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 03/22/2011 Created this file
12 // JLH 09/29/2011 Added middle mouse button panning
17 // - Redo rendering code to *not* use Qt's transform functions, as they are tied
18 // to a left-handed system and we need a right-handed one. [DONE]
25 // Uncomment this for debugging...
27 //#define DEBUGFOO // Various tool debugging...
28 //#define DEBUGTP // Toolpalette debugging...
30 #include "drawingview.h"
35 #include "mathconstants.h"
41 #define BACKGROUND_MAX_SIZE 512
44 //Container DrawingView::document(Vector(0, 0));
47 DrawingView::DrawingView(QWidget * parent/*= NULL*/): QWidget(parent),
48 // The value in the settings file will override this.
49 useAntialiasing(true), numSelected(0), numHovered(0), shiftDown(false),
51 gridBackground(BACKGROUND_MAX_SIZE, BACKGROUND_MAX_SIZE),
52 scale(1.0), offsetX(-10), offsetY(-10),// document(Vector(0, 0)),
53 gridPixels(0), collided(false)//, toolAction(NULL)
55 // document.isTopLevelContainer = true;
56 //wtf? doesn't work except in c++11??? document = { 0 };
57 setBackgroundRole(QPalette::Base);
58 setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
60 Global::gridSpacing = 12.0; // In base units (inch is default)
63 Line * line = new Line(Vector(5, 5), Vector(50, 40), &document);
65 document.Add(new Line(Vector(50, 40), Vector(10, 83), &document));
66 document.Add(new Line(Vector(10, 83), Vector(17, 2), &document));
67 document.Add(new Circle(Vector(100, 100), 36, &document));
68 document.Add(new Circle(Vector(50, 150), 49, &document));
69 document.Add(new Arc(Vector(300, 300), 32, PI / 4.0, PI * 1.3, &document)),
70 document.Add(new Arc(Vector(200, 200), 60, PI / 2.0, PI * 1.5, &document));
72 Dimension * dimension = new Dimension(Vector(0, 0), Vector(0, 0), DTLinear, &document);
73 line->SetDimensionOnLine(dimension);
74 document.Add(dimension);
76 // Alternate way to do the above...
77 line->SetDimensionOnLine();
80 Line * line = new Line;//(Vector(5, 5), Vector(50, 40), &document);
81 line->p[0] = Vector(5, 5);
82 line->p[1] = Vector(50, 40);
84 line->thickness = 2.0;
86 line->color = 0xFF7F00;
87 document.objects.push_back(line);
88 document.objects.push_back(new Line(Vector(50, 40), Vector(10, 83)));
89 document.objects.push_back(new Line(Vector(10, 83), Vector(17, 2)));
90 document.objects.push_back(new Circle(Vector(100, 100), 36));
91 document.objects.push_back(new Circle(Vector(50, 150), 49));
92 document.objects.push_back(new Arc(Vector(300, 300), 32, PI / 4.0, PI * 1.3)),
93 document.objects.push_back(new Arc(Vector(200, 200), 60, PI / 2.0, PI * 1.5));
94 document.objects.push_back(new Dimension(Vector(50, 40), Vector(5, 5)));
95 document.objects.push_back(new Text(Vector(10, 83), "Here is some awesome text!"));
99 Here we set the grid size in pixels--12 in this case. Initially, we have our
100 zoom set to make this represent 12 inches at a zoom factor of 25%. (This is
101 arbitrary.) So, to be able to decouple the grid size from the zoom, we need
102 to be able to set the size of the background grid (which we do here at an
103 arbitrary 12 pixels) to anything we want (within reason, of course :-).
105 The drawing enforces the grid spacing through the drawing->gridSpacing variable.
107 drawing->gridSpacing = 12.0 / Global::zoom;
109 Global::zoom is the zoom factor for the drawing, and all mouse clicks are
110 translated to Cartesian coordinates through this. (Initially, Global::zoom is
111 set to 1.0. SCREEN_ZOOM is set to 1.0/4.0.)
113 Really, the 100% zoom level can be set at *any* zoom level, it's more of a
114 convenience function than any measure of absolutes. Doing things that way we
115 could rid ourselves of the whole SCREEN_ZOOM parameter and all the attendant
116 shittiness that comes with it.
118 However, it seems that SCREEN_ZOOM is used to make text and arrow sizes show up
119 a certain way, which means we should probably create something else in those
120 objects to take its place--like some kind of scale factor. This would seem to
121 imply that certain point sizes actually *do* tie things like fonts to absolute
122 sizes on the screen, but not necessarily because you could have an inch scale
123 with text that is quite small relative to other objects on the screen, which
124 currently you have to zoom in to see (and which blows up the text). Point sizes
125 in an application like this are a bit meaningless; even though an inch is an
126 inch regardless of the zoom level a piece of text can be larger or smaller than
127 this. Maybe this is the case for having a base unit and basing point sizes off
130 Here's what's been figured out. Global::zoom is simply the ratio of pixels to
131 base units. What that means is that if you have a 12px grid with a 6" grid size
132 (& base unit of "inches"), Global::zoom becomes 12px / 6" = 2.0 px/in.
