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Center pdf page in window

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This commit is contained in:
Julian Mutter 2023-09-29 17:56:48 +02:00
parent 19b1ccfcbf
commit 1f33d09ec1
1 changed files with 11 additions and 1 deletions
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12
src/main.rs
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@ -131,20 +131,30 @@ fn build_ui(app: &Application, arguments: Vec<OsString>) {
let page = doc.get_page(**current_page_number - 1).unwrap(); let page = doc.get_page(**current_page_number - 1).unwrap();
let (w, h) = page.get_size(); let (w, h) = page.get_size();
let width_diff = area.width() as f64 / w; let width_diff = area.width() as f64 / w;
let height_diff = area.height() as f64 / h; let height_diff = area.height() as f64 / h;
context.save().unwrap(); context.save().unwrap();
if width_diff > height_diff { if width_diff > height_diff {
context.translate(
(area.width() as f64 - w * height_diff) / 2.0,
(area.height() as f64 - h * height_diff) / 2.0,
);
context.scale(height_diff, height_diff); context.scale(height_diff, height_diff);
} else { } else {
context.translate(
(area.width() as f64 - w * width_diff) / 2.0,
(area.height() as f64 - h * width_diff) / 2.0,
);
context.scale(width_diff, width_diff); context.scale(width_diff, width_diff);
} }
page.render(&context); page.render(&context);
let r = ctx.paint(); let r = ctx.paint();
match r { match r {
Err(v) => println!("Error painting PDF: {v:?}"), Err(v) => println!("Error painting PDF: {v:?}"),
Ok(_v) => println!(""), Ok(_v) => {}
} }
ctx.show_page().unwrap(); ctx.show_page().unwrap();