Enhance FilePreview Component with Download Progress Indication

- Integrated download progress tracking in the FilePreview component to provide users with real-time feedback during file loading.
- Updated fetchFileContent function in ApiServerContext to support progress callbacks, enhancing user experience during file downloads.
- Refactored rendering logic in FilePreview to display a progress overlay while files are being fetched, improving visual feedback and interaction.

src/components/Dashboard/Management/Files/FileInfo.jsx

@@ -206,12 +206,20 @@ const FileInfo = () => {
               collapseKey='preview'
             >
               {objectFormState?.objectData?._id ? (
-                <Card styles={{ body: { minHeight: 'calc(100vh - 218px)' } }}>
+                <Spin
-                  <FilePreview
+                  spinning={objectFormState.loading}
-                    file={objectFormState?.objectData}
+                  indicator={<LoadingOutlined />}
-                    style={{ width: '100%', height: '100%' }}
+                >
-                  />
+                  <Card
-                </Card>
+                    style={{ height: 'calc(100vh - 218px)' }}
+                    styles={{ body: { height: '100%', minHeight: 0 } }}
+                  >
+                    <FilePreview
+                      file={objectFormState?.objectData}
+                      style={{ width: '100%', height: '100%' }}
+                    />
+                  </Card>
+                </Spin>
               ) : (
                 <MissingPlaceholder message={'No file.'} />
               )}

src/components/Dashboard/common/FilePreview.jsx

@@ -1,4 +1,5 @@
 import PropTypes from 'prop-types'
+import { Card, Flex } from 'antd'
 import { ApiServerContext } from '../context/ApiServerContext'
 import {
   useCallback,
@@ -8,10 +9,10 @@ import {
   memo,
   useRef
 } from 'react'
-import LoadingPlaceholder from './LoadingPlaceholder'
 import GCodePreview from './GCodePreview'
 import ThreeDPreview from './ThreeDPreview'
 import PDFPreview from './PDFPreview'
+import ProgressDisplay from './ProgressDisplay'
 import { AuthContext } from '../context/AuthContext'
 
 const hasExplicitPreviewHeight = (height) =>
@@ -25,6 +26,10 @@ const FilePreview = ({ file, style = {} }) => {
   const [fileObjectUrl, setFileObjectUrl] = useState(null)
   const [loading, setLoading] = useState(true)
   const [error, setError] = useState(null)
+  const [downloadProgress, setDownloadProgress] = useState({
+    progress: 0,
+    message: 'Loading file preview...'
+  })
 
   const currentId = useRef(null)
 
@@ -39,80 +44,147 @@ const FilePreview = ({ file, style = {} }) => {
     if (error != null) {
       return
     }
+    const requestId = file._id
     setLoading(true)
-    const objectUrl = await fetchFileContent(file, false)
+    setDownloadProgress({ progress: 0, message: 'Starting download...' })
+    const objectUrl = await fetchFileContent(file, false, (progress) => {
+      if (currentId.current !== requestId) {
+        return
+      }
+      setDownloadProgress(progress)
+    })
+    if (currentId.current !== requestId) {
+      return
+    }
     if (objectUrl == null) {
       setLoading(false)
+      setDownloadProgress(null)
       console.error('Failed to fetch file content', file)
       setError('Failed to fetch file content')
       return
     }
     setFileObjectUrl(objectUrl)
+    setDownloadProgress(null)
     setLoading(false)
   }, [file, fetchFileContent, error])
 
   useEffect(() => {
+    if (file._id !== currentId.current) {
+      setFileObjectUrl(null)
+      setError(null)
+      setLoading(true)
+      setDownloadProgress({
+        progress: 0,
+        message: 'Loading file preview...'
+      })
+    }
     if (file?.type && token != null && file._id !== currentId.current) {
       currentId.current = file._id
       fetchPreview()
     }
   }, [file._id, file?.type, fetchPreview, token])
 
-  if (isPdf) {
+  const showProgressOverlay = downloadProgress != null
-    if (error != null) {
+  const wrapperHeight = hasExplicitPreviewHeight(style.height)
-      return <div style={{ color: 'red' }}>{error}</div>
+    ? style.height
+    : isPdf
+      ? '72vh'
+      : style.height
+
+  const renderPreview = () => {
+    if (isPdf) {
+      return (
+        <PDFPreview
+          file={fileObjectUrl}
+          loading={loading}
+          style={{
+            ...style,
+            height: '100%'
+          }}
+        />
+      )
     }
 
-    return (
+    if (loading == true || !file?.type) {
-      <PDFPreview
+      return null
-        file={fileObjectUrl}
+    }
-        loading={loading}
-        style={{
-          ...style,
-          height: hasExplicitPreviewHeight(style.height)
-            ? style.height
-            : '72vh'
-        }}
-      />
-    )
-  }
 
-  if (loading == true || !file?.type) {
+    if (isGcode && fileObjectUrl) {
-    return <LoadingPlaceholder message={'Loading file preview...'} />
+      return (
+        <GCodePreview
+          src={fileObjectUrl}
+          startLayer={0}
+          endLayer={undefined}
+          lineWidth={1}
+          style={style}
+        />
+      )
+    }
+
+    if (is3DModel && fileObjectUrl) {
+      return (
+        <ThreeDPreview
+          src={fileObjectUrl}
+          style={style}
+          extension={file.extension}
+        />
+      )
+    }
+
+    if (isImage && fileObjectUrl) {
+      return <img src={fileObjectUrl} style={style}></img>
+    }
+
+    return null
   }
 
   if (error != null) {
     return <div style={{ color: 'red' }}>{error}</div>
   }
 
