2 * This file is part of the PulseView project.
4 * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef PULSEVIEW_PV_SELECTABLEITEM_H
22 #define PULSEVIEW_PV_SELECTABLEITEM_H
40 class SelectableItem : public QObject
45 static const int HighlightRadius;
52 * Returns true if the item is visible and enabled.
54 virtual bool enabled() const = 0;
57 * Returns true if the item has been selected by the user.
59 bool selected() const;
62 * Selects or deselects the signal.
64 void select(bool select = true);
67 * Returns true if the item is being dragged.
69 bool dragging() const;
72 * Retunrns the current drag point.
74 QPoint drag_point() const;
77 * Sets this item into the dragged state.
82 * Sets this item into the un-dragged state.
89 virtual QPoint point() const = 0;
92 * Computes the outline rectangle of a label.
93 * @param rect the rectangle of the header area.
94 * @return Returns the rectangle of the signal label.
96 virtual QRectF label_rect(const QRectF &rect) const = 0;
100 * Gets the text colour.
101 * @remarks This colour is computed by comparing the lightness
102 * of the trace colour against a threshold to determine whether
103 * white or black would be more visible.
105 static QColor select_text_colour(QColor background);
108 virtual QMenu* create_context_menu(QWidget *parent);
110 virtual pv::widgets::Popup* create_popup(QWidget *parent) = 0;
112 virtual void delete_pressed();
115 static QPen highlight_pen();
118 QWidget *context_parent_;
128 #endif // PULSEVIEW_PV_SELECTABLEITEM_H