HTMLView to BlitzMax Communication

BlitzMax Forums/BlitzMax Programming/HTMLView to BlitzMax Communication

CASO	(Posted 2010) [#1]

I have found out that HTMLViewRun can be used to send information to the HTML, yet there doesn't seem to be any way to send information back.

Is there a way to send information from an HTML page in an HTMLView gadget to the parent program?

I am writing the program and the HTML pages that are involved, so is there any javascript code the page can call to send a request or event to the parent program?

zambani

(Posted 2010) [#2]

This may not be the best way to do it but it works for strings of data coming from the browsers

SuperStrict
Import maxgui.drivers

Global mainWindow:TGadget = CreateWindow("myWindow", 100, 100, 1024, 768, Null, WINDOW_TITLEBAR | WINDOW_RESIZABLE)
Global html:TGadget = CreateHTMLView(0, 0, 1024, 768, mainWindow, HTMLVIEW_NONAVIGATE)
HtmlViewGo(html, "Jupiter_moon.htm")

Repeat
	WaitEvent
	Select EventID()
	Case EVENT_GADGETACTION
		If EventSource() = html
			Print EventText()		'this will be the link that was sent by your JS code
		End If
	Case EVENT_WINDOWCLOSE
		Exit
	End Select
Forever

For the HTML do this

<script>
function returnData(d)
{
var lo = document.getElementById('dlink');
lo.href=d;
lo.click();
}
</script>


<body>
<a id="dlink" href=""></a>
</body>

the dlink anchor is used to send the link data to your code via eventtext.

Works in IE not sure if the JS will work in other browsers.

CASO	(Posted 2010) [#3]

This is still rough, but I think this is the route I will take

Strict 
Import maxgui.drivers

Global window:TGadget=CreateWindow("My Window",30,20,600,440,,15|WINDOW_ACCEPTFILES)
Global htmlview:TGadget=CreateHTMLView(0,0,ClientWidth(window),ClientHeight(window),window,HTMLVIEW_NONAVIGATE)
SetGadgetLayout(htmlview,1,1,1,1) 
HtmlViewGo(htmlview,"Test.html")

While WaitEvent()
	Select EventID()
		Case EVENT_GADGETACTION
			Print processMsg(EventText())			
		Case EVENT_WINDOWCLOSE
			End
	End Select
Wend

Function processMsg:String(msg:String)
	msg=Right(msg,Len(msg)-4)
	For Local i:Int=32 To 255
		Print "%"+Right(Hex$(i),2)
		msg=Replace(msg,"%"+Right(Hex$(i),2),Chr(i))
	Next
	Return msg
EndFunction

Test.html

<html>
<head>
<SCRIPT LANGUAGE="JavaScript">
function Jump()
{
	var param2=1
	window.location.href = "msg:toBeParsed('One',"+param2+")";
}
</script>
</head>
<body>
<a href="msg:Just Some Text">Click Here<a>
</body>
</html>

zambani

(Posted 2010) [#4]

is clicking on the link by a user required? if so you may want to have javascript send a click event to that link so your program can initiate the data transfer without user intervention.
You also want to check to make sure that the object that fired the gadgetaction is in fact your htmlview.

CASO	(Posted 2010) [#5]

Thank you for reminding me to check for that. It appear that javascript navigation is handled the same as a user clicking a link.