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zooming: Add a control widget that allows for changing the zoom level of the graph

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The new widget sits in the headerbar, and allows for changing the zoom level with "+" and "-" buttons, via text entry, and a dropdown where a list of predefined levels can be clicked.
This commit is contained in:
Tom A. Wagner
2022-11-09 16:27:58 +01:00
committed by Tom Wagner
parent 56e73d33c9
commit 727326aca4
4 changed files with 223 additions and 0 deletions
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16
src/application.rs
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@@ -56,6 +56,10 @@ mod imp {
let scrollwindow = gtk::ScrolledWindow::builder()
.child(&self.graphview)
.build();
let headerbar = gtk::HeaderBar::new();
let zoomentry = view::ZoomEntry::new(&self.graphview);
headerbar.pack_end(&zoomentry);
let window = gtk::ApplicationWindow::builder()
.application(app)
.default_width(1280)
@@ -66,6 +70,18 @@ mod imp {
window
.settings()
.set_gtk_application_prefer_dark_theme(true);
window.set_titlebar(Some(&headerbar));
let zoom_set_action =
gio::SimpleAction::new("set-zoom", Some(&f64::static_variant_type()));
zoom_set_action.connect_activate(
clone!(@weak self.graphview as graphview => move|_, param| {
let zoom_factor = param.unwrap().get::<f64>().unwrap();
graphview.set_zoom_factor(zoom_factor)
}),
);
window.add_action(&zoom_set_action);
window.show();
}