Network: add a banner indicating when we are not logging network requests

packages/devtools_app/lib/src/screens/network/network_screen.dart

@@ -206,72 +206,115 @@ class _NetworkProfilerControlsState extends State<_NetworkProfilerControls>
 
     final screenWidth = ScreenSize(context).width;
     final hasRequests = controller.filteredData.value.isNotEmpty;
-    return Row(
+    return Column(
       children: [
-        StartStopRecordingButton(
-          recording: _recording,
-          onPressed: () async => await controller.togglePolling(!_recording),
-          tooltipOverride: _recording
-              ? 'Stop recording network traffic'
-              : 'Resume recording network traffic',
-          minScreenWidthForText: double.infinity,
-          gaScreen: gac.network,
-          gaSelection: _recording ? gac.pause : gac.resume,
-        ),
-        const SizedBox(width: denseSpacing),
-        ClearButton(
-          minScreenWidthForText: _NetworkProfilerControls._includeTextWidth,
-          gaScreen: gac.network,
-          gaSelection: gac.clear,
-          onPressed: controller.clear,
+        Row(
+          children: [
+            StartStopRecordingButton(
+              recording: _recording,
+              onPressed: () async =>
+                  await controller.togglePolling(!_recording),
+              tooltipOverride: _recording
+                  ? 'Stop recording network traffic'
+                  : 'Resume recording network traffic',
+              minScreenWidthForText: double.infinity,
+              gaScreen: gac.network,
+              gaSelection: _recording ? gac.pause : gac.resume,
+            ),
+            const SizedBox(width: denseSpacing),
+            ClearButton(
+              minScreenWidthForText: _NetworkProfilerControls._includeTextWidth,
+              gaScreen: gac.network,
+              gaSelection: gac.clear,
+              onPressed: controller.clear,
+            ),
+            const SizedBox(width: denseSpacing),
+            // TODO(kenz): fix focus issue when state is refreshed
+            Expanded(
+              child: SearchField<NetworkController>(
+                searchController: controller,
+                searchFieldEnabled: hasRequests,
+                searchFieldWidth: screenWidth <= MediaSize.xs
+                    ? defaultSearchFieldWidth
+                    : wideSearchFieldWidth,
+              ),
+            ),
+            const SizedBox(width: denseSpacing),
+            Expanded(
+              child: StandaloneFilterField<NetworkRequest>(
+                controller: controller,
+                filteredItem: 'request',
+              ),
+            ),
+            const SizedBox(width: denseSpacing),
+            if (FeatureFlags.networkSaveLoad.isEnabled)
+              OpenSaveButtonGroup(
+                screenId: ScreenMetaData.network.id,
+                saveFormats: const [SaveFormat.devtools, SaveFormat.har],
+                gaItemForSaveFormatSelection: (SaveFormat format) =>
+                    switch (format) {
+                      SaveFormat.devtools => gac.saveFile,
+                      SaveFormat.har => gac.NetworkEvent.downloadAsHar.name,
+                    },
+                onSave: (SaveFormat format) async {
+                  switch (format) {
+                    case SaveFormat.devtools:
+                      await controller.fetchFullDataBeforeExport();
+                      controller.exportData();
+                    case SaveFormat.har:
+                      await controller.exportAsHarFile();
+                  }
+                },
+              )
+            else
+              DownloadButton(
+                tooltip: 'Download as .har file',
+                minScreenWidthForText:
+                    _NetworkProfilerControls._includeTextWidth,
+                onPressed: controller.exportAsHarFile,
+                gaScreen: gac.network,
+                gaSelection: gac.NetworkEvent.downloadAsHar.name,
+              ),
+          ],
         ),
-        const SizedBox(width: denseSpacing),
-        // TODO(kenz): fix focus issue when state is refreshed
-        Expanded(
-          child: SearchField<NetworkController>(
-            searchController: controller,
-            searchFieldEnabled: hasRequests,
-            searchFieldWidth: screenWidth <= MediaSize.xs
-                ? defaultSearchFieldWidth
-                : wideSearchFieldWidth,
+        if (!_recording)
+          const Padding(
+            padding: EdgeInsets.only(top: intermediateSpacing),
+            child: _RecordingPausedBanner(),
           ),
+      ],
+    );
+  }
+}
+
+class _RecordingPausedBanner extends StatelessWidget {
+  const _RecordingPausedBanner();
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    return Card(
+      color: theme.colorScheme.secondaryContainer,
+      child: Padding(
+        padding: const EdgeInsets.symmetric(
+          vertical: densePadding,
+          horizontal: denseSpacing,
         ),
-        const SizedBox(width: denseSpacing),
-        Expanded(
-          child: StandaloneFilterField<NetworkRequest>(
-            controller: controller,
-            filteredItem: 'request',
-          ),
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: [
+            Expanded(
+              child: Text(
+                'Network traffic recording is paused. Click the resume button '
+                'to continue.',
+                style: theme.regularTextStyle.copyWith(
+                  color: theme.colorScheme.onSecondaryContainer,
+                ),
+              ),
+            ),
+          ],
         ),
-        const SizedBox(width: denseSpacing),
-        if (FeatureFlags.networkSaveLoad.isEnabled)
-          OpenSaveButtonGroup(
-            screenId: ScreenMetaData.network.id,
-            saveFormats: const [SaveFormat.devtools, SaveFormat.har],
-            gaItemForSaveFormatSelection: (SaveFormat format) =>
-                switch (format) {
-                  SaveFormat.devtools => gac.saveFile,
-                  SaveFormat.har => gac.NetworkEvent.downloadAsHar.name,
-                },
-            onSave: (SaveFormat format) async {
-              switch (format) {
-                case SaveFormat.devtools:
-                  await controller.fetchFullDataBeforeExport();
-                  controller.exportData();
-                case SaveFormat.har:
-                  await controller.exportAsHarFile();
-              }
-            },
-          )
-        else
-          DownloadButton(
-            tooltip: 'Download as .har file',
-            minScreenWidthForText: _NetworkProfilerControls._includeTextWidth,
-            onPressed: controller.exportAsHarFile,
-            gaScreen: gac.network,
-            gaSelection: gac.NetworkEvent.downloadAsHar.name,
-          ),
-      ],
+      ),
     );
   }
 }

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

@@ -42,9 +42,12 @@ TODO: Remove this section if there are not any general updates.
 
 ## Network profiler updates
 
-* Fixed layout of the "error count" badge in the tab name.
-* Fix display of "Response Headers" and "Request Headers" when there are no
-  headers.
+* Fixed layout of the "error count" badge in the tab name. -
+  [#9470](https://github.com/flutter/devtools/pull/9470)
+* Fixed display of "Response Headers" and "Request Headers" when there are no
+  headers. - [#9492](https://github.com/flutter/devtools/pull/9492)
+* Added a banner to clearly indicate when DevTools is not logging network
+  requests. - [#9495](https://github.com/flutter/devtools/pull/9495)
 
 ## Logging updates