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<html lang="en" data-bs-theme="dark">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
<title>Adjust & Enhance</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css">
<style>
:root {
--header-height: 56px;
--point-size: 28px;
--loupe-size: 100px;
}
html, body { height: 100%; overflow: hidden; }
.main-container { display: flex; flex-direction: column; height: 100vh; }
.app-header { height: var(--header-height); flex-shrink: 0; display: flex; align-items: center; padding: 0 1rem; background: #2c3034; border-bottom: 1px solid #495057; }
.content-wrapper { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.image-pane { flex: 1; min-height: 0; position: relative; background: #181a1c; display: flex; align-items: center; justify-content: center; padding: 0.5rem; }
.controls-pane { flex-shrink: 0; background: #212529; border-top: 1px solid #495057; display: flex; flex-direction: column; overflow: hidden; }
.controls-content { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 1rem; }
.action-buttons { padding: 1rem; border-top: 1px solid #495057; flex-shrink: 0; }
#crop-area { position: relative; touch-action: none; line-height: 0; }
#main-image { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; }
#boundary-canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 5; }
.control-point { position: absolute; width: var(--point-size); height: var(--point-size); transform: translate(-50%, -50%); cursor: pointer; z-index: 10; }
.corner-point { background: #0d6efd; border: 3px solid white; border-radius: 50%; box-shadow: 0 0 15px rgba(13, 110, 253, 0.7); }
.edge-point { background: white; border: 3px solid #0d6efd; border-radius: 6px; }
.magnifier { display: none; position: fixed; width: var(--loupe-size); height: var(--loupe-size); border-radius: 50%; border: 3px solid #0d6efd; overflow: hidden; pointer-events: none; z-index: 1000; box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6); }
.magnifier-image { position: absolute; transform-origin: top left; }
.magnifier-crosshair { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.magnifier-crosshair::before, .magnifier-crosshair::after { content: ''; position: absolute; background: #ffc107; }
.magnifier-crosshair::before { left: 50%; width: 2px; height: 100%; transform: translateX(-50%); }
.magnifier-crosshair::after { top: 50%; height: 2px; width: 100%; transform: translateY(-50%); }
.presets-scroll { display: flex; gap: 0.75rem; overflow-x: auto; padding-bottom: 10px; }
.preset-item { flex-shrink: 0; text-align: center; cursor: pointer; }
.preset-image { width: 60px; height: 60px; object-fit: cover; border-radius: 8px; border: 2px solid #495057; }
.preset-label { font-size: 0.75rem; margin-top: 0.25rem; color: #adb5bd; }
.preset-item.active .preset-image { border-color: #0d6efd; }
.preset-item.active .preset-label { color: #0d6efd; font-weight: 600; }
.control-label { font-size: 0.875rem; margin-bottom: 0.5rem; }
.btn-mobile { height: 48px; font-weight: 500; border-radius: 8px; }
.status-message { position: fixed; top: var(--header-height); left: 1rem; right: 1rem; z-index: 1050; }
@media (max-height: 700px) { .controls-pane { height: 280px; } }
@media (min-height: 701px) { .controls-pane { height: 40vh; } }
@media (min-width: 992px) {
:root { --point-size: 24px; --loupe-size: 120px; }
.content-wrapper { flex-direction: row; }
.image-pane { flex: 1; min-width: 0; }
.controls-pane { width: 320px; height: auto; border-top: none; border-left: 1px solid #495057; }
