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>
33 #include <pv/data/signaldata.h>
35 #include "cursorpair.h"
36 #include "rowitemowner.h"
49 class View : public QAbstractScrollArea, public RowItemOwner {
53 static const double MaxScale;
54 static const double MinScale;
56 static const int MaxScrollValue;
59 static const int SignalHeight;
60 static const int SignalMargin;
61 static const int SignalSnapGridSize;
63 static const QColor CursorAreaColour;
65 static const QSizeF LabelPadding;
68 explicit View(SigSession &session, QWidget *parent = 0);
70 SigSession& session();
71 const SigSession& session() const;
74 * Returns the view of the owner.
76 virtual pv::view::View* view();
79 * Returns the view of the owner.
81 virtual const pv::view::View* view() const;
85 const Viewport* viewport() const;
88 * Returns the view time scale in seconds per pixel.
93 * Returns the time offset of the left edge of the view in
96 double offset() const;
97 int owner_v_offset() const;
99 void zoom(double steps);
100 void zoom(double steps, int offset);
104 void zoom_one_to_one();
107 * Sets the scale and offset.
108 * @param scale The new view scale in seconds per pixel.
109 * @param offset The view time offset in seconds.
111 void set_scale_offset(double scale, double offset);
113 std::list<std::weak_ptr<SelectableItem> > selected_items() const;
115 std::set< std::shared_ptr<pv::data::SignalData> >
116 get_visible_data() const;
118 std::pair<double, double> get_time_extents() const;
121 * Returns true if cursors are displayed. false otherwise.
123 bool cursors_shown() const;
126 * Shows or hides the cursors.
128 void show_cursors(bool show = true);
131 * Moves the cursors to a convenient position in the view.
133 void centre_cursors();
136 * Returns a reference to the pair of cursors.
138 CursorPair& cursors();
141 * Returns a reference to the pair of cursors.
143 const CursorPair& cursors() const;
145 const QPoint& hover_point() const;
147 void normalize_layout();
149 void update_viewport();
152 void hover_point_changed();
154 void signals_moved();
156 void selection_changed();
158 void scale_offset_changed();
161 void get_scroll_layout(double &length, double &offset) const;
164 * Simultaneously sets the zoom and offset.
165 * @param scale The scale to set the view to in seconds per pixel. This
166 * value is clamped between MinScale and MaxScale.
167 * @param offset The offset of the left edge of the view in seconds.
169 void set_zoom(double scale, int offset);
171 void update_scroll();
173 void update_layout();
176 * Satisifies RowItem functionality.
177 * @param p the QPainter to paint into.
178 * @param right the x-coordinate of the right edge of the header
180 * @param hover true if the label is being hovered over by the mouse.
182 void paint_label(QPainter &p, int right, bool hover);
185 * Computes the outline rectangle of a label.
186 * @param right the x-coordinate of the right edge of the header
188 * @return Returns the rectangle of the signal label.
190 QRectF label_rect(int right);
193 bool eventFilter(QObject *object, QEvent *event);
195 bool viewportEvent(QEvent *e);
197 void resizeEvent(QResizeEvent *e);
201 void h_scroll_value_changed(int value);
202 void v_scroll_value_changed(int value);
204 void signals_changed();
207 void marker_time_changed();
209 void on_signals_moved();
211 void on_geometry_updated();
213 void on_hover_point_changed();
216 SigSession &_session;
220 CursorHeader *_cursorheader;
223 /// The view time scale in seconds per pixel.
226 /// The view time offset in seconds.
230 bool _updating_scroll;
241 #endif // PULSEVIEW_PV_VIEW_VIEW_H