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 "painter.h"
  18 //#include "vector.h"
  19
  20
  21 //#define FIRST_POINT 0
  22 //#define NEXT_POINT 1
  23 enum { FIRST_POINT, NEXT_POINT };
  24
  25
  26 DrawLineAction::DrawLineAction(): state(FIRST_POINT), line(NULL),
  27         shiftWasPressedOnNextPoint(false)
  28 {
  29 }
  30
  31
  32 DrawLineAction::~DrawLineAction()
  33 {
  34 }
  35
  36
  37 /*virtual*/ void DrawLineAction::Draw(Painter * painter)
  38 {
  39         painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
  40
  41         // I think stuff like crosshairs should be done in the DrawingView, tho
  42         // (and it's done there now...)
  43         if (state == FIRST_POINT)
  44         {
  45                 painter->DrawHandle(p1);
  46         }
  47         else
  48         {
  49                 painter->DrawLine(p1, p2);
  50                 painter->DrawHandle(p2);
  51
  52                 QString text = tr("Length: %1 in.");
  53                 text = text.arg(Vector::Magnitude(p1, p2));
  54                 painter->DrawInformativeText(text);
  55         }
  56 }
  57
  58
  59 /*virtual*/ void DrawLineAction::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 DrawLineAction::MouseMoved(Vector point)
  72 {
  73         if (state == FIRST_POINT)
  74                 p1 = point;
  75         else
  76                 p2 = point;
  77 }
  78
  79
  80 /*virtual*/ void DrawLineAction::MouseReleased(void)
  81 {
  82         if (state == FIRST_POINT)
  83         {
  84                 p2 = p1;
  85                 state = NEXT_POINT;
  86         }
  87         else if (state == NEXT_POINT)
  88         {
  89                 // We create the new object here, and then pass it off to the
  90                 // DrawingView which stuffs it into the document.
  91                 line = new Line(p1, p2);
  92                 // We don't need no stinkin' sentinels, when we have signals & slots!
  93                 emit ObjectReady(line);
  94
  95                 p1 = p2;
  96                 state = NEXT_POINT;
  97         }
  98 }
  99
 100
 101 /*virtual*/ bool DrawLineAction::KeyDown(int key)
 102 {
 103         if ((key == Qt::Key_Shift) && (state == NEXT_POINT))
 104         {
 105                 shiftWasPressedOnNextPoint = true;
 106                 p1Save = p1;
 107                 p1 = p2;
 108                 state = FIRST_POINT;
 109                 return true;
 110         }
 111
 112         return false;
 113 }
 114
 115
 116 /*virtual*/ bool DrawLineAction::KeyReleased(int key)
 117 {
 118         if ((key == Qt::Key_Shift) && shiftWasPressedOnNextPoint)
 119         {
 120                 shiftWasPressedOnNextPoint = false;
 121                 p2 = p1;
 122                 p1 = p1Save;
 123                 state = NEXT_POINT;
 124                 return true;
 125         }
 126
 127         return false;
 128 }
 129