134 Dimensions now have a "size" parameter to set their absolute size in relation
135 to the base unit. ATM, the arrows are drawn in pixels, but also scaled by
136 Global::zoom *and* size. Same with the dimension text; it's drawn at 10pt and
137 scaled the same way as the arrowheads.
139 Need a way to scale line widths as well. :-/ Shouldn't be too difficult, just
140 need a thickness parameter similar to the "size" param for dimensions. (And now
144 SetGridSize(12); // This is in pixels
149 void DrawingView::SetToolActive(Action * action)
154 connect(toolAction, SIGNAL(ObjectReady(Object *)), this,
155 SLOT(AddNewObjectToDocument(Object *)));
156 connect(toolAction, SIGNAL(NeedRefresh()), this, SLOT(HandleActionUpdate()));
162 void DrawingView::SetGridSize(uint32_t size)
165 if (size == gridPixels)
168 // Recreate the background bitmap
170 QPainter pmp(&gridBackground);
171 pmp.fillRect(0, 0, BACKGROUND_MAX_SIZE, BACKGROUND_MAX_SIZE, QColor(240, 240, 240));
172 pmp.setPen(QPen(QColor(210, 210, 255), 2.0, Qt::SolidLine));
174 for(int i=0; i<(BACKGROUND_MAX_SIZE-1); i+=gridPixels)
176 pmp.drawLine(i, 0, i, BACKGROUND_MAX_SIZE - 1);
177 pmp.drawLine(0, i, BACKGROUND_MAX_SIZE - 1, i);
182 // Set up new BG brush & zoom level (pixels per base unit)
183 // Painter::zoom = gridPixels / gridSpacing;
184 Global::zoom = gridPixels / Global::gridSpacing;
185 UpdateGridBackground();
189 void DrawingView::UpdateGridBackground(void)
191 // Transform the origin to Qt coordinates
192 Vector pixmapOrigin = Painter::CartesianToQtCoords(Vector());
193 int x = (int)pixmapOrigin.x;
194 int y = (int)pixmapOrigin.y;
195 // Use mod arithmetic to grab the correct swatch of background
197 Negative numbers still screw it up... Need to think about what we're
198 trying to do here. The fact that it worked with 72 seems to have been pure luck.
199 It seems the problem is negative numbers: We can't let that happen.
200 When taking away the zero, it pops over 1 px at zero, then goes about 1/2 a
203 The bitmap looks like this:
213 @ x = 1, we want it to look like:
215 -+---+---+---+---+---
218 -+---+---+---+---+---
223 Which means we need to grab the sample from x = 3. @ x = -1:
233 Which means we need to grab the sample from x = 1. Which means we have to take
234 the mirror of the modulus of gridPixels.
236 Doing a mod of a negative number is problematic: 1st, the compiler converts the
237 negative number to an unsigned int, then it does the mod. Gets you wrong answers
238 most of the time, unless you use a power of 2. :-P So what we do here is just
239 take the modulus of the negation, which means we don't have to worry about
242 The positive case looks gruesome (and it is) but it boils down to this: We take
243 the modulus of the X coordinate, then mirror it by subtraction from the
244 maximum (in this case, gridPixels). This gives us a number in the range of 1 to
245 gridPixels. But we need the case where the result equalling gridPixels to be
246 zero; so we do another modulus operation on the result to achieve this.
251 x = (gridPixels - (x % gridPixels)) % gridPixels;
256 y = (gridPixels - (y % gridPixels)) % gridPixels;
258 // Here we grab a section of the bigger pixmap, so that the background
259 // *looks* like it's scrolling...
260 QPixmap pm = gridBackground.copy(x, y, gridPixels, gridPixels);
261 QPalette pal = palette();
262 pal.setBrush(backgroundRole(), QBrush(pm));
263 setAutoFillBackground(true);
268 void DrawingView::SetCurrentLayer(int layer)
270 Global::currentLayer = layer;
271 //printf("DrawingView::CurrentLayer = %i\n", layer);
275 QPoint DrawingView::GetAdjustedMousePosition(QMouseEvent * event)
277 // This is undoing the transform, e.g. going from client coords to local coords.
278 // In essence, the height - y is height + (y * -1), the (y * -1) term doing the
279 // conversion of the y-axis from increasing bottom to top.
280 return QPoint(offsetX + event->x(), offsetY + (size().height() - event->y()));
284 QPoint DrawingView::GetAdjustedClientPosition(int x, int y)
286 // VOODOO ALERT (ON Y COMPONENT!!!!) (eh?)
