From 98c76c29c284a7cb4b626b0075e04a702b2baf91 Mon Sep 17 00:00:00 2001
From: Karl Power <karl.power@clickhouse.com>
Date: Wed, 6 May 2026 15:47:06 +0200
Subject: [PATCH] feat: add full-width drawer toggle

---
 packages/app/src/SessionSidePanel.tsx         | 32 ++++++++++--
 .../app/src/components/DBRowSidePanel.tsx     | 19 ++++++-
 .../src/components/DBRowSidePanelHeader.tsx   | 37 ++++++++-----
 packages/app/src/components/DrawerUtils.tsx   | 52 ++++++++++++++++++-
 packages/app/src/hooks/useResizable.tsx       |  1 +
 5 files changed, 121 insertions(+), 20 deletions(-)

diff --git a/packages/app/src/SessionSidePanel.tsx b/packages/app/src/SessionSidePanel.tsx
index 94895c7994..15a8ad907c 100644
--- a/packages/app/src/SessionSidePanel.tsx
+++ b/packages/app/src/SessionSidePanel.tsx
@@ -1,4 +1,4 @@
-import { useMemo, useState } from 'react';
+import { useCallback, useMemo, useState } from 'react';
 import CopyToClipboard from 'react-copy-to-clipboard';
 import { useHotkeys } from 'react-hotkeys-hook';
 import {
@@ -8,15 +8,23 @@ import {
   TSessionSource,
   TTraceSource,
 } from '@hyperdx/common-utils/dist/types';
-import { ActionIcon, Button, Drawer } from '@mantine/core';
+import { ActionIcon, Box, Button, Drawer, Group } from '@mantine/core';
 import { notifications } from '@mantine/notifications';
 import { IconLink, IconX } from '@tabler/icons-react';
 
+import {
+  DrawerFullWidthToggle,
+  getInitialDrawerWidthPercent,
+} from '@/components/DrawerUtils';
+import useResizable from '@/hooks/useResizable';
+
 import { Session } from './sessions';
 import SessionSubpanel from './SessionSubpanel';
 import { formatDistanceToNowStrictShort } from './utils';
 import { ZIndexContext } from './zIndex';
 
+import styles from '@/../styles/LogSidePanel.module.scss';
+
 export default function SessionSidePanel({
   traceSource,
   sessionSource,
@@ -42,6 +50,14 @@ export default function SessionSidePanel({
   // Keep track of sub-drawers so we can disable closing this root drawer
   const [subDrawerOpen, setSubDrawerOpen] = useState(false);
 
+  const { size, setSize, startResize } = useResizable(
+    getInitialDrawerWidthPercent(),
+  );
+  const isFullWidth = size >= 99;
+  const toggleFullWidth = useCallback(() => {
+    setSize(isFullWidth ? getInitialDrawerWidthPercent() : 100);
+  }, [isFullWidth, setSize]);
+
   useHotkeys(
     ['esc'],
     () => {
@@ -68,7 +84,7 @@ export default function SessionSidePanel({
         }
       }}
       position="right"
-      size="82vw"
+      size={`${size}vw`}
       withCloseButton={false}
       zIndex={zIndex}
       styles={{
@@ -83,7 +99,9 @@ export default function SessionSidePanel({
         <div
           className="d-flex flex-column h-100"
           data-testid="session-side-panel"
+          style={{ position: 'relative' }}
         >
+          <Box className={styles.panelDragBar} onMouseDown={startResize} />
           <div>
             <div className="p-3 d-flex align-items-center justify-content-between border-bottom border-dark">
               <div style={{ width: '50%', maxWidth: 500 }}>
@@ -102,7 +120,11 @@ export default function SessionSidePanel({
                   <span>{session?.sessionCount} Events</span>
                 </div>
               </div>
-              <div className="d-flex gap-2">
+              <Group gap="xs" align="center" wrap="nowrap">
+                <DrawerFullWidthToggle
+                  isFullWidth={isFullWidth}
+                  onToggle={toggleFullWidth}
+                />
                 <CopyToClipboard
                   text={window.location.href}
                   onCopy={() => {
@@ -124,7 +146,7 @@ export default function SessionSidePanel({
                 <ActionIcon variant="secondary" size="md" onClick={onClose}>
                   <IconX size={14} />
                 </ActionIcon>
-              </div>
+              </Group>
             </div>
           </div>
           {sessionId != null ? (
diff --git a/packages/app/src/components/DBRowSidePanel.tsx b/packages/app/src/components/DBRowSidePanel.tsx
index d77020865f..9efff30ed3 100644
--- a/packages/app/src/components/DBRowSidePanel.tsx
+++ b/packages/app/src/components/DBRowSidePanel.tsx
@@ -45,6 +45,7 @@ import { RowDataPanel, useRowData } from './DBRowDataPanel';
 import { RowOverviewPanel } from './DBRowOverviewPanel';
 import { DBSessionPanel, useSessionId } from './DBSessionPanel';
 import DBTracePanel from './DBTracePanel';
+import { getInitialDrawerWidthPercent } from './DrawerUtils';
 
