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 // Do tool rendering, if any...
314 painter.SetPen(QPen(QColor(200, 100, 0, 255), 1.0, Qt::DashLine));
315 painter.DrawCrosshair(oldPoint);
319 // Do selection rectangle rendering, if any
320 if (Global::selectionInProgress)
322 painter.SetPen(QPen(QColor(255, 127, 0, 255)));
323 painter.SetBrush(QBrush(QColor(255, 127, 0, 100)));
324 painter.DrawRect(Global::selection);
327 if (!informativeText.isEmpty())
328 painter.DrawInformativeText(informativeText);
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 == TTCircle)
573 CircleHandler(mode, p);
574 else if (Global::tool == TTRotate)
575 RotateHandler(mode, p);
579 void DrawingView::ToolDraw(Painter * painter)
581 if (Global::tool == TTLine)
583 if (Global::toolState == TSNone)
585 painter->DrawHandle(toolPoint[0]);
587 else if ((Global::toolState == TSPoint2) && shiftDown)
589 painter->DrawHandle(toolPoint[1]);
593 painter->DrawLine(toolPoint[0], toolPoint[1]);
594 painter->DrawHandle(toolPoint[1]);
596 Vector v(toolPoint[0], toolPoint[1]);
597 double absAngle = v.Angle() * RADIANS_TO_DEGREES;
598 double absLength = v.Magnitude();
599 QString text = tr("Length: %1 in.\n") + QChar(0x2221) + tr(": %2");
600 informativeText = text.arg(absLength).arg(absAngle);
603 else if (Global::tool == TTCircle)
605 if (Global::toolState == TSNone)
607 painter->DrawHandle(toolPoint[0]);
609 else if ((Global::toolState == TSPoint2) && shiftDown)
611 painter->DrawHandle(toolPoint[1]);
615 double length = Vector::Magnitude(toolPoint[0], toolPoint[1]);
616 // painter->DrawLine(toolPoint[0], toolPoint[1]);
617 // painter->DrawHandle(toolPoint[1]);
618 painter->SetBrush(QBrush(Qt::NoBrush));
619 painter->DrawEllipse(toolPoint[0], length, length);
620 QString text = tr("Radius: %1 in.");//\n") + QChar(0x2221) + tr(": %2");
621 informativeText = text.arg(length);//.arg(absAngle);
624 else if (Global::tool == TTRotate)
626 if ((Global::toolState == TSNone) || (Global::toolState == TSPoint1))
627 painter->DrawHandle(toolPoint[0]);
628 else if ((Global::toolState == TSPoint2) && shiftDown)
629 painter->DrawHandle(toolPoint[1]);
632 if (toolPoint[0] == toolPoint[1])
635 painter->DrawLine(toolPoint[0], toolPoint[1]);
636 // Likely we need a tool container for this... (now we do!)
640 painter->SetPen(0x00FF00, 2.0, LSSolid);
641 overrideColor = true;
644 RenderObjects(painter, toolObjects);
645 overrideColor = false;
648 double absAngle = (Vector(toolPoint[1] - toolPoint[0]).Angle()) * RADIANS_TO_DEGREES;
650 QString text = QChar(0x2221) + QObject::tr(": %1");
651 informativeText = text.arg(absAngle);
654 informativeText += " (Copy)";
656 // painter->DrawInformativeText(text);
662 void DrawingView::LineHandler(int mode, Point p)
667 if (Global::toolState == TSNone)
674 if (Global::toolState == TSNone)
681 if (Global::toolState == TSNone)
683 Global::toolState = TSPoint2;
684 // Prevent spurious line from drawing...
685 toolPoint[1] = toolPoint[0];
687 else if ((Global::toolState == TSPoint2) && shiftDown)
689 // Key override is telling us to make a new line, not continue the
691 toolPoint[0] = toolPoint[1];
695 Line * l = new Line(toolPoint[0], toolPoint[1]);
696 document.objects.push_back(l);
697 toolPoint[0] = toolPoint[1];
703 void DrawingView::CircleHandler(int mode, Point p)
708 if (Global::toolState == TSNone)
715 if (Global::toolState == TSNone)
722 if (Global::toolState == TSNone)
724 Global::toolState = TSPoint2;
725 // Prevent spurious line from drawing...