-  if (isGcode && fileObjectUrl) {
+  return (
-    return (
+    <div
-      <GCodePreview
+      style={{
-        src={fileObjectUrl}
+        ...style,
-        topLayerColor={'#ff9800'}
+        position: 'relative',
-        lastSegmentColor={'#e91e63'}
+        height: wrapperHeight,
-        startLayer={0}
+        minHeight:
-        endLayer={undefined}
+          showProgressOverlay && !wrapperHeight ? 240 : style.minHeight
-        lineWidth={1}
+      }}
-        style={style}
+    >
-      />
+      <div
-    )
+        className={`previewProgressOverlay ${showProgressOverlay ? 'visible' : 'hidden'}`}
-  }
+      >
-
+        {showProgressOverlay ? (
-  if (is3DModel && fileObjectUrl) {
+          <Flex
-    return (
+            style={{ width: '100%', height: '100%' }}
-      <ThreeDPreview
+            align='center'
-        src={fileObjectUrl}
+            justify='center'
-        style={style}
+          >
-        extension={file.extension}
+            <Card
-      />
+              style={{
-    )
+                maxWidth: 360,
-  }
+                minWidth: 100,
-
+                width: '100%',
-  if (isImage && fileObjectUrl) {
+                margin: 24
-    return <img src={fileObjectUrl} style={style}></img>
+              }}
-  }
+              styles={{ body: { padding: 18 } }}
-  return null
+            >
+              <ProgressDisplay
+                percent={Math.round(
+                  (Number(downloadProgress.progress) || 0) * 100
+                )}
+                status='active'
+              >
+                {downloadProgress.message || 'Downloading...'}
+              </ProgressDisplay>
+            </Card>
+          </Flex>
+        ) : null}
+      </div>
+      {renderPreview()}
+    </div>
+  )
 }
 
 FilePreview.propTypes = {
@@ -124,6 +196,8 @@ FilePreview.propTypes = {
 const areEqual = (prevProps, nextProps) => {
   return (
     prevProps.file?._id === nextProps.file?._id &&
+    prevProps.file?.type === nextProps.file?.type &&
+    prevProps.file?.size === nextProps.file?.size &&
     JSON.stringify(prevProps.style) === JSON.stringify(nextProps.style)
   )
 }

src/components/Dashboard/common/GCodePreview.jsx

@@ -1,7 +1,67 @@
 import * as GCodePreview from 'gcode-preview'
 import PropTypes from 'prop-types'
-import { useCallback, useEffect, useRef } from 'react'
+import { Button, Card, Flex, Slider } from 'antd'
+import { useCallback, useEffect, useRef, useState } from 'react'
 import * as THREE from 'three'
+import PlusIcon from '../../Icons/PlusIcon.jsx'
+import MinusIcon from '../../Icons/MinusIcon.jsx'
+import PanIcon from '../../Icons/PanIcon.jsx'
+import PanFilledIcon from '../../Icons/PanFilledIcon.jsx'
+import KeyboardShortcut from './KeyboardShortcut.jsx'
+import usePinchZoom, {
+  clampPreviewScale,
+  MAX_PREVIEW_SCALE,
+  MIN_PREVIEW_SCALE
+} from '../hooks/usePinchZoom.js'
+import { useThemeContext } from '../context/ThemeContext'
+
+function toThreeColorHex(color, fallback) {
+  try {
+    return new THREE.Color(color || fallback).getHex()
+  } catch {
+    return new THREE.Color(fallback).getHex()
+  }
+}
+
+function getPreviewThemeColors({
+  isDarkMode,
+  token,
+  topLayerColor,
+  lastSegmentColor
+}) {
+  return {
+    backgroundColor: isDarkMode ? '#1f1f1f' : '#ffffff',
+    extrusionColor: token.colorPrimary,
+    travelColor: isDarkMode ? '#8c8c8c' : '#bfbfbf',
+    topLayerColor: topLayerColor || token.colorWarning,
+    lastSegmentColor: lastSegmentColor || token.colorPink
+  }
+}
+
+function getCameraDistance(preview) {
+  const distance = preview.camera.position.distanceTo(preview.controls.target)
+  return Number.isFinite(distance) && distance > 0 ? distance : null
+}
+
+function getCameraScale(preview, baseDistance) {
+  const distance = getCameraDistance(preview)
+  return distance == null ? null : clampPreviewScale(baseDistance / distance)
+}
+
+function applyCameraScale(preview, baseDistance, scale) {
+  const { camera, controls } = preview
+  const distance = getCameraDistance(preview)
+  if (distance == null) return
+
+  const nextDistance = baseDistance / scale
+  if (Math.abs(nextDistance - distance) <= distance * 1e-4) return
+
+  const offset = camera.position.clone().sub(controls.target)
+  camera.position
+    .copy(controls.target)
+    .addScaledVector(offset, nextDistance / distance)
+  controls.update()
+}
 
 function GCodePreviewUI(props) {
   const {
@@ -13,40 +73,107 @@ function GCodePreviewUI(props) {
     lineWidth,
     style = {}
   } = props
+  const { isDarkMode, themeConfig } = useThemeContext()
+  const { colorPrimary, colorWarning, colorPink } = themeConfig.token
   const canvasRef = useRef(null)
+  const previewPaneRef = useRef(null)
   const previewRef = useRef(null)
+  const baseDistanceRef = useRef(1)
+  const applyingScaleRef = useRef(false)
+  const [preview, setPreview] = useState(null)
+  const [previewScale, setPreviewScale] = useState(1)
+  const [panMode, setPanMode] = useState(false)
+  const [isDragging, setIsDragging] = useState(false)
 
   const resizePreview = useCallback(() => {
     previewRef.current?.resize()
   }, [])
 
-  // Ex-ref methods removed; this component is now a regular functional component
-
   useEffect(() => {
     if (!canvasRef.current) return
 
