X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fview%2Fselectableitem.hpp;h=b61c54d6430bebd04c575a2ee3e101285e9ee34e;hb=7ddb8da6cae27c619644cd26cfbf8263d286f7a1;hp=36ff0dbcd48a95adf8626aefe751185adb1c39f7;hpb=2acdb232d6bb452cfdfaea3ef5218fb4da592329;p=pulseview.git

diff --git a/pv/view/selectableitem.hpp b/pv/view/selectableitem.hpp
index 36ff0dbc..b61c54d6 100644
--- a/pv/view/selectableitem.hpp
+++ b/pv/view/selectableitem.hpp
@@ -48,6 +48,11 @@ public:
 	SelectableItem();
 
 public:
+	/**
+	 * Returns true if the item is visible and enabled.
+	 */
+	virtual bool enabled() const = 0;
+
 	/**
 	 * Returns true if the item has been selected by the user.
 	 */
@@ -83,6 +88,22 @@ public:
 	 */
 	virtual QPoint point() const = 0;
 
+	/**
+	 * Computes the outline rectangle of a label.
+	 * @param rect the rectangle of the header area.
+	 * @return Returns the rectangle of the signal label.
+	 */
+	virtual QRectF label_rect(const QRectF &rect) const = 0;
+
+public:
+	/**
+	 * Gets the text colour.
+	 * @remarks This colour is computed by comparing the lightness
+	 * of the trace colour against a threshold to determine whether
+	 * white or black would be more visible.
+	 */
+	static QColor select_text_colour(QColor background);
+
 public:
 	virtual QMenu* create_context_menu(QWidget *parent);