KSane

selectionitem.cpp
1/*
2 * SPDX-FileCopyrightText: 2008 Kare Sars <kare dot sars at iki dot fi>
3 *
4 * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
5 */
6
7#include "selectionitem.h"
8#include <QGraphicsView>
9#include <QGraphicsScene>
10#include <QCursor>
11#include <QList>
12
13namespace KSaneIface
14{
15
16static const qreal selMargin = 4.0;
17static const QPointF boundMargin(selMargin, selMargin);
18static const qreal addRemMargin = 8.0;
19static const QPointF addRemMarginPoint(addRemMargin, addRemMargin);
20
21struct SelectionItem::Private {
22 QPen penDark;
23 QPen penLight;
24 QPen penAddRemFg;
25 QRectF rect;
26 qreal maxX;
27 qreal maxY;
28 bool hasMaxX;
29 bool hasMaxY;
30 bool hasMax;
31 bool isSaved;
32 bool showAddRem;
33 qreal invZoom;
34 qreal selMargin;
35 QRectF addRemRect;
36 qreal devicePixelRatio;
37
38 bool addButtonEnabled = true;
39};
40
41SelectionItem::SelectionItem(const QRectF &rect) : QGraphicsItem(), d(new Private)
42{
43 d->hasMaxX = false;
44 d->hasMaxY = false;
45 d->hasMax = false;
46 setRect(rect);
47
48 d->penDark.setColor(Qt::black);
49 d->penDark.setStyle(Qt::SolidLine);
50 d->penDark.setWidth(0);
51 d->penLight.setColor(Qt::white);
52 d->penLight.setStyle(Qt::DashLine);
53 d->penLight.setWidth(0);
54
55 // FIXME We should probably use some standard KDE color here and not hard code it
56 d->penAddRemFg.setColor(Qt::darkGreen);
57 d->penAddRemFg.setStyle(Qt::SolidLine);
58 d->penAddRemFg.setWidth(3);
59
60 d->isSaved = false;
61 d->showAddRem = false;
62 d->invZoom = 1;
63 d->selMargin = selMargin;
64
65 d->addRemRect = QRectF(0, 0, 0, 0);
66
67 d->devicePixelRatio = 1.0;
68}
69
70SelectionItem::~SelectionItem()
71{
72 delete d;
73}
74
75void SelectionItem::saveZoom(qreal zoom)
76{
77 if (zoom < 0.00001) {
78 zoom = 0.00001;
79 }
80 d->invZoom = 1 / zoom;
81
82 d->selMargin = selMargin * d->invZoom;
83
84 qreal margin = addRemMargin * d->invZoom;
85 QPointF pMargin = addRemMarginPoint * d->invZoom;
86 d->addRemRect = QRectF(d->rect.center() / d->devicePixelRatio - pMargin, QSizeF(margin * 2.0, margin * 2.0));
87 d->penAddRemFg.setWidthF(3.0 * d->invZoom);
88}
89
90void SelectionItem::setSaved(bool isSaved)
91{
92 if (isSaved) {
93 d->penDark.setColor(Qt::darkBlue);
94 d->penLight.setColor(Qt::red);
95 d->penAddRemFg.setColor(Qt::darkRed);
96 d->isSaved = true;
97 } else {
98 d->penDark.setColor(Qt::black);
99 d->penLight.setColor(Qt::white);
100 d->penAddRemFg.setColor(Qt::darkGreen);
101 d->isSaved = false;
102 }
103}
104
105void SelectionItem::setMaxRight(qreal maxX)
106{
107 d->maxX = maxX;
108 d->hasMaxX = true;
109 if (d->hasMaxY) {
110 d->hasMax = true;
111 }
112}
113
114void SelectionItem::setMaxBottom(qreal maxY)
115{
116 d->maxY = maxY;
117 d->hasMaxY = true;
118 if (d->hasMaxX) {
119 d->hasMax = true;
120 }
121}
122
123SelectionItem::Intersects SelectionItem::intersects(const QPointF &point)
124{
125 bool oldState = d->showAddRem;
126 d->showAddRem = false;
127
128 if ((point.x() < (d->rect.left() - d->selMargin)) ||
129 (point.x() > (d->rect.right() + d->selMargin)) ||
130 (point.y() < (d->rect.top() - d->selMargin)) ||
131 (point.y() > (d->rect.bottom() + d->selMargin))) {
132 if (oldState != d->showAddRem) {
133 update();
134 }
135 return None;
136 }
137
138 if (point.x() < (d->rect.left() + d->selMargin)) {
139 if (oldState != d->showAddRem) {
140 update();
141 }
142 if (point.y() < (d->rect.top() + d->selMargin)) {
143 return TopLeft;
144 }
145 if (point.y() > (d->rect.bottom() - d->selMargin)) {
146 return BottomLeft;
147 }
148 return Left;
149 }
150
151 if (point.x() > (d->rect.right() - d->selMargin)) {
152 if (oldState != d->showAddRem) {
153 update();
154 }
155 if (point.y() < (d->rect.top() + d->selMargin)) {
156 return TopRight;