+    const themeColors = getPreviewThemeColors({
+      isDarkMode,
+      token: { colorPrimary, colorWarning, colorPink },
+      topLayerColor,
+      lastSegmentColor
+    })
+
     previewRef.current?.dispose?.()
-    previewRef.current = GCodePreview.init({
+    const instance = GCodePreview.init({
       canvas: canvasRef.current,
       startLayer,
       endLayer,
       lineWidth,
-      topLayerColor: new THREE.Color(topLayerColor).getHex(),
+      backgroundColor: toThreeColorHex(themeColors.backgroundColor, '#ffffff'),
-      lastSegmentColor: new THREE.Color(lastSegmentColor).getHex(),
+      extrusionColor: toThreeColorHex(themeColors.extrusionColor, '#0091FF'),
+      travelColor: toThreeColorHex(themeColors.travelColor, '#8c8c8c'),
+      topLayerColor: toThreeColorHex(themeColors.topLayerColor, '#FF9230'),
+      lastSegmentColor: toThreeColorHex(
+        themeColors.lastSegmentColor,
+        '#FF69B4'
+      ),
       buildVolume: { x: 250, y: 220, z: 150 },
       initialCameraPosition: [0, 400, 450],
       allowDragNDrop: false
     })
+    previewRef.current = instance
 
+    const { camera, controls } = instance
+    baseDistanceRef.current = getCameraDistance(instance) || 1
+    // The camera dollies instead of scaling pixels, so the frustum has to
+    // cover the full zoom range.
+    camera.far = Math.max(
+      camera.far,
+      (baseDistanceRef.current / MIN_PREVIEW_SCALE) * 2
+    )
+    camera.updateProjectionMatrix()
+    controls.minDistance = baseDistanceRef.current / MAX_PREVIEW_SCALE
+    controls.maxDistance = baseDistanceRef.current / MIN_PREVIEW_SCALE
+
+    const handleControlsChange = () => {
+      if (applyingScaleRef.current) return
+      const scale = getCameraScale(instance, baseDistanceRef.current)
+      if (scale == null) return
+      setPreviewScale((prev) => (Math.abs(prev - scale) < 0.001 ? prev : scale))
+    }
+    const handleControlsStart = () => setIsDragging(true)
+    const handleControlsEnd = () => setIsDragging(false)
+
+    controls.addEventListener('change', handleControlsChange)
+    controls.addEventListener('start', handleControlsStart)
+    controls.addEventListener('end', handleControlsEnd)
+
+    instance.resize()
+    setPreview(instance)
+
+    const pane = previewPaneRef.current
+    const resizeObserver =
+      pane && typeof ResizeObserver === 'function'
+        ? new ResizeObserver(resizePreview)
+        : null
+    resizeObserver?.observe(pane)
     window.addEventListener('resize', resizePreview)
 
     return () => {
+      resizeObserver?.disconnect()
       window.removeEventListener('resize', resizePreview)
-      previewRef.current?.dispose?.()
+      controls.removeEventListener('change', handleControlsChange)
-      previewRef.current = null
+      controls.removeEventListener('start', handleControlsStart)
+      controls.removeEventListener('end', handleControlsEnd)
+      setPreview(null)
+      setIsDragging(false)
+      instance.dispose?.()
+      if (previewRef.current === instance) {
+        previewRef.current = null
+      }
     }
   }, [
+    colorPink,
+    colorPrimary,
+    colorWarning,
     endLayer,
+    isDarkMode,
     lastSegmentColor,
     lineWidth,
     startLayer,
@@ -54,17 +181,49 @@ function GCodePreviewUI(props) {
     resizePreview
   ])
 
+  useEffect(() => {
+    if (!preview) return
+    applyingScaleRef.current = true
+    applyCameraScale(preview, baseDistanceRef.current, previewScale)
+    applyingScaleRef.current = false
+  }, [preview, previewScale])
+
+  useEffect(() => {
+    if (!preview) return
+    preview.controls.mouseButtons = {
+      LEFT: panMode ? THREE.MOUSE.PAN : THREE.MOUSE.ROTATE,
+      MIDDLE: THREE.MOUSE.DOLLY,
+      RIGHT: panMode ? THREE.MOUSE.ROTATE : THREE.MOUSE.PAN
+    }
+    preview.controls.touches = {
+      ONE: panMode ? THREE.TOUCH.PAN : THREE.TOUCH.ROTATE,
+      TWO: THREE.TOUCH.DOLLY_PAN
+    }
+  }, [preview, panMode])
+
+  usePinchZoom({
+    containerRef: previewPaneRef,
+    scale: previewScale,
+    onScaleChange: setPreviewScale,
+    enabled: preview != null
+  })
+
+  const resetView = useCallback(() => {
+    preview?.controls.reset()
+    setPreviewScale(1)
+  }, [preview])
+
   useEffect(() => {
     let cancelled = false
 
     const loadFromSrc = async () => {
-      const preview = previewRef.current
+      const instance = previewRef.current
-      if (!src || !preview) return
+      if (!src || !instance) return
       try {
         const response = await fetch(src)
         const text = await response.text()
-        if (cancelled || previewRef.current !== preview) return
+        if (cancelled || previewRef.current !== instance) return
-        preview.processGCode(text)
+        instance.processGCode(text)
       } catch (e) {
         if (cancelled) return
         console.error('Failed to load G-code from src', e)
@@ -75,9 +234,124 @@ function GCodePreviewUI(props) {
     return () => {
       cancelled = true
     }
-  }, [endLayer, lastSegmentColor, lineWidth, src, startLayer, topLayerColor])
+  }, [
+    colorPink,
+    colorPrimary,
+    colorWarning,
+    endLayer,
+    isDarkMode,
+    lastSegmentColor,
+    lineWidth,
+    src,
+    startLayer,
+    topLayerColor
+  ])
 