 import styles from '@/../styles/LogSidePanel.module.scss';
 
@@ -109,8 +110,12 @@ const DBRowSidePanel = ({
   onClose,
   breadcrumbPath,
   onBreadcrumbClick,
+  isFullWidth,
+  onToggleFullWidth,
 }: DBRowSidePanelProps & {
   setSubDrawerOpen: Dispatch<SetStateAction<boolean>>;
+  isFullWidth?: boolean;
+  onToggleFullWidth?: () => void;
 }) => {
   const {
     data: rowData,
@@ -329,6 +334,8 @@ const DBRowSidePanel = ({
           rowData={normalizedRow}
           breadcrumbPath={breadcrumbPath}
           onBreadcrumbClick={handleBreadcrumbClick}
+          isFullWidth={isFullWidth}
+          onToggleFullWidth={onToggleFullWidth}
         />
       </Box>
       {/* <SidePanelHeader
@@ -558,8 +565,14 @@ export default function DBRowSidePanelErrorBoundary({
   const contextZIndex = useZIndex();
   const drawerZIndex = contextZIndex + 10;
 
-  const initialWidth = 80;
-  const { size, startResize } = useResizable(initialWidth);
+  const { size, setSize, startResize } = useResizable(
+    getInitialDrawerWidthPercent(),
+  );
+
+  const isFullWidth = size >= 99;
+  const toggleFullWidth = useCallback(() => {
+    setSize(isFullWidth ? getInitialDrawerWidthPercent() : 100);
+  }, [isFullWidth, setSize]);
 
   // Keep track of sub-drawers so we can disable closing this root drawer
   const [subDrawerOpen, setSubDrawerOpen] = useState(false);
@@ -629,6 +642,8 @@ export default function DBRowSidePanelErrorBoundary({
               breadcrumbPath={breadcrumbPath}
               setSubDrawerOpen={setSubDrawerOpen}
               onBreadcrumbClick={onBreadcrumbClick}
+              isFullWidth={isFullWidth}
+              onToggleFullWidth={isNestedPanel ? undefined : toggleFullWidth}
             />
           </ErrorBoundary>
         </div>
diff --git a/packages/app/src/components/DBRowSidePanelHeader.tsx b/packages/app/src/components/DBRowSidePanelHeader.tsx
index 7be8126fe5..8c6f79bf66 100644
--- a/packages/app/src/components/DBRowSidePanelHeader.tsx
+++ b/packages/app/src/components/DBRowSidePanelHeader.tsx
@@ -30,6 +30,7 @@ import {
   HighlightedAttribute,
 } from './DBHighlightedAttributesList';
 import { RowSidePanelContext } from './DBRowSidePanel';
+import { DrawerFullWidthToggle } from './DrawerUtils';
 import LogLevel from './LogLevel';
 
 const isValidDate = (date: Date) => 'getTime' in date && !isNaN(date.getTime());
@@ -134,6 +135,8 @@ export default function DBRowSidePanelHeader({
   rowData,
   breadcrumbPath,
   onBreadcrumbClick,
+  isFullWidth,
+  onToggleFullWidth,
 }: {
   date: Date;
   mainContent?: string;
@@ -143,6 +146,8 @@ export default function DBRowSidePanelHeader({
   rowData?: Record<string, any>;
   breadcrumbPath?: BreadcrumbPath;
   onBreadcrumbClick?: BreadcrumbNavigationCallback;
+  isFullWidth?: boolean;
+  onToggleFullWidth?: () => void;
 }) {
   const [bodyExpanded, setBodyExpanded] = React.useState(false);
   const { generateSearchUrl } = useContext(RowSidePanelContext);
@@ -212,18 +217,26 @@ export default function DBRowSidePanelHeader({
       />
 
