How to Modify the print button action ! to directly print as pdf

Hello ^-^.

I have an issue, but do not know how to solve ..

if anyone knows how to modify that setting or scripting, please share your idea ^^

here's my question.

all you know the birt webviewer and it has toolbar, there is a button to print as html and pdf format.

first,

if print as html for landscape layout, I should change or set the print options manually, I think ...(it's the only way to print, I know) - Do you know how to set printer options as landscape when print as html in landscape layout ?


second ,

the problem in the first question, it's nothing matter in pdf format....
So my client wants to change the action of print button, as when user click the button, do not show the report print dialog layout, just only action ... print as pdf..

in my opinion, there is a way to call the function or process to print as pdf ..
but I cannot find ..it ..out ...

Please help me !!!!

thanks for reading ..^-^