-  return <canvas ref={canvasRef} style={style}></canvas>
+  return (
+    <Flex
+      vertical
+      gap={'middle'}
+      style={{ width: '100%', height: '100%', minHeight: 0, ...style }}
+    >
+      <Flex gap={'small'}>
+        <KeyboardShortcut
+          shortcut={'alt+p'}
+          hint={'ALT P'}
+          onTrigger={() => {
+            setPanMode((prev) => !prev)
+          }}
+        >
+          <Button
+            icon={
+              panMode ? (
+                <PanFilledIcon style={{ color: 'var(--color-primary)' }} />
+              ) : (
+                <PanIcon />
+              )
+            }
+            onClick={() => {
+              setPanMode((prev) => !prev)
+            }}
+          />
+        </KeyboardShortcut>
+        <Button
+          icon={<PlusIcon />}
+          onClick={() => {
+            setPreviewScale((prev) => clampPreviewScale(prev + 0.05))
+          }}
+        />
+        <Button
+          readOnly={true}
+          style={{ minWidth: '70px' }}
+          onClick={resetView}
+        >
+          {previewScale.toFixed(2)}x
+        </Button>
+        <Button
+          icon={<MinusIcon />}
+          onClick={() => {
+            setPreviewScale((prev) => clampPreviewScale(prev - 0.05))
+          }}
+        />
+      </Flex>
+
+      <div
+        ref={previewPaneRef}
+        style={{ flex: '1 1 auto', minHeight: 0, position: 'relative' }}
+      >
+        <Card
+          style={{
+            width: '100%',
+            height: '100%',
+            borderRadius: 0
+          }}
+          styles={{
+            body: {
+              padding: 0,
+              height: '100%',
+              minHeight: 0
+            }
+          }}
+        >
+          <canvas
+            ref={canvasRef}
+            style={{
+              display: 'block',
+              width: '100%',
+              height: '100%',
+              backgroundColor: 'var(--layout-modal-bg)',
+              cursor: panMode ? (isDragging ? 'grabbing' : 'grab') : undefined
+            }}
+          ></canvas>
+        </Card>
+        <div className='previewZoomOverlay'>
+          <Card
+            style={{ borderRadius: 18 }}
+            styles={{ body: { padding: '10px 17px', width: 200 } }}
+            className='previewZoomCard'
+          >
+            <Slider
+              min={MIN_PREVIEW_SCALE}
+              max={MAX_PREVIEW_SCALE}
+              step={0.05}
+              tooltip={{ open: false }}
+              value={previewScale}
+              style={{ margin: 0 }}
+              onChange={(value) => setPreviewScale(value)}
+              classNames={{
+                handle: 'previewZoomSliderHandle'
+              }}
+              styles={{
+                track: {
+                  background: 'var(--color-primary)'
+                }
+              }}
+            />
+          </Card>
+        </div>
+      </div>
+    </Flex>
+  )
 }
 
