Daniel

[imd-soft]

Hi Christopher,
We''ve succeeded reproducing the issue with your code by adding the following lines:

tChart.Aspect.TextFormattingMode = TextFormattingMode.Display;

This way you won't get the strikeout for fonts smaller than 8pt.
The issue is related to TextFormattingMode.Display.
If we change the TextFormattingMode to TextFormattingMode.Ideal the strikeout will be visible.
For different font families we get a similar issue, though for Verdana , the strikeout is invisible from 7pt and lower.
For "Segoe UI" the issue is reproduced starting from 8pt and lower.

Is there a way to show the strikeout for TextFormattingMode.Display for smaller fonts?

Regards,
Daniel

[Christopher]

Hello Daniel,

I

Is there a way to show the strikeout for TextFormattingMode.Display for smaller fonts?

I'm not sure. It does seem the problem is with WPF and not TeeChart. Here's a UserControl you can test to see what I mean:

Code: Select all

  public partial class UserControl1 : UserControl
  {
    public UserControl1()
    {
      InitializeComponent();
    }

    protected override void OnRender(DrawingContext drawingContext)
    {
      Rect clientRect = new Rect(RenderSize);

      if (clientRect.Height == 0) clientRect.Height = 300;
      if (clientRect.Width == 0) clientRect.Width = 400;

      drawingContext.DrawRectangle(Brushes.LightBlue, null, clientRect);

      Typeface font = new Typeface(new FontFamily("Verdana"), FontStyles.Normal, FontWeights.Normal, FontStretches.Normal);

      FormattedText text = new FormattedText("Hello World", CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
        font, 6 * 1.4, Brushes.Black, null, TextFormattingMode.Display);

      text.SetTextDecorations(TextDecorations.Strikethrough);

      drawingContext.DrawText(text, new Point(20, 20));

      base.OnRender(drawingContext);
    }
  }

and this is what it gives me:

strikeout.PNG (2.44 KiB) Viewed 24689 times

[imd-soft]

Hi,
Could you open a call regarding this issue to Microsoft .Net framework support?

Regards,
Daniel