726 toolPoint[1] = toolPoint[0];
728 else if ((Global::toolState == TSPoint2) && shiftDown)
730 // Key override is telling us to make a new line, not continue the
732 toolPoint[0] = toolPoint[1];
736 double length = Vector::Magnitude(toolPoint[0], toolPoint[1]);
737 Circle * c = new Circle(toolPoint[0], length);
738 document.objects.push_back(c);
739 toolPoint[0] = toolPoint[1];
740 Global::toolState = TSNone;
746 void DrawingView::RotateHandler(int mode, Point p)
751 if (Global::toolState == TSNone)
754 SavePointsFrom(select, toolScratch);
755 Global::toolState = TSPoint1;
757 else if (Global::toolState == TSPoint1)
764 if ((Global::toolState == TSPoint1) || (Global::toolState == TSNone))
766 else if (Global::toolState == TSPoint2)
773 double angle = Vector(toolPoint[0], toolPoint[1]).Angle();
774 std::vector<void *>::iterator j = select.begin();
775 std::vector<Object>::iterator i = toolScratch.begin();
777 for(; i!=toolScratch.end(); i++, j++)
780 Point p1 = Geometry::RotatePointAroundPoint(obj.p[0], toolPoint[0], angle);
781 Point p2 = Geometry::RotatePointAroundPoint(obj.p[1], toolPoint[0], angle);
782 Object * obj2 = (Object *)(*j);
786 if (obj.type == OTArc)
788 obj2->angle[0] = obj.angle[0] + angle;
790 if (obj2->angle[0] > PI_TIMES_2)
791 obj2->angle[0] -= PI_TIMES_2;
798 if (Global::toolState == TSPoint1)
800 Global::toolState = TSPoint2;
801 // Prevent spurious line from drawing...
802 toolPoint[1] = toolPoint[0];
804 else if ((Global::toolState == TSPoint2) && shiftDown)
806 // Key override is telling us to make a new line, not continue the
808 toolPoint[0] = toolPoint[1];
812 // Either we're finished with our rotate, or we're stamping a copy.
815 // Stamp a copy of the selection at the current rotation & bail
816 std::vector<void *> temp;
817 CopyObjects(select, temp);
819 AddObjectsTo(document.objects, temp);
820 RestorePointsTo(select, toolScratch);
825 Global::toolState = TSPoint1;
826 SavePointsFrom(select, toolScratch);
831 // Reset the selection if shift held down...
833 RestorePointsTo(select, toolScratch);
837 // Reset selection when key is let up
839 RotateHandler(ToolMouseMove, toolPoint[1]);
843 RestorePointsTo(select, toolScratch);
848 void DrawingView::mousePressEvent(QMouseEvent * event)
850 if (event->button() == Qt::LeftButton)
852 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
854 // Handle tool processing, if any
857 if (Global::snapToGrid)
858 point = SnapPointToGrid(point);
860 //Also, may want to figure out if hovering over a snap point on an object,
861 //snap to grid if not.
862 // Snap to object point if valid...
863 // if (Global::snapPointIsValid)
864 // point = Global::snapPoint;
866 ToolHandler(ToolMouseDown, point);
870 // Clear the selection only if CTRL isn't being held on click
872 ClearSelected(document.objects);
875 // If any objects are being hovered on click, add them to the selection
879 AddHoveredToSelection();
880 update(); // needed??
881 GetHovered(hover); // prolly needed
883 // Needed for grab & moving objects
884 // We do it *after*... why? (doesn't seem to confer any advantage...)
885 if (Global::snapToGrid)
886 oldPoint = SnapPointToGrid(point);
891 // Didn't hit any object and not using a tool, so do a selection rectangle
892 Global::selectionInProgress = true;
893 Global::selection.setTopLeft(QPointF(point.x, point.y));
894 Global::selection.setBottomRight(QPointF(point.x, point.y));
896 else if (event->button() == Qt::MiddleButton)
899 oldPoint = Vector(event->x(), event->y());
900 // Should also change the mouse pointer as well...
