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image/zoom: Force zoom to center for buttons

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Before, using buttons on touchscreen could zoom to the cursor position.
This commit is contained in:
Sophie Herold 2024-01-04 14:33:23 +01:00
parent 88099b1ec9
commit b1d1d547cf
6 changed files with 94 additions and 46 deletions
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2
src/widgets/image/input_handling.rs
View file

@ -85,7 +85,7 @@ impl imp::LpImage {
if animated {
obj.zoom_to(zoom);
} else {
obj.imp().zoom_to_full(zoom, false, false);
obj.imp().zoom_to_full(zoom, false, false, false);
}
// do not propagate event to scrolled window

72
src/widgets/image/zoom.rs
View file

@ -126,7 +126,8 @@ impl imp::LpImage {
(x, y)
}
/// Required adjustment to put image coordinate under the cursor at this zoom level
/// Required adjustment to put image coordinate under the cursor at this
/// zoom level
fn adj_for_position(
&self,
(cur_x, cur_y): (f64, f64),
@ -216,8 +217,14 @@ impl imp::LpImage {
}
}
pub(super) fn zoom_to_full(&self, mut zoom: f64, animated: bool, snap_best_fit: bool) {
let obj = self.obj();
pub(super) fn zoom_to_full(
&self,
mut zoom: f64,
animated: bool,
snap_best_fit: bool,
force_cursor_center: bool,
) {
let obj = self.obj().to_owned();
let max_zoom = self.max_zoom();
if zoom >= max_zoom {
@ -254,16 +261,26 @@ impl imp::LpImage {
}
if animated {
let animation: &adw::TimedAnimation = self.zoom_animation();
let animation = self.zoom_animation();
// Set new point in image that should remain under the cursor while zooming if
// there isn't one already
if self.zoom_cursor_target.get().is_none() {
let img_pos = self
.pointer_position
.get()
.map(|x| self.widget_to_img_coord(x));
self.zoom_cursor_target.set(img_pos);
if force_cursor_center {
animation.set_target(&adw::CallbackAnimationTarget::new(
glib::clone!(@weak obj => move |zoom| {
obj.imp().set_zoom_aiming(zoom, None);
}),
));
} else {
// Set new point in image that should remain under the cursor while zooming if
// there isn't one already
if self.zoom_cursor_target.get().is_none() {
let img_pos = self
.pointer_position
.get()
.map(|x| self.widget_to_img_coord(x));
self.zoom_cursor_target.set(img_pos);
}
animation.set_target(&adw::PropertyAnimationTarget::new(&obj, "zoom"));
}
animation.set_value_from(obj.zoom());
@ -283,7 +300,6 @@ impl imp::LpImage {
let animation = adw::TimedAnimation::builder()
.duration(ZOOM_ANIMATION_DURATION)
.widget(&*obj)
.target(&adw::PropertyAnimationTarget::new(&*obj, "zoom"))
.build();
animation.connect_done(glib::clone!(@weak obj => move |_| {
@ -300,20 +316,38 @@ impl imp::LpImage {
impl LpImage {
/// Zoom in a step with animation
///
/// Used by buttons
pub fn zoom_in(&self) {
/// Used by keyboard shortcuts
pub fn zoom_in_cursor(&self) {
let zoom = self.imp().zoom_target.get() * ZOOM_FACTOR_BUTTON;
self.zoom_to(zoom);
}
/// Zoom in a step with animation
///
/// Used by buttons
pub fn zoom_in_center(&self) {
let zoom = self.imp().zoom_target.get() * ZOOM_FACTOR_BUTTON;
self.imp().zoom_to_full(zoom, true, true, true);
}
/// Zoom out a step with animation
///
/// Used by keyboard shortcuts
pub fn zoom_out_cursor(&self) {
let zoom = self.imp().zoom_target.get() / ZOOM_FACTOR_BUTTON;
self.zoom_to(zoom);
}
/// Zoom out a step with animation
///
/// Used by buttons
pub fn zoom_out(&self) {
pub fn zoom_out_center(&self) {
let zoom = self.imp().zoom_target.get() / ZOOM_FACTOR_BUTTON;
self.zoom_to(zoom);
self.imp().zoom_to_full(zoom, true, true, true);
}
/// Zoom to best fit
@ -325,14 +359,14 @@ impl LpImage {
/// Zoom to specific level with animation
pub fn zoom_to(&self, zoom: f64) {
self.imp().zoom_to_full(zoom, true, true);
self.imp().zoom_to_full(zoom, true, true, false);
}
/// Zoom to specific level with animation not snapping to best-fit
///
/// Used for zooming to 100% or 200%
pub fn zoom_to_exact(&self, zoom: f64) {
self.imp().zoom_to_full(zoom, true, false);
self.imp().zoom_to_full(zoom, true, false, false);
}
pub fn is_best_fit(&self) -> bool {