287 // No voodoo here, it's just grouped wrong to see it. It should be:
288 // -offsetY + (size.height() + (y * -1.0)) <-- this is wrong, offsetY should be positive
289 return QPoint(-offsetX + x, (size().height() - (-offsetY + y)) * +1.0);
293 void DrawingView::paintEvent(QPaintEvent * /*event*/)
295 QPainter qtPainter(this);
296 Painter painter(&qtPainter);
299 qtPainter.setRenderHint(QPainter::Antialiasing);
301 Global::viewportHeight = size().height();
303 // Draw coordinate axes
304 painter.SetPen(QPen(Qt::blue, 1.0, Qt::DotLine));
305 painter.DrawLine(0, -16384, 0, 16384);
306 painter.DrawLine(-16384, 0, 16384, 0);
308 // Do object rendering...
309 RenderObjects(&painter, document.objects);
311 if (!informativeText.isEmpty())
312 painter.DrawInformativeText(informativeText);
314 // Do tool rendering, if any...
317 painter.SetPen(QPen(QColor(200, 100, 0, 255), 1.0, Qt::DashLine));
318 painter.DrawCrosshair(oldPoint);
322 // Do selection rectangle rendering, if any
323 if (Global::selectionInProgress)
325 painter.SetPen(QPen(QColor(255, 127, 0, 255)));
326 painter.SetBrush(QBrush(QColor(255, 127, 0, 100)));
327 painter.DrawRect(Global::selection);
333 // Renders objects in the passed in vector
335 void DrawingView::RenderObjects(Painter * painter, std::vector<void *> & v)
337 std::vector<void *>::iterator i;
339 for(i=v.begin(); i!=v.end(); i++)
341 Object * obj = (Object *)(*i);
342 float scaledThickness = Global::scale * obj->thickness;
344 if ((Global::tool == TTRotate) && ctrlDown && obj->selected)
346 painter->SetPen(0x00FF00, 2.0, LSSolid);
350 painter->SetPen(obj->color, Global::zoom * scaledThickness, obj->style);
351 painter->SetBrush(obj->color);
353 if (obj->selected || obj->hitObject)
354 painter->SetPen(0xFF0000, Global::zoom * scaledThickness, LSDash);
360 painter->DrawLine(obj->p[0], obj->p[1]);
362 if (obj->hitPoint[0])
363 painter->DrawHandle(obj->p[0]);
365 if (obj->hitPoint[1])
366 painter->DrawHandle(obj->p[1]);
370 painter->SetBrush(QBrush(Qt::NoBrush));
371 painter->DrawEllipse(obj->p[0], obj->radius[0], obj->radius[0]);
373 if (obj->hitPoint[0])
374 painter->DrawHandle(obj->p[0]);
378 painter->DrawArc(obj->p[0], obj->radius[0], obj->angle[0], obj->angle[1]);
382 Dimension * d = (Dimension *)obj;
384 Vector v(d->p[0], d->p[1]);
385 double angle = v.Angle();
386 Vector unit = v.Unit();
387 Vector linePt1 = d->p[0], linePt2 = d->p[1];
389 double x1, y1, length;
391 if (d->subtype == DTLinearVert)
393 if ((angle < 0) || (angle > PI))
395 x1 = (d->p[0].x > d->p[1].x ? d->p[0].x : d->p[1].x);
396 y1 = (d->p[0].y > d->p[1].y ? d->p[0].y : d->p[1].y);
397 ortho = Vector(1.0, 0);
402 x1 = (d->p[0].x > d->p[1].x ? d->p[1].x : d->p[0].x);
403 y1 = (d->p[0].y > d->p[1].y ? d->p[1].y : d->p[0].y);
404 ortho = Vector(-1.0, 0);
408 linePt1.x = linePt2.x = x1;
409 length = fabs(d->p[0].y - d->p[1].y);
411 else if (d->subtype == DTLinearHorz)
413 if ((angle < PI_OVER_2) || (angle > PI3_OVER_2))
415 x1 = (d->p[0].x > d->p[1].x ? d->p[0].x : d->p[1].x);
416 y1 = (d->p[0].y > d->p[1].y ? d->p[0].y : d->p[1].y);
417 ortho = Vector(0, 1.0);
422 x1 = (d->p[0].x > d->p[1].x ? d->p[1].x : d->p[0].x);
423 y1 = (d->p[0].y > d->p[1].y ? d->p[1].y : d->p[0].y);
424 ortho = Vector(0, -1.0);
428 linePt1.y = linePt2.y = y1;
429 length = fabs(d->p[0].x - d->p[1].x);
431 else if (d->subtype == DTLinear)
433 angle = Vector(linePt1, linePt2).Angle();
434 ortho = Vector::Normal(linePt1, linePt2);
435 length = v.Magnitude();
438 unit = Vector(linePt1, linePt2).Unit();
