pub trait PrintOperationPreviewExt:
IsA<PrintOperationPreview>
+ Sealed
+ 'static {
// Provided methods
fn end_preview(&self) { ... }
fn is_selected(&self, page_nr: i32) -> bool { ... }
fn render_page(&self, page_nr: i32) { ... }
fn connect_got_page_size<F: Fn(&Self, &PrintContext, &PageSetup) + 'static>(
&self,
f: F,
) -> SignalHandlerId { ... }
fn connect_ready<F: Fn(&Self, &PrintContext) + 'static>(
&self,
f: F,
) -> SignalHandlerId { ... }
}
Expand description
Trait containing all PrintOperationPreview
methods.
§Implementors
Provided Methods§
sourcefn end_preview(&self)
fn end_preview(&self)
Ends a preview.
This function must be called to finish a custom print preview.
sourcefn is_selected(&self, page_nr: i32) -> bool
fn is_selected(&self, page_nr: i32) -> bool
sourcefn render_page(&self, page_nr: i32)
fn render_page(&self, page_nr: i32)
Renders a page to the preview.
This is using the print context that was passed to the
preview
handler together
with @self.
A custom print preview should use this function to render the currently selected page.
Note that this function requires a suitable cairo context to be associated with the print context.
§page_nr
the page to render
sourcefn connect_got_page_size<F: Fn(&Self, &PrintContext, &PageSetup) + 'static>(
&self,
f: F,
) -> SignalHandlerId
fn connect_got_page_size<F: Fn(&Self, &PrintContext, &PageSetup) + 'static>( &self, f: F, ) -> SignalHandlerId
Emitted once for each page that gets rendered to the preview.
A handler for this signal should update the @context
according to @page_setup and set up a suitable cairo
context, using PrintContext::set_cairo_context()
.
§context
the current PrintContext
§page_setup
the PageSetup
for the current page
sourcefn connect_ready<F: Fn(&Self, &PrintContext) + 'static>(
&self,
f: F,
) -> SignalHandlerId
fn connect_ready<F: Fn(&Self, &PrintContext) + 'static>( &self, f: F, ) -> SignalHandlerId
The ::ready signal gets emitted once per preview operation, before the first page is rendered.
A handler for this signal can be used for setup tasks.
§context
the current PrintContext