901 setCursor(Qt::SizeAllCursor);
906 void DrawingView::mouseMoveEvent(QMouseEvent * event)
908 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
909 Global::selection.setBottomRight(QPointF(point.x, point.y));
910 // Only needs to be done here, as mouse down is always preceded by movement
911 Global::snapPointIsValid = false;
914 if (event->buttons() & Qt::MiddleButton)
916 point = Vector(event->x(), event->y());
917 // Since we're using Qt coords for scrolling, we have to adjust them here to
918 // conform to Cartesian coords, since the origin is using Cartesian. :-)
919 Vector delta(oldPoint, point);
920 delta /= Global::zoom;
922 Global::origin -= delta;
924 UpdateGridBackground();
930 // If we're doing a selection rect, see if any objects are engulfed by it
931 // (implies left mouse button held down)
932 if (Global::selectionInProgress)
939 // Handle object movement (left button down & over an object)
940 if ((event->buttons() & Qt::LeftButton) && numHovered && !Global::tool)
942 if (Global::snapToGrid)
943 point = SnapPointToGrid(point);
945 HandleObjectMovement(point);
951 // Do object hit testing...
952 bool needUpdate = HitTestObjects(point);
954 // Do tool handling, if any are active...
957 if (Global::snapToGrid)
958 point = SnapPointToGrid(point);
960 ToolHandler(ToolMouseMove, point);
963 // This is used to draw the tool crosshair...
966 if (needUpdate || Global::tool)
971 void DrawingView::mouseReleaseEvent(QMouseEvent * event)
973 if (event->button() == Qt::LeftButton)
975 //We need to update especially if nothing collided and the state needs to change. !!! FIX !!!
976 //could set it up to use the document's update function (assumes that all object updates
977 //are being reported correctly:
978 // if (document.NeedsUpdate())
979 // Do an update if collided with at least *one* object in the document
985 Vector point = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
986 ToolHandler(ToolMouseUp, point);
990 if (Global::selectionInProgress)
991 Global::selectionInProgress = false;
993 informativeText.clear();
994 // Should we be doing this automagically? Hmm...
1000 std::vector<void *>::iterator i;
1002 for(i=document.objects.begin(); i!=document.objects.end(); i++)
1004 if (((Object *)(*i))->selected)
1005 select.push_back(*i);
1007 //hmm, this is no good, too late to do any good :-P
1008 // if ((*i)->hovered)
1009 // hover.push_back(*i);
1012 else if (event->button() == Qt::MiddleButton)
1015 setCursor(Qt::ArrowCursor);
1020 void DrawingView::wheelEvent(QWheelEvent * event)
1022 double zoomFactor = 1.25;
1023 QSize sizeWin = size();
1024 Vector center(sizeWin.width() / 2.0, sizeWin.height() / 2.0);
1025 center = Painter::QtToCartesianCoords(center);
1027 // This is not centering for some reason. Need to figure out why. :-/
1028 if (event->delta() > 0)
1030 Vector newOrigin = center - ((center - Global::origin) / zoomFactor);
1031 Global::origin = newOrigin;
1032 Global::zoom *= zoomFactor;
1036 Vector newOrigin = center + ((-center + Global::origin) * zoomFactor);
1037 Global::origin = newOrigin;
1038 Global::zoom /= zoomFactor;
1041 // Global::gridSpacing = gridPixels / Painter::zoom;
1042 // UpdateGridBackground();
1043 SetGridSize(Global::gridSpacing * Global::zoom);
1045 // zoomIndicator->setText(QString("Grid: %1\", BU: Inch").arg(Global::gridSpacing));
1049 void DrawingView::keyPressEvent(QKeyEvent * event)
1051 bool oldShift = shiftDown;
1052 bool oldCtrl = ctrlDown;
1054 if (event->key() == Qt::Key_Shift)
1056 else if (event->key() == Qt::Key_Control)
1059 if ((oldShift != shiftDown) || (oldCtrl != ctrlDown))
1062 ToolHandler(ToolKeyDown, Point(0, 0));
1069 void DrawingView::keyReleaseEvent(QKeyEvent * event)
1071 bool oldShift = shiftDown;
1072 bool oldCtrl = ctrlDown;
1074 if (event->key() == Qt::Key_Shift)
1076 else if (event->key() == Qt::Key_Control)
1079 if ((oldShift != shiftDown) || (oldCtrl != ctrlDown))
1082 ToolHandler(ToolKeyUp, Point(0, 0));
1090 // This looks strange, but it's really quite simple: We want a point that's
1091 // more than half-way to the next grid point to snap there while conversely we
1092 // want a point that's less than half-way to to the next grid point then snap
1093 // to the one before it. So we add half of the grid spacing to the point, then
1094 // divide by it so that we can remove the fractional part, then multiply it
1095 // back to get back to the correct answer.
