Abstract Concept Map Generator

An error occurred while generating the map. Please check your data format.

`; } } // --- PDF Download Function --- function downloadPDF() { if (!checkLibraries()) { alert('Error: PDF generation libraries are not loaded.'); return; } if (network === null) { alert('Please generate a map first before downloading.'); return; } // Get the main visualization const captureElement = graphContainer.querySelector('canvas'); if (!captureElement) { alert('Error: Could not find map canvas to capture.'); return; } // Show a temporary message const originalBtnText = pdfDownloadBtn.textContent; pdfDownloadBtn.textContent = 'Generating...'; pdfDownloadBtn.disabled = true; try { // Use html2canvas to capture the element html2canvas(captureElement, { useCORS: true, backgroundColor: '#ffffff', // Force white background onrendered: function(canvas) { // Fallback for older html2canvas versions console.warn("html2canvas onrendered fallback used"); } }).then((canvas) => { const imgData = canvas.toDataURL('image/png'); const { jsPDF } = window.jspdf; // Create PDF const doc = new jsPDF({ orientation: 'landscape', unit: 'px', format: [canvas.width, canvas.height] // Use canvas dimensions }); doc.text("Abstract Concept Map", 20, 30); doc.addImage(imgData, 'PNG', 0, 0, canvas.width, canvas.height); doc.save('concept_map.pdf'); // Restore button pdfDownloadBtn.textContent = originalBtnText; pdfDownloadBtn.disabled = false; }).catch(err => { console.error('CONCEPT MAP TOOL: html2canvas error:', err); alert('An error occurred during PDF generation.'); pdfDownloadBtn.textContent = originalBtnText; pdfDownloadBtn.disabled = false; }); } catch (e) { console.error('CONCEPT MAP TOOL: PDF generation failed.', e); alert('Error: Could not generate PDF.'); pdfDownloadBtn.textContent = originalBtnText; pdfDownloadBtn.disabled = false; } } // --- Attach Event Listeners --- generateBtn.addEventListener('click', generateMap); pdfDownloadBtn.addEventListener('click', downloadPDF); // --- Initial Setup --- updateNavButtons(); checkLibraries(); });