Panel Components

The AI-BIM App uses several panel components built with @thatopen/ui to organize and display information in the application interface. Panels are integrated into the left sidebar using a tabbed layout.

Panel Architecture

Panels are created using BUI.Component.create<BUI.Panel>() and structured with <bim-panel-section> elements. Each panel section can contain tables, forms, buttons, and other UI components.

Integration in main.ts

const leftPanel = BUI.Component.create(() => {
  return BUI.html`
    <bim-tabs switchers-full>
      <bim-tab name="project" label="Project" icon="ph:building-fill">
        ${projectInformationPanel}
      </bim-tab>
      <bim-tab name="settings" label="Settings" icon="solar:settings-bold">
        ${settings(components)}
      </bim-tab>
      <bim-tab name="help" label="Help" icon="material-symbols:help">
        ${help}
      </bim-tab>
    </bim-tabs> 
  `;
});

Reference: main.ts:160-174

Project Information Panel

Source: src/components/Panels/ProjectInformation.ts Displays loaded BIM models and provides AI/Chart analysis tools.

Structure

export default (components: OBC.Components) => {
  const [modelsList] = CUI.tables.modelsList({ components });
  const [relationsTree] = CUI.tables.relationsTree({
    components,
    models: [],
    hoverHighlighterName: "hover",
    selectHighlighterName: "select",
  });
  
  return BUI.Component.create<BUI.Panel>(() => {
    return BUI.html`
      <bim-panel>
        <bim-panel-section label="Loaded Models" icon="mage:box-3d-fill">
          ${modelsList}
        </bim-panel-section>
        <bim-panel-section label="AI / CHART" icon="mage:box-3d-fill">
          ${ModalDataUI(components)}
          ${ChartUI(components)}
        </bim-panel-section>
      </bim-panel> 
    `;
  });
};

Features

Models List Table: Displays all loaded IFC models with management controls
Relations Tree: Shows IFC spatial structure with filtering capabilities (preserveStructureOnFilter: true)
AI Integration: Modal interface for AI-powered analysis (ChatGPT integration)
Chart Visualization: Data visualization tools for BIM analytics

Components Used

CUI.tables.modelsList() - Pre-built table for model management
CUI.tables.relationsTree() - IFC spatial hierarchy tree
ModalDataUI() - Custom AI chat interface
ChartUI() - Custom charting component

Selection Panel (Element Data)

Source: src/components/Panels/Selection.ts Displays properties and attributes of selected BIM elements. Dynamically appears when elements are selected.

Structure

export default (components: OBC.Components) => {
  const fragments = components.get(OBC.FragmentsManager);
  const highlighter = components.get(OBF.Highlighter);
  const appManager = components.get(AppManager);
  const viewportGrid = appManager.grids.get("viewport");

  const [propsTable, updatePropsTable] = CUI.tables.elementProperties({
    components,
    fragmentIdMap: {},
  });

  propsTable.preserveStructureOnFilter = true;
  
  return BUI.Component.create<BUI.Panel>(() => {
    return BUI.html`
      <bim-panel>
        <bim-panel-section name="selection" label="Selection Information" 
                          icon="solar:document-bold" fixed>
          <div style="display: flex; gap: 0.375rem;">
            <bim-text-input @input=${search} vertical 
                           placeholder="Search..." debounce="200">
            </bim-text-input>
            <bim-button @click=${toggleExpanded} 
                       icon="eva:expand-fill">
            </bim-button>
            <bim-button @click=${() => propsTable.downloadData("ElementData", "tsv")} 
                       icon="ph:export-fill" 
                       tooltip-title="Export Data" 
                       tooltip-text="Export the shown properties to TSV.">
            </bim-button>
          </div>
          ${propsTable}
        </bim-panel-section>
      </bim-panel> 
    `;
  });
};

Dynamic Behavior

The panel automatically shows/hides based on selection state:

highlighter.events.select.onHighlight.add((fragmentIdMap) => {
  if (!viewportGrid) return;
  viewportGrid.layout = "second"; // Show element data panel
  propsTable.expanded = false;
  updatePropsTable({ fragmentIdMap });
});

highlighter.events.select.onClear.add(() => {
  updatePropsTable({ fragmentIdMap: {} });
  if (!viewportGrid) return;
  viewportGrid.layout = "main"; // Hide element data panel
});

Reference: Selection.ts:21-32

Features

Properties Table: Displays all IFC properties of selected elements
Search Functionality: Filter properties with 200ms debounce
Expand/Collapse: Toggle full property tree expansion
Export: Download element data as TSV format
Auto-cleanup: Clears on fragment disposal

Integration

The panel is rendered in the viewport grid’s “second” layout:

viewportGrid.layouts = {
  main: {
    template: `
      "empty" 1fr
      "toolbar" auto
      /1fr
    `,
    elements: { toolbar },
  },
  second: {
    template: `
      "empty elementDataPanel" 1fr
      "toolbar elementDataPanel" auto
      /1fr 24rem
    `,
    elements: {
      toolbar,
      elementDataPanel,
    },
  },
};

Reference: main.ts:192-212

Settings Panel

Source: src/components/Panels/Settings.ts Provides application configuration options including theme selection and world settings.

