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Add Infinite Canvas Support #1629

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Add Infinite Canvas Support #1629

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abb2bb9
feat: add infinitely expandable resizable pages
Julian-Florez Jan 7, 2026
67e8c95
Merge branch 'main' of https://github.com/Julian-Florez/saber
Julian-Florez Jan 7, 2026
6ac01a3
fix: translation
Julian-Florez Jan 7, 2026
4285be0
fix: removed rounded corners
Julian-Florez Jan 7, 2026
909aefc
fix: panning and renderizing of normal notes reverted
Julian-Florez Jan 8, 2026
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99 changes: 61 additions & 38 deletions lib/components/canvas/canvas.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -90,48 +90,71 @@ class Canvas extends StatelessWidget {

@override
Widget build(BuildContext context) {
return Center(
child: FittedBox(
child: DecoratedBox(
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: Colors.black.withValues(
alpha: 0.1,
), // dark regardless of theme
blurRadius: 10,
spreadRadius: 2,
),
],
final content = DecoratedBox(
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: Colors.black.withValues(
alpha: 0.1,
), // dark regardless of theme
blurRadius: 10,
spreadRadius: 2,
),
child: !placeholder
? SizedBox(
],
),
child: !placeholder
? SizedBox(
width: page.size.width,
height: page.size.height,
child: OnyxSdkPenArea(
refreshDelay: const Duration(seconds: 1),
strokeStyle: getOnyxTool(currentTool),
strokeColor: getOnyxColor(),
strokeWidth: getOnyxWidth(),
child: InnerCanvas(
key: page.innerCanvasKey,
pageIndex: pageIndex,
redrawPageListenable: page,
width: page.size.width,
height: page.size.height,
child: OnyxSdkPenArea(
refreshDelay: const Duration(seconds: 1),
strokeStyle: getOnyxTool(currentTool),
strokeColor: getOnyxColor(),
strokeWidth: getOnyxWidth(),
child: InnerCanvas(
key: page.innerCanvasKey,
pageIndex: pageIndex,
redrawPageListenable: page,
width: page.size.width,
height: page.size.height,
textEditing: textEditing,
coreInfo: coreInfo,
currentStroke: currentStroke,
currentStrokeDetectedShape: currentStrokeDetectedShape,
currentSelection: currentSelection,
setAsBackground: setAsBackground,
currentToolIsSelect: currentTool.toolId == ToolId.select,
currentScale: currentScale,
),
),
)
: SizedBox(width: page.size.width, height: page.size.height),
textEditing: textEditing,
coreInfo: coreInfo,
currentStroke: currentStroke,
currentStrokeDetectedShape: currentStrokeDetectedShape,
currentSelection: currentSelection,
setAsBackground: setAsBackground,
currentToolIsSelect: currentTool.toolId == ToolId.select,
currentScale: currentScale,
),
),
)
: SizedBox(width: page.size.width, height: page.size.height),
);

// For infinite pages we must NOT wrap with a FittedBox, because when the
// underlying page size changes (especially horizontally) FittedBox will
// rescale the child to fit the viewport which causes an unwanted visual
// zoom change. For normal pages, preserve the previous FittedBox
// behaviour to keep them centered and scaled to available space.
if (coreInfo.isInfinite) {
// Anchor infinite canvas content to the top-left so changes in width
// or height do not change the child's position relative to the
// viewport (avoids jumps when expanding horizontally/vertically).
// Use AnimatedSize for smooth expansion animation.
return Align(
alignment: Alignment.topLeft,
child: AnimatedSize(
duration: const Duration(milliseconds: 400),
curve: Curves.easeOutCubic,
alignment: Alignment.topLeft,
child: content,
),
);
}

return Center(
child: FittedBox(
child: content,
),
);
}
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