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40aca27e JH |
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 | ||
e9e4e5e7 JH |
21 | #include <QApplication> |
22 | #include <QMouseEvent> | |
b434cbaf JH |
23 | |
24 | #include "rowitem.hpp" | |
40aca27e JH |
25 | #include "view.hpp" |
26 | #include "viewwidget.hpp" | |
27 | ||
b434cbaf JH |
28 | using std::any_of; |
29 | using std::shared_ptr; | |
30 | using std::vector; | |
31 | ||
40aca27e JH |
32 | namespace pv { |
33 | namespace view { | |
34 | ||
35 | ViewWidget::ViewWidget(View &parent) : | |
36 | QWidget(&parent), | |
e9e4e5e7 | 37 | view_(parent), |
803cdac4 | 38 | item_dragging_(false) |
40aca27e | 39 | { |
e9e4e5e7 JH |
40 | setFocusPolicy(Qt::ClickFocus); |
41 | setMouseTracking(true); | |
42 | } | |
43 | ||
44 | void ViewWidget::clear_selection() | |
45 | { | |
46 | const auto items = this->items(); | |
47 | for (auto &i : items) | |
48 | i->select(false); | |
49 | update(); | |
50 | } | |
51 | ||
52 | void ViewWidget::item_clicked(const shared_ptr<ViewItem> &item) | |
53 | { | |
54 | (void)item; | |
40aca27e JH |
55 | } |
56 | ||
b434cbaf JH |
57 | bool ViewWidget::accept_drag() const |
58 | { | |
59 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
60 | ||
61 | const bool any_row_items_selected = any_of(view_.begin(), view_.end(), | |
62 | [](const shared_ptr<RowItem> &r) { return r->selected(); }); | |
63 | ||
64 | const bool any_time_items_selected = any_of(items.begin(), items.end(), | |
65 | [](const shared_ptr<TimeItem> &i) { return i->selected(); }); | |
66 | ||
67 | if (any_row_items_selected && !any_time_items_selected) | |
68 | { | |
69 | // Check all the drag items share a common owner | |
70 | RowItemOwner *item_owner = nullptr; | |
71 | for (shared_ptr<RowItem> r : view_) | |
72 | if (r->dragging()) { | |
73 | if (!item_owner) | |
74 | item_owner = r->owner(); | |
75 | else if(item_owner != r->owner()) | |
76 | return false; | |
77 | } | |
78 | ||
79 | return true; | |
80 | } | |
81 | else if (any_time_items_selected && !any_row_items_selected) | |
82 | { | |
83 | return true; | |
84 | } | |
85 | ||
86 | return false; | |
87 | } | |
88 | ||
1f1edc09 JH |
89 | bool ViewWidget::mouse_down() const |
90 | { | |
91 | return mouse_down_point_.x() != INT_MIN && | |
92 | mouse_down_point_.y() != INT_MIN; | |
93 | } | |
94 | ||
1dffa582 JH |
95 | void ViewWidget::drag_items(const QPoint &delta) |
96 | { | |
97 | // Drag the row items | |
98 | RowItemOwner *item_owner = nullptr; | |
99 | for (std::shared_ptr<RowItem> r : view_) | |
100 | if (r->dragging()) { | |
101 | item_owner = r->owner(); | |
102 | r->drag_by(delta); | |
103 | ||
104 | // Ensure the trace is selected | |
105 | r->select(); | |
106 | } | |
107 | ||
108 | if (item_owner) { | |
109 | item_owner->restack_items(); | |
110 | for (const auto &r : *item_owner) | |
111 | r->animate_to_layout_v_offset(); | |
112 | } | |
113 | ||
114 | // Drag the time items | |
115 | const vector< shared_ptr<TimeItem> > items(view_.time_items()); | |
116 | for (auto &i : items) | |
117 | if (i->dragging()) | |
118 | i->drag_by(delta); | |
119 | } | |
120 | ||
e9e4e5e7 JH |
121 | void ViewWidget::mouse_left_press_event(QMouseEvent *event) |
122 | { | |
123 | (void)event; | |
124 | ||
125 | const bool ctrl_pressed = | |
