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

   1 // drawcircleaction.cpp: Action class for drawing circles
   2 //
   3 // Part of the Architektonas Project
   4 // (C) 2012 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  02/01/2012  Created this file
  12 //
  13
  14 #include "drawcircleaction.h"
  15 #include "circle.h"
  16 #include "painter.h"
  17 #include "vector.h"
  18
  19
  20 enum { FIRST_POINT, NEXT_POINT };
  21
  22
  23 DrawCircleAction::DrawCircleAction(): state(0), circle(NULL)
  24 {
  25 }
  26
  27 DrawCircleAction::~DrawCircleAction()
  28 {
  29 }
  30
  31
  32 /*virtual*/ void DrawCircleAction::Draw(Painter * painter)
  33 {
  34         painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
  35
  36         // I think stuff like crosshairs should be done in the DrawingView, tho
  37         if (state == FIRST_POINT)
  38         {
  39                 painter->DrawHandle(p1);
  40         }
  41         else
  42         {
  43                 painter->DrawHandle(p1);
  44                 double radius = Vector::Magnitude(p1, p2);
  45                 painter->DrawEllipse(p1, radius, radius);
  46         }
  47 }
  48
  49 /*virtual*/ void DrawCircleAction::MouseDown(Vector point)
  50 {
  51         if (state == FIRST_POINT)
  52                 p1 = point;
  53         else
  54                 p2 = point;
  55 }
  56
  57 /*virtual*/ void DrawCircleAction::MouseMoved(Vector point)
  58 {
  59         if (state == FIRST_POINT)
  60                 p1 = point;
  61         else
  62                 p2 = point;
  63 }
  64
  65 /*virtual*/ void DrawCircleAction::MouseReleased(void)
  66 {
  67         if (state == FIRST_POINT)
  68         {
  69                 p2 = p1;
  70                 state = NEXT_POINT;
  71         }
  72         else if (state == NEXT_POINT)
  73         {
  74                 // We create the new object here, and then pass it off to the
  75                 // DrawingView which stuffs it into the document.
  76                 circle = new Circle(p1, Vector::Magnitude(p1, p2));
  77                 // We don't need no stinkin' sentinels, when we have signals & slots!
  78                 emit ObjectReady(circle);
  79
  80                 state = FIRST_POINT;
  81                 p1 = p2;
  82         }
  83 }
  84
  85
  86 /*virtual*/ void DrawCircleAction::KeyDown(int /*key*/)
  87 {
  88 }
  89
  90
  91 /*virtual*/ void DrawCircleAction::KeyReleased(int /*key*/)
  92 {
  93 }
  94