printing pdf

[biancashouse]

Dave, your sample works.
My pdf generates into a file ok, but when I try the print option, the preview is blank and I get these error messages: (only tried on the iphone X simulator)

flutter: Print ...
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(
"<NSLayoutConstraint:0x604000290db0 UIView:0x7ff052f6dbe0.width == UILabel:0x7ff052f735a0'Page 1'.width + 28 (active)>",
"<NSLayoutConstraint:0x604000291ad0 H:[UIImageView:0x7ff052f73880]-(3)-UILabel:0x7ff052f735a0'Page 1' (active)>",
"<NSLayoutConstraint:0x604000288980 UIImageView:0x7ff052f73880.width == 22 (active)>",
"<NSLayoutConstraint:0x60400028b720 H:|-(0)-UIImageView:0x7ff052f73880 (active, names: '|':UIView:0x7ff052f6dbe0 )>",
"<NSLayoutConstraint:0x604000285140 UILabel:0x7ff052f735a0'Page 1'.right == UIView:0x7ff052f6dbe0.right (active)>"
)

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x604000291ad0 H:[UIImageView:0x7ff052f73880]-(3)-UILabel:0x7ff052f735a0'Page 1' (active)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

[DavBfr]

That should be fixed with version 1.3.2

[biancashouse]

Yep, looking good. On iOS it was generating the print preview just the once, then blank. This new version does fix that. Thanks. Ian

…

On Thu, Feb 7, 2019 at 12:01 AM David PHAM-VAN ***@***.***> wrote: Closed #32 <#32>. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#32 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AArVxCAJFSZ8C6oTpM27naRL_devvvVvks5vKtINgaJpZM4akgU4> .

[biancashouse]

Dave, I have developed a 'flowcharter for coders' app. My app lets users pick US Letter, A4 or A3 for their flowchart, and the print preview should reflect that.The onLayout method expects a page size argument (format), but as far as I can see US Letter is always used. How do I pass in the page size to the printPdf function ? I see you are in the middle of implementing a pdf widgets approach. That'll be really nice. Cheers Ian

…

On Thu, Feb 7, 2019 at 1:01 AM Ian White ***@***.***> wrote: Yep, looking good. On iOS it was generating the print preview just the once, then blank. This new version does fix that. Thanks. Ian On Thu, Feb 7, 2019 at 12:01 AM David PHAM-VAN ***@***.***> wrote: > Closed #32 <#32>. > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub > <#32 (comment)>, or mute > the thread > <https://github.com/notifications/unsubscribe-auth/AArVxCAJFSZ8C6oTpM27naRL_devvvVvks5vKtINgaJpZM4akgU4> > . >

[DavBfr]

The onLayout function gives you a page format and margins related to what the selected printer can do. So it's your app to adapt and create a pdf document with the right size and margins.
The widget system helps a lot di achieve that. It is ready now in version 1.3.x.

[biancashouse]

You probably already realise this, but IMHO having a drawstring where you can provide a max width and get auto wrapping would be the most useful new pdf widget ;-) In eager anticipation...

…

On Thu, Feb 7, 2019 at 10:40 AM Ian White ***@***.***> wrote: Dave, I have developed a 'flowcharter for coders' app. My app lets users pick US Letter, A4 or A3 for their flowchart, and the print preview should reflect that.The onLayout method expects a page size argument (format), but as far as I can see US Letter is always used. How do I pass in the page size to the printPdf function ? I see you are in the middle of implementing a pdf widgets approach. That'll be really nice. Cheers Ian On Thu, Feb 7, 2019 at 1:01 AM Ian White ***@***.***> wrote: > Yep, looking good. > On iOS it was generating the print preview just the once, then blank. > This new version does fix that. > Thanks. > > Ian > > On Thu, Feb 7, 2019 at 12:01 AM David PHAM-VAN ***@***.***> > wrote: > >> Closed #32 <#32>. >> >> — >> You are receiving this because you authored the thread. >> Reply to this email directly, view it on GitHub >> <#32 (comment)>, or mute >> the thread >> <https://github.com/notifications/unsubscribe-auth/AArVxCAJFSZ8C6oTpM27naRL_devvvVvks5vKtINgaJpZM4akgU4> >> . >> >