+ qreal preferredColumnWidth(const QByteArray &role) const;
+
+ /**
+ * Sets the widths of the columns *before* the first column and *after* the last column.
+ * This is intended to facilitate an empty region for deselection in the main viewport.
+ */
+ void setSidePadding(qreal leftPaddingWidth, qreal rightPaddingWidth);
+ qreal leftPadding() const;
+ qreal rightPadding() const;
+
+Q_SIGNALS:
+ void sidePaddingChanged(qreal leftPaddingWidth, qreal rightPaddingWidth);