X-Git-Url: http://git.code-monkey.de/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fviews%2Ftrace%2Fviewitem.hpp;fp=pv%2Fviews%2Ftrace%2Fviewitem.hpp;h=e1cc20040bd8ab33f3cded664454ebce23835136;hp=0000000000000000000000000000000000000000;hb=1573bf16ba50d1c023ad3a9ce596f0ab6eaeacff;hpb=4c7a19d3d7049bcc9fb3185ce2bc91333a7ca9e1

diff --git a/pv/views/trace/viewitem.hpp b/pv/views/trace/viewitem.hpp
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+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PULSEVIEW_PV_VIEWITEM_HPP
+#define PULSEVIEW_PV_VIEWITEM_HPP
+
+#include <list>
+
+#include <QPen>
+
+#include "viewitempaintparams.hpp"
+
+class QAction;
+class QMenu;
+class QWidget;
+
+namespace pv {
+
+namespace widgets {
+class Popup;
+}
+
+namespace views {
+namespace trace {
+
+class ViewItemOwner;
+
+class ViewItem : public QObject
+{
+	Q_OBJECT
+
+public:
+	static const QSizeF LabelPadding;
+	static const int HighlightRadius;
+
+public:
+	ViewItem();
+
+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.
+	 */
+	bool selected() const;
+
+	/**
+	 * Selects or deselects the signal.
+	 */
+	virtual void select(bool select = true);
+
+	/**
+	 * Returns true if the item may be dragged/moved.
+	 */
+	virtual bool is_draggable() const;
+
+	/**
+	 * Returns true if the item is being dragged.
+	 */
+	bool dragging() const;
+
+	/**
+	 * Sets this item into the dragged state.
+	 */
+	void drag();
+
+	/**
+	 * Sets this item into the un-dragged state.
+	 */
+	virtual void drag_release();
+
+	/**
+	 * Drags the item to a delta relative to the drag point.
+	 * @param delta the offset from the drag point.
+	 */
+	virtual void drag_by(const QPoint &delta) = 0;
+
+	/**
+	 * Get the drag point.
+	 * @param rect the rectangle of the widget area.
+	 */
+	virtual QPoint point(const QRect &rect) 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.
+	 * @remarks The default implementation returns an empty rectangle.
+	 */
+	virtual QRectF label_rect(const QRectF &rect) const;
+
+	/**
+	 * Computes the outline rectangle of the viewport hit-box.
+	 * @param rect the rectangle of the viewport area.
+	 * @return Returns the rectangle of the hit-box.
+	 * @remarks The default implementation returns an empty hit-box.
+	 */
+	virtual QRectF hit_box_rect(const ViewItemPaintParams &pp) const;
+
+	/**
+	 * Paints the signal label.
+	 * @param p the QPainter to paint into.
+	 * @param rect the rectangle of the header area.
+	 * @param hover true if the label is being hovered over by the mouse.
+	 */
+	virtual void paint_label(QPainter &p, const QRect &rect, bool hover);
+
+	/**
+	 * Paints the background layer of the item with a QPainter
+	 * @param p the QPainter to paint into.
+	 * @param pp the painting parameters object to paint with.
+	 */
+	virtual void paint_back(QPainter &p, ViewItemPaintParams &pp);
+
+	/**
+	 * Paints the mid-layer of the item with a QPainter
+	 * @param p the QPainter to paint into.
+	 * @param pp the painting parameters object to paint with.
+	 */
+	virtual void paint_mid(QPainter &p, ViewItemPaintParams &pp);
+
+	/**
+	 * Paints the foreground layer of the item with a QPainter
+	 * @param p the QPainter to paint into.
+	 * @param pp the painting parameters object to paint with.
+	 */
+	virtual void paint_fore(QPainter &p, ViewItemPaintParams &pp);
+
+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);
+
+	virtual pv::widgets::Popup* create_popup(QWidget *parent);
+
+	virtual void delete_pressed();
+
+protected:
+	static QPen highlight_pen();
+
+protected:
+	QWidget *context_parent_;
+	QPoint drag_point_;
+
+private:
+	bool selected_;
+};
+
+} // namespace trace
+} // namespace views
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEWITEM_HPP