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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | ||
21 | #include "header.hpp" | |
22 | #include "view.hpp" | |
23 | ||
24 | #include "signal.hpp" | |
25 | #include "tracegroup.hpp" | |
26 | ||
27 | #include <cassert> | |
28 | #include <algorithm> | |
29 | ||
30 | #include <boost/iterator/filter_iterator.hpp> | |
31 | ||
32 | #include <QApplication> | |
33 | #include <QMenu> | |
34 | #include <QMouseEvent> | |
35 | #include <QPainter> | |
36 | #include <QRect> | |
37 | ||
38 | #include <pv/session.hpp> | |
39 | #include <pv/widgets/popup.hpp> | |
40 | ||
41 | using boost::make_filter_iterator; | |
42 | using std::dynamic_pointer_cast; | |
43 | using std::max; | |
44 | using std::make_pair; | |
45 | using std::min; | |
46 | using std::pair; | |
47 | using std::shared_ptr; | |
48 | using std::stable_sort; | |
49 | using std::vector; | |
50 | ||
51 | namespace pv { | |
52 | namespace view { | |
53 | ||
54 | const int Header::Padding = 12; | |
55 | const int Header::BaselineOffset = 5; | |
56 | ||
57 | static bool item_selected(shared_ptr<RowItem> r) | |
58 | { | |
59 | return r->selected(); | |
60 | } | |
61 | ||
62 | Header::Header(View &parent) : | |
63 | MarginWidget(parent) | |
64 | { | |
65 | connect(&view_, SIGNAL(signals_moved()), | |
66 | this, SLOT(on_signals_moved())); | |
67 | } | |
68 | ||
69 | QSize Header::sizeHint() const | |
70 | { | |
71 | QRectF max_rect(-Padding, 0, Padding, 0); | |
72 | for (auto &i : view_) | |
73 | if (i->enabled()) | |
74 | max_rect = max_rect.united(i->label_rect(QRect())); | |
75 | return QSize(max_rect.width() + Padding + BaselineOffset, 0); | |
76 | } | |
77 | ||
78 | QSize Header::extended_size_hint() const | |
79 | { | |
80 | return sizeHint() + QSize(ViewItem::HighlightRadius, 0); | |
81 | } | |
82 | ||
83 | vector< shared_ptr<ViewItem> > Header::items() | |
84 | { | |
85 | return vector< shared_ptr<ViewItem> >(view_.begin(), view_.end()); | |
86 | } | |
87 | ||
88 | shared_ptr<ViewItem> Header::get_mouse_over_item(const QPoint &pt) | |
89 | { | |
90 | const QRect r(0, 0, width() - BaselineOffset, height()); | |
91 | for (auto &i : view_) | |
92 | if (i->enabled() && i->label_rect(r).contains(pt)) | |
93 | return i; | |
94 | return shared_ptr<RowItem>(); | |
95 | } | |
96 | ||
97 | void Header::clear_selection() | |
98 | { | |
99 | for (auto &i : view_) | |
100 | i->select(false); | |
101 | update(); | |
102 | } | |
103 | ||
104 | void Header::paintEvent(QPaintEvent*) | |
105 | { | |
106 | // The trace labels are not drawn with the arrows exactly on the | |
107 | // left edge of the widget, because then the selection shadow | |
108 | // would be clipped away. | |
109 | const QRect rect(0, 0, width() - BaselineOffset, height()); | |
110 | ||
111 | vector< shared_ptr<RowItem> > row_items( | |
112 | view_.begin(), view_.end()); | |
113 | ||
114 | stable_sort(row_items.begin(), row_items.end(), | |
115 | [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) { | |
116 | return a->visual_v_offset() < b->visual_v_offset(); }); | |
117 | ||
118 | QPainter painter(this); | |
119 | painter.setRenderHint(QPainter::Antialiasing); | |
120 | ||
121 | for (const shared_ptr<RowItem> r : row_items) | |
122 | { | |
123 | assert(r); | |
124 | ||
125 | const bool highlight = !dragging_ && | |
126 | r->label_rect(rect).contains(mouse_point_); | |
127 | r->paint_label(painter, rect, highlight); | |
128 | } | |
129 | ||
130 | painter.end(); | |
131 | } | |
132 | ||
133 | void Header::mouseLeftPressEvent(QMouseEvent *event) | |