 GCodePreviewUI.propTypes = {

src/components/Dashboard/common/ThreeDPreview.jsx

@@ -1,7 +1,190 @@
 import PropTypes from 'prop-types'
+import { Button, Card, Flex, Slider } from 'antd'
 import { useCallback, useEffect, useRef, useState } from 'react'
 import * as OV from 'online-3d-viewer'
 import LoadingPlaceholder from './LoadingPlaceholder'
+import KeyboardShortcut from './KeyboardShortcut'
+import PlusIcon from '../../Icons/PlusIcon.jsx'
+import MinusIcon from '../../Icons/MinusIcon.jsx'
+import PanIcon from '../../Icons/PanIcon.jsx'
+import PanFilledIcon from '../../Icons/PanFilledIcon.jsx'
+import usePinchZoom, {
+  clampPreviewScale,
+  nextScaleFromWheel,
+  MAX_PREVIEW_SCALE,
+  MIN_PREVIEW_SCALE
+} from '../hooks/usePinchZoom.js'
+import { useThemeContext } from '../context/ThemeContext'
+
+const DEG_TO_RAD = Math.PI / 180
+
+function parseHexColor(color) {
+  if (!color) return null
+  const match = String(color)
+    .trim()
+    .match(/^#([0-9a-f]{3,8})$/i)
+  if (!match) return null
+
+  let hex = match[1]
+  if (hex.length === 3 || hex.length === 4) {
+    hex = hex
+      .split('')
+      .map((char) => char + char)
+      .join('')
+  }
+  if (hex.length !== 6 && hex.length !== 8) return null
+
+  return {
+    r: parseInt(hex.slice(0, 2), 16),
+    g: parseInt(hex.slice(2, 4), 16),
+    b: parseInt(hex.slice(4, 6), 16),
+    a: hex.length === 8 ? parseInt(hex.slice(6, 8), 16) : 255
+  }
+}
+
+function parseCssColor(color, fallbackHex) {
+  const fallback = parseHexColor(fallbackHex) || {
+    r: 255,
+    g: 255,
+    b: 255,
+    a: 255
+  }
+  if (!color) return fallback
+
+  const hex = parseHexColor(color)
+  if (hex) return hex
+
+  const rgbMatch = String(color)
+    .trim()
+    .match(
+      /^rgba?\(\s*([\d.]+)\s*,\s*([\d.]+)\s*,\s*([\d.]+)(?:\s*,\s*([\d.]+))?\s*\)$/i
+    )
+  if (!rgbMatch) return fallback
+
+  return {
+    r: Number(rgbMatch[1]),
+    g: Number(rgbMatch[2]),
+    b: Number(rgbMatch[3]),
+    a:
+      rgbMatch[4] === undefined
+        ? 255
+        : Math.round(Math.min(1, Number(rgbMatch[4])) * 255)
+  }
+}
+
+function getCssVarColor(name, fallbackHex) {
+  if (typeof document === 'undefined') {
+    return parseCssColor(fallbackHex, fallbackHex)
+  }
+  const value = getComputedStyle(document.documentElement)
+    .getPropertyValue(name)
+    .trim()
+  return parseCssColor(value, fallbackHex)
+}
+
+function getViewerThemeColors(backgroundColorOverride) {
+  return {
+    background: backgroundColorOverride
+      ? parseCssColor(backgroundColorOverride, '#ffffff')
+      : getCssVarColor('--layout-modal-bg', '#ffffff'),
+    defaultColor: getCssVarColor('--color-primary', '#0091FF'),
+    edgeColor: getCssVarColor('--color-text', '#000000')
+  }
+}
+
+function toRgbaColor(color) {
+  return new OV.RGBAColor(color.r, color.g, color.b, color.a ?? 255)
+}
+
+function toRgbColor(color) {
+  return new OV.RGBColor(color.r, color.g, color.b)
+}
+
+function applyViewerTheme(embeddedViewer, colors) {
+  if (!embeddedViewer?.GetViewer) return
+  const viewer3d = embeddedViewer.GetViewer()
+  viewer3d.SetBackgroundColor(toRgbaColor(colors.background))
+  viewer3d.SetEdgeSettings(
+    new OV.EdgeSettings(false, toRgbColor(colors.edgeColor), 1)
+  )
+}
+
+function fitModelToViewport(embeddedViewer) {
+  const viewer3d = embeddedViewer?.GetViewer?.()
+  if (!viewer3d) return
+  embeddedViewer.Resize?.()
+  const boundingSphere = viewer3d.GetBoundingSphere?.(() => true)
+  if (!boundingSphere) return
+  viewer3d.AdjustClippingPlanesToSphere?.(boundingSphere)
+  viewer3d.FitSphereToWindow?.(boundingSphere, false)
+}
+
+function getViewer3d(embeddedViewer) {
+  return embeddedViewer?.GetViewer?.() || null
+}
+
+function getCameraDistance(camera) {
+  return OV.CoordDistance3D(camera.eye, camera.center)
+}
+
+// The viewer derives its clipping planes from the model size alone, which leaves
+// the model behind the far plane once the eye is far enough away, so widen them
+// based on the eye distance as well.
+function adjustClippingToDistance(viewer3d, distance) {
+  const boundingSphere = viewer3d.GetBoundingSphere?.(() => true)
+  if (!boundingSphere) return
+  const radius = Math.max(
+    boundingSphere.radius,
+    (distance + boundingSphere.radius) / 10
+  )
+  viewer3d.AdjustClippingPlanesToSphere?.({
+    center: boundingSphere.center,
+    radius
+  })
+}
+
+// Zooming moves the eye along the view axis, keeping the look-at point fixed.
+function setCameraDistance(viewer3d, distance) {
+  const camera = viewer3d.GetCamera().Clone()
+  const eyeDirection = OV.SubCoord3D(camera.eye, camera.center).Normalize()
+  camera.eye = camera.center.Clone().Offset(eyeDirection, distance)
+  adjustClippingToDistance(viewer3d, distance)
+  viewer3d.SetCamera(camera)
+}
+
+function getWorldUnitsPerPixel(viewer3d, camera) {
+  const canvas = viewer3d.GetCanvas?.()
+  const canvasHeight = canvas?.clientHeight || canvas?.height || 1
+  const viewportHeight =
+    2 * getCameraDistance(camera) * Math.tan((camera.fov / 2) * DEG_TO_RAD)
+  return viewportHeight / canvasHeight
+}
+
+// Panning moves the eye and the look-at point together, so the model tracks the
+// pointer one to one at the current zoom level.
+function panCameraByPixels(viewer3d, pixelsX, pixelsY) {
+  const camera = viewer3d.GetCamera().Clone()
+  const viewDirection = OV.SubCoord3D(camera.center, camera.eye).Normalize()
+  const horizontalDirection = OV.CrossVector3D(
+    viewDirection,
+    camera.up
+  ).Normalize()
+  const verticalDirection = OV.CrossVector3D(
+    horizontalDirection,
+    viewDirection
+  ).Normalize()
+
+  const unitsPerPixel = getWorldUnitsPerPixel(viewer3d, camera)
+  const moveX = pixelsX * unitsPerPixel
+  const moveY = pixelsY * unitsPerPixel
+
+  camera.eye.Offset(horizontalDirection, -moveX)
+  camera.center.Offset(horizontalDirection, -moveX)
+  camera.eye.Offset(verticalDirection, moveY)
+  camera.center.Offset(verticalDirection, moveY)
+
+  viewer3d.SetCamera(camera)
+}
 
 function ThreeDPreview(props) {
   const {
@@ -10,25 +193,59 @@ function ThreeDPreview(props) {
     width = 500,
     height = 500,
     style = {},
-    backgroundColor = '#ffffff'
+    backgroundColor,
+    enableControls = true
   } = props
+  const { isDarkMode } = useThemeContext()
   const containerRef = useRef(null)
   const viewer = useRef(null)
   const [isLoading, setIsLoading] = useState(false)
   const [error, setError] = useState(null)
+  const [zoomScale, setZoomScale] = useState(1)
+  const [panMode, setPanMode] = useState(false)
+  const [isPanning, setIsPanning] = useState(false)
+  // Eye to center distance of the fitted view, which is what 1.00x means here.
+  const fitDistanceRef = useRef(null)
+  const zoomScaleRef = useRef(zoomScale)
+  zoomScaleRef.current = zoomScale
+  const panStartRef = useRef({ x: 0, y: 0 })
 
   const resizeViewer = useCallback(() => {
-    if (viewer.current && containerRef.current) {
+    viewer.current?.Resize?.()
-      // Resize the viewer container
+  }, [])
-      const container = containerRef.current
+
-      if (container.style.width !== width + 'px') {
+  const applyZoomScale = useCallback((nextScale) => {
-        container.style.width = width + 'px'
+    const viewer3d = getViewer3d(viewer.current)
-      }
+    const fitDistance = fitDistanceRef.current
-      if (container.style.height !== height + 'px') {
+    if (!viewer3d || !fitDistance) return
-        container.style.height = height + 'px'
+    const scale = clampPreviewScale(nextScale)
-      }
+    setCameraDistance(viewer3d, fitDistance / scale)
-    }
+    setZoomScale(scale)
-  }, [viewer, width, height])
+  }, [])
+
+  const captureFittedZoom = useCallback(() => {
+    const viewer3d = getViewer3d(viewer.current)
+    if (!viewer3d) return
+    fitDistanceRef.current = getCameraDistance(viewer3d.GetCamera())
+    setZoomScale(1)
+  }, [])
+
+  // The viewer handles orbit and ctrl/two finger zoom itself, so read the camera
+  // back once a gesture ends to keep the readout and the zoom limits in step.
+  const syncZoomScaleFromCamera = useCallback(() => {
+    const viewer3d = getViewer3d(viewer.current)
+    const fitDistance = fitDistanceRef.current
+    if (!viewer3d || !fitDistance) return
+    const distance = getCameraDistance(viewer3d.GetCamera())
+    if (distance <= 0) return
+    applyZoomScale(fitDistance / distance)
+  }, [applyZoomScale])
+
+  const resetView = useCallback(() => {
+    if (!viewer.current) return
+    fitModelToViewport(viewer.current)
+    captureFittedZoom()
+  }, [captureFittedZoom])
 
   useEffect(() => {
     // Variable to track the viewer instance created in this effect
@@ -40,6 +257,8 @@ function ThreeDPreview(props) {
       try {
         setIsLoading(true)
         setError(null)
+        fitDistanceRef.current = null
+        setZoomScale(1)
 
