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* @fileoverview Control Panel Component for Molecular Dynamics Simulation
* @description Provides UI controls for simulation parameters, atom selection,
* molecule presets, force field selection, and display options.
* @module components/ControlPanel
*/
import { useState } from 'react';
import { useSimulation, useSimulationDispatch } from '../context/SimulationContext';
import { useParameters } from '../context/ParametersContext';
import { ATOM_TYPES as PHYSICS_ATOM_TYPES, MOLECULE_PRESETS } from '../simulation/physics';
import { getAvailableForceFields, getForceFieldInfo } from '../simulation/forceFieldParser';
import { PRESET_CONFIGS } from '../context/simulationReducer';
import './ControlPanel.css';
/**
* UI-friendly atom type representation
* @typedef {Object} UIAtomType
* @property {number} id - Atom type identifier
* @property {string} name - Full element name
* @property {string} symbol - Chemical symbol
* @property {string} color - Display color in hex format
*/
/**
* Convert physics atom types to array for UI rendering
* @type {UIAtomType[]}
*/
const ATOM_TYPES = Object.entries(PHYSICS_ATOM_TYPES).map(([id, data]) => ({
id: parseInt(id, 10),
name: data.name,
symbol: data.symbol,
color: data.color,
}));
/**
* Collapsible Section Component
*/
function CollapsibleSection({ title, icon, children, defaultOpen = false }) {
const [isOpen, setIsOpen] = useState(defaultOpen);
return (
<div className={`collapsible-section ${isOpen ? 'open' : ''}`}>
<button
className="collapsible-header"
onClick={() => setIsOpen(!isOpen)}
aria-expanded={isOpen}
>
<span className="section-icon">{icon}</span>
<span className="section-title">{title}</span>
<span className="chevron">{isOpen ? '▾' : '▸'}</span>
</button>
{isOpen && (
<div className="collapsible-content">
{children}
</div>
)}
</div>
);
}
/**
* Control Panel Component
* Provides UI controls for simulation parameters, atoms, and molecules
* @returns {JSX.Element} Control panel with simulation controls
*/
function ControlPanel() {
const simulation = useSimulation();
const parameters = useParameters();
const dispatch = useSimulationDispatch();
const [selectedForceField, setSelectedForceField] = useState('');
// Combine all atom types into a single categorized list
const organicAtoms = ATOM_TYPES.filter(t => t.id <= 6);
const metalAtoms = ATOM_TYPES.filter(t => t.id > 6);
/**
* Add a single atom at random position within canvas bounds
*/
const handleAddAtom = (atomType) => {
const x = Math.random() * simulation.size.x * 0.6 + simulation.size.x * 0.2;
const y = Math.random() * simulation.size.y * 0.6 + simulation.size.y * 0.2;
dispatch({
type: 'ADD_ATOM',
payload: { x, y, z: 0, atomType }
});
};
/**
* Load a preset molecule configuration
* @param {string} moleculeKey - Key identifying the molecule preset
*/
const handleLoadMolecule = (moleculeKey) => {
const molecule = MOLECULE_PRESETS[moleculeKey];
Eif (molecule) {
dispatch({
type: 'LOAD_MOLECULE',
payload: { atoms: molecule.atoms }
});
}
};
const handleForceFieldChange = (event) => {
const filename = event.target.value;
setSelectedForceField(filename);
if (filename) {
const info = getForceFieldInfo(filename);
dispatch({ type: 'SET_FORCE_FIELD', payload: { filename, info } });
}
};
return (
<div className="control-panel">
<h3>⚙️ Controls</h3>
{/* Quick Actions - Always visible */}
<div className="quick-actions">
<select
className="quick-select"
value=""
onChange={(e) => {
if (e.target.value) {
handleAddAtom(parseInt(e.target.value, 10));
}
}}
title="Add atom"
>
<option value="">➕ Add Atom...</option>
<optgroup label="Elements">
{organicAtoms.map(type => (
<option key={type.id} value={type.id}>
{type.symbol} - {type.name}
</option>
))}
</optgroup>
<optgroup label="Metals">
{metalAtoms.map(type => (
