Add width, minWidth and maxWidth properties on NavigationPane (bdluka…

…a#99)

lib/src/controls/navigation/navigation_view/pane.dart

@@ -71,6 +71,9 @@ class NavigationPane with Diagnosticable {
     this.key,
     this.selected,
     this.onChanged,
+    this.width,
+    this.maxWidth,
+    this.minWidth,
     this.header,
     this.items = const [],
     this.footerItems = const [],
@@ -81,7 +84,8 @@ class NavigationPane with Diagnosticable {
     this.menuButton,
     this.scrollController,
     this.indicatorBuilder = defaultNavigationIndicator,
-  }) : assert(selected == null || selected >= 0);
+  })  : assert(selected == null || selected >= 0),
+        assert(minWidth == null || maxWidth == null || minWidth <= maxWidth);
 
   final Key? key;
 
@@ -97,6 +101,31 @@ class NavigationPane with Diagnosticable {
   /// is null
   final Widget? menuButton;
 
+  /// The width of the pane.
+  ///
+  /// If the value is null, [_kOpenNavigationPanelWidth] is used.
+  /// The width can be based on MediaQuery and used
+  /// with [minWidth] and [maxWidth].
+  ///
+  /// Only used when the pane is open.
+  final double? width;
+
+  /// The minimum width of the pane.
+  ///
+  /// If width is smaller than minWidth, minWidth is used as width.
+  /// minWidth must be smaller or equal to maxWidth.
+  ///
+  /// Only used when the pane is open.
+  final double? minWidth;
+
+  /// The maximum width of the pane.
+  ///
+  /// If width is greater than maxWidth, maxWidth is used as width.
+  /// maxWidth must be greater or equal than minWidth.
+  ///
+  /// Only used when the pane is open.
+  final double? maxWidth;
+
   /// The header of the pane.
   ///
   /// Usually a [Text] or an [Image].
@@ -543,11 +572,19 @@ class _OpenNavigationPane extends StatelessWidget {
       }
       return const SizedBox.shrink();
     }();
+    var paneWidth = pane.width ?? _kOpenNavigationPanelWidth;
+    if (pane.maxWidth != null && paneWidth > pane.maxWidth!) {
+      paneWidth = pane.maxWidth!;
+    }
+    if (pane.minWidth != null && paneWidth < pane.minWidth!) {
+      paneWidth = pane.minWidth!;
+    }
+
     return AnimatedContainer(
       key: paneKey,
       duration: theme.animationDuration ?? Duration.zero,
       curve: theme.animationCurve ?? Curves.linear,
-      width: _kOpenNavigationPanelWidth,
+      width: paneWidth,
       child: pane.indicatorBuilder(
         context: context,
         pane: pane,

lib/src/controls/navigation/navigation_view/view.dart

@@ -218,6 +218,9 @@ class NavigationViewState extends State<NavigationView> {
                 autoSuggestBox: pane.autoSuggestBox,
                 autoSuggestBoxReplacement: pane.autoSuggestBoxReplacement,
                 footerItems: pane.footerItems,
+                width: pane.width,
+                minWidth: pane.minWidth,
+                maxWidth: pane.maxWidth,
                 header: pane.header,
                 items: pane.items,
                 key: pane.key,