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metadata: Centralize many loose ends

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This commit is contained in:
Sophie Herold 2024-01-01 22:41:56 +01:00
parent b6d578cc0a
commit fe43bc3a4c
21 changed files with 179 additions and 195 deletions
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51
src/widgets/image/input_handling.rs
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@ -1,4 +1,4 @@
// Copyright (c) 2023 Sophie Herold
// Copyright (c) 2023-2024 Sophie Herold
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
@ -45,41 +45,48 @@ impl imp::LpImage {
gtk::EventControllerScroll::new(gtk::EventControllerScrollFlags::VERTICAL);
scroll_controller.connect_scroll(glib::clone!(@weak obj => @default-return glib::Propagation::Proceed, move |event, _, y| {
// use Ctrl key as modifier for vertical scrolling
if event.current_event_state().contains(gdk::ModifierType::CONTROL_MASK)
|| event.current_event_state().contains(gdk::ModifierType::SHIFT_MASK)
{
// propagate event to scrolled window
return glib::Propagation::Proceed;
}
let state = event.current_event_state();
// touchpads do zoom via gestures only
if event.current_event_device().map(|x| x.source())
== Some(gdk::InputSource::Touchpad)
if event.current_event_device().map(|x| x.source()) == Some(gdk::InputSource::Touchpad)
{
// propagate event to scrolled window
return glib::Propagation::Proceed;
// Touchpads do zoom via gestures, expect when Ctrl key is pressed
if !state.contains(gdk::ModifierType::CONTROL_MASK) {
// propagate event to scrolled window
return glib::Propagation::Proceed;
}
} else {
// use Ctrl key as modifier for vertical scrolling
if state.contains(gdk::ModifierType::CONTROL_MASK)
|| state.contains(gdk::ModifierType::SHIFT_MASK)
{
// propagate event to scrolled window
return glib::Propagation::Proceed;
}
}
// Use exponential scaling since zoom is always multiplicative with the existing value
// This is the right thing since `exp(n/2)^2 == exp(n)` (two small steps are the same as one larger step)
let (zoom_factor, animated) = match event.unit() {
gdk::ScrollUnit::Wheel => (f64::exp( - y * f64::ln(ZOOM_FACTOR_SCROLL_WHEEL)), y.abs() >= 1.),
gdk::ScrollUnit::Surface => (f64::exp( - y * f64::ln(ZOOM_FACTOR_SCROLL_SURFACE)), false),
gdk::ScrollUnit::Wheel => (
f64::exp(-y * f64::ln(ZOOM_FACTOR_SCROLL_WHEEL)),
y.abs() >= 1.,
),
gdk::ScrollUnit::Surface => {
(f64::exp(-y * f64::ln(ZOOM_FACTOR_SCROLL_SURFACE)), false)
}
unknown_unit => {
log::warn!("Ignoring unknown scroll unit: {unknown_unit}");
(1., false)
}
};
let zoom =
obj.imp().zoom_target.get() * zoom_factor;
let zoom = obj.imp().zoom_target.get() * zoom_factor;
if animated {
obj.zoom_to(zoom);
} else {
obj.imp().zoom_to_full(zoom, false, false);
}
if animated {
obj.zoom_to(zoom);
} else {
obj.imp().zoom_to_full(zoom, false, false);
}
// do not propagate event to scrolled window
glib::Propagation::Stop