440 Point p1 = linePt1 + (ortho * 10.0 * scaledThickness);
441 Point p2 = linePt2 + (ortho * 10.0 * scaledThickness);
442 Point p3 = linePt1 + (ortho * 16.0 * scaledThickness);
443 Point p4 = linePt2 + (ortho * 16.0 * scaledThickness);
444 Point p5 = d->p[0] + (ortho * 4.0 * scaledThickness);
445 Point p6 = d->p[1] + (ortho * 4.0 * scaledThickness);
448 The numbers hardcoded into here, what are they?
449 I believe they are pixels.
451 // Draw extension lines (if certain type)
452 painter->DrawLine(p3, p5);
453 painter->DrawLine(p4, p6);
455 // Calculate whether or not the arrowheads are too crowded to put inside
456 // the extension lines. 9.0 is the length of the arrowhead.
457 double t = Geometry::ParameterOfLineAndPoint(linePt1, linePt2, linePt2 - (unit * 9.0 * scaledThickness));
458 //printf("Dimension::Draw(): t = %lf\n", t);
460 // On the screen, it's acting like this is actually 58%...
461 // This is correct, we want it to happen at > 50%
464 // Draw main dimension line + arrowheads
465 painter->DrawLine(p1, p2);
466 painter->DrawArrowhead(p1, p2, scaledThickness);
467 painter->DrawArrowhead(p2, p1, scaledThickness);
471 // Draw outside arrowheads
472 Point p7 = p1 - (unit * 9.0 * scaledThickness);
473 Point p8 = p2 + (unit * 9.0 * scaledThickness);
474 painter->DrawArrowhead(p1, p7, scaledThickness);
475 painter->DrawArrowhead(p2, p8, scaledThickness);
476 painter->DrawLine(p1, p1 - (unit * 14.0 * scaledThickness));
477 painter->DrawLine(p2, p2 + (unit * 14.0 * scaledThickness));
480 // Draw length of dimension line...
481 painter->SetFont(QFont("Arial", 8.0 * Global::zoom * scaledThickness));
482 Point ctr = p2 + (Vector(p2, p1) / 2.0);
485 QString dimText = QString("%1\"").arg(Vector(endpoint - position).Magnitude());
490 dimText = QString("%1\"").arg(length);
493 double feet = (double)((int)length / 12);
494 double inches = length - (feet * 12.0);
497 dimText = QString("%1'").arg(feet);
499 dimText = QString("%1' %2\"").arg(feet).arg(inches);
503 painter->DrawAngledText(ctr, angle, dimText, scaledThickness);
509 Text * t = (Text *)obj;
510 painter->DrawTextObject(t->p[0], t->s.c_str(), scaledThickness);
520 void DrawingView::AddHoveredToSelection(void)
522 std::vector<void *>::iterator i;
524 for(i=document.objects.begin(); i!=document.objects.end(); i++)
526 if (((Object *)(*i))->hovered)
527 ((Object *)(*i))->selected = true;
532 void DrawingView::GetSelection(std::vector<void *> & v)
535 std::vector<void *>::iterator i;
537 for(i=document.objects.begin(); i!=document.objects.end(); i++)
539 if (((Object *)(*i))->selected)
545 void DrawingView::GetHovered(std::vector<void *> & v)
548 std::vector<void *>::iterator i;
550 for(i=document.objects.begin(); i!=document.objects.end(); i++)
552 if (((Object *)(*i))->hovered)
554 //printf("GetHovered: adding object (%X) to hover... hp1=%s, hp2=%s, hl=%s\n", (*i), (((Line *)(*i))->hitPoint[0] ? "true" : "false"), (((Line *)(*i))->hitPoint[1] ? "true" : "false"), (((Line *)(*i))->hitObject ? "true" : "false"));
561 void DrawingView::resizeEvent(QResizeEvent * /*event*/)
563 Global::screenSize = Vector(size().width(), size().height());
564 UpdateGridBackground();
568 void DrawingView::ToolHandler(int mode, Point p)
570 if (Global::tool == TTLine)
571 LineHandler(mode, p);
572 else if (Global::tool == TTRotate)
573 RotateHandler(mode, p);
577 void DrawingView::ToolDraw(Painter * painter)
579 if (Global::tool == TTLine)
581 if (Global::toolState == TSNone)
583 painter->DrawHandle(toolPoint[0]);
585 else if ((Global::toolState == TSPoint2) && shiftDown)
587 painter->DrawHandle(toolPoint[1]);
591 painter->DrawLine(toolPoint[0], toolPoint[1]);
592 painter->DrawHandle(toolPoint[1]);
594 Vector v(toolPoint[0], toolPoint[1]);
595 double absAngle = v.Angle() * RADIANS_TO_DEGREES;
596 double absLength = v.Magnitude();
597 QString text = tr("Length: %1 in.\n") + QChar(0x2221) + tr(": %2");
598 text = text.arg(absLength).arg(absAngle);
599 painter->DrawInformativeText(text);
602 else if (Global::tool == TTRotate)
604 if ((Global::toolState == TSNone) || (Global::toolState == TSPoint1))
605 painter->DrawHandle(toolPoint[0]);
606 else if ((Global::toolState == TSPoint2) && shiftDown)
607 painter->DrawHandle(toolPoint[1]);
610 if (toolPoint[0] == toolPoint[1])
613 painter->DrawLine(toolPoint[0], toolPoint[1]);
614 // Likely we need a tool container for this... (now we do!)