         // Clear any existing viewer
         if (viewer.current) {
@@ -60,6 +279,8 @@ function ThreeDPreview(props) {
           return
         }
 
+        const themeColors = getViewerThemeColors(backgroundColor)
+
         // Initialize the online-3d-viewer using OV.EmbeddedViewer
         const newViewer = new OV.EmbeddedViewer(containerRef.current, {
           camera: new OV.Camera(
@@ -68,15 +289,34 @@ function ThreeDPreview(props) {
             new OV.Coord3D(0.0, 1.0, 0.0),
             45.0
           ),
-          backgroundColor: new OV.RGBAColor(255, 255, 255, 255),
+          backgroundColor: toRgbaColor(themeColors.background),
-          defaultColor: new OV.RGBColor(200, 200, 200),
+          defaultColor: toRgbColor(themeColors.defaultColor),
-          edgeSettings: new OV.EdgeSettings(false, new OV.RGBColor(0, 0, 0), 1),
+          edgeSettings: new OV.EdgeSettings(
-          environmentSettings: new OV.EnvironmentSettings([], false)
+            false,
+            toRgbColor(themeColors.edgeColor),
+            1
+          ),
+          environmentSettings: new OV.EnvironmentSettings([], false),
+          onModelLoaded: () => {
+            if (currentViewer !== newViewer) return
+            fitModelToViewport(newViewer)
+            requestAnimationFrame(() => {
+              if (currentViewer !== newViewer) return
+              fitModelToViewport(newViewer)
+              requestAnimationFrame(() => {
+                if (currentViewer !== newViewer) return
+                fitModelToViewport(newViewer)
+                captureFittedZoom()
+              })
+            })
+            setIsLoading(false)
+          }
         })
 
         // Store the viewer instance in the ref and local variable
         viewer.current = newViewer
         currentViewer = newViewer
+        newViewer.Resize?.()
 
         try {
           setIsLoading(true)
@@ -92,8 +332,7 @@ function ThreeDPreview(props) {
           })
 
           // Load model from file using LoadModelFromFileList
-          await newViewer.LoadModelFromFileList([file])
+          newViewer.LoadModelFromFileList([file])
-          setIsLoading(false)
         } catch (err) {
           console.error('Failed to load 3D model from src', err)
           setError('Failed to load 3D model')
@@ -108,54 +347,342 @@ function ThreeDPreview(props) {
 
     initializeViewer()
 
+    const container = containerRef.current
+    const resizeObserver =
+      container && typeof ResizeObserver !== 'undefined'
+        ? new ResizeObserver(() => {
+            resizeViewer()
+          })
+        : null
+    resizeObserver?.observe(container)
     window.addEventListener('resize', resizeViewer)
 
     return () => {
+      resizeObserver?.disconnect()
       window.removeEventListener('resize', resizeViewer)
       if (currentViewer && currentViewer.dispose) {
         currentViewer.dispose()
       }
     }
-  }, [width, height, src, extension, resizeViewer])
+  }, [src, extension, resizeViewer, backgroundColor, captureFittedZoom])
 
