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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2014 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 <QApplication> | |
22 | #include <QMouseEvent> | |
23 | #include <QTouchEvent> | |
24 | ||
25 | #include "tracetreeitem.hpp" | |
26 | #include "view.hpp" | |
27 | #include "viewwidget.hpp" | |
28 | ||
29 | using std::any_of; | |
30 | using std::shared_ptr; | |
31 | using std::vector; | |
32 | ||
33 | namespace pv { | |
34 | namespace view { | |
35 | ||
36 | ViewWidget::ViewWidget(View &parent) : | |
37 | QWidget(&parent), | |
38 | view_(parent), | |
39 | item_dragging_(false) | |
40 | { | |
41 | setFocusPolicy(Qt::ClickFocus); | |
42 | setAttribute(Qt::WA_AcceptTouchEvents, true); | |
43 | setMouseTracking(true); | |
44 | } | |
45 | ||
46 | void ViewWidget::clear_selection() | |
47 | { | |
48 | const auto items = this->items(); | |
49 | for (auto &i : items) | |
50 | i->select(false); | |
51 | } | |
52 | ||
53 | void ViewWidget::item_hover(const shared_ptr<ViewItem> &item) | |
54 | { | |
55 | (void)item; | |
56 | } | |
57 | ||
58 | void ViewWidget::item_clicked(const shared_ptr<ViewItem> &item) | |
59 | { | |
60 | (void)item; | |
61 | } | |
62 | ||
63 | bool ViewWidget::accept_drag() const | |
64 | { | |
65 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
66 | const vector< shared_ptr<TraceTreeItem> > trace_tree_items( | |
67 | view_.list_by_type<TraceTreeItem>()); | |
68 | ||
69 | const bool any_row_items_selected = any_of( | |
70 | trace_tree_items.begin(), trace_tree_items.end(), | |
71 | [](const shared_ptr<TraceTreeItem> &r) { return r->selected(); }); | |
72 | ||
73 | const bool any_time_items_selected = any_of(items.begin(), items.end(), | |
74 | [](const shared_ptr<TimeItem> &i) { return i->selected(); }); | |
75 | ||
76 | if (any_row_items_selected && !any_time_items_selected) | |
77 | { | |
78 | // Check all the drag items share a common owner | |
79 | TraceTreeItemOwner *item_owner = nullptr; | |
80 | for (shared_ptr<TraceTreeItem> r : trace_tree_items) | |
81 | if (r->dragging()) { | |
82 | if (!item_owner) | |
83 | item_owner = r->owner(); | |
84 | else if (item_owner != r->owner()) | |
85 | return false; | |
86 | } | |
87 | ||
88 | return true; | |
89 | } | |
90 | else if (any_time_items_selected && !any_row_items_selected) | |
91 | { | |
92 | return true; | |
93 | } | |
94 | ||
95 | // A background drag is beginning | |
96 | return true; | |
97 | } | |
98 | ||
99 | bool ViewWidget::mouse_down() const | |
100 | { | |
101 | return mouse_down_point_.x() != INT_MIN && | |
102 | mouse_down_point_.y() != INT_MIN; | |
103 | } | |
104 | ||
105 | void ViewWidget::drag_items(const QPoint &delta) | |
106 | { | |
107 | bool item_dragged = false; | |
108 | ||
109 | // Drag the row items | |
110 | TraceTreeItemOwner *item_owner = nullptr; | |
111 | const vector< shared_ptr<TraceTreeItem> > trace_tree_items( | |
112 | view_.list_by_type<TraceTreeItem>()); | |
113 | for (shared_ptr<TraceTreeItem> r : trace_tree_items) | |
114 | if (r->dragging()) { | |
115 | item_owner = r->owner(); | |
116 | r->drag_by(delta); | |
117 | ||
118 | // Ensure the trace is selected | |
119 | r->select(); | |
120 | } | |
121 | ||
122 | if (item_owner) { | |
123 | item_dragged = true; | |
124 | item_owner->restack_items(); | |
125 | for (shared_ptr<TraceTreeItem> r : trace_tree_items) | |
126 | r->animate_to_layout_v_offset(); | |
127 | } | |
128 | ||
129 | // Drag the time items | |
130 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
131 | for (auto &i : items) | |
132 | if (i->dragging()) { | |
133 | i->drag_by(delta); | |
134 | item_dragged = true; | |
135 | } | |
136 | ||
137 | // Do the background drag | |
138 | if (!item_dragged) | |
139 | drag_by(delta); | |
140 | } | |
141 | ||
142 | void ViewWidget::drag() | |
143 | { | |
144 | } | |
145 | ||
146 | void ViewWidget::drag_by(const QPoint &delta) | |
147 | { | |
148 | (void)delta; | |
149 | } | |
150 | ||
151 | void ViewWidget::drag_release() | |
152 | { | |
153 | } | |
154 | ||
155 | void ViewWidget::mouse_left_press_event(QMouseEvent *event) | |
