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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.h" | |
22 | #include "view.h" | |
23 | ||
24 | #include "signal.h" | |
25 | #include "../sigsession.h" | |
26 | ||
27 | #include <cassert> | |
28 | #include <algorithm> | |
29 | ||
30 | #include <QApplication> | |
31 | #include <QMenu> | |
32 | #include <QMouseEvent> | |
33 | #include <QPainter> | |
34 | #include <QRect> | |
35 | ||
36 | #include <pv/widgets/popup.h> | |
37 | ||
38 | using std::max; | |
39 | using std::make_pair; | |
40 | using std::pair; | |
41 | using std::shared_ptr; | |
42 | using std::stable_sort; | |
43 | using std::vector; | |
44 | ||
45 | namespace pv { | |
46 | namespace view { | |
47 | ||
48 | const int Header::Padding = 12; | |
49 | const int Header::BaselineOffset = 5; | |
50 | ||
51 | Header::Header(View &parent) : | |
52 | MarginWidget(parent), | |
53 | _dragging(false) | |
54 | { | |
55 | setFocusPolicy(Qt::ClickFocus); | |
56 | setMouseTracking(true); | |
57 | ||
58 | connect(&_view, SIGNAL(signals_moved()), | |
59 | this, SLOT(on_signals_moved())); | |
60 | } | |
61 | ||
62 | QSize Header::sizeHint() const | |
63 | { | |
64 | QRectF max_rect(-Padding, 0, Padding, 0); | |
65 | for (auto &i : _view) | |
66 | if (i->enabled()) | |
67 | max_rect = max_rect.united(i->label_rect(0)); | |
68 | return QSize(max_rect.width() + Padding + BaselineOffset, 0); | |
69 | } | |
70 | ||
71 | shared_ptr<RowItem> Header::get_mouse_over_row_item(const QPoint &pt) | |
72 | { | |
73 | const int w = width() - BaselineOffset; | |
74 | for (auto &i : _view) | |
75 | if (i->enabled() && i->label_rect(w).contains(pt)) | |
76 | return i; | |
77 | return shared_ptr<RowItem>(); | |
78 | } | |
79 | ||
80 | void Header::clear_selection() | |
81 | { | |
82 | for (auto &i : _view) | |
83 | i->select(false); | |
84 | update(); | |
85 | } | |
86 | ||
87 | void Header::show_popup(const shared_ptr<RowItem> &item) | |
88 | { | |
89 | using pv::widgets::Popup; | |
90 | ||
91 | Popup *const p = item->create_popup(&_view); | |
92 | if (!p) | |
93 | return; | |
94 | ||
95 | const QPoint pt(width() - BaselineOffset, item->get_visual_y()); | |
96 | p->set_position(mapToGlobal(pt), Popup::Right); | |
97 | p->show(); | |
98 | } | |
99 | ||
100 | void Header::paintEvent(QPaintEvent*) | |
101 | { | |
102 | // The trace labels are not drawn with the arrows exactly on the | |
103 | // left edge of the widget, because then the selection shadow | |
104 | // would be clipped away. | |
105 | const int w = width() - BaselineOffset; | |
106 | ||
107 | vector< shared_ptr<RowItem> > row_items( | |
108 | _view.begin(), _view.end()); | |
109 | ||
110 | stable_sort(row_items.begin(), row_items.end(), | |
111 | [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) { | |
112 | return a->visual_v_offset() < b->visual_v_offset(); }); | |
113 | ||
114 | QPainter painter(this); | |
115 | painter.setRenderHint(QPainter::Antialiasing); | |
116 | ||
117 | for (const shared_ptr<RowItem> r : row_items) | |
118 | { | |
119 | assert(r); | |
120 | ||
121 | const bool highlight = !_dragging && | |
122 | r->label_rect(w).contains(_mouse_point); | |
123 | r->paint_label(painter, w, highlight); | |
124 | } | |
125 | ||
126 | painter.end(); | |
127 | } | |
128 | ||
129 | void Header::mouseLeftPressEvent(QMouseEvent *event) | |
130 | { | |
131 | (void)event; | |
132 | ||
133 | const bool ctrl_pressed = | |
134 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
135 | ||
136 | // Clear selection if control is not pressed and this item is unselected | |
137 | if ((!_mouse_down_item || !_mouse_down_item->selected()) && | |
138 | !ctrl_pressed) | |
139 | for (shared_ptr<RowItem> r : _view) | |
140 | r->select(false); | |
141 | ||
142 | // Set the signal selection state if the item has been clicked | |
143 | if (_mouse_down_item) { | |
144 | if (ctrl_pressed) | |
145 | _mouse_down_item->select(!_mouse_down_item->selected()); | |
