1 /*
2 Scan Tailor - Interactive post-processing tool for scanned pages.
3 Copyright (C) Joseph Artsimovich <joseph.artsimovich@gmail.com>
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include "UnremoveButton.h"
20 #include <QMouseEvent>
21 #include <QPainter>
22
23 namespace page_split {
UnremoveButton(const PositionGetter & position_getter)24 UnremoveButton::UnremoveButton(const PositionGetter& position_getter)
25 : m_positionGetter(position_getter),
26 m_clickCallback(&UnremoveButton::noOp),
27 m_defaultPixmap(":/icons/trashed-big.png"),
28 m_hoveredPixmap(":/icons/untrash-big.png"),
29 m_wasHovered(false) {
30 m_proximityInteraction.setProximityCursor(Qt::PointingHandCursor);
31 m_proximityInteraction.setProximityStatusTip(tr("Restore removed page."));
32 }
33
onPaint(QPainter & painter,const InteractionState & interaction)34 void UnremoveButton::onPaint(QPainter& painter, const InteractionState& interaction) {
35 const QPixmap& pixmap = interaction.proximityLeader(m_proximityInteraction) ? m_hoveredPixmap : m_defaultPixmap;
36
37 QRectF rect(pixmap.rect());
38 rect.moveCenter(m_positionGetter());
39
40 painter.setWorldTransform(QTransform());
41 painter.drawPixmap(rect.topLeft(), pixmap);
42 }
43
onProximityUpdate(const QPointF & screen_mouse_pos,InteractionState & interaction)44 void UnremoveButton::onProximityUpdate(const QPointF& screen_mouse_pos, InteractionState& interaction) {
45 QRectF rect(m_defaultPixmap.rect());
46 rect.moveCenter(m_positionGetter());
47
48 const bool hovered = rect.contains(screen_mouse_pos);
49 if (hovered != m_wasHovered) {
50 m_wasHovered = hovered;
51 interaction.setRedrawRequested(true);
52 }
53
54 interaction.updateProximity(m_proximityInteraction, Proximity::fromSqDist(hovered ? 0.0 : 1e10));
55 }
56
onMousePressEvent(QMouseEvent * event,InteractionState & interaction)57 void UnremoveButton::onMousePressEvent(QMouseEvent* event, InteractionState& interaction) {
58 if (!interaction.captured() && interaction.proximityLeader(m_proximityInteraction)) {
59 event->accept();
60 m_clickCallback();
61 }
62 }
63
setClickCallback(const UnremoveButton::ClickCallback & callback)64 void UnremoveButton::setClickCallback(const UnremoveButton::ClickCallback& callback) {
65 m_clickCallback = callback;
66 }
67
noOp()68 void UnremoveButton::noOp() {}
69 } // namespace page_split
