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HOWTO: Set smoothing mode for text in a markup cel

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adrien View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adrien Quote  Post ReplyReply Direct Link To This Post Topic: HOWTO: Set smoothing mode for text in a markup cel
    Posted: 09 October 2017 at 6:44pm
Hi

Is it possible to set text smoothing mode for a report control cell?

I've been searching for a long time, and tried using markup attributes in the markup itself (doesn't work).

I don't want to have to override OnPaint to set the mode on the DC, surely there should be a way when you set up a markup context to give it information about how you want it to draw, and it pass it to the DC?

Adrien
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adrien Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2017 at 6:48pm
P.S. I want to do this because the default text rendering is very ugly and jaggy.

I'm quite disappointed that the default isn't to use a decent text rendering mode.  I can't imagine anyone ever wants their text to look unaliased.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adrien Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2017 at 6:52pm
CXTPMarkupDrawingContext constructor (all of them) set 

m_bUseTextSmooting(FALSE)

are you kidding me?

You need to make this accessible via the markup context so we can turn it on without patching your code.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote olebed Quote  Post ReplyReply Direct Link To This Post Posted: 11 October 2017 at 8:27am
Hello adrien,

You can see how it works in our sample  Samples\Utilities\MarkupPad\MarkupPadView.cpp
void CMarkupPadView::OnPaint() 
{
    CPaintDC dc(this); // device context for painting
    
    CXTPClientRect rc(this);

    CXTPBufferDC dcMem(dc);
    dcMem.FillSolidRect(rc, GetSysColor(COLOR_WINDOW));

    CXTPMarkupDrawingContext dcMarkup(this, dcMem);
    dcMarkup.SetSmoothingMode(GetDocument()->GetSmoothingMode(), GetDocument()->IsTextSmooting());
    DrawMarkup(&dcMarkup, rc);
}

Regards,
 Oleksandr Lebed
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adrien Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2017 at 7:54pm
Hi

the problem with this is that means I need to override OnPaint.

We don't currently do that.  It should be possible to set smoothing without having to override OnPaint
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adrien Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2017 at 9:48pm
Also, that's for a markup pad view, which is your own class.

I need to get this into a report control.  If I override OnPaint for CXTPReportControl I have to do a LOT of copy / paste figure out how to make it a different kind of device context (e.g. CPaintDC becomes CXTPMarkupDrawingContext etc).

This is just error prone.  It would be very simple since you allow setting a report control to use markup if you would allow the natural extensions of that, e.g. set smoothing.

Either that or fix the broken support for the XAML font quality attributes so they actually work.

If Paint() were virtual I could override it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adrien Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2017 at 9:54pm
guess not, since CXTPMarkupDrawingContext doesn't derive from CDC I can't pass it into Paint.

Looks like I need to patch your DLL.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adrien Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2017 at 10:39pm
OK, I've spent now about a day on this.

It looks like fundamentally the report control does not support smooth text in report controls.

The CXTPMarkupUIElement class has no attribute to remember text smoothing (or any smoothing)

for markup report row items rendering comes down to 

CXTPReportRecordItem::OnDrawCaption

this calls 

XTPMarkupMeasureElement(m_pMarkupUIElement, rcItem.Width(), INT_MAX);
XTPMarkupRenderElement(m_pMarkupUIElement, pDrawArgs->pDC->GetSafeHdc(), &rcItem);

There's no opportunity to set any features on the markup DC

I guess I could override  CXTPReportRecordItem::OnDrawCaption

but Thats way too much work for such a simple task.

If I'm missing something (apart from a sense of humour) please can you tell me how I can get smooth text in a derived report control class which uses markup.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote olebed Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2017 at 4:20am
Hello adrien,

Yes there is a really problem.  I have confused CXTPMarkupDrawingContext and CXTPMarkupContext.  CXTPMarkupDrawingContext is created temporary on every measuring or drawing of ReportItems with markup.

So I think good solution will be setting this smoothing option to CXTPMarkupContext which more public than CXTPMarkupDrawingContext. Then every time on creating CXTPMarkupDrawingContext the smoothing option will be copied from CXTPMarkupContext.

Thank you for bringing this to our attention.

Regards,
 Oleksandr Lebed
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