157 }
158 if (point.y() > (d->rect.bottom() - d->selMargin)) {
159 return BottomRight;
160 }
161 return Right;
162 }
163
164 if (point.y() < (d->rect.top() + d->selMargin)) {
165 if (oldState != d->showAddRem) {
166 update();
167 }
168 return Top;
169 }
170 if (point.y() > (d->rect.bottom() - d->selMargin)) {
171 if (oldState != d->showAddRem) {
172 update();
173 }
174 return Bottom;
175 }
176
177 d->showAddRem = d->addButtonEnabled;
178 if (oldState != d->showAddRem) {
179 update();
180 }
181
182 if (d->addButtonEnabled && d->addRemRect.contains(point / d->devicePixelRatio)) {
183 return AddRemove;
184 }
185 return Move;
186}
187
188void SelectionItem::setRect(const QRectF &rect)
189{
190 prepareGeometryChange();
191 d->rect = rect;
192 d->rect = d->rect.normalized();
193 if (d->hasMax) {
194 if (d->rect.top() < 0) {
195 d->rect.setTop(0);
196 }
197 if (d->rect.left() < 0) {
198 d->rect.setLeft(0);
199 }
200 if (d->rect.right() > d->maxX) {
201 d->rect.setRight(d->maxX);
202 }
203 if (d->rect.bottom() > d->maxY) {
204 d->rect.setBottom(d->maxY);
205 }
206 }
207
208 // calculate the add/remove rectangle
209 qreal margin = addRemMargin * d->invZoom;
210 QPointF pMargin = addRemMarginPoint * d->invZoom;
211 d->addRemRect = QRectF(d->rect.center() / d->devicePixelRatio - pMargin, QSizeF(margin * 2, margin * 2));
212}
213
214QPointF SelectionItem::fixTranslation(QPointF dp)
215{
216 if ((d->rect.left() + dp.x()) < 0) {
217 dp.setX(-d->rect.left());
218 }
219 if ((d->rect.top() + dp.y()) < 0) {
220 dp.setY(-d->rect.top());
221 }
222 if ((d->rect.right() + dp.x()) > d->maxX) {
223 dp.setX(d->maxX - d->rect.right());
224 }
225 if ((d->rect.bottom() + dp.y()) > d->maxY) {
226 dp.setY(d->maxY - d->rect.bottom());
227 }
228 return dp;
229}
230
231QRectF SelectionItem::rect()
232{
233 return d->rect;
234}
235
236qreal SelectionItem::devicePixelRatio() const
237{
238 return d->devicePixelRatio;
239}
240
241void SelectionItem::setDevicePixelRatio(qreal dpr)
242{
243 d->devicePixelRatio = dpr;
244}
245
246QRectF SelectionItem::boundingRect() const
247{
248 const auto dpr = d->devicePixelRatio;
249 QRectF tmp(d->rect.topLeft() / dpr - boundMargin, d->rect.bottomRight() / dpr + boundMargin);
250 return tmp.united(d->addRemRect);
251}
252
253void SelectionItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
254{
255 const auto dpr = d->devicePixelRatio;
256 QRectF rect(d->rect.topLeft() / dpr, d->rect.size() / dpr);
257
258 painter->setPen(d->penDark);
259 painter->drawRect(rect);
260
261 painter->setPen(d->penLight);
262 painter->drawRect(rect);
263
264 if (d->showAddRem) {
265 painter->fillRect(d->addRemRect, QBrush(Qt::white));
266 QLineF minus(d->addRemRect.left() + 3 * d->invZoom, d->addRemRect.center().y(),
267 d->addRemRect.right() - 3 * d->invZoom, d->addRemRect.center().y());
268 painter->setPen(d->penAddRemFg);
269
270 painter->drawLine(minus);
271
272 if (!d->isSaved) {
273 QLineF plus(d->addRemRect.center().x(), d->addRemRect.top() + 3 * d->invZoom,
274 d->addRemRect.center().x(), d->addRemRect.bottom() - 3 * d->invZoom);
275 painter->drawLine(plus);
276 }
277 }
278}
279
280void SelectionItem::setAddButtonEnabled(bool enabled)
281{
282 d->addButtonEnabled = enabled;
283}
284
285
286} // NameSpace KSaneIface
void update(Part *part, const QByteArray &data, qint64 dataSize)
QAction * zoom(const QObject *recvr, const char *slot, QObject *parent)
void drawLine(const QLine &line)
void drawRect(const QRect &rectangle)
void fillRect(const QRect &rectangle, QGradient::Preset preset)
void setPen(Qt::PenStyle style)
void setX(qreal x)
void setY(qreal y)
qreal x() const const
qreal y() const const
QRectF normalized() const const
void setTop(qreal y)
SolidLine
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