Shamusworld >> Repos - architektonas/blob - src/drawsplineaction.cpp

   1 // drawsplineaction.cpp: Action class for drawing NURBS
   2 //
   3 // Part of the Architektonas Project
   4 // (C) 2014 Underground Software
   5 // See the README and GPLv3 files for licensing and warranty information
   6 //
   7 // JLH = James Hammons <jlhamm@acm.org>
   8 //
   9 // WHO  WHEN        WHAT
  10 // ---  ----------  ------------------------------------------------------------
  11 // JLH  03/20/2014  Created this file
  12 //
  13
  14 #include "drawsplineaction.h"
  15 #include "spline.h"
  16 #include "mathconstants.h"
  17 #include "painter.h"
  18
  19
  20 enum { FIRST_POINT, NEXT_POINT };
  21
  22
  23 DrawSplineAction::DrawSplineAction(): state(FIRST_POINT), spline(NULL),
  24         shiftWasPressedOnNextPoint(false)
  25 {
  26 }
  27
  28
  29 DrawSplineAction::~DrawSplineAction()
  30 {
  31 }
  32
  33
  34 /*virtual*/ void DrawSplineAction::Draw(Painter * painter)
  35 {
  36         painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
  37
  38         // I think stuff like crosshairs should be done in the DrawingView, tho
  39         // (and it's done there now...)
  40         if (state == FIRST_POINT)
  41         {
  42                 painter->DrawHandle(p1);
  43         }
  44         else
  45         {
  46                 painter->DrawLine(p1, p2);
  47                 painter->DrawHandle(p2);
  48
  49                 Vector v(p1, p2);
  50                 double absAngle = v.Angle() * RADIANS_TO_DEGREES;
  51                 double absLength = v.Magnitude();
  52                 QString text = tr("Length: %1 in.\n") + QChar(0x2221) + tr(": %2");
  53                 text = text.arg(absLength).arg(absAngle);
  54                 painter->DrawInformativeText(text);
  55         }
  56 }
  57
  58
  59 /*virtual*/ void DrawSplineAction::MouseDown(Vector point)
  60 {
  61         // Clear our override...
  62         shiftWasPressedOnNextPoint = false;
  63
  64         if (state == FIRST_POINT)
  65                 p1 = point;
  66         else
  67                 p2 = point;
  68 }
  69
  70
  71 /*virtual*/ void DrawSplineAction::MouseMoved(Vector point)
  72 {
  73         if (state == FIRST_POINT)
  74                 p1 = point;
  75         else
  76                 p2 = point;
  77 }
  78
  79
  80 /*virtual*/ void DrawSplineAction::MouseReleased(void)
  81 {
  82         if (state == FIRST_POINT)
  83         {
  84                 p2 = p1;
  85                 state = NEXT_POINT;
  86                 spline = NULL;
  87         }
  88         else if (state == NEXT_POINT)
  89         {
  90                 Spline * oldSpline = spline;
  91                 // We create the new object here, and then pass it off to the
  92                 // DrawingView which stuffs it into the document.
  93                 spline = new Spline(p1, p2.Angle());
  94
  95                 // Connect Lines by default
  96                 if (oldSpline)
  97                 {
  98                         oldSpline->Connect(spline, 0);
  99                         spline->Connect(oldSpline, 1.0);
 100                 }
 101
 102                 // We don't need no stinkin' sentinels, when we have signals & slots!
 103                 emit ObjectReady(spline);
 104
 105                 p1 = p2;
 106                 state = NEXT_POINT;
 107         }
 108 }
 109
 110
 111 /*virtual*/ void DrawSplineAction::KeyDown(int key)
 112 {
 113         if ((key == Qt::Key_Shift) && (state == NEXT_POINT))
 114         {
 115                 shiftWasPressedOnNextPoint = true;
 116                 p1Save = p1;
 117                 p1 = p2;
 118                 state = FIRST_POINT;
 119                 emit NeedRefresh();
 120         }
 121 }
 122
 123
 124 /*virtual*/ void DrawSplineAction::KeyReleased(int key)
 125 {
 126         if ((key == Qt::Key_Shift) && shiftWasPressedOnNextPoint)
 127         {
 128                 shiftWasPressedOnNextPoint = false;
 129                 p2 = p1;
 130                 p1 = p1Save;
 131                 state = NEXT_POINT;
 132                 emit(NeedRefresh());
 133         }
 134 }
 135