<option key={type.id} value={type.id}>
{type.symbol} - {type.name}
</option>
))}
</optgroup>
</select>
<select
className="quick-select"
value=""
onChange={(e) => {
Eif (e.target.value) {
handleLoadMolecule(e.target.value);
}
}}
title="Add molecule"
>
<option value="">🔬 Add Molecule...</option>
<optgroup label="Common">
{Object.entries(MOLECULE_PRESETS)
.filter(([, mol]) => mol.category === 'common')
.map(([key, mol]) => (
<option key={key} value={key}>{mol.name}</option>
))}
</optgroup>
<optgroup label="Metals">
{Object.entries(MOLECULE_PRESETS)
.filter(([, mol]) => mol.category === 'metals')
.map(([key, mol]) => (
<option key={key} value={key}>{mol.name}</option>
))}
</optgroup>
</select>
</div>
{/* Preset Configurations - Compact buttons */}
<div className="presets-row">
{Object.entries(PRESET_CONFIGS).slice(0, 4).map(([key, preset]) => (
<button
key={key}
className="preset-chip"
onClick={() => {
dispatch({ type: 'PUSH_UNDO' });
dispatch({ type: 'LOAD_PRESET', payload: key });
}}
title={`Load ${preset.name}`}
>
{preset.name.split(' ')[0]}
</button>
))}
</div>
{/* Temperature & Speed - Inline compact */}
<div className="inline-controls">
<div className="inline-control">
<label>🌡️ Temp</label>
<input
type="range"
min="0"
max="1000"
step="10"
value={simulation.targetTemperature}
onChange={(e) => dispatch({
type: 'SET_TARGET_TEMPERATURE',
payload: parseFloat(e.target.value)
})}
/>
<span className="control-value">{simulation.targetTemperature}K</span>
</div>
<div className="inline-control">
<label>⚡ Speed</label>
<input
type="range"
min="0.1"
max="3"
step="0.1"
value={simulation.timeStepMultiplier}
onChange={(e) => dispatch({
type: 'SET_TIME_STEP_MULTIPLIER',
payload: parseFloat(e.target.value)
})}
/>
<span className="control-value">{simulation.timeStepMultiplier.toFixed(1)}x</span>
</div>
</div>
{/* Collapsible Advanced Options */}
<CollapsibleSection title="Force Field" icon="⚛️" defaultOpen={false}>
<select
className="full-select"
value={selectedForceField}
onChange={handleForceFieldChange}
>
<option value="">Select Force Field...</option>
{getAvailableForceFields().map(ff => {
const info = getForceFieldInfo(ff);
return (
<option key={ff} value={ff}>{info.name}</option>
);
})}
</select>
{selectedForceField && (
<div className="force-field-info">
<p>{getForceFieldInfo(selectedForceField).description}</p>
<small>Elements: {getForceFieldInfo(selectedForceField).elements.join(', ')}</small>
</div>
)}
{parameters.isLoaded && (
<div className="params-loaded">✓ ReaxFF loaded</div>
)}
</CollapsibleSection>
<CollapsibleSection title="Boundary & Display" icon="🖼️" defaultOpen={false}>
<div className="compact-control">
<label>Boundary</label>
<select
className="compact-select"
value={simulation.boundaryCondition}
onChange={(e) => dispatch({
type: 'SET_BOUNDARY_CONDITION',
payload: e.target.value
})}
>
<option value="reflective">Reflective</option>
<option value="periodic">Periodic</option>
<option value="open">Open</option>
</select>
</div>
<div className="checkbox-row">
<label className="mini-checkbox">
<input
type="checkbox"
checked={simulation.showBondLengths}
onChange={() => dispatch({ type: 'TOGGLE_BOND_LENGTHS' })}
/>
Bond Lengths
</label>
<label className="mini-checkbox">
<input
type="checkbox"
checked={!simulation.clearScreen}
onChange={() => dispatch({ type: 'TOGGLE' })}
/>
Trails
</label>
</div>
</CollapsibleSection>
<CollapsibleSection title="All Presets" icon="📋" defaultOpen={false}>
<div className="all-presets">
{Object.entries(PRESET_CONFIGS).map(([key, preset]) => (
<button
key={key}
className="preset-btn-full"
onClick={() => {
dispatch({ type: 'PUSH_UNDO' });
dispatch({ type: 'LOAD_PRESET', payload: key });
}}
>
{preset.name}
</button>
))}
</div>
</CollapsibleSection>
</div>
);
}
export default ControlPanel;
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