Internet Printing (ReadyState always 4)
Started by tempt632 at 06-19-2008 10:22. Topic has 3 replies.
|
|
 06-19-2008, 10:22
|
tempt632
Joined on 10-16-2006
Posts 16
|
Internet Printing (ReadyState always 4)
|
  
|
|
|
When trying to print images using the ActiveX control, I keep getting the following error when the Render method is called: "ltocx14n: LEAD Error: Invalid bitmap handle". If i examine the bitmap property at this point it is zero. However, if i continue past the exception, the image will show up in the lead control.
The code at this point looks like this:
Lead.BitmapDataPath = "image.aspx";
var HDC = Lead.PrintStart();
Lead.Render(HDC, 0, 0, 0, 0); //exception being thrown here
Lead.PrintEnd(HDC);
I have discovered that if i inject something such as an alert dialog, and once the dialog is dismissed, the bitmap property is non-zero and the render method will succeed and execution will continue.
The code after causing a delay:
Lead.BitmapDataPath = "image.aspx";
alert("Let the image finish loading!"); //alert allows the image to finish loading
var HDC = Lead.PrintStart();
Lead.Render(HDC, 0, 0, 0, 0); //exception being thrown here
Lead.PrintEnd(HDC);
I have read the documentation and the documentation indicated that the ReadyState property should be examined to determine if an image is still being loaded or not. However, the value of the ReadyState is always 4 and cannot be modiifed as it is a read only property.
Is there another method to tell when an image has finished loading or is still in the process of loading?
Using LeadTools 14.5
^^
JAVD
|
|
|
|
|
Report
|
|
|
|
|
06-20-2008, 18:01
|
Walter
 
Joined on 04-14-2008
Charlotte, NC
Posts 112
|
Re: Internet Printing (ReadyState always 4)
|
|
|
|
|
|
I'd suggest looking at the ReadyStateChange event if you have not already done so. You'll want to set the BitmapDataPath and then wait for this event to fire. Once the event fires, you can then check to see that the ReadyState is equal to "READYSTATE_COMPLETE". There are examples in the documentation on using this event.
Walter
Technical Support
LEADTOOLS
support@leadtools.com
|
|
|
|
|
Report
|
|
|
|
|
06-24-2008, 10:36
|
tempt632
Joined on 10-16-2006
Posts 16
|
Re: Internet Printing (ReadyState always 4)
|
|
|
|
|
|
Looking through the examples folder, i do not see any use of the ReadyState event or use of the ReadyState property in the context of the ActiveX control
Further, the lead object does not even have a method ( accessing the ActiveX control via javascript) or property representing the ReadyStateChange event.
Could you provide a short example ( or point to a specific example ) of how tap into this event through javascript?
Using LeadTools 14.5
^^
JAVD
|
|
|
|
|
Report
|
|
|
|
|
06-26-2008, 12:57
|
Walter
Joined on 04-14-2008
Charlotte, NC
Posts 112
|
|
|
|
I have attached a short example of how to use the ReadyStateChange event in Javascript.
Walter
Technical Support
LEADTOOLS
support@leadtools.com
|
|
|
|
|
Report
|
|
|
|
|
LEAD Support Fo... » Developer » Internet » Internet Printing (ReadyState always 4)
|
|
Copyright LEAD Technologies, Inc. 2008
