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_HPP
22 #define PULSEVIEW_PV_VIEW_VIEW_HPP
29 #include <unordered_map>
32 #include <QAbstractScrollArea>
36 #include <pv/data/signaldata.hpp>
37 #include <pv/util.hpp>
39 #include "cursorpair.hpp"
41 #include "rowitemowner.hpp"
59 class View : public QAbstractScrollArea, public RowItemOwner {
64 RowItemHExtentsChanged = 1,
65 RowItemVExtentsChanged = 2
69 static const double MaxScale;
70 static const double MinScale;
72 static const int MaxScrollValue;
73 static const int MaxViewAutoUpdateRate;
75 static const int ScaleUnits[3];
78 explicit View(Session &session, QWidget *parent = 0);
81 const Session& session() const;
84 * Returns the view of the owner.
86 virtual pv::view::View* view();
89 * Returns the view of the owner.
91 virtual const pv::view::View* view() const;
95 const Viewport* viewport() const;
98 * Gets a list of time markers.
100 std::vector< std::shared_ptr<TimeItem> > time_items() const;
103 * Returns the view time scale in seconds per pixel.
105 double scale() const;
108 * Returns the time offset of the left edge of the view in
111 double offset() const;
114 * Returns the vertical scroll offset.
116 int owner_visual_v_offset() const;
119 * Sets the visual v-offset.
121 void set_v_offset(int offset);
124 * Returns the SI prefix to apply to the graticule time markings.
126 unsigned int tick_prefix() const;
129 * Returns period of the graticule time markings.
131 double tick_period() const;
134 * Returns the unit of time currently used.
136 util::TimeUnit time_unit() const;
139 * Returns the number of nested parents that this row item owner has.
141 unsigned int depth() const;
143 void zoom(double steps);
144 void zoom(double steps, int offset);
146 void zoom_fit(bool gui_state);
148 void zoom_one_to_one();
151 * Sets the scale and offset.
152 * @param scale The new view scale in seconds per pixel.
153 * @param offset The view time offset in seconds.
155 void set_scale_offset(double scale, double offset);
157 std::set< std::shared_ptr<pv::data::SignalData> >
158 get_visible_data() const;
160 std::pair<double, double> get_time_extents() const;
163 * Enables or disables sticky scrolling, i.e. the view always shows
164 * the most recent samples when capturing data.
166 void enable_sticky_scrolling(bool state);
169 * Returns true if cursors are displayed. false otherwise.
171 bool cursors_shown() const;
174 * Shows or hides the cursors.
176 void show_cursors(bool show = true);
179 * Moves the cursors to a convenient position in the view.
181 void centre_cursors();
184 * Returns a reference to the pair of cursors.
186 std::shared_ptr<CursorPair> cursors() const;
189 * Adds a new flag at a specified time.
191 void add_flag(double time);
194 * Removes a flag from the list.
196 void remove_flag(std::shared_ptr<Flag> flag);
199 * Gets the list of flags.
201 std::vector< std::shared_ptr<Flag> > flags() const;
203 const QPoint& hover_point() const;
205 void update_viewport();
207 void restack_all_row_items();
210 void hover_point_changed();
212 void selection_changed();
214 void scale_offset_changed();
216 void sticky_scrolling_changed(bool state);
218 void always_zoom_to_fit_changed(bool state);
221 void get_scroll_layout(double &length, double &offset) const;
224 * Simultaneously sets the zoom and offset.
225 * @param scale The scale to set the view to in seconds per pixel. This
226 * value is clamped between MinScale and MaxScale.
227 * @param offset The offset of the left edge of the view in seconds.
229 void set_zoom(double scale, int offset);
232 * Find a tick spacing and number formatting that does not cause
233 * the values to collide.
235 void calculate_tick_spacing();
237 void update_scroll();
239 void update_layout();
242 * Satisifies RowItem functionality.
243 * @param p the QPainter to paint into.
244 * @param rect the rectangle of the header area.
245 * @param hover true if the label is being hovered over by the mouse.
247 void paint_label(QPainter &p, const QRect &rect, bool hover);
250 * Computes the outline rectangle of a label.
251 * @param rect the rectangle of the header area.
252 * @return Returns the rectangle of the signal label.
254 QRectF label_rect(const QRectF &rect);
256 RowItemOwner* find_prevalent_trace_group(
257 const std::shared_ptr<sigrok::ChannelGroup> &group,
258 const std::unordered_map<std::shared_ptr<sigrok::Channel>,
259 std::shared_ptr<Signal> > &signal_map);
261 static std::vector< std::shared_ptr<Trace> >
262 extract_new_traces_for_channels(
263 const std::vector< std::shared_ptr<sigrok::Channel> > &channels,
264 const std::unordered_map<std::shared_ptr<sigrok::Channel>,
265 std::shared_ptr<Signal> > &signal_map,
266 std::set< std::shared_ptr<Trace> > &add_list);
268 void determine_time_unit();
271 bool eventFilter(QObject *object, QEvent *event);
273 bool viewportEvent(QEvent *e);
275 void resizeEvent(QResizeEvent *e);
278 void row_item_appearance_changed(bool label, bool content);
279 void time_item_appearance_changed(bool label, bool content);
281 void extents_changed(bool horz, bool vert);
285 void h_scroll_value_changed(int value);
286 void v_scroll_value_changed();
288 void signals_changed();
291 void perform_delayed_view_update();
293 void process_sticky_events();
295 void on_hover_point_changed();
304 /// The view time scale in seconds per pixel.
307 /// The view time offset in seconds.
310 bool updating_scroll_;
311 bool sticky_scrolling_;
312 bool always_zoom_to_fit_;
313 QTimer delayed_view_updater_;
316 unsigned int tick_prefix_;
317 util::TimeUnit time_unit_;
320 std::shared_ptr<CursorPair> cursors_;
322 std::list< std::shared_ptr<Flag> > flags_;
323 char next_flag_text_;
327 unsigned int sticky_events_;
328 QTimer lazy_event_handler_;
334 #endif // PULSEVIEW_PV_VIEW_VIEW_HPP