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 #define FIRST_POINT 0
  21 #define NEXT_POINT 1
  22
  23
  24 DrawCircleAction::DrawCircleAction(): state(0), circle(NULL)
  25 {
  26 }
  27
  28 DrawCircleAction::~DrawCircleAction()
  29 {
  30 }
  31
  32
  33 /*virtual*/ void DrawCircleAction::Draw(Painter * painter)
  34 {
  35         painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
  36
  37         // I think stuff like crosshairs should be done in the DrawingView, tho
  38         if (state == FIRST_POINT)
  39         {
  40                 painter->DrawHandle(p1);
  41         }
  42         else
  43         {
  44                 painter->DrawHandle(p1);
  45                 double radius = Vector::Magnitude(p1, p2);
  46                 painter->DrawEllipse(p1, radius, radius);
  47         }
  48 }
  49
  50 /*virtual*/ void DrawCircleAction::MouseDown(Vector point)
  51 {
  52         if (state == FIRST_POINT)
  53                 p1 = point;
  54         else
  55                 p2 = point;
  56 }
  57
  58 /*virtual*/ void DrawCircleAction::MouseMoved(Vector point)
  59 {
  60         if (state == FIRST_POINT)
  61                 p1 = point;
  62         else
  63                 p2 = point;
  64 }
  65
  66 /*virtual*/ void DrawCircleAction::MouseReleased(void)
  67 {
  68         if (state == FIRST_POINT)
  69         {
  70                 p2 = p1;
  71                 state = NEXT_POINT;
  72         }
  73         else if (state == NEXT_POINT)
  74         {
  75                 // We create the new object here, and then pass it off to the
  76                 // DrawingView which stuffs it into the document.
  77                 circle = new Circle(p1, Vector::Magnitude(p1, p2));
  78                 // We don't need no stinkin' sentinels, when we have signals & slots!
  79                 emit ObjectReady(circle);
  80
  81                 state = FIRST_POINT;
  82                 p1 = p2;
  83         }
  84 }