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 CursorPair& cursors();
165 * Returns a reference to the pair of cursors.
167 const CursorPair& cursors() const;
169 const QPoint& hover_point() const;
171 void update_viewport();
173 void restack_all_row_items();
176 void hover_point_changed();
178 void signals_moved();
180 void selection_changed();
182 void scale_offset_changed();
185 void get_scroll_layout(double &length, double &offset) const;
188 * Simultaneously sets the zoom and offset.
189 * @param scale The scale to set the view to in seconds per pixel. This
190 * value is clamped between MinScale and MaxScale.
191 * @param offset The offset of the left edge of the view in seconds.
193 void set_zoom(double scale, int offset);
196 * Find a tick spacing and number formatting that does not cause
197 * the values to collide.
199 void calculate_tick_spacing();
201 void update_scroll();
203 void update_layout();
206 * Satisifies RowItem functionality.
207 * @param p the QPainter to paint into.
208 * @param right the x-coordinate of the right edge of the header
210 * @param hover true if the label is being hovered over by the mouse.
212 void paint_label(QPainter &p, int right, bool hover);
215 * Computes the outline rectangle of a label.
216 * @param right the x-coordinate of the right edge of the header
218 * @return Returns the rectangle of the signal label.
220 QRectF label_rect(int right);
222 static bool add_channels_to_owner(
223 const std::vector< std::shared_ptr<sigrok::Channel> > &channels,
224 RowItemOwner *owner, int &offset,
225 std::unordered_map<std::shared_ptr<sigrok::Channel>,
226 std::shared_ptr<Signal> > &signal_map,
227 std::function<bool (std::shared_ptr<RowItem>)> filter_func =
228 std::function<bool (std::shared_ptr<RowItem>)>());
230 static void apply_offset(
231 std::shared_ptr<RowItem> row_item, int &offset);
234 bool eventFilter(QObject *object, QEvent *event);
236 bool viewportEvent(QEvent *e);
238 void resizeEvent(QResizeEvent *e);
241 void appearance_changed(bool label, bool content);
243 void extents_changed(bool horz, bool vert);
247 void h_scroll_value_changed(int value);
248 void v_scroll_value_changed(int value);
250 void signals_changed();
253 void marker_time_changed();
255 void on_signals_moved();
257 void process_sticky_events();
259 void on_hover_point_changed();
266 CursorHeader *cursorheader_;
269 /// The view time scale in seconds per pixel.
272 /// The view time offset in seconds.
276 bool updating_scroll_;
279 unsigned int tick_prefix_;
286 unsigned int sticky_events_;
287 QTimer lazy_event_handler_;
293 #endif // PULSEVIEW_PV_VIEW_VIEW_H