41 lines
1.4 KiB
Dart
41 lines
1.4 KiB
Dart
import 'dart:math';
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import 'package:aves/model/settings/settings.dart';
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import 'package:flutter/widgets.dart';
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class TileExtentManager {
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static const int columnCountMin = 2;
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static const int columnCountDefault = 4;
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static const double tileExtentMin = 46.0;
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static const screenDimensionMin = tileExtentMin * columnCountMin;
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static double applyTileExtent(Size mqSize, double mqHorizontalPadding, ValueNotifier<double> extentNotifier, {double newExtent}) {
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// sanitize screen size (useful when reloading while screen is off, reporting a 0,0 size)
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mqSize = Size(max(mqSize.width, screenDimensionMin), max(mqSize.height, screenDimensionMin));
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final availableWidth = mqSize.width - mqHorizontalPadding;
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var numColumns;
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if ((newExtent ?? 0) == 0) {
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newExtent = extentNotifier.value;
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}
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if ((newExtent ?? 0) == 0) {
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newExtent = settings.collectionTileExtent;
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}
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if ((newExtent ?? 0) == 0) {
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numColumns = columnCountDefault;
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} else {
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newExtent = newExtent.clamp(tileExtentMin, extentMaxForSize(mqSize));
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numColumns = max(columnCountMin, (availableWidth / newExtent).round());
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}
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newExtent = availableWidth / numColumns;
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if (extentNotifier.value != newExtent) {
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settings.collectionTileExtent = newExtent;
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extentNotifier.value = newExtent;
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}
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return newExtent;
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}
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static double extentMaxForSize(Size mqSize) {
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return mqSize.shortestSide / columnCountMin;
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}
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}
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