Merge pull request #798 from glucoseinc/fix/progress-bar-does-not-follow-drag

Fix: Progress bar does not follow drag #789

Author: diegotori

lib/src/material/widgets/options_dialog.dart

@@ -28,9 +28,7 @@ class _OptionsDialogState extends State<OptionsDialog> {
             itemCount: widget.options.length,
             itemBuilder: (context, i) {
               return ListTile(
-                onTap: widget.options[i].onTap != null
-                    ? widget.options[i].onTap!
-                    : null,
+                onTap: widget.options[i].onTap,
                 leading: Icon(widget.options[i].iconData),
                 title: Text(widget.options[i].title),
                 subtitle: widget.options[i].subtitle != null

lib/src/progress_bar.dart

@@ -74,6 +74,7 @@ class _VideoProgressBarState extends State<VideoProgressBar> {
         barHeight: widget.barHeight,
         handleHeight: widget.handleHeight,
         drawShadow: widget.drawShadow,
+        latestDraggableOffset: _latestDraggableOffset,
       ),
     );
 
@@ -151,10 +152,12 @@ class StaticProgressBar extends StatelessWidget {
       child: CustomPaint(
         painter: _ProgressBarPainter(
           value: value,
-          draggableValue: context.calcRelativePosition(
-            value.duration,
-            latestDraggableOffset,
-          ),
+          draggableValue: latestDraggableOffset != null
+              ? context.calcRelativePosition(
+                  value.duration,
+                  latestDraggableOffset!,
+                )
+              : null,
           colors: colors,
           barHeight: barHeight,
           handleHeight: handleHeight,
@@ -181,7 +184,10 @@ class _ProgressBarPainter extends CustomPainter {
   final double barHeight;
   final double handleHeight;
   final bool drawShadow;
-  final Duration draggableValue;
+
+  /// The value of the draggable progress bar.
+  /// If null, the progress bar is not being dragged.
+  final Duration? draggableValue;
 
   @override
   bool shouldRepaint(CustomPainter painter) {
@@ -205,8 +211,8 @@ class _ProgressBarPainter extends CustomPainter {
     if (!value.isInitialized) {
       return;
     }
-    final double playedPartPercent = (draggableValue != Duration.zero
-            ? draggableValue.inMilliseconds
+    final double playedPartPercent = (draggableValue != null
+            ? draggableValue!.inMilliseconds
             : value.position.inMilliseconds) /
         value.duration.inMilliseconds;
     final double playedPart =
@@ -259,12 +265,11 @@ class _ProgressBarPainter extends CustomPainter {
 extension RelativePositionExtensions on BuildContext {
   Duration calcRelativePosition(
     Duration videoDuration,
-    Offset? globalPosition,
+    Offset globalPosition,
   ) {
-    if (globalPosition == null) return Duration.zero;
     final box = findRenderObject()! as RenderBox;
     final Offset tapPos = box.globalToLocal(globalPosition);
-    final double relative = tapPos.dx / box.size.width;
+    final double relative = (tapPos.dx / box.size.width).clamp(0, 1);
     final Duration position = videoDuration * relative;
     return position;
   }