Structure

export default (components: OBC.Components) => {
  const html = document.querySelector("html")!;
  const [worldsTable] = CUI.tables.worldsConfiguration({ components });
  
  return BUI.Component.create<BUI.Panel>(() => {
    return BUI.html`
      <bim-panel>
        <bim-panel-section label="Aspect" icon="mage:box-3d-fill">
          <bim-selector vertical @change=${onThemeChange}>
            <bim-option value="0" label="System" icon="majesticons:laptop">
            </bim-option>
            <bim-option value="1" label="Dark" icon="solar:moon-bold">
            </bim-option>
            <bim-option value="2" label="Light" icon="solar:sun-bold">
            </bim-option>
          </bim-selector>
        </bim-panel-section>
        <bim-panel-section label="Worlds" icon="tabler:world">
          <bim-text-input @input=${onWorldConfigSearch} 
                         vertical placeholder="Search..." debounce="200">
          </bim-text-input>
          <bim-button @click=${() => (worldsTable.expanded = !worldsTable.expanded)} 
                     icon="eva:expand-fill">
          </bim-button>
          ${worldsTable}
        </bim-panel-section>
      </bim-panel> 
    `;
  });
};

Theme Management

const onThemeChange = (event: Event) => {
  const selector = event.target as BUI.Selector;
  if (selector.value === 0) {
    html.classList.remove("bim-ui-dark", "bim-ui-light"); // System
  } else if (selector.value === 1) {
    html.className = "bim-ui-dark"; // Dark mode
  } else if (selector.value === 2) {
    html.className = "bim-ui-light"; // Light mode
  }
};

Reference: Settings.ts:7-20

Features

Theme Selector: System, Dark, or Light mode with persistent UI classes
Worlds Configuration: Table displaying all 3D world settings
Search Worlds: Filter world configuration options
Expand/Collapse: Toggle world settings table expansion

Components Used

<bim-selector> - Radio button group for theme selection
CUI.tables.worldsConfiguration() - Pre-built worlds config table
<bim-text-input> - Debounced search input (200ms)

Help Panel

Source: src/components/Panels/Help.ts Provides links to That Open Company community and educational resources.

Structure

export default BUI.Component.create<BUI.Panel>(() => {
  return BUI.html`
    <bim-panel>
      <bim-panel-section fixed label="That Open People at your disposal" 
                        icon="ic:baseline-people">
        <bim-label style="white-space: normal;">
          Feel stuck? Within our community, That Open People, you'll find 
          all the answers to your doubts...
        </bim-label>
        <bim-button @click=${() => open("https://people.thatopen.com/")} 
                   label="Meet That Open People" 
                   icon="ic:baseline-people">
        </bim-button>
      </bim-panel-section>
      
      <bim-panel-section fixed label="Become a BIM Software Developer" 
                        icon="mdi:university">
        <bim-label style="white-space: normal;">
          Want a career change? Enter this new market full of opportunities!...
        </bim-label>
        <bim-button @click=${() => open("https://thatopen.com/master")} 
                   label="Join To Master" 
                   icon="mdi:university">
        </bim-button>
      </bim-panel-section>
      
      <bim-panel-section fixed label="Get The Code and Boost your Career" 
                        icon="material-symbols:code">
        <bim-label style="white-space: normal;">
          Eager to succeed? Sign up for Get The Code...
        </bim-label>
        <bim-button @click=${() => open("https://thatopen.com/get-the-code")} 
                   label="Get The Code" 
                   icon="material-symbols:code">
        </bim-button>
      </bim-panel-section>
    </bim-panel>
  `;
});

Features

Static Content: Fixed panel sections with informational content
External Links: Opens That Open Company resources in new windows
Community Resources: Link to That Open People community
Educational Programs: Links to Master course and Get The Code membership

Design Notes

Uses fixed attribute on panel sections for consistent layout
white-space: normal on labels allows text wrapping
Each section includes descriptive icon and call-to-action button

Panel Common Patterns

Panel Section Structure

<bim-panel-section 
  label="Section Title" 
  icon="icon-name" 
  fixed={optional}>
  {content}
</bim-panel-section>

Search Pattern

Most panels implement debounced search:

const search = (e: Event) => {
  const input = e.target as BUI.TextInput;
  table.queryString = input.value;
};

// In template:
<bim-text-input @input=${search} placeholder="Search..." debounce="200">
</bim-text-input>

Table Expansion Pattern

const toggleExpanded = () => {
  table.expanded = !table.expanded;
};

// In template:
<bim-button @click=${toggleExpanded} icon="eva:expand-fill"></bim-button>

Best Practices

Preserve Structure: Set preserveStructureOnFilter = true on tables to maintain hierarchy during search
Debouncing: Use 200ms debounce on search inputs to avoid excessive filtering
Event Cleanup: Remove event listeners when panels are disposed
Responsive Layout: Use flex containers with gap spacing for consistent UI
Icon Consistency: Use semantic icons that match panel function

Components

UI Components

Panel Architecture

Integration in main.ts

Project Information Panel

Structure

Features

Components Used

Selection Panel (Element Data)

Structure

Dynamic Behavior

Features

Integration

Settings Panel

Structure

Theme Management

Features

Components Used

Help Panel

Structure

Features

Design Notes

Panel Common Patterns

Panel Section Structure

Search Pattern

Table Expansion Pattern

Best Practices

See Also

Build docs developers (and LLMs) love

Components

UI Components

Documentation Index

​Panel Architecture

​Integration in main.ts

​Project Information Panel

​Structure

​Features

​Components Used

​Selection Panel (Element Data)

​Structure

​Dynamic Behavior

​Features

​Integration

​Settings Panel

​Structure

​Theme Management

​Features

​Components Used

​Help Panel

​Structure

​Features

​Design Notes

​Panel Common Patterns

​Panel Section Structure

​Search Pattern

​Table Expansion Pattern

​Best Practices

​See Also

Build docs developers (and LLMs) love

Panel Architecture

Integration in main.ts

Project Information Panel

Structure

Features

Components Used

Selection Panel (Element Data)

Structure

Dynamic Behavior

Features

Integration

Settings Panel

Structure

Theme Management

Features

Components Used

Help Panel

Structure

Features

Design Notes

Panel Common Patterns

Panel Section Structure

Search Pattern

Table Expansion Pattern

Best Practices

See Also