1 /*
2 This file is part of the KDE libraries
3 SPDX-FileCopyrightText: 1997 Martin Jones <mjones@kde.org>
4
5 SPDX-License-Identifier: LGPL-2.0-or-later
6 */
7
8 #include "kxyselector.h"
9
10 #include "loggingcategory.h"
11
12 #include <QMouseEvent>
13 #include <QPainter>
14 #include <QStyle>
15 #include <QStyleOptionFrame>
16
17 //-----------------------------------------------------------------------------
18 /*
19 * 2D value selector.
20 * The contents of the selector are drawn by derived class.
21 */
22
23 class KXYSelectorPrivate
24 {
25 public:
KXYSelectorPrivate(KXYSelector * qq)26 KXYSelectorPrivate(KXYSelector *qq)
27 : q(qq)
28 , xPos(0)
29 , yPos(0)
30 , minX(0)
31 , maxX(100)
32 , minY(0)
33 , maxY(100)
34 , m_markerColor(Qt::white)
35 {
36 }
37
38 void setValues(int _xPos, int _yPos);
39
40 KXYSelector *const q;
41 int px;
42 int py;
43 int xPos;
44 int yPos;
45 int minX;
46 int maxX;
47 int minY;
48 int maxY;
49 QColor m_markerColor;
50 };
51
KXYSelector(QWidget * parent)52 KXYSelector::KXYSelector(QWidget *parent)
53 : QWidget(parent)
54 , d(new KXYSelectorPrivate(this))
55 {
56 }
57
58 KXYSelector::~KXYSelector() = default;
59
xValue() const60 int KXYSelector::xValue() const
61 {
62 return d->xPos;
63 }
64
yValue() const65 int KXYSelector::yValue() const
66 {
67 return d->yPos;
68 }
69
setRange(int _minX,int _minY,int _maxX,int _maxY)70 void KXYSelector::setRange(int _minX, int _minY, int _maxX, int _maxY)
71 {
72 if (_maxX == _minX) {
73 qCWarning(KWidgetsAddonsLog) << "KXYSelector::setRange invalid range: " << _maxX << " == " << _minX << " (for X) ";
74 return;
75 }
76 if (_maxY == _minY) {
77 qCWarning(KWidgetsAddonsLog) << "KXYSelector::setRange invalid range: " << _maxY << " == " << _minY << " (for Y) ";
78 return;
79 }
80
81 int w = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
82 d->px = w;
83 d->py = w;
84 d->minX = _minX;
85 d->minY = _minY;
86 d->maxX = _maxX;
87 d->maxY = _maxY;
88 }
89
setXValue(int _xPos)90 void KXYSelector::setXValue(int _xPos)
91 {
92 setValues(_xPos, d->yPos);
93 }
94
setYValue(int _yPos)95 void KXYSelector::setYValue(int _yPos)
96 {
97 setValues(d->xPos, _yPos);
98 }
99
setValues(int _xPos,int _yPos)100 void KXYSelector::setValues(int _xPos, int _yPos)
101 {
102 d->setValues(_xPos, _yPos);
103 }
104
setValues(int _xPos,int _yPos)105 void KXYSelectorPrivate::setValues(int _xPos, int _yPos)
106 {
107 int w = q->style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
108
109 xPos = _xPos;
110 yPos = _yPos;
111
112 if (xPos > maxX) {
113 xPos = maxX;
114 } else if (xPos < minX) {
115 xPos = minX;
116 }
117
118 if (yPos > maxY) {
119 yPos = maxY;
120 } else if (yPos < minY) {
121 yPos = minY;
122 }
123
124 Q_ASSERT(maxX != minX);
125 int xp = w + (q->width() - 2 * w) * xPos / (maxX - minX);
126
127 Q_ASSERT(maxY != minY);
128 int yp = q->height() - w - (q->height() - 2 * w) * yPos / (maxY - minY);
129
130 q->setPosition(xp, yp);
131 }
132
setMarkerColor(const QColor & col)133 void KXYSelector::setMarkerColor(const QColor &col)