156 | { | |
157 | (void)event; | |
158 | ||
159 | const bool ctrl_pressed = | |
160 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
161 | ||
162 | // Clear selection if control is not pressed and this item is unselected | |
163 | if ((!mouse_down_item_ || !mouse_down_item_->selected()) && | |
164 | !ctrl_pressed) | |
165 | clear_selection(); | |
166 | ||
167 | // Set the signal selection state if the item has been clicked | |
168 | if (mouse_down_item_) { | |
169 | if (ctrl_pressed) | |
170 | mouse_down_item_->select(!mouse_down_item_->selected()); | |
171 | else | |
172 | mouse_down_item_->select(true); | |
173 | } | |
174 | ||
175 | // Save the offsets of any signals which will be dragged | |
176 | bool item_dragged = false; | |
177 | const auto items = this->items(); | |
178 | for (auto &i : items) | |
179 | if (i->selected()) { | |
180 | item_dragged = true; | |
181 | i->drag(); | |
182 | } | |
183 | ||
184 | // Do the background drag | |
185 | if (!item_dragged) | |
186 | drag(); | |
187 | ||
188 | selection_changed(); | |
189 | } | |
190 | ||
191 | void ViewWidget::mouse_left_release_event(QMouseEvent *event) | |
192 | { | |
193 | assert(event); | |
194 | ||
195 | auto items = this->items(); | |
196 | const bool ctrl_pressed = | |
197 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
198 | ||
199 | // Unselect everything if control is not pressed | |
200 | const shared_ptr<ViewItem> mouse_over = | |
201 | get_mouse_over_item(event->pos()); | |
202 | ||
203 | for (auto &i : items) | |
204 | i->drag_release(); | |
205 | ||
206 | if (item_dragging_) | |
207 | view_.restack_all_trace_tree_items(); | |
208 | else | |
209 | { | |
210 | if (!ctrl_pressed) { | |
211 | for (shared_ptr<ViewItem> i : items) | |
212 | if (mouse_down_item_ != i) | |
213 | i->select(false); | |
214 | ||
215 | if (mouse_down_item_) | |
216 | item_clicked(mouse_down_item_); | |
217 | } | |
218 | } | |
219 | ||
220 | item_dragging_ = false; | |
221 | } | |
222 | ||
223 | bool ViewWidget::touch_event(QTouchEvent *e) | |
224 | { | |
225 | (void)e; | |
226 | return false; | |
227 | } | |
228 | ||
229 | bool ViewWidget::event(QEvent *event) | |
230 | { | |
231 | switch (event->type()) { | |
232 | case QEvent::TouchBegin: | |
233 | case QEvent::TouchUpdate: | |
234 | case QEvent::TouchEnd: | |
235 | if (touch_event(static_cast<QTouchEvent *>(event))) | |
236 | return true; | |
237 | break; | |
238 | ||
239 | default: | |
240 | break; | |
241 | } | |
242 | ||
243 | return QWidget::event(event); | |
244 | } | |
245 | ||
246 | void ViewWidget::mousePressEvent(QMouseEvent *event) | |
247 | { | |
248 | assert(event); | |
249 | ||
250 | mouse_down_point_ = event->pos(); | |
251 | mouse_down_item_ = get_mouse_over_item(event->pos()); | |
252 | ||
253 | if (event->button() & Qt::LeftButton) | |
254 | mouse_left_press_event(event); | |
255 | } | |
256 | ||
257 | void ViewWidget::mouseReleaseEvent(QMouseEvent *event) | |
258 | { | |
259 | assert(event); | |
260 | if (event->button() & Qt::LeftButton) | |
261 | mouse_left_release_event(event); | |
262 | ||
263 | mouse_down_point_ = QPoint(INT_MIN, INT_MIN); | |
264 | mouse_down_item_ = nullptr; | |
265 | } | |
266 | ||
267 | void ViewWidget::mouseMoveEvent(QMouseEvent *e) | |
268 | { | |
269 | assert(e); | |
270 | mouse_point_ = e->pos(); | |
271 | ||
272 | if (!e->buttons()) | |
273 | item_hover(get_mouse_over_item(e->pos())); | |
274 | else if (e->buttons() & Qt::LeftButton) | |
275 | { | |
276 | if (!item_dragging_) | |
277 | { | |
278 | if ((e->pos() - mouse_down_point_).manhattanLength() < | |
279 | QApplication::startDragDistance()) | |
280 | return; | |
281 | ||
282 | if (!accept_drag()) | |
283 | return; | |
284 | ||
285 | item_dragging_ = true; | |
286 | } | |
287 | ||
288 | // Do the drag | |
289 | drag_items(e->pos() - mouse_down_point_); | |
290 | ||
291 | update(); | |
292 | } | |
293 | } | |
294 | ||
295 | void ViewWidget::leaveEvent(QEvent*) | |
296 | { | |
297 | mouse_point_ = QPoint(-1, -1); | |
298 | update(); | |
299 | } | |
300 | ||
301 | } // namespace view | |
302 | } // namespace pv |