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);
75 painter->DrawInformativeText(text);
81 /*virtual*/ Vector Circle::Center(void)
87 /*virtual*/ bool Circle::Collided(Vector point)
89 // We can assume this, since this is a mouse down event here.
90 objectWasDragged = false;
93 // Now that we've done our hit testing on the non-snapped point, snap it if
96 point = SnapPointToGrid(point);
98 draggingCenter = hitCenter;
99 draggingEdge = hitCircle;
101 if (hitCenter || hitCircle)
110 // We didn't hit anything, so deselect this object and report failure to hit
116 /*virtual*/ void Circle::PointerMoved(Vector point)
118 if (selectionInProgress)
120 // Check for whether or not the rect contains this circle
121 // if (selection.normalized().contains(Extents()))
122 if (selection.contains(Extents()))
130 // Hit test tells us what we hit (if anything) through boolean variables. It
131 // also tells us whether or not the state changed.
134 needUpdate = HitStateChanged();
135 objectWasDragged = (draggingEdge | draggingCenter);
137 if (objectWasDragged)
141 radius = Vector::Magnitude(point, position);
142 else if (draggingCenter)
145 // Save this point so the rendering code knows where to draw the handle...
150 /*virtual*/ void Circle::PointerReleased(void)
152 // Mouse went up, so our dragging is done (if any *was* done, that is)
153 draggingEdge = draggingCenter = false;
154 hitCenter = hitCircle = false;
156 // If the object was dragged, then revert to the old state.
157 // Otherwise, we were probably just clicked, and want to stay in the selected state.
158 if (objectWasDragged)
163 /*virtual*/ bool Circle::HitTest(Point point)
166 hitCenter = hitCircle = false;
167 double length = Vector::Magnitude(position, point);
168 //printf("Circle::length = %lf, radius = %lf\n", length, radius);
169 //How to translate this into pixels from Document space???
170 //Maybe we need to pass a scaling factor in here from the caller? That would make sense, as
171 //the caller knows about the zoom factor and all that good kinda crap
173 Document passes in the correct Cartesian coordinates being pointed to by the mouse.
174 So all we have to be concerned with is properly scaling our hot zones/handle sizes,
175 since we generally *don't* want those to scale with the zoom level. ;-)
177 What is going on here?
178 If we're zoomed out to, say, 50%, & our radius is 10.0 (absolute), then on screen
179 the radius will be 5.0. By multiplying the length by the zoom factor, we align our
180 pointed at length with our on screen length.
182 if ((length * Painter::zoom) < 8.0)
184 //wrong: else if ((length < (radius + 2.0)) && (length > (radius - 2.0)))
185 /*NB: The following should be identical to what we have down below, but it doesn't work out that way... :-P */
186 //close, but no else if (((length * Painter::zoom) < ((radius * Painter::zoom) + 2.0)) && ((length * Painter::zoom) > ((radius * Painter::zoom) - 2.0)))
187 //really wrong! else if (((length * Painter::zoom) < (radius + 2.0)) && ((length * Painter::zoom) > (radius - 2.0)))
188 // close again, but sill no else if (((length * Painter::zoom) < ((radius + 2.0) * Painter::zoom)) && ((length * Painter::zoom) > ((radius - 2.0) * Painter::zoom)))
189 else if ((fabs(length - radius) * Painter::zoom) < 2.0)
192 // return HitStateChanged();
193 return (hitCenter || hitCircle ? true : false);
197 /*virtual*/ QRectF Circle::Extents(void)
199 return QRectF(QPointF(position.x - radius, position.y - radius), QPointF(position.x + radius, position.y + radius));
203 void Circle::SaveHitState(void)
205 oldHitCenter = hitCenter;
206 oldHitCircle = hitCircle;
210 bool Circle::HitStateChanged(void)
212 if ((hitCenter != oldHitCenter) || (hitCircle != oldHitCircle))
219 /*virtual*/ void Circle::Enumerate(FILE * file)
221 fprintf(file, "CIRCLE (%lf,%lf) %lf\n", position.x, position.y, radius);
225 /*virtual*/ Object * Circle::Copy(void)
227 #warning "!!! This doesn't take care of attached Dimensions !!!"
229 This is a real problem. While having a pointer in the Dimension to this line's points
230 is fast & easy, it creates a huge problem when trying to replicate an object like this.
232 Maybe a way to fix that then, is to have reference numbers instead of pointers. That
233 way, if you copy them, ... you might still have problems. Because you can't be sure if
234 a copy will be persistant or not, you then *definitely* do not want them to have the
235 same reference number.
237 return new Circle(position, radius, parent);