DCHTMLVIEWER

[Andy Edward]

Hi Roger,

I tried using your sample in \exp19258\Samples\Activex\Webbrow.exe to run the attached html file.

It is a page with some charts done using highcharts and I'm seeing occasional crashes and hangs. Sometimes the sample will just quit by itself.

Please click around the first chart and run again the program once or twice to see the problem.

Do you think this is a problem from xbase itself?

Am I right to say that DCHTMLVIEWER is basically calling Internet Explorer instance?

chart.zip

(1.73 KiB) Downloaded 622 times

Andy

[rdonnay]

Andy -

Yes, you are right that DCHTMLVIEWER uses Internet Explorer.
It is using the XbpHtmlViewer() class.

I haven't used it very much with Javascript, so I don't know how the IE ActiveX control behaves under those conditions.

I ran your Javascript under FoxFire and it seems ok, however I don't know what conditions would make it lock up.

The below links from your HTML suggest that this HTML is not being sent from your own server. Am I right?

I have used Jquery in the past and had problems when I had to load the Javascript from another place on the web. If you have a slow link to the source, it will hang. I made sure that the *.js files were always on my server. Also, I see that you are using Ajax. I have no experience with this but I suspect that it is the source of your hangups because it is always polling the server.

Do you get the sames results when you open IE and run your HTML from it?

Code: Select all

  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
  <script src="http://code.highcharts.com/highcharts.js"></script>

Roger

[Andy Edward]

Hi Roger,

You raised an interesting point on the javascript being on remote location instead of the local server. I've downloaded all the necessary javascript in my local server, but the occasional hangs still occur. It's like that the XbpHtmlViewer() is unable to process the chart's animation. Please take a look at my screenshots. The columns in 'untitled-1.jpg' should go all the way up until below the percentage text, but it stuck there and hangs the webbrow.exe

The animation hangs halfway

Untitled-1.jpg (45.86 KiB) Viewed 12261 times

How it should look like:

This is how it should look like

Untitled-2.jpg (46.15 KiB) Viewed 12261 times

When I open my IE (IE 10, Windows 7 Ultimate 32 bit), the charts are fine. That's what boggles me, if XbpHtmlViewer() opens up an IE instance, I don't see why it should crash.

Is it possible that even if I have IE 10, XbpHtmlViewer() opens up another version of IE?

Best Regards,

Andy

[rdonnay]

Is it possible that even if I have IE 10, XbpHtmlViewer() opens up another version of IE?

I don't think so.
It opens the ActiveX control that is registered on your computer.
If you have IE 10, then that should be the only one registered.

It could be that some Javascript doesn't run well from an ActiveX instance.

[Auge_Ohr]

Am I right to say that DCHTMLVIEWER is basically calling Internet Explorer instance?

as i can say Alaska use WebBrowser Object from IFRAME.DLL
http://msdn.microsoft.com/en-us/library ... 85%29.aspx
with there Demo c:\ALASKA\XPPW32\Source\samples\activex\webbrowser\webbrowser.exe which i use to test your Chart.HTML

i did try to run your Sample on Windows v8.1 with IE11 and fail at Line 12 ... hm ... perhaps no Java Script Runtime ...

inside your Code i saw

Code: Select all

name: 'MSIE versions',
categories: ['MSIE 6.0', 'MSIE 7.0', 'MSIE 8.0', 'MSIE 9.0'],

but you say you are using IE10 ?

so i try it on a XP PC with IE8 and all work fine when click on Chart to change.
as i remember IE Security have change since Vista and i got more timing Problem using Xbase++ activeX.

[Andy Edward]

Hi Jimmy,

inside your Code i saw

Code: Select all

name: 'MSIE versions',
categories: ['MSIE 6.0', 'MSIE 7.0', 'MSIE 8.0', 'MSIE 9.0'],

but you say you are using IE10 ?

The categories array, is just a collection of strings that will make up the chart. It's a demo datafrom the highchart website.

so i try it on a XP PC with IE8 and all work fine when click on Chart to change.
as i remember IE Security have change since Vista and i got more timing Problem using Xbase++ activeX.

Yes, when I'm using a normal browser (IE, Opera, Firefox, Chrome) the charts work perfectly.

It seems like I'm stuck with basic charts if I'm using ActiveX

[Auge_Ohr]

It seems like I'm stuck with basic charts if I'm using ActiveX

as i say activeX is limited to WebBrowser Object from IFRAME.DLL but there are more inside.

did you try Xbase++ v2.x CTP ?
it does include CXP using a HMTLlayout API Engine to render HTML !

[rdonnay]

did you try Xbase++ v2.x CTP ?
it does include CXP using a HMTLlayout API Engine to render HTML !

It doesn't support Javascript or HTML 5.

[Auge_Ohr]

It doesn't support Javascript or HTML 5.

HTML5 ... don't know if HTMLlayout Engine can render it.
JavaScript is IMHO to modify HTML which is as a Document Object Model (DOM) in the browser.

when we speak about using HTML as Xbase++ Form we will switch from "native" Windows Control to HTML Style Control.
but you need to render HTML Content, this is what HTMLlayout Engine is doing.

with Xbase++ activeX and ot4xb you can build a connection to HTMLlayout Engine and show "Hello world"
i have a dream : XppFd.EXE will create HTML Code.

[Auge_Ohr]

Yes, when I'm using a normal browser (IE, Opera, Firefox, Chrome) the charts work perfectly.

i mean other Xbase++ Solution :
c:\ALASKA\XPPW32\Source\samples\activex\webbrowser\webbrowser.exe
on Win 7 / 8.x with IE > 8