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

   1 // drawlineaction.cpp: Action class for drawing lines
   2 //
   3 // Part of the Architektonas Project
   4 // (C) 2011 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  10/04/2011  Created this file
  12 // JLH  11/07/2011  Made it so this class actually does something ;-)
  13 //
  14
  15 #include "drawlineaction.h"
  16 #include "line.h"
  17 #include "mathconstants.h"
  18 #include "painter.h"
  19
  20
  21 enum { FIRST_POINT, NEXT_POINT };
  22
  23
  24 DrawLineAction::DrawLineAction(): state(FIRST_POINT), line(NULL),
  25         shiftWasPressedOnNextPoint(false)
  26 {
  27 }
  28
  29
  30 DrawLineAction::~DrawLineAction()
  31 {
  32 }
  33
  34
  35 /*virtual*/ void DrawLineAction::Draw(Painter * painter)
  36 {
  37         painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
  38
  39         // I think stuff like crosshairs should be done in the DrawingView, tho
  40         // (and it's done there now...)
  41         if (state == FIRST_POINT)
  42         {
  43                 painter->DrawHandle(p1);
  44         }
  45         else
  46         {
  47                 painter->DrawLine(p1, p2);
  48                 painter->DrawHandle(p2);
  49
  50                 Vector v(p1, p2);
  51                 double absAngle = v.Angle() * RADIANS_TO_DEGREES;
  52                 double absLength = v.Magnitude();
  53                 QString text = tr("Length: %1 in.\n") + QChar(0x2221) + tr(": %2");
  54                 text = text.arg(absLength).arg(absAngle);
  55                 painter->DrawInformativeText(text);
  56         }
  57 }
  58
  59
  60 /*virtual*/ void DrawLineAction::MouseDown(Vector point)
  61 {
  62         // Clear our override...
  63         shiftWasPressedOnNextPoint = false;
  64
  65         if (state == FIRST_POINT)
  66                 p1 = point;
  67         else
  68                 p2 = point;
  69 }
  70
  71
  72 /*virtual*/ void DrawLineAction::MouseMoved(Vector point)
  73 {
  74         if (state == FIRST_POINT)
  75                 p1 = point;
  76         else
  77                 p2 = point;
  78 }
  79
  80
  81 /*virtual*/ void DrawLineAction::MouseReleased(void)
  82 {
  83         if (state == FIRST_POINT)
  84         {
  85                 p2 = p1;
  86                 state = NEXT_POINT;
  87                 line = NULL;
  88         }
  89         else if (state == NEXT_POINT)
  90         {
  91                 Line * oldLine = line;
  92                 // We create the new object here, and then pass it off to the
  93                 // DrawingView which stuffs it into the document.
  94                 line = new Line(p1, p2);
  95
  96                 // Connect Lines by default
  97                 if (oldLine)
  98                 {
  99                         oldLine->Connect(line, 0);
 100                         line->Connect(oldLine, 1.0);
 101                 }
 102
 103                 // We don't need no stinkin' sentinels, when we have signals & slots!
 104                 emit ObjectReady(line);
 105
 106                 p1 = p2;
 107                 state = NEXT_POINT;
 108         }
 109 }
 110
 111
 112 /*virtual*/ void DrawLineAction::KeyDown(int key)
 113 {
 114         if ((key == Qt::Key_Shift) && (state == NEXT_POINT))
 115         {
 116                 shiftWasPressedOnNextPoint = true;
 117                 p1Save = p1;
 118                 p1 = p2;
 119                 state = FIRST_POINT;
 120                 emit NeedRefresh();
 121         }
 122 }
 123
 124
 125 /*virtual*/ void DrawLineAction::KeyReleased(int key)
 126 {
 127         if ((key == Qt::Key_Shift) && shiftWasPressedOnNextPoint)
 128         {
 129                 shiftWasPressedOnNextPoint = false;
 130                 p2 = p1;
 131                 p1 = p1Save;
 132                 state = NEXT_POINT;
 133                 emit(NeedRefresh());
 134         }
 135 }
 136