-  const containerStyle = {
+  useEffect(() => {
-    width: width + 'px',
+    let cancelled = false
-    height: height + 'px',
+
-    backgroundColor,
+    const applyTheme = () => {
-    position: 'relative',
+      if (cancelled || !viewer.current) return
-    ...style
+      applyViewerTheme(viewer.current, getViewerThemeColors(backgroundColor))
+    }
+
+    applyTheme()
+    // ThemeContext writes CSS vars in a parent effect; re-read after it runs.
+    queueMicrotask(applyTheme)
+
+    return () => {
+      cancelled = true
+    }
+  }, [isDarkMode, backgroundColor])
+
+  // Trackpad pinch and ctrl+wheel, shared with the PDF and template previews.
+  usePinchZoom({
+    containerRef,
+    scale: zoomScale,
+    onScaleChange: applyZoomScale,
+    enabled: enableControls
+  })
+
+  // Plain wheel zooms too, but through our clamped scale instead of the
+  // viewer's own unbounded wheel handler.
+  useEffect(() => {
+    const container = containerRef.current
+    if (!enableControls || !container) {
+      return undefined
+    }
+
+    const options = { capture: true, passive: false }
+    const handleWheel = (event) => {
+      if (event.ctrlKey || event.metaKey) {
+        return
+      }
+      if (event.target?.closest?.('.previewZoomOverlay')) {
+        return
+      }
+      event.preventDefault()
+      event.stopPropagation()
+      applyZoomScale(nextScaleFromWheel(zoomScaleRef.current, event))
+    }
+
+    container.addEventListener('wheel', handleWheel, options)
+    return () => {
+      container.removeEventListener('wheel', handleWheel, options)
+    }
+  }, [applyZoomScale, enableControls])
+
+  useEffect(() => {
+    const container = containerRef.current
+    if (!enableControls || !container) {
+      return undefined
+    }
+
+    container.addEventListener('pointerup', syncZoomScaleFromCamera)
+    container.addEventListener('pointercancel', syncZoomScaleFromCamera)
+    return () => {
+      container.removeEventListener('pointerup', syncZoomScaleFromCamera)
+      container.removeEventListener('pointercancel', syncZoomScaleFromCamera)
+    }
+  }, [enableControls, syncZoomScaleFromCamera])
+
+  useEffect(() => {
+    if (!panMode) {
+      setIsPanning(false)
+    }
+  }, [panMode])
+
+  // In pan mode a left drag pans instead of orbiting, so the viewer's own
+  // navigation must not see those events.
+  useEffect(() => {
+    const container = containerRef.current
+    if (!panMode || !container) {
+      return undefined
+    }
+
+    const options = { capture: true, passive: false }
+    const blockViewerNavigation = (event) => {
+      if (event.type === 'mousedown' && event.button !== 0) {
+        return
+      }
+      event.preventDefault()
+      event.stopPropagation()
+    }
+
+    const handlePointerDown = (event) => {
+      if (event.pointerType === 'mouse' && event.button !== 0) {
+        return
+      }
+      panStartRef.current = { x: event.clientX, y: event.clientY }
+      setIsPanning(true)
+    }
+
+    container.addEventListener('mousedown', blockViewerNavigation, options)
+    container.addEventListener('touchstart', blockViewerNavigation, options)
+    container.addEventListener('touchmove', blockViewerNavigation, options)
+    container.addEventListener('pointerdown', handlePointerDown)
+    return () => {
+      container.removeEventListener('mousedown', blockViewerNavigation, options)
+      container.removeEventListener(
+        'touchstart',
+        blockViewerNavigation,
+        options
+      )
+      container.removeEventListener('touchmove', blockViewerNavigation, options)
+      container.removeEventListener('pointerdown', handlePointerDown)
+    }
+  }, [panMode])
+
+  useEffect(() => {
+    if (!isPanning) {
+      return undefined
+    }
+
+    const previousCursor = document.body.style.cursor
+    const previousUserSelect = document.body.style.userSelect
+    document.body.style.cursor = 'grabbing'
+    document.body.style.userSelect = 'none'
+
+    const handlePointerMove = (event) => {
+      const viewer3d = getViewer3d(viewer.current)
+      if (!viewer3d) {
+        return
+      }
+      const { x, y } = panStartRef.current
+      panStartRef.current = { x: event.clientX, y: event.clientY }
+      panCameraByPixels(viewer3d, event.clientX - x, event.clientY - y)
+    }
+
+    const handlePointerUp = () => {
+      setIsPanning(false)
+    }
+
+    window.addEventListener('pointermove', handlePointerMove)
+    window.addEventListener('pointerup', handlePointerUp)
+    window.addEventListener('pointercancel', handlePointerUp)
+    return () => {
+      document.body.style.cursor = previousCursor
+      document.body.style.userSelect = previousUserSelect
+      window.removeEventListener('pointermove', handlePointerMove)
+      window.removeEventListener('pointerup', handlePointerUp)
+      window.removeEventListener('pointercancel', handlePointerUp)
+    }
+  }, [isPanning])
+
+  // The wrapper owns the size the caller asked for; the preview pane takes
+  // whatever is left once the toolbar has been laid out.
+  const { width: styleWidth, height: styleHeight, ...paneStyle } = style
+
+  const wrapperStyle = {
+    width: styleWidth ?? width + 'px',
+    height: styleHeight ?? height + 'px',
+    minHeight: 0
   }
 
+  const containerStyle = {
+    flex: '1 1 auto',
+    minHeight: 0,
+    backgroundColor: backgroundColor || 'var(--layout-modal-bg)',
+    position: 'relative',
+    ...paneStyle
+  }
+
+  const controlsDisabled = isLoading || error != null
+  const panCursor = panMode ? (isPanning ? 'grabbing' : 'grab') : undefined
+
   return (
-    <div style={containerStyle}>
+    <Flex vertical gap={'middle'} style={wrapperStyle}>
-      <div
+      {enableControls ? (
-        ref={containerRef}
+        <Flex gap={'small'}>
-        style={{
+          <KeyboardShortcut
-          width: '100%',
+            shortcut={'alt+p'}
-          height: '100%',
+            hint={'ALT P'}
-          position: 'relative'
+            onTrigger={() => {
-        }}
+              setPanMode((prev) => !prev)
-      />
+            }}
-      {isLoading && <LoadingPlaceholder message={'Loading 3D preview...'} />}
+          >
-      {error && (
+            <Button
+              icon={
+                panMode ? (
+                  <PanFilledIcon style={{ color: 'var(--color-primary)' }} />
+                ) : (
+                  <PanIcon />
+                )
+              }
+              disabled={controlsDisabled}
+              onClick={() => {
+                setPanMode((prev) => !prev)
+              }}
+            />
+          </KeyboardShortcut>
+          <Button
+            icon={<PlusIcon />}
+            disabled={controlsDisabled}
+            onClick={() => {
+              applyZoomScale(zoomScale + 0.05)
+            }}
+          />
+          <Button
+            readOnly={true}
+            style={{ minWidth: '70px' }}
+            disabled={controlsDisabled}
+            onClick={resetView}
+          >
+            {zoomScale.toFixed(2)}x
+          </Button>
+          <Button
+            icon={<MinusIcon />}
+            disabled={controlsDisabled}
+            onClick={() => {
+              applyZoomScale(zoomScale - 0.05)
+            }}
+          />
+        </Flex>
+      ) : null}
+      <div style={containerStyle}>
+        {enableControls ? (
+          <div className='previewZoomOverlay'>
+            <Card
+              style={{ borderRadius: 18 }}
+              styles={{ body: { padding: '10px 17px', width: 200 } }}
+              className='previewZoomCard'
+            >
+              <Slider
+                min={MIN_PREVIEW_SCALE}
+                max={MAX_PREVIEW_SCALE}
+                step={0.05}
+                tooltip={{ open: false }}
+                value={zoomScale}
+                disabled={controlsDisabled}
+                style={{ margin: 0 }}
+                onChange={applyZoomScale}
+                classNames={{
+                  handle: 'previewZoomSliderHandle'
+                }}
+                styles={{
+                  track: {
+                    background: 'var(--color-primary)'
+                  }
+                }}
+              />
+            </Card>
+          </div>
+        ) : null}
+        <Card
+          style={{
+            width: '100%',
+            height: '100%',
+            borderRadius: 0,
+            backgroundColor: backgroundColor || 'var(--layout-modal-bg)'
+          }}
+          styles={{
+            body: {
+              padding: 0,
+              height: '100%',
+              minHeight: 0
+            }
+          }}
+        >
+          <div
+            ref={containerRef}
+            style={{
+              width: '100%',
+              height: '100%',
+              opacity: isLoading ? 0 : 1,
+              minHeight: 0,
+              cursor: panCursor,
+              touchAction: panMode ? 'none' : undefined,
+              position: 'relative',
+              overflow: 'hidden',
+              // The viewer appends a plain inline canvas, whose baseline gap
+              // would otherwise push it past the bottom of the card.
+              lineHeight: 0
+            }}
+          />
+        </Card>
+
         <div
           style={{
             position: 'absolute',
-            top: '50%',
+            inset: 0,
-            left: '50%',
+            opacity: isLoading ? 1 : 0,
-            transform: 'translate(-50%, -50%)',
+            zIndex: 1,
-            background: 'rgba(255, 0, 0, 0.1)',
+            display: 'flex',
-            color: '#d32f2f',
+            pointerEvents: !isLoading ? 'none' : 'auto',
-            padding: '10px',
+            alignItems: 'center',
-            borderRadius: '4px',
+            justifyContent: 'center'
-            fontSize: '14px',
-            textAlign: 'center'
           }}
         >
-          {error}
+          <LoadingPlaceholder message={'Loading 3D preview...'} />
         </div>
-      )}
+
-    </div>
+        {error && (
+          <div
+            style={{
+              position: 'absolute',
+              top: '50%',
+              left: '50%',
+              transform: 'translate(-50%, -50%)',
+              background:
+                'color-mix(in srgb, var(--color-error) 12%, transparent)',
+              color: 'var(--color-error)',
+              padding: '10px',
+              borderRadius: '4px',
+              fontSize: '14px',
+              textAlign: 'center'
+            }}
+          >
+            {error}
+          </div>
+        )}
+      </div>
+    </Flex>
   )
 }
 