134 | { | |
135 | (void)event; | |
136 | ||
137 | const bool ctrl_pressed = | |
138 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
139 | ||
140 | // Clear selection if control is not pressed and this item is unselected | |
141 | if ((!mouse_down_item_ || !mouse_down_item_->selected()) && | |
142 | !ctrl_pressed) | |
143 | for (shared_ptr<RowItem> r : view_) | |
144 | r->select(false); | |
145 | ||
146 | // Set the signal selection state if the item has been clicked | |
147 | if (mouse_down_item_) { | |
148 | if (ctrl_pressed) | |
149 | mouse_down_item_->select(!mouse_down_item_->selected()); | |
150 | else | |
151 | mouse_down_item_->select(true); | |
152 | } | |
153 | ||
154 | // Save the offsets of any signals which will be dragged | |
155 | for (const shared_ptr<RowItem> r : view_) | |
156 | if (r->selected()) | |
157 | r->drag(); | |
158 | ||
159 | selection_changed(); | |
160 | update(); | |
161 | } | |
162 | ||
163 | void Header::mousePressEvent(QMouseEvent *event) | |
164 | { | |
165 | assert(event); | |
166 | ||
167 | mouse_down_point_ = event->pos(); | |
168 | mouse_down_item_ = get_mouse_over_item(event->pos()); | |
169 | ||
170 | if (event->button() & Qt::LeftButton) | |
171 | mouseLeftPressEvent(event); | |
172 | } | |
173 | ||
174 | void Header::mouseLeftReleaseEvent(QMouseEvent *event) | |
175 | { | |
176 | assert(event); | |
177 | ||
178 | const bool ctrl_pressed = | |
179 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
180 | ||
181 | // Unselect everything if control is not pressed | |
182 | const shared_ptr<ViewItem> mouse_over = | |
183 | get_mouse_over_item(event->pos()); | |
184 | ||
185 | for (auto &r : view_) | |
186 | r->drag_release(); | |
187 | ||
188 | if (dragging_) | |
189 | view_.restack_all_row_items(); | |
190 | else | |
191 | { | |
192 | if (!ctrl_pressed) { | |
193 | for (shared_ptr<RowItem> r : view_) | |
194 | if (mouse_down_item_ != r) | |
195 | r->select(false); | |
196 | ||
197 | if (mouse_down_item_) | |
198 | show_popup(mouse_down_item_); | |
199 | } | |
200 | } | |
201 | ||
202 | dragging_ = false; | |
203 | } | |
204 | ||
205 | void Header::mouseReleaseEvent(QMouseEvent *event) | |
206 | { | |
207 | assert(event); | |
208 | if (event->button() & Qt::LeftButton) | |
209 | mouseLeftReleaseEvent(event); | |
210 | ||
211 | mouse_down_item_ = nullptr; | |
212 | } | |
213 | ||
214 | void Header::mouseMoveEvent(QMouseEvent *event) | |
215 | { | |
216 | assert(event); | |
217 | mouse_point_ = event->pos(); | |
218 | ||
219 | if (!(event->buttons() & Qt::LeftButton)) | |
220 | return; | |
221 | ||
222 | if ((event->pos() - mouse_down_point_).manhattanLength() < | |
223 | QApplication::startDragDistance()) | |
224 | return; | |
225 | ||
226 | // Check all the drag items share a common owner | |
227 | RowItemOwner *item_owner = nullptr; | |
228 | for (shared_ptr<RowItem> r : view_) | |
229 | if (r->dragging()) { | |
230 | if (!item_owner) | |
231 | item_owner = r->owner(); | |
232 | else if(item_owner != r->owner()) | |
233 | return; | |
234 | } | |
235 | ||
236 | if (!item_owner) | |
237 | return; | |
238 | ||
239 | // Do the drag | |
240 | dragging_ = true; | |
241 | ||
242 | const QPoint delta = event->pos() - mouse_down_point_; | |
243 | ||
244 | for (std::shared_ptr<RowItem> r : view_) | |
245 | if (r->dragging()) { | |
246 | r->drag_by(delta); | |
247 | ||
248 | // Ensure the trace is selected | |
249 | r->select(); | |
250 | } | |
251 | ||
252 | item_owner->restack_items(); | |
253 | for (const auto &r : *item_owner) | |