146 | else | |
147 | _mouse_down_item->select(true); | |
148 | } | |
149 | ||
150 | // Save the offsets of any signals which will be dragged | |
151 | for (const shared_ptr<RowItem> r : _view) | |
152 | if (r->selected()) | |
153 | r->drag(); | |
154 | ||
155 | selection_changed(); | |
156 | update(); | |
157 | } | |
158 | ||
159 | void Header::mousePressEvent(QMouseEvent *event) | |
160 | { | |
161 | assert(event); | |
162 | ||
163 | _mouse_down_point = event->pos(); | |
164 | _mouse_down_item = get_mouse_over_row_item(event->pos()); | |
165 | ||
166 | if (event->button() & Qt::LeftButton) | |
167 | mouseLeftPressEvent(event); | |
168 | } | |
169 | ||
170 | void Header::mouseLeftReleaseEvent(QMouseEvent *event) | |
171 | { | |
172 | assert(event); | |
173 | ||
174 | const bool ctrl_pressed = | |
175 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
176 | ||
177 | // Unselect everything if control is not pressed | |
178 | const shared_ptr<RowItem> mouse_over = | |
179 | get_mouse_over_row_item(event->pos()); | |
180 | ||
181 | for (auto &r : _view) | |
182 | r->drag_release(); | |
183 | ||
184 | if (!_dragging) | |
185 | { | |
186 | if (!ctrl_pressed) { | |
187 | for (shared_ptr<RowItem> r : _view) | |
188 | if (_mouse_down_item != r) | |
189 | r->select(false); | |
190 | ||
191 | if (_mouse_down_item) | |
192 | show_popup(_mouse_down_item); | |
193 | } | |
194 | } | |
195 | ||
196 | _dragging = false; | |
197 | } | |
198 | ||
199 | void Header::mouseReleaseEvent(QMouseEvent *event) | |
200 | { | |
201 | assert(event); | |
202 | if (event->button() & Qt::LeftButton) | |
203 | mouseLeftReleaseEvent(event); | |
204 | ||
205 | _mouse_down_item = nullptr; | |
206 | } | |
207 | ||
208 | void Header::mouseMoveEvent(QMouseEvent *event) | |
209 | { | |
210 | assert(event); | |
211 | _mouse_point = event->pos(); | |
212 | ||
213 | if (!(event->buttons() & Qt::LeftButton)) | |
214 | return; | |
215 | ||
216 | if ((event->pos() - _mouse_down_point).manhattanLength() < | |
217 | QApplication::startDragDistance()) | |
218 | return; | |
219 | ||
220 | // Check all the drag items share a common owner | |
221 | RowItemOwner *item_owner = nullptr; | |
222 | for (shared_ptr<RowItem> r : _view) | |
223 | if (r->dragging()) { | |
224 | if (!item_owner) | |
225 | item_owner = r->owner(); | |
226 | else if(item_owner != r->owner()) | |
227 | return; | |
228 | } | |
229 | ||
230 | if (!item_owner) | |
231 | return; | |
232 | ||
233 | // Do the drag | |
234 | _dragging = true; | |
235 | ||
236 | const int delta = event->pos().y() - _mouse_down_point.y(); | |
237 | ||
238 | for (std::shared_ptr<RowItem> r : _view) | |
239 | if (r->dragging()) { | |
240 | r->force_to_v_offset(r->drag_point().y() + delta); | |
241 | ||
242 | // Ensure the trace is selected | |
243 | r->select(); | |
244 | } | |
245 | ||
246 | signals_moved(); | |
247 | ||
248 | update(); | |
249 | } | |
250 | ||
251 | void Header::leaveEvent(QEvent*) | |
252 | { | |
253 | _mouse_point = QPoint(-1, -1); | |
254 | update(); | |
255 | } | |
256 | ||
257 | void Header::contextMenuEvent(QContextMenuEvent *event) | |
258 | { | |
259 | const shared_ptr<RowItem> r = get_mouse_over_row_item(_mouse_point); | |
260 | if (!r) | |
261 | return; | |
262 | ||
263 | QMenu *const menu = r->create_context_menu(this); | |
264 | if (!menu) | |
265 | return; | |
266 | ||
267 | menu->exec(event->globalPos()); | |
268 | } | |
269 | ||
270 | void Header::keyPressEvent(QKeyEvent *e) | |
271 | { | |
272 | assert(e); | |
273 | ||
274 | switch (e->key()) | |
275 | { | |
276 | case Qt::Key_Delete: | |
277 | { | |
278 | for (const shared_ptr<RowItem> r : _view) | |
279 | if (r->selected()) | |
280 | r->delete_pressed(); | |
281 | break; | |
282 | } | |
283 | } | |
284 | } | |
285 | ||
286 | void Header::on_signals_moved() | |
287 | { | |
288 | update(); | |
289 | } | |
290 | ||
291 | } // namespace view | |
292 | } // namespace pv |