Feat/tooltip position

lib/src/pie_canvas_core.dart

@@ -12,7 +12,7 @@ import 'package:pie_menu/src/pie_menu.dart';
 import 'package:pie_menu/src/pie_provider.dart';
 import 'package:pie_menu/src/pie_theme.dart';
 import 'package:pie_menu/src/platform/base.dart';
-import 'package:vector_math/vector_math.dart' hide Colors;
+import 'package:vector_math/vector_math.dart' hide Colors, Matrix4;
 
 /// Controls functionality and appearance of [PieCanvas].
 class PieCanvasCore extends StatefulWidget {
@@ -391,6 +391,27 @@ class PieCanvasCoreState extends State<PieCanvasCore>
                       }
 
                       if (tooltipAlignment != null) {
+                        // If the tooltip is centered, use a Flow widget to
+                        // position it relative to the pointer.
+                        if (tooltipAlignment == Alignment.center) {
+                          return Flow(
+                            delegate: PieDelegate(
+                              bounceAnimation: _buttonBounceAnimation,
+                              pointerOffset: _pointerOffset,
+                              canvasOffset: _canvasOffset,
+                              baseAngle: _baseAngle,
+                              angleDiff: _angleDiff,
+                              theme: _theme,
+                              constraints: BoxConstraints(
+                                minWidth: 0,
+                                maxWidth: cw,
+                                minHeight: 0,
+                                maxHeight: ch,
+                              ),
+                            ),
+                            children: [child],
+                          );
+                        }
                         return Align(
                           alignment: tooltipAlignment,
                           child: child,

lib/src/pie_delegate.dart

@@ -16,7 +16,9 @@ class PieDelegate extends FlowDelegate {
     required this.baseAngle,
     required this.angleDiff,
     required this.theme,
-  }) : super(repaint: bounceAnimation);
+    BoxConstraints? constraints,
+  })  : _constraints = constraints,
+        super(repaint: bounceAnimation);
 
   /// Bouncing animation for the buttons.
   final Animation bounceAnimation;
@@ -36,6 +38,11 @@ class PieDelegate extends FlowDelegate {
   /// Theme to use for the [PieMenu].
   final PieTheme theme;
 
+  /// Constraints of the [PieCanvas].
+  ///
+  /// If null, the constraints are calculated based on the theme.
+  final BoxConstraints? _constraints;
+
   @override
   bool shouldRepaint(PieDelegate oldDelegate) {
     return bounceAnimation != oldDelegate.bounceAnimation;
@@ -78,9 +85,13 @@ class PieDelegate extends FlowDelegate {
   }
 
   @override
-  BoxConstraints getConstraintsForChild(int i, BoxConstraints constraints) {
-    return BoxConstraints.tight(
-      Size.square(i == 0 ? theme.pointerSize : theme.buttonSize),
-    );
+  BoxConstraints getConstraintsForChild(
+    int i,
+    BoxConstraints constraints,
+  ) {
+    return _constraints ??
+        BoxConstraints.tight(
+          Size.square(i == 0 ? theme.pointerSize : theme.buttonSize),
+        );
   }
 }

lib/src/pie_theme.dart

@@ -148,6 +148,9 @@ class PieTheme {
   /// Alignment of the tooltip in the [PieCanvas].
   ///
   /// Setting this property will disable dynamic tooltip positioning.
+  ///
+  /// Setting this property to [Alignment.center] will center the tooltip
+  /// on the pressed position.
   final Alignment? tooltipCanvasAlignment;
 
   /// Whether to wrap the tooltip with [FittedBox] widget.

pubspec.yaml

@@ -1,6 +1,6 @@
 name: pie_menu
 description: A Flutter package providing a highly customizable circular/radial context menu
-version: 3.2.1
+version: 3.3.0
 homepage: https://github.com/rasitayaz/flutter-pie-menu
 repository: https://github.com/rasitayaz/flutter-pie-menu
 issue_tracker: https://github.com/rasitayaz/flutter-pie-menu/issues