}
</style>
</head>
<body>
<div class="main-container">
<header class="app-header"><h5 class="mb-0 text-white"><i class="bi bi-crop me-2"></i>Adjust & Enhance</h5></header>
<div class="content-wrapper">
<div class="image-pane" id="imagePane">
<div id="crop-area">
<img id="main-image" src="/image/upload/{{ image_info.filename }}" alt="Image to adjust">
<canvas id="boundary-canvas"></canvas>
</div>
</div>
<div class="controls-pane">
<div class="controls-content">
<h6 class="text-white mb-2">Quick Presets</h6>
<div class="presets-scroll" id="presetsContainer"></div>
<hr class="my-3">
<h6 class="text-white mb-3">Manual Adjustments</h6>
<div class="mb-3"><label for="brightness" class="control-label">Brightness <span id="brightnessValue">0</span></label><input type="range" class="form-range" id="brightness" min="-100" max="100" value="0" step="5"></div>
<div class="mb-3"><label for="contrast" class="control-label">Contrast <span id="contrastValue">1.0</span></label><input type="range" class="form-range" id="contrast" min="0.5" max="2.5" value="1.0" step="0.05"></div>
<div class="mb-3"><label for="gamma" class="control-label">Gamma <span id="gammaValue">1.0</span></label><input type="range" class="form-range" id="gamma" min="0.2" max="2.2" value="1.0" step="0.1"></div>
</div>
<div class="action-buttons">
<button id="processBtn" class="btn btn-primary w-100 btn-mobile mb-2"><i class="bi bi-check-lg me-2"></i>Save and Continue</button>
<button id="skipBtn" class="btn btn-outline-secondary w-100 btn-mobile"><i class="bi bi-skip-forward me-2"></i>Skip This Image</button>
</div>
</div>
</div>
<div class="magnifier" id="magnifier"><img class="magnifier-image" id="magnifier-image" src="/image/upload/{{ image_info.filename }}"><div class="magnifier-crosshair"></div></div>
<div id="statusContainer"></div>
</div>
<script>
// --- DOM ELEMENT REFERENCES ---
const image = document.getElementById('main-image');
const imagePane = document.getElementById('imagePane');
const cropArea = document.getElementById('crop-area');
const canvas = document.getElementById('boundary-canvas');
const ctx = canvas.getContext('2d');
const magnifier = document.getElementById('magnifier');
const magnifierImage = document.getElementById('magnifier-image');
const brightnessSlider = document.getElementById('brightness');
const contrastSlider = document.getElementById('contrast');
const gammaSlider = document.getElementById('gamma');
// --- GLOBAL STATE ---
const sessionId = '{{ session_id }}';
const imageIndex = parseInt('{{ image_index }}');
const points = {};
let activePoint = null;
let isInitialized = false;
const PRESETS = [ { name: 'Original', settings: { brightness: 0, contrast: 1.0, gamma: 1.0 }, filter: 'none' }, { name: 'Document', settings: { brightness: 10, contrast: 1.5, gamma: 0.8 }, filter: 'contrast(1.4) brightness(1.1)' }, { name: 'Grayscale', settings: { brightness: 0, contrast: 1.2, gamma: 1.0 }, filter: 'grayscale(100%) contrast(1.2)' }, { name: 'High Contrast', settings: { brightness: 5, contrast: 2.0, gamma: 0.7 }, filter: 'contrast(1.8) brightness(1.05)' }, { name: 'Vivid', settings: { brightness: 0, contrast: 1.2, gamma: 1.0 }, filter: 'saturate(1.5) contrast(1.1)' }];
// --- CORE INITIALIZATION (THE FIX) ---
function initializeApp() {
if (!image.naturalWidth) return; // Wait for the image to have dimensions
// This function runs whenever the container is resized or the image loads.
// It sets up the workspace dimensions.