126 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
127 | ||
128 | // Clear selection if control is not pressed and this item is unselected | |
129 | if ((!mouse_down_item_ || !mouse_down_item_->selected()) && | |
130 | !ctrl_pressed) | |
131 | clear_selection(); | |
132 | ||
133 | // Set the signal selection state if the item has been clicked | |
134 | if (mouse_down_item_) { | |
135 | if (ctrl_pressed) | |
136 | mouse_down_item_->select(!mouse_down_item_->selected()); | |
137 | else | |
138 | mouse_down_item_->select(true); | |
139 | } | |
140 | ||
141 | // Save the offsets of any signals which will be dragged | |
142 | const auto items = this->items(); | |
143 | for (auto &i : items) | |
144 | if (i->selected()) | |
145 | i->drag(); | |
146 | ||
147 | selection_changed(); | |
148 | update(); | |
149 | } | |
150 | ||
151 | void ViewWidget::mouse_left_release_event(QMouseEvent *event) | |
152 | { | |
153 | assert(event); | |
154 | ||
155 | auto items = this->items(); | |
156 | const bool ctrl_pressed = | |
157 | QApplication::keyboardModifiers() & Qt::ControlModifier; | |
158 | ||
159 | // Unselect everything if control is not pressed | |
160 | const shared_ptr<ViewItem> mouse_over = | |
161 | get_mouse_over_item(event->pos()); | |
162 | ||
163 | for (auto &i : items) | |
164 | i->drag_release(); | |
165 | ||
803cdac4 | 166 | if (item_dragging_) |
e9e4e5e7 JH |
167 | view_.restack_all_row_items(); |
168 | else | |
169 | { | |
170 | if (!ctrl_pressed) { | |
171 | for (shared_ptr<ViewItem> i : items) | |
172 | if (mouse_down_item_ != i) | |
173 | i->select(false); | |
174 | ||
175 | if (mouse_down_item_) | |
176 | item_clicked(mouse_down_item_); | |
177 | } | |
178 | } | |
179 | ||
803cdac4 | 180 | item_dragging_ = false; |
e9e4e5e7 JH |
181 | } |
182 | ||
183 | void ViewWidget::mousePressEvent(QMouseEvent *event) | |
184 | { | |
185 | assert(event); | |
186 | ||
187 | mouse_down_point_ = event->pos(); | |
188 | mouse_down_item_ = get_mouse_over_item(event->pos()); | |
189 | ||
190 | if (event->button() & Qt::LeftButton) | |
191 | mouse_left_press_event(event); | |
192 | } | |
193 | ||
194 | void ViewWidget::mouseReleaseEvent(QMouseEvent *event) | |
195 | { | |
196 | assert(event); | |
197 | if (event->button() & Qt::LeftButton) | |
198 | mouse_left_release_event(event); | |
199 | ||
1f1edc09 | 200 | mouse_down_point_ = QPoint(INT_MIN, INT_MIN); |
e9e4e5e7 JH |
201 | mouse_down_item_ = nullptr; |
202 | } | |
203 | ||
204 | void ViewWidget::mouseMoveEvent(QMouseEvent *event) | |
205 | { | |
206 | assert(event); | |
207 | mouse_point_ = event->pos(); | |
208 | ||
209 | if (!(event->buttons() & Qt::LeftButton)) | |
210 | return; | |
211 | ||
212 | if ((event->pos() - mouse_down_point_).manhattanLength() < | |
213 | QApplication::startDragDistance()) | |
214 | return; | |
215 | ||
216 | if (!accept_drag()) | |
217 | return; | |
218 | ||
219 | // Do the drag | |
803cdac4 | 220 | item_dragging_ = true; |
e9e4e5e7 JH |
221 | drag_items(event->pos() - mouse_down_point_); |
222 | ||
223 | update(); | |
224 | } | |
225 | ||
226 | void ViewWidget::leaveEvent(QEvent*) | |
227 | { | |
228 | mouse_point_ = QPoint(-1, -1); | |
229 | update(); | |
230 | } | |
231 | ||
40aca27e JH |
232 | } // namespace view |
233 | } // namespace pv |