🎨 Improve how MediaQuery is being listened

Author: AlexV525

CHANGELOG.md

@@ -9,7 +9,9 @@ that can be found in the LICENSE file. -->
 
 ## Unreleased
 
-*None.*
+**Improvements**
+
+- Improve how `MediaQuery` is being listened.
 
 ## 9.5.1
 

lib/src/delegates/asset_picker_builder_delegate.dart

@@ -717,6 +717,7 @@ abstract class AssetPickerBuilderDelegate<Asset, Path> {
   /// The overlay when the permission is limited.
   Widget permissionOverlay(BuildContext context) {
     final Size size = MediaQuery.sizeOf(context);
+    final EdgeInsets padding = MediaQuery.paddingOf(context);
     final Widget closeButton = Container(
       margin: const EdgeInsetsDirectional.only(start: 16, top: 4),
       alignment: AlignmentDirectional.centerStart,
@@ -793,7 +794,7 @@ abstract class AssetPickerBuilderDelegate<Asset, Path> {
           child: Semantics(
             sortKey: const OrdinalSortKey(0),
             child: Container(
-              padding: EdgeInsets.only(top: MediaQuery.paddingOf(context).top),
+              padding: EdgeInsets.only(top: padding.top),
               color: context.theme.canvasColor,
               child: Column(
                 children: <Widget>[
@@ -803,10 +804,7 @@ abstract class AssetPickerBuilderDelegate<Asset, Path> {
                   SizedBox(height: size.height / 18),
                   accessLimitedButton,
                   SizedBox(
-                    height: math.max(
-                      MediaQuery.paddingOf(context).bottom,
-                      24.0,
-                    ),
+                    height: math.max(padding.bottom, 24.0),
                   ),
                 ],
               ),
@@ -1317,6 +1315,7 @@ class DefaultAssetPickerBuilderDelegate
   Widget assetsGridBuilder(BuildContext context) {
     appBarPreferredSize ??= appBar(context).preferredSize;
     final bool gridRevert = effectiveShouldRevertGrid(context);
+    final accessibleNavigation = MediaQuery.accessibleNavigationOf(context);
     return Selector<DefaultAssetPickerProvider, PathWrapper<AssetPathEntity>?>(
       selector: (_, DefaultAssetPickerProvider p) => p.currentPath,
       builder: (context, wrapper, _) {
@@ -1374,8 +1373,7 @@ class DefaultAssetPickerBuilderDelegate
                 );
 
                 // Enables drag-to-select.
-                if (dragToSelect ??
-                    !MediaQuery.accessibleNavigationOf(context)) {
+                if (dragToSelect ?? !accessibleNavigation) {
                   child = GestureDetector(
                     excludeFromSemantics: true,
                     onHorizontalDragStart: (d) {

lib/src/widget/asset_picker_app_bar.dart

@@ -113,10 +113,12 @@ class AssetPickerAppBar extends StatelessWidget implements PreferredSizeWidget {
     } else {
       titleWidget = title;
     }
+
+    final EdgeInsets padding = MediaQuery.paddingOf(context);
     Widget child = Container(
       width: double.maxFinite,
-      height: _barHeight + MediaQuery.paddingOf(context).top,
-      padding: EdgeInsets.only(top: MediaQuery.paddingOf(context).top),
+      height: _barHeight + padding.top,
+      padding: EdgeInsets.only(top: padding.top),
       child: Stack(
         children: <Widget>[
           if (canPop(context))