const setupWorkspace = () => {
const paneAspectRatio = imagePane.clientWidth / imagePane.clientHeight;
const imageAspectRatio = image.naturalWidth / image.naturalHeight;
let width, height;
if (imageAspectRatio > paneAspectRatio) {
width = imagePane.clientWidth;
height = width / imageAspectRatio;
} else {
height = imagePane.clientHeight;
width = height * imageAspectRatio;
}
cropArea.style.width = `${width}px`;
cropArea.style.height = `${height}px`;
canvas.width = width;
canvas.height = height;
updateAllPoints();
};
// Run it once to set initial size
setupWorkspace();
// The first time this runs, create everything
if (!isInitialized) {
createPoints();
setupPresets();
loadSettings();
setupActionListeners();
isInitialized = true;
}
// Listen for future resizes
new ResizeObserver(setupWorkspace).observe(imagePane);
}
// --- POINT CREATION AND DRAGGING ---
function createPoints() {
const pointDefs = {
tl: { x: 0.1, y: 0.1, type: 'corner' },
tm: { x: 0.5, y: 0.1, type: 'edge', axis: 'horizontal', neighbors: ['tl', 'tr'] },
tr: { x: 0.9, y: 0.1, type: 'corner' },
ml: { x: 0.1, y: 0.5, type: 'edge', axis: 'vertical', neighbors: ['tl', 'bl'] },
mr: { x: 0.9, y: 0.5, type: 'edge', axis: 'vertical', neighbors: ['tr', 'br'] },
bl: { x: 0.1, y: 0.9, type: 'corner' },
bm: { x: 0.5, y: 0.9, type: 'edge', axis: 'horizontal', neighbors: ['bl', 'br'] },
br: { x: 0.9, y: 0.9, type: 'corner' }
};
Object.entries(pointDefs).forEach(([name, def]) => {
const pointEl = document.createElement('div');
pointEl.className = `control-point ${def.type}-point`;
cropArea.appendChild(pointEl);
points[name] = { ...def, element: pointEl };
pointEl.addEventListener('mousedown', (e) => startDrag(e, name));
pointEl.addEventListener('touchstart', (e) => startDrag(e, name));
});
}
function startDrag(e, pointName) {
e.preventDefault(); e.stopPropagation();
activePoint = pointName;
magnifier.style.display = 'block';
const dragStartPositions = Object.entries(points).reduce((acc, [name, data]) => {
acc[name] = { x: data.x, y: data.y }; return acc;
}, {});
const handleDrag = (e) => {
if (!activePoint) return;
e.preventDefault();
const touch = e.touches ? e.touches[0] : e;
const rect = cropArea.getBoundingClientRect();
const normalizedX = (touch.clientX - rect.left) / rect.width;
const normalizedY = (touch.clientY - rect.top) / rect.height;
const point = points[activePoint];
const startPos = dragStartPositions[activePoint];
let dx = normalizedX - startPos.x;
let dy = normalizedY - startPos.y;
if (point.type === 'edge') {
if (point.axis === 'horizontal') dx = 0;
if (point.axis === 'vertical') dy = 0;
point.neighbors.forEach(name => {
const neighborStart = dragStartPositions[name];
points[name].x = neighborStart.x + dx;
points[name].y = neighborStart.y + dy;
});
} else if (point.type === 'corner') {
point.x = normalizedX;
point.y = normalizedY;
}
recalculateEdgePoints();
updateAllPoints();
updateMagnifier(touch.clientX, touch.clientY);
};
const endDrag = () => {
activePoint = null; magnifier.style.display = 'none';
document.removeEventListener('mousemove', handleDrag);
document.removeEventListener('touchmove', handleDrag);
document.removeEventListener('mouseup', endDrag);
document.removeEventListener('touchend', endDrag);
};
document.addEventListener('mousemove', handleDrag);
document.addEventListener('touchmove', handleDrag, { passive: false });
document.addEventListener('mouseup', endDrag);
document.addEventListener('touchend', endDrag);
}
function recalculateEdgePoints() {
const { tl, tr, bl, br, tm, bm, ml, mr } = points;
tm.x = (tl.x + tr.x) / 2; tm.y = (tl.y + tr.y) / 2;
bm.x = (bl.x + br.x) / 2; bm.y = (bl.y + br.y) / 2;
ml.x = (tl.x + bl.x) / 2; ml.y = (tl.y + bl.y) / 2;
mr.x = (tr.x + br.x) / 2; mr.y = (tr.y + br.y) / 2;
