2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 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_VIEW_VIEW_H
22 #define PULSEVIEW_PV_VIEW_VIEW_H
30 #include <QAbstractScrollArea>
34 #include <pv/data/signaldata.h>
36 #include "cursorpair.h"
37 #include "rowitemowner.h"
50 class View : public QAbstractScrollArea, public RowItemOwner {
55 SelectableItemHExtentsChanged = 1,
56 SelectableItemVExtentsChanged = 2
60 static const double MaxScale;
61 static const double MinScale;
63 static const int MaxScrollValue;
66 static const QColor CursorAreaColour;
68 static const QSizeF LabelPadding;
71 explicit View(SigSession &session, QWidget *parent = 0);
73 SigSession& session();
74 const SigSession& session() const;
77 * Returns the view of the owner.
79 virtual pv::view::View* view();
82 * Returns the view of the owner.
84 virtual const pv::view::View* view() const;
88 const Viewport* viewport() const;
91 * Returns the view time scale in seconds per pixel.
96 * Returns the time offset of the left edge of the view in
99 double offset() const;
100 int owner_v_offset() const;
102 void zoom(double steps);
103 void zoom(double steps, int offset);
107 void zoom_one_to_one();
110 * Sets the scale and offset.
111 * @param scale The new view scale in seconds per pixel.
112 * @param offset The view time offset in seconds.
114 void set_scale_offset(double scale, double offset);
116 std::set< std::shared_ptr<pv::data::SignalData> >
117 get_visible_data() const;
119 std::pair<double, double> get_time_extents() const;
122 * Returns true if cursors are displayed. false otherwise.
124 bool cursors_shown() const;
127 * Shows or hides the cursors.
129 void show_cursors(bool show = true);
132 * Moves the cursors to a convenient position in the view.
134 void centre_cursors();
137 * Returns a reference to the pair of cursors.
139 CursorPair& cursors();
142 * Returns a reference to the pair of cursors.
144 const CursorPair& cursors() const;
146 const QPoint& hover_point() const;
148 void update_viewport();
151 void hover_point_changed();
153 void signals_moved();
155 void selection_changed();
157 void scale_offset_changed();
160 void get_scroll_layout(double &length, double &offset) const;
163 * Simultaneously sets the zoom and offset.
164 * @param scale The scale to set the view to in seconds per pixel. This
165 * value is clamped between MinScale and MaxScale.
166 * @param offset The offset of the left edge of the view in seconds.
168 void set_zoom(double scale, int offset);
170 void update_scroll();
172 void update_layout();
175 * Satisifies RowItem functionality.
176 * @param p the QPainter to paint into.
177 * @param right the x-coordinate of the right edge of the header
179 * @param hover true if the label is being hovered over by the mouse.
181 void paint_label(QPainter &p, int right, bool hover);
184 * Computes the outline rectangle of a label.
185 * @param right the x-coordinate of the right edge of the header
187 * @return Returns the rectangle of the signal label.
189 QRectF label_rect(int right);
192 bool eventFilter(QObject *object, QEvent *event);
194 bool viewportEvent(QEvent *e);
196 void resizeEvent(QResizeEvent *e);
199 void appearance_changed(bool label, bool content);
201 void extents_changed(bool horz, bool vert);
205 void h_scroll_value_changed(int value);
206 void v_scroll_value_changed(int value);
208 void signals_changed();
211 void marker_time_changed();
213 void on_signals_moved();
215 void process_sticky_events();
217 void on_hover_point_changed();
220 SigSession &_session;
224 CursorHeader *_cursorheader;
227 /// The view time scale in seconds per pixel.
230 /// The view time offset in seconds.
234 bool _updating_scroll;
241 unsigned int _sticky_events;
242 QTimer _lazy_event_handler;
248 #endif // PULSEVIEW_PV_VIEW_VIEW_H