slint/internal/compiler/widgets/common/spinner-base.slint
Olivier Goffart b5aea0ed64
Spinner: simplify the arc path (#5420)
Since we use the stroke and stroke with, then a single arc is enough
instead of two connected by lines
2024-06-18 15:52:17 +02:00

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No EOL
1.8 KiB
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// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
export component SpinnerBase {
in property <float> progress;
in property <bool> indeterminate;
in property <length> stroke-width <=> path.stroke-width;
in property <brush> stroke <=> path.stroke;
path := Path {
private property <float> radius: min(self.viewbox-width, self.viewbox-height) / 2;
private property <float> start-x: self.viewbox-width / 2;
private property <float> start-y: self.viewbox-height / 2;
private property <float> start : !indeterminate ? 0 :
1 * mod(animation-tick(), 3s) / 3s;
// min is a workaround to get filled circle by 1.0
private property <float> progress: !root.indeterminate ? min(0.9999, root.progress) :
min(0.9999, max(0.20, 1 * abs(sin(360deg * animation-tick() / 1.5s))));
viewbox-width: 100;
viewbox-height: 100;
width: 100%;
height: 100%;
MoveTo {
x: start-x - radius * sin(-(path.start - 0.001) * 360deg);
y: start-y - radius * cos(-(path.start - 0.001) * 360deg);
}
// Workaround for femtovg not filling complete circle
LineTo {
x: start-x - radius * sin(-path.start * 360deg);
y: start-y - radius * cos(-path.start * 360deg);
}
ArcTo {
radius-x: path.radius;
radius-y: path.radius;
x: start-x - path.radius * sin(-(path.start + path.progress) * 360deg);
y: start-y - path.radius * cos(-(path.start + path.progress) * 360deg);
sweep: path.progress > 0;
large-arc: path.progress > 0.5;
}
}
}