}
// --- VISUALS ---
function updateAllPoints() {
if (Object.keys(points).length === 0) return;
Object.values(points).forEach(point => {
point.element.style.left = `${point.x * 100}%`;
point.element.style.top = `${point.y * 100}%`;
});
drawBoundary();
}
function drawBoundary() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.strokeStyle = 'rgba(13, 110, 253, 0.9)';
ctx.fillStyle = 'rgba(13, 110, 253, 0.15)';
ctx.lineWidth = 2;
const p = (pt) => ({ x: pt.x * canvas.width, y: pt.y * canvas.height });
const { tl, tm, tr, mr, br, bm, bl, ml } = points;
ctx.beginPath();
ctx.moveTo(p(tl).x, p(tl).y); ctx.lineTo(p(tm).x, p(tm).y); ctx.lineTo(p(tr).x, p(tr).y); ctx.lineTo(p(mr).x, p(mr).y);
ctx.lineTo(p(br).x, p(br).y); ctx.lineTo(p(bm).x, p(bm).y); ctx.lineTo(p(bl).x, p(bl).y); ctx.lineTo(p(ml).x, p(ml).y);
ctx.closePath(); ctx.fill(); ctx.stroke();
}
function updateMagnifier(clientX, clientY) {
const loupeSize = magnifier.clientWidth;
magnifier.style.left = `${clientX - (loupeSize / 2)}px`;
magnifier.style.top = `${clientY - loupeSize - 20}px`;
const rect = cropArea.getBoundingClientRect();
const normalizedX = (clientX - rect.left) / rect.width;
const normalizedY = (clientY - rect.top) / rect.height;
magnifierImage.style.transform = `scale(${2.5})`;
magnifierImage.style.left = `${-normalizedX * rect.width * 2.5 + (loupeSize / 2)}px`;
magnifierImage.style.top = `${-normalizedY * rect.height * 2.5 + (loupeSize / 2)}px`;
}
// --- SETTINGS AND PRESETS ---
function setupActionListeners() {
[brightnessSlider, contrastSlider, gammaSlider].forEach(slider => slider.addEventListener('input', updateImageFilters));
document.getElementById('processBtn').addEventListener('click', processImage);
document.getElementById('skipBtn').addEventListener('click', skipImage);
brightnessSlider.addEventListener('input', (e) => { document.getElementById('brightnessValue').textContent = e.target.value; });
contrastSlider.addEventListener('input', (e) => { document.getElementById('contrastValue').textContent = parseFloat(e.target.value).toFixed(1); });
gammaSlider.addEventListener('input', (e) => { document.getElementById('gammaValue').textContent = parseFloat(e.target.value).toFixed(1); });
}
function setupPresets() {
const presetsContainer = document.getElementById('presetsContainer');
presetsContainer.innerHTML = '';
PRESETS.forEach(preset => {
const presetEl = document.createElement('div');
presetEl.className = 'preset-item';
presetEl.dataset.name = preset.name;
presetEl.innerHTML = `<img class="preset-image" src="${image.src}" style="filter: ${preset.filter};" alt="${preset.name}"><span class="preset-label">${preset.name}</span>`;
presetEl.addEventListener('click', () => applyPreset(preset, presetEl));
presetsContainer.appendChild(presetEl);
});
}
function applyPreset(preset, element) {
brightnessSlider.value = preset.settings.brightness;
contrastSlider.value = preset.settings.contrast;
gammaSlider.value = preset.settings.gamma;
document.getElementById('brightnessValue').textContent = preset.settings.brightness;
document.getElementById('contrastValue').textContent = preset.settings.contrast.toFixed(1);
document.getElementById('gammaValue').textContent = preset.settings.gamma.toFixed(1);
image.style.filter = preset.filter;
document.querySelectorAll('.preset-item').forEach(el => el.classList.remove('active'));
if (element) element.classList.add('active');
}
function updateImageFilters() {
const brightness = 1 + parseFloat(brightnessSlider.value) / 100;
const contrast = parseFloat(contrastSlider.value);
image.style.filter = `brightness(${brightness}) contrast(${contrast})`;
const matchingPreset = PRESETS.find(p => p.settings.brightness == brightnessSlider.value && p.settings.contrast == contrastSlider.value && p.settings.gamma == gammaSlider.value);