1097 Point DrawingView::SnapPointToGrid(Point point)
1099 point += Global::gridSpacing / 2.0; // *This* adds to Z!!!
1100 point /= Global::gridSpacing;
1101 point.x = floor(point.x);//need to fix this for negative numbers...
1102 point.y = floor(point.y);
1103 point.z = 0; // Make *sure* Z doesn't go anywhere!!!
1104 point *= Global::gridSpacing;
1109 void DrawingView::CheckObjectBounds(void)
1111 std::vector<void *>::iterator i;
1114 for(i=document.objects.begin(); i!=document.objects.end(); i++)
1116 Object * obj = (Object *)(*i);
1117 obj->selected = false;
1123 Line * l = (Line *)obj;
1125 if (Global::selection.contains(l->p[0].x, l->p[0].y) && Global::selection.contains(l->p[1].x, l->p[1].y))
1132 Circle * c = (Circle *)obj;
1134 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]))
1141 Arc * a = (Arc *)obj;
1143 double start = a->angle[0];
1144 double end = start + a->angle[1];
1145 QPointF p1(cos(start), sin(start));
1146 QPointF p2(cos(end), sin(end));
1147 QRectF bounds(p1, p2);
1150 // Swap X/Y coordinates if they're backwards...
1151 if (bounds.left() > bounds.right())
1153 double temp = bounds.left();
1154 bounds.setLeft(bounds.right());
1155 bounds.setRight(temp);
1158 if (bounds.bottom() > bounds.top())
1160 double temp = bounds.bottom();
1161 bounds.setBottom(bounds.top());
1162 bounds.setTop(temp);
1165 // Doesn't work as advertised! For shame!
1166 bounds = bounds.normalized();
1169 // If the end of the arc is before the beginning, add 360 degrees to it
1173 // Adjust the bounds depending on which axes are crossed
1174 if ((start < PI_OVER_2) && (end > PI_OVER_2))
1177 if ((start < PI) && (end > PI))
1178 bounds.setLeft(-1.0);
1180 if ((start < (PI + PI_OVER_2)) && (end > (PI + PI_OVER_2)))
1181 bounds.setBottom(-1.0);
1183 if ((start < (2.0 * PI)) && (end > (2.0 * PI)))
1184 bounds.setRight(1.0);
1186 if ((start < ((2.0 * PI) + PI_OVER_2)) && (end > ((2.0 * PI) + PI_OVER_2)))
1189 if ((start < (3.0 * PI)) && (end > (3.0 * PI)))
1190 bounds.setLeft(-1.0);
1192 if ((start < ((3.0 * PI) + PI_OVER_2)) && (end > ((3.0 * PI) + PI_OVER_2)))
1193 bounds.setBottom(-1.0);
1195 bounds.setTopLeft(QPointF(bounds.left() * a->radius[0], bounds.top() * a->radius[0]));
1196 bounds.setBottomRight(QPointF(bounds.right() * a->radius[0], bounds.bottom() * a->radius[0]));
1197 bounds.translate(a->p[0].x, a->p[0].y);
1199 if (Global::selection.contains(bounds))
1214 bool DrawingView::HitTestObjects(Point point)
1216 std::vector<void *>::iterator i;
1218 bool needUpdate = false;
1220 for(i=document.objects.begin(); i!=document.objects.end(); i++)
1222 Object * obj = (Object *)(*i);
1228 bool oldHP0 = obj->hitPoint[0], oldHP1 = obj->hitPoint[1], oldHO = obj->hitObject;
1229 obj->hitPoint[0] = obj->hitPoint[1] = obj->hitObject = false;
1230 Vector lineSegment = obj->p[1] - obj->p[0];
1231 Vector v1 = point - obj->p[0];
1232 Vector v2 = point - obj->p[1];
1233 double t = Geometry::ParameterOfLineAndPoint(obj->p[0], obj->p[1], point);
1237 distance = v1.Magnitude();
1239 distance = v2.Magnitude();
1241 // distance = ?Det?(ls, v1) / |ls|
1242 distance = fabs((lineSegment.x * v1.y - v1.x * lineSegment.y)
1243 / lineSegment.Magnitude());
1245 if ((v1.Magnitude() * Global::zoom) < 8.0)
1246 obj->hitPoint[0] = true;
1247 else if ((v2.Magnitude() * Global::zoom) < 8.0)
1248 obj->hitPoint[1] = true;
1249 else if ((distance * Global::zoom) < 5.0)
1250 obj->hitObject = true;
1252 obj->hovered = (obj->hitPoint[0] || obj->hitPoint[1] || obj->hitObject ? true : false);
1254 if ((oldHP0 != obj->hitPoint[0]) || (oldHP1 != obj->hitPoint[1]) || (oldHO != obj->hitObject))
