notif actions rework

Plugins/ZShell/Components/buttonrow.cpp

@@ -0,0 +1,132 @@
+#include "buttonrow.hpp"
+
+namespace ZShell::components {
+
+ButtonRow::ButtonRow(QQuickItem* parent)
+	: QQuickItem(parent)
+	, m_dirty(false)
+	, m_spacing(0.0) {
+	setFlag(QQuickItem::ItemHasContents, true);
+	QObject::connect(this, &ButtonRow::widthChanged, this, &ButtonRow::invalidate);
+}
+
+qreal ButtonRow::spacing() const {
+	return m_spacing;
+}
+
+void ButtonRow::setSpacing(qreal spacing) {
+	if (qFuzzyCompare(m_spacing + 1.0, spacing + 1.0))
+		return;
+
+	m_spacing = spacing;
+	emit spacingChanged();
+
+	invalidate();
+}
+
+void ButtonRow::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData& data) {
+	if (change == QQuickItem::ItemChildAddedChange) {
+		auto* const child = data.item;
+		QObject::connect(child, &QQuickItem::implicitWidthChanged, this, &ButtonRow::invalidate);
+		QObject::connect(child, &QQuickItem::implicitHeightChanged, this, &ButtonRow::invalidate);
+		QObject::connect(child, &QQuickItem::visibleChanged, this, &ButtonRow::invalidate);
+
+		const auto* childMeta = child->metaObject();
+		const auto morphSignalIdx = childMeta->indexOfSignal("shapeMorphExpansionChanged()");
+		if (morphSignalIdx != -1)
+			QObject::connect(child, childMeta->method(morphSignalIdx), this,
+			                 metaObject()->method(metaObject()->indexOfSlot("invalidate()")));
+
+		invalidate();
+	} else if (change == QQuickItem::ItemChildRemovedChange) {
+		QObject::disconnect(data.item, nullptr, this, nullptr);
+		invalidate();
+	}
+
+	QQuickItem::itemChange(change, data);
+}
+
+void ButtonRow::updatePolish() {
+	if (m_dirty) {
+		relayout();
+		m_dirty = false;
+	}
+}
+
+void ButtonRow::invalidate() {
+	m_dirty = true;
+	polish();
+}
+
+void ButtonRow::relayout() {
+	const auto allChildren = childItems();
+
+	QList<QQuickItem*> validChildren;
+	for (auto* const child : allChildren) {
+		if (child->isVisible() && !child->inherits("QQuickRepeater"))
+			validChildren.append(child);
+	}
+	const auto nChildren = validChildren.size();
+	const auto totalSpacing = static_cast<qreal>(nChildren - 1) * m_spacing;
+
+	qreal reservedWidth = 0;
+	qreal unreservedWidth = 0;
+	int fillWidthCount = 0;
+	qreal maxHeight = 0;
+	for (auto* const child : validChildren) {
+		maxHeight = qMax(maxHeight, child->implicitHeight());
+
+		const auto prop = child->property("fillWidth");
+		if (!prop.isValid())
+			continue;
+
+		if (prop.toBool()) {
+			fillWidthCount++;
+			unreservedWidth += child->implicitWidth();
+		} else {
+			reservedWidth += child->implicitWidth();
+		}
+	}
+
+	if (fillWidthCount == 0)
+		fillWidthCount = 1; // Avoid divide by 0
+
+	const auto widthPerItem = (width() - totalSpacing - reservedWidth) / static_cast<qreal>(fillWidthCount);
+
+	QList<qreal> baseWidths;
+	baseWidths.reserve(nChildren);
+	for (auto* const child : validChildren)
+		baseWidths.append(child->property("fillWidth").toBool() ? widthPerItem : child->implicitWidth());
+
+	qreal accX = 0;
+	for (int i = 0; i < nChildren; ++i) {
+		auto* const child = validChildren[i];
+
+		// clang-format off
+		auto prevExtraWidth = i > 0             ? getMorphExpansion(validChildren[i - 1]) : 0.0;
+		auto nextExtraWidth = i < nChildren - 1 ? getMorphExpansion(validChildren[i + 1]) : 0.0;
+		// clang-format on
+
+		// Items at edges push by full amount, items in middle push by half
+		if (i > 1)
+			prevExtraWidth /= 2;
+		if (i < nChildren - 2)
+			nextExtraWidth /= 2;
+
+		child->setWidth(baseWidths[i] + getMorphExpansion(child) - prevExtraWidth - nextExtraWidth);
+		child->setHeight(maxHeight);
+
+		child->setX(accX);
+		child->setY(0);
+		accX += child->width() + m_spacing;
+	}
+
+	setImplicitWidth(reservedWidth + unreservedWidth + totalSpacing);
+	setImplicitHeight(maxHeight);
+}
+
+qreal ButtonRow::getMorphExpansion(const QQuickItem* item) {
+	return item->property("shapeMorphExpansion").toReal();
+}
+
+} // namespace ZShell::components