<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Exchange Server">
<!-- converted from text --><style><!-- .EmailQuote { margin-left: 1pt; padding-left: 4pt; border-left: #800000 2px solid; } --></style>
</head>
<body>
<meta content="text/html; charset=UTF-8">
<style type="text/css" style="">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style>
<div dir="ltr">
<div id="x_divtagdefaultwrapper" style="font-size:12pt; color:#000000; background-color:#FFFFFF; font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi Sean,</p>
<p><br>
</p>
<p>Thank for the advice. I tried the patch, but it doesn't work. The vtkrenderwindow still occupies the left-bottom quarter of widget.</p>
<p><br>
</p>
<p>Best,</p>
<p>Hongzhi</p>
</div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Sean McBride <sean@rogue-research.com><br>
<b>Sent:</b> Friday, September 2, 2016 12:44:48 PM<br>
<b>To:</b> Hongzhi Lan; vtkusers@vtk.org<br>
<b>Subject:</b> Re: [vtkusers] scaling issue of vtkrenderwindow in QVTKWidget for Mac in High Resolution mode</font>
<div> </div>
</div>
</div>
<font size="2"><span style="font-size:10pt;">
<div class="PlainText">On Fri, 2 Sep 2016 19:18:51 +0000, Hongzhi Lan said:<br>
<br>
>I recently tested the example RenderWindowNoUiFile from VTK in Mac ,and<br>
>found the renderwindow only occupies the left-bottom quarter of the<br>
>QVTKWidget (shown in the attached image). I know someone mentioned this<br>
>issue and you can avoid it by using "Open in Low Resolution". But with a<br>
>very good high(retina) resolution mac computer, you can only open a Qt-<br>
>vtk-dependent application in "Low Resolution" and get a blurry GUI,<br>
>which seems not ok to users who are using high resolution mac computer. <br>
>I was wondering if vtk developers will fix this issue in the nearest future.<br>
><br>
><br>
>By doing some web search, I know the reason is: In Hidpi (such as retina<br>
>resolution in macbook pro), 1x1 pixel becomes 2x2 pixels. Qt can<br>
>recognize it, so the widget size is right, but vtk can't, so<br>
>vtkRenderWindow only occupies a quarter of the widget size. I tried to<br>
>modify the source code of QVTKWidget class by doubling the size of<br>
>vtkRenderingWindow in the QVTKWidget, but it did't change anything. So<br>
>it's not so straightforward as I expected. Can anyone give me some<br>
>suggestion about how to fix the issue and what classes I need to modify?<br>
<br>
Can you try with this patch?<br>
<<a href="https://gitlab.kitware.com/vtk/vtk/merge_requests/1797">https://gitlab.kitware.com/vtk/vtk/merge_requests/1797</a>><br>
<br>
Cheers,<br>
<br>
-- <br>
____________________________________________________________<br>
Sean McBride, B. Eng sean@rogue-research.com<br>
Rogue Research <a href="http://www.rogue-research.com">www.rogue-research.com</a>
<br>
Mac Software Developer Montréal, Québec, Canada<br>
<br>
<br>
</div>
</span></font>
</body>
</html>