618 painter->SetPen(0x00FF00, 2.0, LSSolid);
619 overrideColor = true;
622 RenderObjects(painter, toolObjects);
623 overrideColor = false;
626 double absAngle = (Vector(toolPoint[1] - toolPoint[0]).Angle()) * RADIANS_TO_DEGREES;
628 QString text = QChar(0x2221) + QObject::tr(": %1");
629 text = text.arg(absAngle);
634 painter->DrawInformativeText(text);
640 void DrawingView::LineHandler(int mode, Point p)
645 if (Global::toolState == TSNone)
652 if (Global::toolState == TSNone)
659 if (Global::toolState == TSNone)
661 Global::toolState = TSPoint2;
662 // Prevent spurious line from drawing...
663 toolPoint[1] = toolPoint[0];
665 else if ((Global::toolState == TSPoint2) && shiftDown)
667 // Key override is telling us to make a new line, not continue the
669 toolPoint[0] = toolPoint[1];
673 Line * l = new Line(toolPoint[0], toolPoint[1]);
674 document.objects.push_back(l);
675 toolPoint[0] = toolPoint[1];
681 void DrawingView::RotateHandler(int mode, Point p)
686 if (Global::toolState == TSNone)
689 SavePointsFrom(select, toolScratch);
690 Global::toolState = TSPoint1;
692 else if (Global::toolState == TSPoint1)
699 if ((Global::toolState == TSPoint1) || (Global::toolState == TSNone))
701 else if (Global::toolState == TSPoint2)
708 double angle = Vector(toolPoint[0], toolPoint[1]).Angle();
709 std::vector<void *>::iterator j = select.begin();
710 std::vector<Object>::iterator i = toolScratch.begin();
712 for(; i!=toolScratch.end(); i++, j++)
715 Point p1 = Geometry::RotatePointAroundPoint(obj.p[0], toolPoint[0], angle);
716 Point p2 = Geometry::RotatePointAroundPoint(obj.p[1], toolPoint[0], angle);
717 Object * obj2 = (Object *)(*j);
721 if (obj.type == OTArc)
723 obj2->angle[0] = obj.angle[0] + angle;
725 if (obj2->angle[0] > PI_TIMES_2)
726 obj2->angle[0] -= PI_TIMES_2;
733 if (Global::toolState == TSPoint1)
735 Global::toolState = TSPoint2;
736 // Prevent spurious line from drawing...
737 toolPoint[1] = toolPoint[0];
739 else if ((Global::toolState == TSPoint2) && shiftDown)
741 // Key override is telling us to make a new line, not continue the
743 toolPoint[0] = toolPoint[1];
747 // Either we're finished with our rotate, or we're stamping a copy.
750 // Stamp a copy of the selection at the current rotation & bail
751 std::vector<void *> temp;
752 CopyObjects(select, temp);
754 AddObjectsTo(document.objects, temp);
755 RestorePointsTo(select, toolScratch);
760 Global::toolState = TSPoint1;
761 SavePointsFrom(select, toolScratch);
766 // Reset the selection if shift held down...
768 RestorePointsTo(select, toolScratch);
772 // Reset selection when key is let up
774 RotateHandler(ToolMouseMove, toolPoint[1]);
778 RestorePointsTo(select, toolScratch);
783 void DrawingView::mousePressEvent(QMouseEvent * event)
785 if (event->button() == Qt::LeftButton)
787 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
789 // Handle tool processing, if any
792 if (Global::snapToGrid)
793 point = SnapPointToGrid(point);
795 //Also, may want to figure out if hovering over a snap point on an object,
796 //snap to grid if not.
797 // Snap to object point if valid...
798 // if (Global::snapPointIsValid)
799 // point = Global::snapPoint;
801 ToolHandler(ToolMouseDown, point);
805 // Clear the selection only if CTRL isn't being held on click
807 ClearSelected(document.objects);
810 // If any objects are being hovered on click, add them to the selection
814 AddHoveredToSelection();
815 update(); // needed??
816 GetHovered(hover); // prolly needed
818 // Needed for grab & moving objects
819 // We do it *after*... why? (doesn't seem to confer any advantage...)