       {/* Event timestamp and severity */}
-      <Flex>
-        {severityText && <LogLevel level={severityText} />}
-        {severityText && isValidDate(date) && (
-          <Text size="xs" mx="xs">
-            &middot;
-          </Text>
-        )}
-        {isValidDate(date) && (
-          <Text size="xs">
-            <FormatTime value={date} /> &middot;{' '}
-            {formatDistanceToNowStrictShort(date)} ago
-          </Text>
+      <Flex justify="space-between" align="center">
+        <Flex align="center">
+          {severityText && <LogLevel level={severityText} />}
+          {severityText && isValidDate(date) && (
+            <Text size="xs" mx="xs">
+              &middot;
+            </Text>
+          )}
+          {isValidDate(date) && (
+            <Text size="xs">
+              <FormatTime value={date} /> &middot;{' '}
+              {formatDistanceToNowStrictShort(date)} ago
+            </Text>
+          )}
+        </Flex>
+        {onToggleFullWidth && (
+          <DrawerFullWidthToggle
+            isFullWidth={isFullWidth}
+            onToggle={onToggleFullWidth}
+          />
         )}
       </Flex>
       {mainContent ? (
diff --git a/packages/app/src/components/DrawerUtils.tsx b/packages/app/src/components/DrawerUtils.tsx
index ef524d4af4..984dc027b1 100644
--- a/packages/app/src/components/DrawerUtils.tsx
+++ b/packages/app/src/components/DrawerUtils.tsx
@@ -1,6 +1,56 @@
 import * as React from 'react';
 import { useHotkeys } from 'react-hotkeys-hook';
-import { Box, CloseButton, Group, Text } from '@mantine/core';
+import {
+  ActionIcon,
+  Box,
+  CloseButton,
+  Group,
+  Text,
+  Tooltip,
+} from '@mantine/core';
+import {
+  IconLayoutSidebarRightCollapse,
+  IconLayoutSidebarRightExpand,
+} from '@tabler/icons-react';
+
+const LARGE_SCREEN_BREAKPOINT_PX = 1440;
+const LARGE_SCREEN_DRAWER_WIDTH_PERCENT = 60;
+const SMALL_SCREEN_DRAWER_WIDTH_PERCENT = 80;
+
+export function getInitialDrawerWidthPercent(): number {
+  if (typeof window === 'undefined') {
+    return SMALL_SCREEN_DRAWER_WIDTH_PERCENT;
+  }
+
+  if (window.innerWidth > LARGE_SCREEN_BREAKPOINT_PX) {
+    return LARGE_SCREEN_DRAWER_WIDTH_PERCENT;
+  }
+
+  return SMALL_SCREEN_DRAWER_WIDTH_PERCENT;
+}
+
+export const DrawerFullWidthToggle = React.memo<{
+  isFullWidth?: boolean;
+  onToggle: () => void;
+}>(({ isFullWidth, onToggle }) => {
+  const label = isFullWidth ? 'Collapse panel width' : 'Expand panel width';
+  return (
+    <Tooltip label={label} position="bottom">
+      <ActionIcon
+        variant="subtle"
+        size="sm"
+        onClick={onToggle}
+        aria-label={label}
+      >
+        {isFullWidth ? (
+          <IconLayoutSidebarRightCollapse size={16} />
+        ) : (
+          <IconLayoutSidebarRightExpand size={16} />
+        )}
+      </ActionIcon>
+    </Tooltip>
+  );
+});
 
 export const DrawerHeader = React.memo<{
   header?: React.ReactNode;
diff --git a/packages/app/src/hooks/useResizable.tsx b/packages/app/src/hooks/useResizable.tsx
index fcc4ac51ce..2b927a06c7 100644
--- a/packages/app/src/hooks/useResizable.tsx
+++ b/packages/app/src/hooks/useResizable.tsx
@@ -76,6 +76,7 @@ function useResizable(
 
   return {
     size: sizePercentage,
+    setSize: setSizePercentage,
     startResize,
   };
 }