src/components/Dashboard/context/ApiServerContext.jsx

@@ -1829,8 +1829,11 @@ const ApiServerProvider = ({ children }) => {
   }
 
   // Download GCode file content
-  const fetchFileContent = async (file, download = false) => {
+  const fetchFileContent = async (file, download = false, onProgress = null) => {
     try {
+      if (typeof onProgress === 'function') {
+        onProgress({ progress: 0, message: 'Starting download...' })
+      }
       const response = await axios.get(
         `${config.backendUrl}/files/${file._id}/content`,
         {
@@ -1838,13 +1841,32 @@ const ApiServerProvider = ({ children }) => {
             Accept: '*/*',
             Authorization: `Bearer ${token}`
           },
-          responseType: 'blob'
+          responseType: 'blob',
+          onDownloadProgress: (progressEvent) => {
+            if (typeof onProgress !== 'function') {
+              return
+            }
+            const total =
+              progressEvent.total > 0
+                ? progressEvent.total
+                : typeof file.size === 'number' && file.size > 0
+                  ? file.size
+                  : 0
+            const progress = total > 0 ? progressEvent.loaded / total : 0
+            onProgress({
+              progress: Math.min(progress, 1),
+              message: 'Downloading...'
+            })
+          }
         }
       )
       const blob = new Blob([response.data], {
         type: response.headers['content-type']
       })
       const fileURL = window.URL.createObjectURL(blob)
+      if (typeof onProgress === 'function') {
+        onProgress({ progress: 1, message: 'Download complete' })
+      }
       if (download == true) {
         const fileLink = document.createElement('a')
         fileLink.href = fileURL
@@ -1858,7 +1880,7 @@ const ApiServerProvider = ({ children }) => {
     } catch (err) {
       console.error(err)
       showError(err, () => {
-        fetchFileContent(file, download)
+        fetchFileContent(file, download, onProgress)
       })
     }
   }

src/components/Dashboard/hooks/usePinchZoom.js

@@ -13,7 +13,7 @@ export const clampPreviewScale = (value) => {
   return Math.round(clamped * 10000) / 10000
 }
 
-const nextScaleFromWheel = (scale, event) => {
+export const nextScaleFromWheel = (scale, event) => {
   const intensity = event.deltaMode === 1 ? 0.12 : 0.0045
   return clampPreviewScale(scale * Math.exp(-event.deltaY * intensity))
 }

src/database/models/File.js

@@ -111,6 +111,7 @@ export const File = {
   columns: [
     '_reference',
     'name',
+    'extension',
     'type',
     'size',
     'temp',
@@ -125,9 +126,18 @@ export const File = {
     'extension',
     'createdAt',
     'updatedAt',
-    '_reference'
+    '_reference',
+    'extension'
+  ],
+  sorters: [
+    'name',
+    'type',
+    'size',
+    'createdAt',
+    'temp',
+    'updatedAt',
+    'extension'
   ],
-  sorters: ['name', 'type', 'size', 'createdAt', 'temp', 'updatedAt'],
   group: ['type'],
   properties: [
     {
@@ -173,13 +183,14 @@ export const File = {
     },
 
     {
-      name: 'type',
+      name: 'extension',
-      label: 'Type',
+      label: 'Extension',
       type: 'text',
       readOnly: true,
       required: true,
-      columnWidth: 190
+      columnWidth: 140
     },
+
     {
       name: 'size',
       label: 'Size',
@@ -222,6 +233,14 @@ export const File = {
       readOnly: true,
       required: false,
       columnWidth: 100
+    },
+    {
+      name: 'type',
+      label: 'Type',
+      type: 'text',
+      readOnly: true,
+      required: true,
+      columnWidth: 190
     }
   ]
 }