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print: Code cleanup

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Part-of: <https://gitlab.gnome.org/GNOME/loupe/-/merge_requests/240>
This commit is contained in:
Sophie Herold 2023-07-29 18:29:09 +02:00 • committed by Christopher Davis
parent 2fac5e6c43
commit 172ce9d976
3 changed files with 48 additions and 39 deletions
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2
src/widgets/image_view.rs
View file

@ -700,7 +700,7 @@ impl LpImageView {
.downcast_ref::<gtk::Window>()
.context("Could not downcast to GtkWindow")?;
LpPrint::new(image, window.clone(), None, None).run();
LpPrint::new(image, window.clone(), None, None).run()?;
Ok(())
}

83
src/widgets/print.rs
View file

@ -55,7 +55,8 @@ enum VAlignment {
/// Scope guard for non user ui changes
///
/// Creates a context in which other signals know that changes are not user input
/// Creates a context in which other signals know that changes are not user input.
/// This avoids things like loops between value change signals.
#[derive(Default, Clone, Debug)]
struct UiUpdates {
disabled: Rc<Cell<bool>>,
@ -306,12 +307,10 @@ mod imp {
glib::clone!(@weak obj => move |_| obj.on_margin_unit_changed()),
);
self.margin_unit.set_expression(Some(Unit::expression()));
self.margin_horizontal.connect_value_notify(
glib::clone!(@weak obj => move |_| obj.on_margin_horizontal_changed()),
);
self.margin_vertical.connect_value_notify(
glib::clone!(@weak obj => move |_| obj.on_margin_vertical_changed()),
);
self.margin_horizontal
.connect_value_notify(glib::clone!(@weak obj => move |_| obj.on_margin_changed()));
self.margin_vertical
.connect_value_notify(glib::clone!(@weak obj => move |_| obj.on_margin_changed()));
// Size signals
self.size_unit.connect_selected_notify(
@ -390,7 +389,7 @@ mod imp {
};
obj.set_orientation(orientation);
obj.set_visible(true);
obj.present();
}
));
}
@ -458,10 +457,25 @@ impl LpPrint {
obj
}
/// Starts print preparation process by showing the print dialog
pub fn run(&self) -> Result<(), glib::Error> {
self.print_operation()
.run(
gtk::PrintOperationAction::PrintDialog,
self.imp().parent_window.get(),
)
.map(|_| ())
}
/// Returns if the current update is caused by user input
///
/// If ui input is changed via code, this is set to `false`
/// via `disable_ui_updates` before.
fn ui_updates(&self) -> bool {
!self.imp().ui_updates.disabled.get()
}
/// Creates scope guard that allows ui changes via code afterwards
fn disable_ui_updates(&self) -> UiUpdates {
self.imp().ui_updates.disable()
}
@ -536,6 +550,7 @@ impl LpPrint {
f64::max(1., self.imp().width.value() / self.width_unit_factor())
}
/// Returns user selected image height in pixels
pub fn user_height(&self) -> f64 {
let (_, orig_height) = self.image().image_size();
@ -549,7 +564,7 @@ impl LpPrint {
self.user_width() / orig_width as f64
}
pub fn on_margin_horizontal_changed(&self) {
pub fn on_margin_changed(&self) {
if self.ui_updates() {
let _ui_updates_disabled = self.disable_ui_updates();
self.set_ranges();
@ -566,6 +581,7 @@ impl LpPrint {
self.imp().margin_horizontal.value() / self.margin_unit_factor()
}
/// Returns left margin that positions the image according to user settings
pub fn effective_margin_left(&self) -> f64 {
match self.user_alignment().horizontal {
HAlignment::Left => self.user_margin_horizontal(),
@ -576,27 +592,16 @@ impl LpPrint {
}
}
/// Returns width of physical paper in pixels
pub fn paper_width(&self) -> f64 {
self.page_setup().paper_width(gtk::Unit::Inch) * self.dpi()
}
/// Returns height of physical paper in pixels
pub fn paper_height(&self) -> f64 {
self.page_setup().paper_height(gtk::Unit::Inch) * self.dpi()
}
pub fn on_margin_vertical_changed(&self) {
if self.ui_updates() {
let _ui_updates_disabled = self.disable_ui_updates();
self.set_ranges();
if self.fill_space() {
let _ui_updates_disabled = self.disable_ui_updates();
self.update_width();
self.update_height();
}
self.draw_preview();
}
}
/// Returns user selected top margin in pixels
pub fn user_margin_vertical(&self) -> f64 {
self.imp().margin_vertical.value() / self.margin_unit_factor()
@ -654,6 +659,7 @@ impl LpPrint {
);
}
/// Returns width that makes the image fill the page
fn fill_space_width(&self) -> f64 {
let width1 = self.paper_width() - 2. * self.user_margin_horizontal();
@ -664,12 +670,14 @@ impl LpPrint {
f64::min(width1, width2)
}
/// Returns height that makes the image fill the page
fn fill_space_height(&self) -> f64 {
let (orig_width, orig_height) = self.image().image_size();
self.fill_space_width() * orig_height as f64 / orig_width as f64
}
/// Updates width according to margins if fill space is activated
fn update_width(&self) {
if self.fill_space() {
let value = self
@ -679,6 +687,7 @@ impl LpPrint {
}
}
/// Updates height according to width
fn update_height(&self) {
let height = if self.fill_space() {
self.fill_space_height()
@ -741,6 +750,7 @@ impl LpPrint {
self.draw_preview();
}
/// Returns if the option to fill the page with the image is activated
pub fn fill_space(&self) -> bool {
self.imp().fill_space.is_active()
}
@ -754,15 +764,6 @@ impl LpPrint {
}
}
pub fn run(&self) {
self.print_operation()
.run(
gtk::PrintOperationAction::PrintDialog,
self.imp().parent_window.get(),
)
.unwrap();
}
pub fn page_setup(&self) -> gtk::PageSetup {
self.print_operation().default_page_setup()
}
@ -776,7 +777,11 @@ impl LpPrint {
self.print_operation().print_settings(),
Some(self.print_operation().default_page_setup()),
);
print.run();
let res = print.run();
if let Err(err) = res {
log::warn!("Print dialog error: {err}");
}
}
/// Initialize actual print operation
@ -806,12 +811,14 @@ impl LpPrint {
}),
);
print_operation
.run(
gtk::PrintOperationAction::Print,
Some(&self.parent_window()),
)
.unwrap();
let res = print_operation.run(
gtk::PrintOperationAction::Print,
Some(&self.parent_window()),
);
if let Err(err) = res {
log::warn!("Print error: {err}");
}
}
/// Draw PDF for printing