refa custom painter

Signed-off-by: dom <githubaccount56556@proton.me>
2026-04-20 03:06:59 +08:00 · 2026-01-18 22:21:48 +08:00
parent a3ddc83430
commit f5657d2d4c
9 changed files with 586 additions and 275 deletions
--- a/lib/common/widgets/cropped_image.dart
+++ b/lib/common/widgets/cropped_image.dart
@@ -0,0 +1,163 @@
+/*
+ * This file is part of PiliPlus
+ *
+ * PiliPlus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * PiliPlus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PiliPlus.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import 'dart:ui' as ui;
+
+import 'package:flutter/widgets.dart';
+
+class CroppedImage extends LeafRenderObjectWidget {
+  const CroppedImage({
+    super.key,
+    required this.size,
+    required this.image,
+    required this.srcRect,
+    required this.dstRect,
+    required this.rrect,
+    required this.imgPaint,
+    required this.borderPaint,
+  });
+
+  final Size size;
+  final ui.Image image;
+  final Rect srcRect;
+  final Rect dstRect;
+  final RRect rrect;
+  final Paint imgPaint;
+  final Paint borderPaint;
+
+  @override
+  RenderObject createRenderObject(BuildContext context) {
+    return RenderCroppedImage(
+      preferredSize: size,
+      image: image,
+      srcRect: srcRect,
+      dstRect: dstRect,
+      rrect: rrect,
+      imgPaint: imgPaint,
+      borderPaint: borderPaint,
+    );
+  }
+
+  @override
+  void updateRenderObject(
+    BuildContext context,
+    RenderCroppedImage renderObject,
+  ) {
+    renderObject
+      ..preferredSize = size
+      ..image = image
+      ..srcRect = srcRect
+      ..dstRect = dstRect
+      ..rrect = rrect
+      ..imgPaint = imgPaint
+      ..borderPaint = borderPaint;
+  }
+}
+
+class RenderCroppedImage extends RenderBox {
+  RenderCroppedImage({
+    required Size preferredSize,
+    required ui.Image image,
+    required Rect srcRect,
+    required Rect dstRect,
+    required RRect rrect,
+    required Paint imgPaint,
+    required Paint borderPaint,
+  }) : _preferredSize = preferredSize,
+       _image = image,
+       _srcRect = srcRect,
+       _dstRect = dstRect,
+       _rrect = rrect,
+       _imgPaint = imgPaint,
+       _borderPaint = borderPaint;
+
+  Size _preferredSize;
+  Size get preferredSize => _preferredSize;
+  set preferredSize(Size value) {
+    if (_preferredSize == value) return;
+    _preferredSize = value;
+    markNeedsLayout();
+  }
+
+  ui.Image _image;
+  ui.Image get image => _image;
+  set image(ui.Image value) {
+    if (_image == value) return;
+    _image = value;
+    markNeedsPaint();
+  }
+
+  Rect _srcRect;
+  Rect get srcRect => _srcRect;
+  set srcRect(Rect value) {
+    if (_srcRect == value) return;
+    _srcRect = value;
+    markNeedsPaint();
+  }
+
+  Rect _dstRect;
+  Rect get dstRect => _dstRect;
+  set dstRect(Rect value) {
+    if (_dstRect == value) return;
+    _dstRect = value;
+    markNeedsPaint();
+  }
+
+  RRect _rrect;
+  RRect get rrect => _rrect;
+  set rrect(RRect value) {
+    if (_rrect == value) return;
+    _rrect = value;
+    markNeedsPaint();
+  }
+
+  Paint _imgPaint;
+  Paint get imgPaint => _imgPaint;
+  set imgPaint(Paint value) {
+    if (_imgPaint == value) return;
+    _imgPaint = value;
+    markNeedsPaint();
+  }
+
+  Paint _borderPaint;
+  Paint get borderPaint => _borderPaint;
+  set borderPaint(Paint value) {
+    if (_borderPaint == value) return;
+    _borderPaint = value;
+    markNeedsPaint();
+  }
+
+  @override
+  void performLayout() {
+    size = computeDryLayout(constraints);
+  }
+
+  @override
+  Size computeDryLayout(BoxConstraints constraints) {
+    return constraints.constrain(_preferredSize);
+  }
+
+  @override
+  void paint(PaintingContext context, Offset offset) {
+    context.canvas
+      ..drawImageRect(image, srcRect, dstRect, _imgPaint)
+      ..drawRRect(rrect, _borderPaint);
+  }
+
+  @override
+  bool get isRepaintBoundary => true;
+}