1 // circle.cpp: Circle object
3 // Part of the Architektonas Project
4 // (C) 2011 Underground Software
5 // See the README and GPLv3 files for licensing and warranty information
7 // JLH = James Hammons <jlhamm@acm.org>
10 // --- ---------- ------------------------------------------------------------
11 // JLH 03/28/2011 Created this file
12 // JLH 09/26/2011 Added hover effects
13 // JLH 09/26/2011 Major cleanup of this class
22 Circle::Circle(Vector p1, double r, Object * p/*= NULL*/): Object(p1, p), radius(r),
23 draggingEdge(false), draggingCenter(false), hitCenter(false), hitCircle(false)
34 /*virtual*/ void Circle::Draw(Painter * painter)
36 if (state == OSSelected || hitCircle || hitCenter)
37 painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
39 painter->SetPen(QPen(Qt::black, 1.0, Qt::SolidLine));
42 // QBrush brush(Qt::DiagCrossPattern);
43 // brush.setColor(QColor(255, 255, 0));
44 // painter->SetBrush(brush);
45 painter->SetBrush(QBrush(Qt::NoBrush));
48 painter->DrawEllipse(position, radius, radius);
50 // & draw handles (if needed)
51 if (state == OSSelected || hitCenter)
52 painter->DrawHandle(position);
54 if (state == OSSelected && draggingEdge && objectWasDragged)
55 painter->DrawHandle(dragPoint);
57 // If resizing the circle, draw an information panel showing the new radius.
60 QString text = QObject::tr("Radius: %1\nScale: %2%");
61 text = text.arg(radius, 0, 'd', 4).arg(radius / oldRadius * 100.0, 0, 'd', 0);
63 QPen pen = QPen(QColor(0x00, 0xFF, 0x00), 1.0, Qt::SolidLine);
65 painter->SetBrush(QBrush(QColor(0x40, 0xFF, 0x40, 0x9F)));
66 QRectF textRect(10.0, 10.0, 270.0, 70.0); // x, y, w, h
67 painter->DrawRoundedRect(textRect, 7.0, 7.0);
69 textRect.setLeft(textRect.left() + 14);
70 painter->SetFont(*Object::font);
71 pen = QPen(QColor(0x00, 0x5F, 0xDF));
73 painter->DrawText(textRect, Qt::AlignVCenter, text);
78 /*virtual*/ Vector Circle::Center(void)
84 /*virtual*/ bool Circle::Collided(Vector point)
86 // We can assume this, since this is a mouse down event here.
87 objectWasDragged = false;
90 draggingCenter = hitCenter;
91 draggingEdge = hitCircle;
93 if (hitCenter || hitCircle)
102 // We didn't hit anything, so deselect this object and report failure to hit
108 /*virtual*/ void Circle::PointerMoved(Vector point)
110 if (selectionInProgress)
112 // Check for whether or not the rect contains this circle
113 // if (selection.normalized().contains(Extents()))
114 if (selection.contains(Extents()))
122 // Hit test tells us what we hit (if anything) through boolean variables. It
123 // also tells us whether or not the state changed.
126 needUpdate = HitStateChanged();
127 objectWasDragged = (draggingEdge | draggingCenter);
129 if (objectWasDragged)
133 radius = Vector::Magnitude(point, position);
134 else if (draggingCenter)
137 // Save this point so the rendering code knows where to draw the handle...
142 /*virtual*/ void Circle::PointerReleased(void)
144 // Mouse went up, so our dragging is done (if any *was* done, that is)
145 draggingEdge = draggingCenter = false;
146 hitCenter = hitCircle = false;
148 // If the object was dragged, then revert to the old state.
149 // Otherwise, we were probably just clicked, and want to stay in the selected state.
150 if (objectWasDragged)
155 /*virtual*/ bool Circle::HitTest(Point point)
158 hitCenter = hitCircle = false;
159 double length = Vector::Magnitude(position, point);
160 //printf("Circle::length = %lf, radius = %lf\n", length, radius);
161 //How to translate this into pixels from Document space???
162 //Maybe we need to pass a scaling factor in here from the caller? That would make sense, as
163 //the caller knows about the zoom factor and all that good kinda crap
165 Document passes in the correct Cartesian coordinates being pointed to by the mouse.
166 So all we have to be concerned with is properly scaling our hot zones/handle sizes,
167 since we generally *don't* want those to scale with the zoom level. ;-)
169 What is going on here?
170 If we're zoomed out to, say, 50%, & our radius is 10.0 (absolute), then on screen
171 the radius will be 5.0. By multiplying the length by the zoom factor, we align our
172 pointed at length with our on screen length.
174 if ((length * Painter::zoom) < 8.0)
176 //wrong: else if ((length < (radius + 2.0)) && (length > (radius - 2.0)))
177 /*NB: The following should be identical to what we have down below, but it doesn't work out that way... :-P */
178 //close, but no else if (((length * Painter::zoom) < ((radius * Painter::zoom) + 2.0)) && ((length * Painter::zoom) > ((radius * Painter::zoom) - 2.0)))
179 //really wrong! else if (((length * Painter::zoom) < (radius + 2.0)) && ((length * Painter::zoom) > (radius - 2.0)))
180 // close again, but sill no else if (((length * Painter::zoom) < ((radius + 2.0) * Painter::zoom)) && ((length * Painter::zoom) > ((radius - 2.0) * Painter::zoom)))
181 else if ((fabs(length - radius) * Painter::zoom) < 2.0)
184 // return HitStateChanged();
185 return (hitCenter || hitCircle ? true : false);
189 /*virtual*/ QRectF Circle::Extents(void)
191 return QRectF(QPointF(position.x - radius, position.y - radius), QPointF(position.x + radius, position.y + radius));
195 void Circle::SaveHitState(void)
197 oldHitCenter = hitCenter;
198 oldHitCircle = hitCircle;
202 bool Circle::HitStateChanged(void)
204 if ((hitCenter != oldHitCenter) || (hitCircle != oldHitCircle))
211 /*virtual*/ void Circle::Enumerate(FILE * file)
213 fprintf(file, "CIRCLE (%lf,%lf) %lf\n", position.x, position.y, radius);
217 /*virtual*/ Object * Circle::Copy(void)
219 #warning "!!! This doesn't take care of attached Dimensions !!!"
221 This is a real problem. While having a pointer in the Dimension to this line's points
222 is fast & easy, it creates a huge problem when trying to replicate an object like this.
224 Maybe a way to fix that then, is to have reference numbers instead of pointers. That
225 way, if you copy them, ... you might still have problems. Because you can't be sure if
226 a copy will be persistant or not, you then *definitely* do not want them to have the
227 same reference number.
229 return new Circle(position, radius, parent);