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Fix Shift+drag start behavior for iced and vizia

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The previous calculation was incorrect as it would cause the value to
jump a bit.
This commit is contained in:
Robbert van der Helm
2022-03-19 02:18:30 +01:00
parent 92908e0232
commit 2e18ae0ebc
2 changed files with 36 additions and 25 deletions
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28
nih_plug_iced/src/widgets/param_slider.rs
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@@ -48,9 +48,9 @@ pub struct State {
/// Will be set to `true` if we're dragging the parameter. Resetting the parameter or entering a
/// text value should not initiate a drag.
drag_active: bool,
/// We keep track of the start coordinate holding down Shift while dragging for higher precision
/// dragging. This is a `None` value when granular dragging is not active.
granular_drag_start_x: Option<f32>,
/// We keep track of the start coordinate and normalized value holding down Shift while dragging
/// for higher precision dragging. This is a `None` value when granular dragging is not active.
granular_drag_start_x_value: Option<(f32, f32)>,
/// Track clicks for double clicks.
last_click: Option<mouse::Click>,
@@ -332,8 +332,8 @@ impl<'a, P: Param> Widget<ParamMessage, Renderer> for ParamSlider<'a, P> {
// When holding down shift while clicking on a parameter we want to
// granuarly edit the parameter without jumping to a new value
self.state.granular_drag_start_x =
Some(util::remap_rect_x_t(&bounds, self.param.normalized_value()));
self.state.granular_drag_start_x_value =
Some((cursor_position.x, self.param.normalized_value()));
} else {
shell.publish(ParamMessage::BeginSetParameter(self.param.as_ptr()));
self.state.drag_active = true;
@@ -342,7 +342,7 @@ impl<'a, P: Param> Widget<ParamMessage, Renderer> for ParamSlider<'a, P> {
shell,
util::remap_rect_x_coordinate(&bounds, cursor_position.x),
);
self.state.granular_drag_start_x = None;
self.state.granular_drag_start_x_value = None;
}
return event::Status::Captured;
@@ -365,21 +365,23 @@ impl<'a, P: Param> Widget<ParamMessage, Renderer> for ParamSlider<'a, P> {
// If shift is being held then the drag should be more granular instead of
// absolute
if self.state.keyboard_modifiers.shift() {
let drag_start_x = *self
let (drag_start_x, drag_start_value) = *self
.state
.granular_drag_start_x
.get_or_insert(cursor_position.x);
.granular_drag_start_x_value
.get_or_insert_with(|| {
(cursor_position.x, self.param.normalized_value())
});
self.set_normalized_value(
shell,
util::remap_rect_x_coordinate(
&bounds,
drag_start_x
util::remap_rect_x_t(&bounds, drag_start_value)
+ (cursor_position.x - drag_start_x) * GRANULAR_DRAG_MULTIPLIER,
),
);
} else {
self.state.granular_drag_start_x = None;
self.state.granular_drag_start_x_value = None;
self.set_normalized_value(
shell,
@@ -396,10 +398,10 @@ impl<'a, P: Param> Widget<ParamMessage, Renderer> for ParamSlider<'a, P> {
// If this happens while dragging, snap back to reality uh I mean the current screen
// position
if self.state.drag_active
&& self.state.granular_drag_start_x.is_some()
&& self.state.granular_drag_start_x_value.is_some()
&& !modifiers.shift()
{
self.state.granular_drag_start_x = None;
self.state.granular_drag_start_x_value = None;
self.set_normalized_value(
shell,