#include <QColor>
#include <QPainter>
+#include <QPen>
#include <QRect>
#include <QString>
Q_OBJECT
private:
+ static const QPen AxisPen;
static const int LabelHitPadding;
protected:
*/
virtual bool enabled() const = 0;
- void set_view(pv::view::View *view);
+ virtual void set_view(pv::view::View *view);
/**
- * Paints the trace with a QPainter
+ * Paints the background layer of the trace with a QPainter
* @param p the QPainter to paint into.
* @param left the x-coordinate of the left edge of the signal
* @param right the x-coordinate of the right edge of the signal
**/
- virtual void paint(QPainter &p, int left, int right) = 0;
+ virtual void paint_back(QPainter &p, int left, int right);
+
+ /**
+ * Paints the mid-layer of the trace with a QPainter
+ * @param p the QPainter to paint into.
+ * @param left the x-coordinate of the left edge of the signal
+ * @param right the x-coordinate of the right edge of the signal
+ **/
+ virtual void paint_mid(QPainter &p, int left, int right);
+
+ /**
+ * Paints the foreground layer of the trace with a QPainter
+ * @param p the QPainter to paint into.
+ * @param left the x-coordinate of the left edge of the signal
+ * @param right the x-coordinate of the right edge of the signal
+ **/
+ virtual void paint_fore(QPainter &p, int left, int right);
/**
* Paints the signal label into a QGLWidget.
*/
bool pt_in_label_rect(int left, int right, const QPoint &point);
+protected:
+ /**
+ * Gets the y-offset of the axis.
+ */
+ int get_y() const;
+
+ /**
+ * 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.
+ */
+ QColor get_text_colour() const;
+
+ /**
+ * Paints a zero axis across the viewport.
+ * @param p the QPainter to paint into.
+ * @param y the y-offset of the axis.
+ * @param left the x-coordinate of the left edge of the view.
+ * @param right the x-coordinate of the right edge of the view.
+ */
+ void paint_axis(QPainter &p, int y, int left, int right);
+
private:
/**