1261 bool oldHP = obj->hitPoint[0], oldHO = obj->hitObject;
1262 obj->hitPoint[0] = obj->hitObject = false;
1263 double length = Vector::Magnitude(obj->p[0], point);
1265 if ((length * Global::zoom) < 8.0)
1266 obj->hitPoint[0] = true;
1267 else if ((fabs(length - obj->radius[0]) * Global::zoom) < 2.0)
1268 obj->hitObject = true;
1270 obj->hovered = (obj->hitPoint[0] || obj->hitObject ? true : false);
1272 if ((oldHP != obj->hitPoint[0]) || (oldHO != obj->hitObject))
1284 //printf("MouseMove: OBJECT HOVERED (numHovered = %i)\n", numHovered);
1292 void DrawingView::HandleObjectMovement(Point point)
1294 Point delta = point - oldPoint;
1295 //printf("HOM: old = (%f,%f), new = (%f, %f), delta = (%f, %f)\n", oldPoint.x, oldPoint.y, point.x, point.y, delta.x, delta.y);
1296 Object * obj = (Object *)hover[0];
1297 //printf("Object type = %i (size=%i), ", obj->type, hover.size());
1298 //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"));
1303 if (obj->hitPoint[0])
1305 else if (obj->hitPoint[1])
1307 else if (obj->hitObject)
1315 if (obj->hitPoint[0])
1317 else if (obj->hitObject)
1319 //this doesn't work. we need to save this on mouse down for this to work correctly!
1320 // double oldRadius = obj->radius[0];
1321 obj->radius[0] = Vector::Magnitude(obj->p[0], point);
1323 QString text = QObject::tr("Radius: %1");//\nScale: %2%");
1324 informativeText = text.arg(obj->radius[0], 0, 'd', 4);//.arg(obj->radius[0] / oldRadius * 100.0, 0, 'd', 0);
1336 // This returns true if we've moved over an object...
1337 if (document.PointerMoved(point)) // <-- This
1338 // This is where the object would do automagic dragging & shit. Since we don't
1339 // do that anymore, we need a strategy to handle it.
1343 Now objects handle mouse move snapping as well. The code below mainly works only
1344 for tools; we need to fix it so that objects work as well...
1346 There's a problem with the object point snapping in that it's dependent on the
1347 order of the objects in the document. Most likely this is because it counts the
1348 selected object last and thus fucks up the algorithm. Need to fix this...
1352 // Do object snapping here. Grid snapping on mouse down is done in the
1353 // objects themselves, only because we have to hit test the raw point,
1354 // not the snapped point. There has to be a better way...!
1355 if (document.penultimateObjectHovered)
1357 // Two objects are hovered, see if we have an intersection point
1358 if ((document.lastObjectHovered->type == OTLine) && (document.penultimateObjectHovered->type == OTLine))
1361 int n = Geometry::Intersects((Line *)document.lastObjectHovered, (Line *)document.penultimateObjectHovered, &t);
1365 Global::snapPoint = document.lastObjectHovered->GetPointAtParameter(t);
1366 Global::snapPointIsValid = true;
1369 else if ((document.lastObjectHovered->type == OTCircle) && (document.penultimateObjectHovered->type == OTCircle))
1372 int n = Geometry::Intersects((Circle *)document.lastObjectHovered, (Circle *)document.penultimateObjectHovered, 0, 0, 0, 0, &p1, &p2);
1376 Global::snapPoint = p1;
1377 Global::snapPointIsValid = true;
1381 double d1 = Vector(point, p1).Magnitude();
1382 double d2 = Vector(point, p2).Magnitude();
1385 Global::snapPoint = p1;
1387 Global::snapPoint = p2;
1389 Global::snapPointIsValid = true;
1395 // Otherwise, it was a single object hovered...
1401 if (Global::snapToGrid)
1402 point = Global::SnapPointToGrid(point);
1404 // We always snap to object points, and they take precendence over
1406 if (Global::snapPointIsValid)
1407 point = Global::snapPoint;
1409 toolAction->MouseMoved(point);