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window, image_view: Resize window based on image size

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Allows us to have a more appropriate size for the window
based on the content, instead of sticking with the small
default window size.
This commit is contained in:
Christopher Davis 2021-03-02 16:39:03 -08:00
parent f056c82ced
commit fef57b242d
2 changed files with 96 additions and 3 deletions
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46
src/window.rs
View file

@ -115,6 +115,12 @@ mod imp {
.connect_released(clone!(@weak obj => move |_, _, _, _| {
obj.pick_file();
}));
self.image_view.connect_dimensions_loaded(
clone!(@weak obj => move |_, width, height| {
obj.resize_from_dimensions(width, height);
}),
);
}
}
@ -243,11 +249,11 @@ impl IvWindow {
pub fn set_image_from_file(&self, file: &gio::File) {
let imp = imp::IvWindow::from_instance(self);
log::debug!("Loading file: {}", file.get_uri().to_string());
imp.image_view.set_image_from_file(file);
imp.stack.set_visible_child(&*imp.image_view);
log::debug!("Loading file: {}", file.get_uri().to_string());
if let Some(name) = file.get_basename() {
self.set_title(Some(
name.file_name().expect("Missing name").to_str().unwrap(),
@ -281,4 +287,40 @@ impl IvWindow {
.unwrap()
.set_enabled(enabled);
}
// Adapted from https://gitlab.gnome.org/GNOME/eog/-/blob/master/src/eog-window.c:eog_window_obtain_desired_size
pub fn resize_from_dimensions(&self, img_width: i32, img_height: i32) {
let imp = imp::IvWindow::from_instance(self);
let mut final_width = img_width;
let mut final_height = img_height;
let header_height = imp.headerbar.get_height();
// Ensure the window surface exists
if !self.get_realized() {
self.realize();
}
let display = gdk::Display::get_default().unwrap();
let monitor = display
.get_monitor_at_surface(&self.get_native().unwrap().get_surface().unwrap())
.unwrap();
let monitor_geometry = monitor.get_geometry();
let monitor_width = monitor_geometry.width;
let monitor_height = monitor_geometry.height;
if img_width > monitor_width || img_height + header_height > monitor_height {
let width_factor = (monitor_width as f32 * 0.85) / img_width as f32;
let height_factor =
(monitor_height as f32 * 0.85 - header_height as f32) / img_height as f32;
let factor = width_factor.min(height_factor);
final_width = (final_width as f32 * factor).round() as i32;
final_height = (final_height as f32 * factor).round() as i32;
}
self.set_default_size(final_width, final_height);
log::debug!("Window resized to {} x {}", final_width, final_height);
}
}