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
28 #include <unordered_map>
31 #include <QAbstractScrollArea>
35 #include <pv/data/signaldata.hpp>
37 #include "cursorpair.hpp"
38 #include "rowitemowner.hpp"
51 class View : public QAbstractScrollArea, public RowItemOwner {
56 SelectableItemHExtentsChanged = 1,
57 SelectableItemVExtentsChanged = 2
61 static const double MaxScale;
62 static const double MinScale;
64 static const int MaxScrollValue;
66 static const int ScaleUnits[3];
69 static const QColor CursorAreaColour;
71 static const QSizeF LabelPadding;
74 explicit View(Session &session, QWidget *parent = 0);
77 const Session& session() const;
80 * Returns the view of the owner.
82 virtual pv::view::View* view();
85 * Returns the view of the owner.
87 virtual const pv::view::View* view() const;
91 const Viewport* viewport() const;
94 * Gets a list of time markers.
96 std::vector< std::shared_ptr<TimeItem> > time_items() const;
99 * Returns the view time scale in seconds per pixel.
101 double scale() const;
104 * Returns the time offset of the left edge of the view in
107 double offset() const;
108 int owner_visual_v_offset() const;
111 * Returns the SI prefix to apply to the graticule time markings.
113 unsigned int tick_prefix() const;
116 * Returns period of the graticule time markings.
118 double tick_period() const;
121 * Returns the number of nested parents that this row item owner has.
123 unsigned int depth() const;
125 void zoom(double steps);
126 void zoom(double steps, int offset);
130 void zoom_one_to_one();
133 * Sets the scale and offset.
134 * @param scale The new view scale in seconds per pixel.
135 * @param offset The view time offset in seconds.
137 void set_scale_offset(double scale, double offset);
139 std::set< std::shared_ptr<pv::data::SignalData> >
140 get_visible_data() const;
142 std::pair<double, double> get_time_extents() const;
145 * Returns true if cursors are displayed. false otherwise.
147 bool cursors_shown() const;
150 * Shows or hides the cursors.
152 void show_cursors(bool show = true);
155 * Moves the cursors to a convenient position in the view.
157 void centre_cursors();
160 * Returns a reference to the pair of cursors.
162 std::shared_ptr<CursorPair> cursors() const;
164 const QPoint& hover_point() const;
166 void update_viewport();
168 void restack_all_row_items();
171 void hover_point_changed();
173 void signals_moved();
175 void selection_changed();
177 void scale_offset_changed();
180 void get_scroll_layout(double &length, double &offset) const;
183 * Simultaneously sets the zoom and offset.
184 * @param scale The scale to set the view to in seconds per pixel. This
185 * value is clamped between MinScale and MaxScale.
186 * @param offset The offset of the left edge of the view in seconds.
188 void set_zoom(double scale, int offset);
191 * Find a tick spacing and number formatting that does not cause
192 * the values to collide.
194 void calculate_tick_spacing();
196 void update_scroll();
198 void update_layout();
201 * Satisifies RowItem functionality.
202 * @param p the QPainter to paint into.
203 * @param rect the rectangle of the header area.
204 * @param hover true if the label is being hovered over by the mouse.
206 void paint_label(QPainter &p, const QRect &rect, bool hover);
209 * Computes the outline rectangle of a label.
210 * @param rect the rectangle of the header area.
211 * @return Returns the rectangle of the signal label.
213 QRectF label_rect(const QRectF &rect);
215 static bool add_channels_to_owner(
216 const std::vector< std::shared_ptr<sigrok::Channel> > &channels,
217 RowItemOwner *owner, int &offset,
218 std::unordered_map<std::shared_ptr<sigrok::Channel>,
219 std::shared_ptr<Signal> > &signal_map,
220 std::function<bool (std::shared_ptr<RowItem>)> filter_func =
221 std::function<bool (std::shared_ptr<RowItem>)>());
223 static void apply_offset(
224 std::shared_ptr<RowItem> row_item, int &offset);
227 bool eventFilter(QObject *object, QEvent *event);
229 bool viewportEvent(QEvent *e);
231 void resizeEvent(QResizeEvent *e);
234 void appearance_changed(bool label, bool content);
236 void extents_changed(bool horz, bool vert);
240 void h_scroll_value_changed(int value);
241 void v_scroll_value_changed(int value);
243 void signals_changed();
246 void marker_time_changed();
248 void on_signals_moved();
250 void process_sticky_events();
252 void on_hover_point_changed();
259 CursorHeader *cursorheader_;
262 /// The view time scale in seconds per pixel.
265 /// The view time offset in seconds.
269 bool updating_scroll_;
272 unsigned int tick_prefix_;
275 std::shared_ptr<CursorPair> cursors_;
279 unsigned int sticky_events_;
280 QTimer lazy_event_handler_;
286 #endif // PULSEVIEW_PV_VIEW_VIEW_H