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;
103 * Returns the number of nested parents that this row item owner has.
105 unsigned int depth() const;
107 void zoom(double steps);
108 void zoom(double steps, int offset);
112 void zoom_one_to_one();
115 * Sets the scale and offset.
116 * @param scale The new view scale in seconds per pixel.
117 * @param offset The view time offset in seconds.
119 void set_scale_offset(double scale, double offset);
121 std::set< std::shared_ptr<pv::data::SignalData> >
122 get_visible_data() const;
124 std::pair<double, double> get_time_extents() const;
127 * Returns true if cursors are displayed. false otherwise.
129 bool cursors_shown() const;
132 * Shows or hides the cursors.
134 void show_cursors(bool show = true);
137 * Moves the cursors to a convenient position in the view.
139 void centre_cursors();
142 * Returns a reference to the pair of cursors.
144 CursorPair& cursors();
147 * Returns a reference to the pair of cursors.
149 const CursorPair& cursors() const;
151 const QPoint& hover_point() const;
153 void update_viewport();
156 void hover_point_changed();
158 void signals_moved();
160 void selection_changed();
162 void scale_offset_changed();
165 void get_scroll_layout(double &length, double &offset) const;
168 * Simultaneously sets the zoom and offset.
169 * @param scale The scale to set the view to in seconds per pixel. This
170 * value is clamped between MinScale and MaxScale.
171 * @param offset The offset of the left edge of the view in seconds.
173 void set_zoom(double scale, int offset);
175 void update_scroll();
177 void update_layout();
180 * Satisifies RowItem functionality.
181 * @param p the QPainter to paint into.
182 * @param right the x-coordinate of the right edge of the header
184 * @param hover true if the label is being hovered over by the mouse.
186 void paint_label(QPainter &p, int right, bool hover);
189 * Computes the outline rectangle of a label.
190 * @param right the x-coordinate of the right edge of the header
192 * @return Returns the rectangle of the signal label.
194 QRectF label_rect(int right);
197 bool eventFilter(QObject *object, QEvent *event);
199 bool viewportEvent(QEvent *e);
201 void resizeEvent(QResizeEvent *e);
204 void appearance_changed(bool label, bool content);
206 void extents_changed(bool horz, bool vert);
210 void h_scroll_value_changed(int value);
211 void v_scroll_value_changed(int value);
213 void signals_changed();
216 void marker_time_changed();
218 void on_signals_moved();
220 void process_sticky_events();
222 void on_hover_point_changed();
225 SigSession &_session;
229 CursorHeader *_cursorheader;
232 /// The view time scale in seconds per pixel.
235 /// The view time offset in seconds.
239 bool _updating_scroll;
246 unsigned int _sticky_events;
247 QTimer _lazy_event_handler;
253 #endif // PULSEVIEW_PV_VIEW_VIEW_H