134 {
135 d->m_markerColor = col;
136 }
137
contentsRect() const138 QRect KXYSelector::contentsRect() const
139 {
140 int w = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
141 return rect().adjusted(w, w, -w, -w);
142 }
143
minimumSizeHint() const144 QSize KXYSelector::minimumSizeHint() const
145 {
146 int w = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
147 return QSize(2 * w, 2 * w);
148 }
149
paintEvent(QPaintEvent *)150 void KXYSelector::paintEvent(QPaintEvent * /* ev */)
151 {
152 QStyleOptionFrame opt;
153 opt.initFrom(this);
154
155 QPainter painter;
156 painter.begin(this);
157
158 drawContents(&painter);
159 drawMarker(&painter, d->px, d->py);
160
161 style()->drawPrimitive(QStyle::PE_Frame, &opt, &painter, this);
162
163 painter.end();
164 }
165
mousePressEvent(QMouseEvent * e)166 void KXYSelector::mousePressEvent(QMouseEvent *e)
167 {
168 mouseMoveEvent(e);
169 }
170
mouseMoveEvent(QMouseEvent * e)171 void KXYSelector::mouseMoveEvent(QMouseEvent *e)
172 {
173 int xVal;
174 int yVal;
175 int w = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
176 valuesFromPosition(e->pos().x() - w, e->pos().y() - w, xVal, yVal);
177 setValues(xVal, yVal);
178
179 Q_EMIT valueChanged(d->xPos, d->yPos);
180 }
181
wheelEvent(QWheelEvent * e)182 void KXYSelector::wheelEvent(QWheelEvent *e)
183 {
184 setValues(xValue() + e->angleDelta().x() / 120, yValue() + e->angleDelta().y() / 120);
185 Q_EMIT valueChanged(d->xPos, d->yPos);
186 }
187
valuesFromPosition(int x,int y,int & xVal,int & yVal) const188 void KXYSelector::valuesFromPosition(int x, int y, int &xVal, int &yVal) const
189 {
190 int w = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
191
192 xVal = ((d->maxX - d->minX) * (x - w)) / (width() - 2 * w);
193 yVal = d->maxY - (((d->maxY - d->minY) * (y - w)) / (height() - 2 * w));
194
195 if (xVal > d->maxX) {
196 xVal = d->maxX;
197 } else if (xVal < d->minX) {
198 xVal = d->minX;
199 }
200
201 if (yVal > d->maxY) {
202 yVal = d->maxY;
203 } else if (yVal < d->minY) {
204 yVal = d->minY;
205 }
206 }
207
setPosition(int xp,int yp)208 void KXYSelector::setPosition(int xp, int yp)
209 {
210 int w = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
211
212 if (xp < w) {
213 xp = w;
214 } else if (xp > width() - w) {
215 xp = width() - w;
216 }
217
218 if (yp < w) {
219 yp = w;
220 } else if (yp > height() - w) {
221 yp = height() - w;
222 }
223
224 d->px = xp;
225 d->py = yp;
226
227 update();
228 }
229
drawContents(QPainter *)230 void KXYSelector::drawContents(QPainter *)
231 {
232 }
233
drawMarker(QPainter * p,int xp,int yp)234 void KXYSelector::drawMarker(QPainter *p, int xp, int yp)
235 {
236 QPen pen(d->m_markerColor);
237 p->setPen(pen);
238
239 /*
240 p->drawLine( xp - 6, yp - 6, xp - 2, yp - 2 );
241 p->drawLine( xp - 6, yp + 6, xp - 2, yp + 2 );
242 p->drawLine( xp + 6, yp - 6, xp + 2, yp - 2 );
243 p->drawLine( xp + 6, yp + 6, xp + 2, yp + 2 );
244 */
245 p->drawEllipse(xp - 4, yp - 4, 8, 8);
246 }
247