820 if (Global::snapToGrid)
821 oldPoint = SnapPointToGrid(point);
826 // Didn't hit any object and not using a tool, so do a selection rectangle
827 Global::selectionInProgress = true;
828 Global::selection.setTopLeft(QPointF(point.x, point.y));
829 Global::selection.setBottomRight(QPointF(point.x, point.y));
831 else if (event->button() == Qt::MiddleButton)
834 oldPoint = Vector(event->x(), event->y());
835 // Should also change the mouse pointer as well...
836 setCursor(Qt::SizeAllCursor);
841 void DrawingView::mouseMoveEvent(QMouseEvent * event)
843 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
844 Global::selection.setBottomRight(QPointF(point.x, point.y));
845 // Only needs to be done here, as mouse down is always preceded by movement
846 Global::snapPointIsValid = false;
849 if (event->buttons() & Qt::MiddleButton)
851 point = Vector(event->x(), event->y());
852 // Since we're using Qt coords for scrolling, we have to adjust them here to
853 // conform to Cartesian coords, since the origin is using Cartesian. :-)
854 Vector delta(oldPoint, point);
855 delta /= Global::zoom;
857 Global::origin -= delta;
859 UpdateGridBackground();
865 // If we're doing a selection rect, see if any objects are engulfed by it
866 // (implies left mouse button held down)
867 if (Global::selectionInProgress)
874 // Handle object movement (left button down & over an object)
875 if ((event->buttons() & Qt::LeftButton) && numHovered && !Global::tool)
877 if (Global::snapToGrid)
878 point = SnapPointToGrid(point);
880 HandleObjectMovement(point);
886 // Do object hit testing...
887 bool needUpdate = HitTestObjects(point);
889 // Do tool handling, if any are active...
892 if (Global::snapToGrid)
893 point = SnapPointToGrid(point);
895 ToolHandler(ToolMouseMove, point);
898 // This is used to draw the tool crosshair...
901 if (needUpdate || Global::tool)
906 void DrawingView::mouseReleaseEvent(QMouseEvent * event)
908 if (event->button() == Qt::LeftButton)
910 //We need to update especially if nothing collided and the state needs to change. !!! FIX !!!
911 //could set it up to use the document's update function (assumes that all object updates
912 //are being reported correctly:
913 // if (document.NeedsUpdate())
914 // Do an update if collided with at least *one* object in the document
920 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
921 ToolHandler(ToolMouseUp, point);
925 if (Global::selectionInProgress)
926 Global::selectionInProgress = false;
928 informativeText.clear();
929 // Should we be doing this automagically? Hmm...
935 std::vector<void *>::iterator i;
937 for(i=document.objects.begin(); i!=document.objects.end(); i++)
939 if (((Object *)(*i))->selected)
940 select.push_back(*i);
942 //hmm, this is no good, too late to do any good :-P
943 // if ((*i)->hovered)
944 // hover.push_back(*i);
948 else if (event->button() == Qt::MiddleButton)
951 setCursor(Qt::ArrowCursor);
956 void DrawingView::wheelEvent(QWheelEvent * event)
958 double zoomFactor = 1.25;
959 QSize sizeWin = size();
960 Vector center(sizeWin.width() / 2.0, sizeWin.height() / 2.0);
961 center = Painter::QtToCartesianCoords(center);
963 // This is not centering for some reason. Need to figure out why. :-/
964 if (event->delta() > 0)
966 Vector newOrigin = center - ((center - Global::origin) / zoomFactor);
967 Global::origin = newOrigin;
968 Global::zoom *= zoomFactor;
972 Vector newOrigin = center + ((-center + Global::origin) * zoomFactor);
973 Global::origin = newOrigin;
974 Global::zoom /= zoomFactor;
977 // Global::gridSpacing = gridPixels / Painter::zoom;
978 // UpdateGridBackground();
979 SetGridSize(Global::gridSpacing * Global::zoom);
981 // zoomIndicator->setText(QString("Grid: %1\", BU: Inch").arg(Global::gridSpacing));
985 void DrawingView::keyPressEvent(QKeyEvent * event)
987 bool oldShift = shiftDown;
988 bool oldCtrl = ctrlDown;
990 if (event->key() == Qt::Key_Shift)
992 else if (event->key() == Qt::Key_Control)
995 if ((oldShift != shiftDown) || (oldCtrl != ctrlDown))
998 ToolHandler(ToolKeyDown, Point(0, 0));
1005 void DrawingView::keyReleaseEvent(QKeyEvent * event)
1007 bool oldShift = shiftDown;
1008 bool oldCtrl = ctrlDown;
1010 if (event->key() == Qt::Key_Shift)
1012 else if (event->key() == Qt::Key_Control)
1015 if ((oldShift != shiftDown) || (oldCtrl != ctrlDown))
1018 ToolHandler(ToolKeyUp, Point(0, 0));
1026 // This looks strange, but it's really quite simple: We want a point that's
1027 // more than half-way to the next grid point to snap there while conversely we
1028 // want a point that's less than half-way to to the next grid point then snap
1029 // to the one before it. So we add half of the grid spacing to the point, then
1030 // divide by it so that we can remove the fractional part, then multiply it
1031 // back to get back to the correct answer.
