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feat: allow scaling arrows #38

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Merged
merged 1 commit into from
Jul 5, 2024
Merged

feat: allow scaling arrows #38

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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
## 3.1.0

- Add an optional `scale` parameter to arrows (default is `scale: 1.0`, matching the previous behavior).

## 3.0.0

Improve board interaction and add support for drawing shapes while playing.
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5 changes: 5 additions & 0 deletions lib/src/models.dart
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Expand Up @@ -405,11 +405,16 @@ class Arrow implements Shape {
final Color color;
final SquareId orig;
final SquareId dest;
/// Width of the arrow and size of its tip will be scaled by this factor.
///
/// If 1.0, the width will be 1/4th of the square size.
final double scale;

const Arrow({
required this.color,
required this.orig,
required this.dest,
this.scale = 1.0,
});

@override
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10 changes: 7 additions & 3 deletions lib/src/widgets/shape.dart
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Expand Up @@ -25,6 +25,7 @@ class ShapeWidget extends StatelessWidget {
color: final color,
orig: final orig,
dest: final dest,
scale: final scale,
) =>
SizedBox.square(
dimension: boardSize,
Expand All @@ -34,6 +35,7 @@ class ShapeWidget extends StatelessWidget {
orientation,
Coord.fromSquareId(orig),
Coord.fromSquareId(dest),
scale,
),
),
),
Expand Down Expand Up @@ -62,17 +64,19 @@ class ShapeWidget extends StatelessWidget {
}

class _ArrowPainter extends CustomPainter {
_ArrowPainter(this.color, this.orientation, this.fromCoord, this.toCoord);
_ArrowPainter(
this.color, this.orientation, this.fromCoord, this.toCoord, this.scale);

final Color color;
final Side orientation;
final Coord fromCoord;
final Coord toCoord;
final double scale;

@override
void paint(Canvas canvas, Size size) {
final squareSize = size.width / 8;
final lineWidth = squareSize / 4;
final lineWidth = scale * squareSize / 4;
final paint = Paint()
..strokeWidth = lineWidth
..color = color
Expand All @@ -87,7 +91,7 @@ class _ArrowPainter extends CustomPainter {
math.atan2(toOffset.dy - fromOffset.dy, toOffset.dx - fromOffset.dx);
final fromMarginOffset =
Offset(margin * math.cos(angle), margin * math.sin(angle));
final arrowSize = squareSize * 0.48;
final arrowSize = scale * squareSize * 0.48;
const arrowAngle = math.pi / 5;

final from = fromOffset + shift + fromMarginOffset;
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2 changes: 1 addition & 1 deletion pubspec.yaml
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@@ -1,6 +1,6 @@
name: chessground
description: Chess board UI developed for lichess.org. It has no chess logic inside so it can be used for chess variants.
version: 3.0.0
version: 3.1.0
repository: https://github.com/lichess-org/flutter-chessground
funding:
- https://lichess.org/patron
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