254 | r->animate_to_layout_v_offset(); | |
255 | signals_moved(); | |
256 | ||
257 | update(); | |
258 | } | |
259 | ||
260 | void Header::contextMenuEvent(QContextMenuEvent *event) | |
261 | { | |
262 | const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_); | |
263 | if (!r) | |
264 | return; | |
265 | ||
266 | QMenu *menu = r->create_context_menu(this); | |
267 | if (!menu) | |
268 | menu = new QMenu(this); | |
269 | ||
270 | if (std::count_if(view_.begin(), view_.end(), item_selected) > 1) | |
271 | { | |
272 | menu->addSeparator(); | |
273 | ||
274 | QAction *const group = new QAction(tr("Group"), this); | |
275 | QList<QKeySequence> shortcuts; | |
276 | shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G)); | |
277 | group->setShortcuts(shortcuts); | |
278 | connect(group, SIGNAL(triggered()), this, SLOT(on_group())); | |
279 | menu->addAction(group); | |
280 | } | |
281 | ||
282 | menu->exec(event->globalPos()); | |
283 | } | |
284 | ||
285 | void Header::keyPressEvent(QKeyEvent *e) | |
286 | { | |
287 | assert(e); | |
288 | ||
289 | if (e->key() == Qt::Key_Delete) | |
290 | { | |
291 | for (const shared_ptr<RowItem> r : view_) | |
292 | if (r->selected()) | |
293 | r->delete_pressed(); | |
294 | } | |
295 | else if (e->key() == Qt::Key_G && e->modifiers() == Qt::ControlModifier) | |
296 | on_group(); | |
297 | else if (e->key() == Qt::Key_U && e->modifiers() == Qt::ControlModifier) | |
298 | on_ungroup(); | |
299 | } | |
300 | ||
301 | void Header::on_signals_moved() | |
302 | { | |
303 | update(); | |
304 | } | |
305 | ||
306 | void Header::on_group() | |
307 | { | |
308 | vector< shared_ptr<RowItem> > selected_items( | |
309 | make_filter_iterator(item_selected, view_.begin(), view_.end()), | |
310 | make_filter_iterator(item_selected, view_.end(), view_.end())); | |
311 | stable_sort(selected_items.begin(), selected_items.end(), | |
312 | [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) { | |
313 | return a->visual_v_offset() < b->visual_v_offset(); }); | |
314 | ||
315 | shared_ptr<TraceGroup> group(new TraceGroup()); | |
316 | shared_ptr<RowItem> mouse_down_item( | |
317 | std::dynamic_pointer_cast<RowItem>(mouse_down_item_)); | |
318 | shared_ptr<RowItem> focus_item( | |
319 | mouse_down_item ? mouse_down_item : selected_items.front()); | |
320 | ||
321 | assert(focus_item); | |
322 | assert(focus_item->owner()); | |
323 | focus_item->owner()->add_child_item(group); | |
324 | ||
325 | // Set the group v_offset here before reparenting | |
326 | group->force_to_v_offset(focus_item->layout_v_offset() + | |
327 | focus_item->v_extents().first); | |
328 | ||
329 | for (size_t i = 0; i < selected_items.size(); i++) { | |
330 | const shared_ptr<RowItem> &r = selected_items[i]; | |
331 | assert(r->owner()); | |
332 | r->owner()->remove_child_item(r); | |
333 | group->add_child_item(r); | |
334 | ||
335 | // Put the items at 1-pixel offsets, so that restack will | |
336 | // stack them in the right order | |
337 | r->set_layout_v_offset(i); | |
338 | } | |
339 | } | |
340 | ||
341 | void Header::on_ungroup() | |
342 | { | |
343 | bool restart; | |
344 | do { | |
345 | restart = false; | |
346 | for (const shared_ptr<RowItem> r : view_) { | |
347 | const shared_ptr<TraceGroup> tg = | |
348 | dynamic_pointer_cast<TraceGroup>(r); | |
349 | if (tg && tg->selected()) { | |
350 | tg->ungroup(); | |
351 | restart = true; | |
352 | break; | |
353 | } | |
354 | } | |
355 | } while(restart); | |
356 | } | |
357 | ||
358 | } // namespace view | |
359 | } // namespace pv |