1033 Point DrawingView::SnapPointToGrid(Point point)
1035 point += Global::gridSpacing / 2.0; // *This* adds to Z!!!
1036 point /= Global::gridSpacing;
1037 point.x = floor(point.x);//need to fix this for negative numbers...
1038 point.y = floor(point.y);
1039 point.z = 0; // Make *sure* Z doesn't go anywhere!!!
1040 point *= Global::gridSpacing;
1045 void DrawingView::CheckObjectBounds(void)
1047 std::vector<void *>::iterator i;
1050 for(i=document.objects.begin(); i!=document.objects.end(); i++)
1052 Object * obj = (Object *)(*i);
1053 obj->selected = false;
1059 Line * l = (Line *)obj;
1061 if (Global::selection.contains(l->p[0].x, l->p[0].y) && Global::selection.contains(l->p[1].x, l->p[1].y))
1068 Circle * c = (Circle *)obj;
1070 if (Global::selection.contains(c->p[0].x - c->radius[0], c->p[0].y - c->radius[0]) && Global::selection.contains(c->p[0].x + c->radius[0], c->p[0].y + c->radius[0]))
1077 Arc * a = (Arc *)obj;
1079 double start = a->angle[0];
1080 double end = start + a->angle[1];
1081 QPointF p1(cos(start), sin(start));
1082 QPointF p2(cos(end), sin(end));
1083 QRectF bounds(p1, p2);
1086 // Swap X/Y coordinates if they're backwards...
1087 if (bounds.left() > bounds.right())
1089 double temp = bounds.left();
1090 bounds.setLeft(bounds.right());
1091 bounds.setRight(temp);
1094 if (bounds.bottom() > bounds.top())
1096 double temp = bounds.bottom();
1097 bounds.setBottom(bounds.top());
1098 bounds.setTop(temp);
1101 // Doesn't work as advertised! For shame!
1102 bounds = bounds.normalized();
1105 // If the end of the arc is before the beginning, add 360 degrees to it
1109 // Adjust the bounds depending on which axes are crossed
1110 if ((start < PI_OVER_2) && (end > PI_OVER_2))
1113 if ((start < PI) && (end > PI))
1114 bounds.setLeft(-1.0);
1116 if ((start < (PI + PI_OVER_2)) && (end > (PI + PI_OVER_2)))
1117 bounds.setBottom(-1.0);
1119 if ((start < (2.0 * PI)) && (end > (2.0 * PI)))
1120 bounds.setRight(1.0);
1122 if ((start < ((2.0 * PI) + PI_OVER_2)) && (end > ((2.0 * PI) + PI_OVER_2)))
1125 if ((start < (3.0 * PI)) && (end > (3.0 * PI)))
1126 bounds.setLeft(-1.0);
1128 if ((start < ((3.0 * PI) + PI_OVER_2)) && (end > ((3.0 * PI) + PI_OVER_2)))
1129 bounds.setBottom(-1.0);
1131 bounds.setTopLeft(QPointF(bounds.left() * a->radius[0], bounds.top() * a->radius[0]));
1132 bounds.setBottomRight(QPointF(bounds.right() * a->radius[0], bounds.bottom() * a->radius[0]));
1133 bounds.translate(a->p[0].x, a->p[0].y);
1135 if (Global::selection.contains(bounds))
1150 bool DrawingView::HitTestObjects(Point point)
1152 std::vector<void *>::iterator i;
1154 bool needUpdate = false;
1156 for(i=document.objects.begin(); i!=document.objects.end(); i++)
1158 Object * obj = (Object *)(*i);
1164 bool oldHP0 = obj->hitPoint[0], oldHP1 = obj->hitPoint[1], oldHO = obj->hitObject;
1165 obj->hitPoint[0] = obj->hitPoint[1] = obj->hitObject = false;
1166 Vector lineSegment = obj->p[1] - obj->p[0];
1167 Vector v1 = point - obj->p[0];
1168 Vector v2 = point - obj->p[1];
1169 double t = Geometry::ParameterOfLineAndPoint(obj->p[0], obj->p[1], point);
1173 distance = v1.Magnitude();
1175 distance = v2.Magnitude();
1177 // distance = ?Det?(ls, v1) / |ls|
1178 distance = fabs((lineSegment.x * v1.y - v1.x * lineSegment.y)
1179 / lineSegment.Magnitude());
1181 if ((v1.Magnitude() * Global::zoom) < 8.0)
1182 obj->hitPoint[0] = true;
1183 else if ((v2.Magnitude() * Global::zoom) < 8.0)
1184 obj->hitPoint[1] = true;
1185 else if ((distance * Global::zoom) < 5.0)
1186 obj->hitObject = true;
1188 obj->hovered = (obj->hitPoint[0] || obj->hitPoint[1] || obj->hitObject ? true : false);
1190 if ((oldHP0 != obj->hitPoint[0]) || (oldHP1 != obj->hitPoint[1]) || (oldHO != obj->hitObject))