document.querySelectorAll('.preset-item').forEach(el => el.classList.remove('active'));
if (matchingPreset) { const presetEl = document.querySelector(`[data-name="${matchingPreset.name}"]`); if (presetEl) presetEl.classList.add('active'); }
}
function saveSettings() { const settings = { brightness: parseFloat(brightnessSlider.value), contrast: parseFloat(contrastSlider.value), gamma: parseFloat(gammaSlider.value), activePreset: document.querySelector('.preset-item.active')?.dataset.name || 'Custom' }; try { localStorage.setItem('cropToolSettings', JSON.stringify(settings)); } catch (e) { console.warn('Could not save settings:', e); } }
function loadSettings() { try { const savedSettings = JSON.parse(localStorage.getItem('cropToolSettings') || '{}'); if (savedSettings.brightness !== undefined) { brightnessSlider.value = savedSettings.brightness; document.getElementById('brightnessValue').textContent = savedSettings.brightness; } if (savedSettings.contrast !== undefined) { contrastSlider.value = savedSettings.contrast; document.getElementById('contrastValue').textContent = savedSettings.contrast.toFixed(1); } if (savedSettings.gamma !== undefined) { gammaSlider.value = savedSettings.gamma; document.getElementById('gammaValue').textContent = savedSettings.gamma.toFixed(1); } updateImageFilters(); if (savedSettings.activePreset && savedSettings.activePreset !== 'Custom') { const presetEl = document.querySelector(`[data-name="${savedSettings.activePreset}"]`); if (presetEl) presetEl.classList.add('active'); } } catch (e) { console.warn('Could not load settings:', e); } }
// --- SERVER COMMUNICATION ---
function showStatus(message, type = 'info') { const statusContainer = document.getElementById('statusContainer'); statusContainer.innerHTML = `<div class="alert alert-${type} alert-dismissible fade show status-message" role="alert">${message}<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button></div>`; if (type !== 'info') { setTimeout(() => { const alert = statusContainer.querySelector('.alert'); if(alert) alert.classList.remove('show'); }, 3000); } }
async function processImage() {
try {
showStatus('<i class="bi bi-hourglass-split me-2"></i>Processing image...', 'info');
saveSettings();
const { tl, tr, br, bl } = points;
const pointsToSend = [tl, tr, br, bl].map(p => ({ x: p.x, y: p.y }));
const adjustments = { brightness: parseFloat(brightnessSlider.value), contrast: parseFloat(contrastSlider.value), gamma: parseFloat(gammaSlider.value) };
const response = await fetch('/process_crop', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ session_id: sessionId, image_index: imageIndex, points: pointsToSend, adjustments: adjustments }) });
const result = await response.json();
if (result.error) throw new Error(result.error);
showStatus('<i class="bi bi-check-circle me-2"></i>Image processed!', 'success');
setTimeout(navigateNext, 1000);
} catch (error) { showStatus(`<i class="bi bi-exclamation-triangle me-2"></i>Error: ${error.message}`, 'danger'); }
}
async function navigateNext() { try { const nextUrl = `/crop/${sessionId}/${imageIndex + 1}`; const res = await fetch(nextUrl); window.location.href = res.ok ? nextUrl : `/question_entry/${sessionId}`; } catch (error) { window.location.href = `/question_entry/${sessionId}`; } }
function skipImage() { showStatus('<i class="bi bi-skip-forward me-2"></i>Skipping...', 'info'); setTimeout(navigateNext, 500); }
// --- GLOBAL EVENT LISTENERS ---
if (image.complete) {
initializeApp();
} else {
image.addEventListener('load', initializeApp);
}
</script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</body>
</html>
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