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🎨 Palette: Add loading state to Generate button #20

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🎨 Palette: Add loading state to Generate button #20

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5 changes: 4 additions & 1 deletion web_app/static/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -116,7 +116,10 @@ <h2 id="contentHeading">Lyrics</h2>
</div>
</div>

<button id="generateBtn" class="primary-btn">Generate Poster</button>
<button id="generateBtn" class="primary-btn">
<span class="btn-text">Generate Poster</span>
<div class="spinner"></div>
</button>
</div>
</div>

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24 changes: 18 additions & 6 deletions web_app/static/script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -613,7 +613,8 @@ function handleLyricLineClick(lineNumber) {
async function generatePoster() {
if (!currentMetadata) return;

loadingOverlay.style.display = 'flex';
generateBtn.disabled = true;
generateBtn.classList.add('loading');

const indexingToggle = document.getElementById('indexingToggle');
const accentToggle = document.getElementById('accentToggle');
Expand All @@ -635,7 +636,8 @@ async function generatePoster() {
const end = endVal;

if (isNaN(start) || isNaN(end) || start >= end) {
loadingOverlay.style.display = 'none';
generateBtn.disabled = false;
generateBtn.classList.remove('loading');
showToast("Please enter a valid range (Start must be less than End).", "error");
return;
}
Expand All @@ -651,7 +653,9 @@ async function generatePoster() {
try {
const response = await fetch('/api/generate', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify(payload)
});

Expand All @@ -663,19 +667,27 @@ async function generatePoster() {
const data = await response.json();
const imageUrl = data.is_base64 ? data.image_data : `${data.image_url}?t=${new Date().getTime()}`;

const img = document.createElement('img');
const img = new Image();
img.src = imageUrl;

img.onload = () => {
posterContainer.innerHTML = '';
posterContainer.appendChild(img);
showDownloadButton(imageUrl, data.filename);
loadingOverlay.style.display = 'none';
generateBtn.disabled = false;
generateBtn.classList.remove('loading');
};
img.onerror = () => {
showToast('Error: Failed to load the generated poster image.', 'error');
generateBtn.disabled = false;
generateBtn.classList.remove('loading');
};

} catch (error) {
console.error("Generation failed", error);
showToast(`Error: ${error.message}`, "error");
loadingOverlay.style.display = 'none';
generateBtn.disabled = false;
generateBtn.classList.remove('loading');
}
}

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31 changes: 30 additions & 1 deletion web_app/static/style.css
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Original file line number Diff line number Diff line change
Expand Up @@ -161,11 +161,40 @@ header p {
width: 100%;
}

.primary-btn:hover {
.primary-btn:hover:not(:disabled) {
background: var(--accent-hover);
transform: translateY(-1px);
}

.primary-btn:disabled,
.primary-btn.loading {
background: var(--accent-hover);
cursor: not-allowed;
transform: none;
opacity: 0.7;
}

.primary-btn .spinner {
display: none;
}

.primary-btn.loading .btn-text {
display: none;
}

.primary-btn.loading .spinner {
display: block;
width: 20px;
height: 20px;
border-width: 2px;
border-style: solid;
border-color: rgba(0, 0, 0, 0.2);
border-top-color: #1a1a1f;
margin-bottom: 0;
border-radius: 50%;
animation: spin 0.8s linear infinite;
}

.secondary-btn {
background: transparent;
border-color: var(--border-color);
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