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🎨 Palette: Add loading state to Generate Poster button #25

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🎨 Palette: Add loading state to Generate Poster button #25

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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 btn-spinner" style="display: none;"></div>
</button>
</div>
</div>

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19 changes: 16 additions & 3 deletions web_app/static/script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -613,7 +613,15 @@ function handleLyricLineClick(lineNumber) {
async function generatePoster() {
if (!currentMetadata) return;

loadingOverlay.style.display = 'flex';
// -- UX Enhancement: Button Loading State --
const btnText = generateBtn.querySelector('.btn-text');
const btnSpinner = generateBtn.querySelector('.btn-spinner');

generateBtn.disabled = true;
btnText.style.display = 'none';
btnSpinner.style.display = 'block';
generateBtn.setAttribute('aria-label', 'Generating poster, please wait.');
// -- End UX Enhancement --

const indexingToggle = document.getElementById('indexingToggle');
const accentToggle = document.getElementById('accentToggle');
Expand Down Expand Up @@ -669,13 +677,18 @@ async function generatePoster() {
posterContainer.innerHTML = '';
posterContainer.appendChild(img);
showDownloadButton(imageUrl, data.filename);
loadingOverlay.style.display = 'none';
};

} catch (error) {
console.error("Generation failed", error);
showToast(`Error: ${error.message}`, "error");
loadingOverlay.style.display = 'none';
} finally {
// -- UX Enhancement: Reset Button State --
generateBtn.disabled = false;
btnText.style.display = 'block';
btnSpinner.style.display = 'none';
generateBtn.removeAttribute('aria-label');
// -- End UX Enhancement --
}
}

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13 changes: 13 additions & 0 deletions web_app/static/style.css
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Original file line number Diff line number Diff line change
Expand Up @@ -166,6 +166,19 @@ header p {
transform: translateY(-1px);
}

.primary-btn:disabled {
background: var(--accent-hover);
cursor: not-allowed;
opacity: 0.7;
}

.btn-spinner {
width: 20px;
height: 20px;
border-width: 2px;
margin: 0;
}

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