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         // Need to fix pen colors, etc...
  36         // I think stuff like crosshairs should be done in the DrawingView, tho
  37         if (state == FIRST_POINT)
  38         {
  39                 painter->DrawPoint(p1.x, p1.y);
  40         }
  41         else
  42         {
  43                 double radius = Vector::Magnitude(p1, p2);
  44                 painter->DrawEllipse(p1, radius, radius);
  45         }
  46 }
  47
  48 /*virtual*/ void DrawCircleAction::MouseDown(Vector point)
  49 {
  50         if (state == FIRST_POINT)
  51                 p1 = point;
  52         else
  53                 p2 = point;
  54 }
  55
  56 /*virtual*/ void DrawCircleAction::MouseMoved(Vector point)
  57 {
  58         if (state == FIRST_POINT)
  59                 p1 = point;
  60         else
  61                 p2 = point;
  62 }
  63
  64 /*virtual*/ void DrawCircleAction::MouseReleased(void)
  65 {
  66         if (state == FIRST_POINT)
  67         {
  68                 p2 = p1;
  69                 state = NEXT_POINT;
  70         }
  71         else if (state == NEXT_POINT)
  72         {
  73                 // We create the new object here, and then pass it off to the
  74                 // DrawingView which stuffs it into the document.
  75                 circle = new Circle(p1, Vector::Magnitude(p1, p2));
  76                 // We don't need no stinkin' sentinels, when we have signals & slots!
  77                 emit ObjectReady(circle);
  78
  79                 state = FIRST_POINT;
  80                 p1 = p2;
  81         }
  82 }