1197 bool oldHP = obj->hitPoint[0], oldHO = obj->hitObject;
1198 obj->hitPoint[0] = obj->hitObject = false;
1199 double length = Vector::Magnitude(obj->p[0], point);
1201 if ((length * Global::zoom) < 8.0)
1202 obj->hitPoint[0] = true;
1203 else if ((fabs(length - obj->radius[0]) * Global::zoom) < 2.0)
1204 obj->hitObject = true;
1206 obj->hovered = (obj->hitPoint[0] || obj->hitObject ? true : false);
1208 if ((oldHP != obj->hitPoint[0]) || (oldHO != obj->hitObject))
1220 //printf("MouseMove: OBJECT HOVERED (numHovered = %i)\n", numHovered);
1228 void DrawingView::HandleObjectMovement(Point point)
1230 Point delta = point - oldPoint;
1231 //printf("HOM: old = (%f,%f), new = (%f, %f), delta = (%f, %f)\n", oldPoint.x, oldPoint.y, point.x, point.y, delta.x, delta.y);
1232 Object * obj = (Object *)hover[0];
1233 //printf("Object type = %i (size=%i), ", obj->type, hover.size());
1234 //printf("Object (%X) move: hp1=%s, hp2=%s, hl=%s\n", obj, (obj->hitPoint[0] ? "true" : "false"), (obj->hitPoint[1] ? "true" : "false"), (obj->hitObject ? "true" : "false"));
1239 if (obj->hitPoint[0])
1241 else if (obj->hitPoint[1])
1243 else if (obj->hitObject)
1251 if (obj->hitPoint[0])
1253 else if (obj->hitObject)
1255 //this doesn't work. we need to save this on mouse down for this to work correctly!
1256 // double oldRadius = obj->radius[0];
1257 obj->radius[0] = Vector::Magnitude(obj->p[0], point);
1259 QString text = QObject::tr("Radius: %1");//\nScale: %2%");
1260 informativeText = text.arg(obj->radius[0], 0, 'd', 4);//.arg(obj->radius[0] / oldRadius * 100.0, 0, 'd', 0);
1272 // This returns true if we've moved over an object...
1273 if (document.PointerMoved(point)) // <-- This
1274 // This is where the object would do automagic dragging & shit. Since we don't
1275 // do that anymore, we need a strategy to handle it.
1279 Now objects handle mouse move snapping as well. The code below mainly works only
1280 for tools; we need to fix it so that objects work as well...
1282 There's a problem with the object point snapping in that it's dependent on the
1283 order of the objects in the document. Most likely this is because it counts the
1284 selected object last and thus fucks up the algorithm. Need to fix this...
1288 // Do object snapping here. Grid snapping on mouse down is done in the
1289 // objects themselves, only because we have to hit test the raw point,
1290 // not the snapped point. There has to be a better way...!
1291 if (document.penultimateObjectHovered)
1293 // Two objects are hovered, see if we have an intersection point
1294 if ((document.lastObjectHovered->type == OTLine) && (document.penultimateObjectHovered->type == OTLine))
1297 int n = Geometry::Intersects((Line *)document.lastObjectHovered, (Line *)document.penultimateObjectHovered, &t);
1301 Global::snapPoint = document.lastObjectHovered->GetPointAtParameter(t);
1302 Global::snapPointIsValid = true;
1305 else if ((document.lastObjectHovered->type == OTCircle) && (document.penultimateObjectHovered->type == OTCircle))
1308 int n = Geometry::Intersects((Circle *)document.lastObjectHovered, (Circle *)document.penultimateObjectHovered, 0, 0, 0, 0, &p1, &p2);
1312 Global::snapPoint = p1;
1313 Global::snapPointIsValid = true;
1317 double d1 = Vector(point, p1).Magnitude();
1318 double d2 = Vector(point, p2).Magnitude();
1321 Global::snapPoint = p1;
1323 Global::snapPoint = p2;
1325 Global::snapPointIsValid = true;
1331 // Otherwise, it was a single object hovered...
1337 if (Global::snapToGrid)
1338 point = Global::SnapPointToGrid(point);
1340 // We always snap to object points, and they take precendence over
1342 if (Global::snapPointIsValid)
1343 point = Global::snapPoint;
1345 toolAction->MouseMoved(point);