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
  19
  20 enum { FIRST_POINT, NEXT_POINT };
  21
  22
  23 DrawLineAction::DrawLineAction(): state(FIRST_POINT), line(NULL),
  24         shiftWasPressedOnNextPoint(false)
  25 {
  26 }
  27
  28
  29 DrawLineAction::~DrawLineAction()
  30 {
  31 }
  32
  33
  34 /*virtual*/ void DrawLineAction::Draw(Painter * painter)
  35 {
  36         painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
  37
  38         // I think stuff like crosshairs should be done in the DrawingView, tho
  39         // (and it's done there now...)
  40         if (state == FIRST_POINT)
  41         {
  42                 painter->DrawHandle(p1);
  43         }
  44         else
  45         {
  46                 painter->DrawLine(p1, p2);
  47                 painter->DrawHandle(p2);
  48
  49                 QString text = tr("Length: %1 in.");
  50                 text = text.arg(Vector::Magnitude(p1, p2));
  51                 painter->DrawInformativeText(text);
  52         }
  53 }
  54
  55
  56 /*virtual*/ void DrawLineAction::MouseDown(Vector point)
  57 {
  58         // Clear our override...
  59         shiftWasPressedOnNextPoint = false;
  60
  61         if (state == FIRST_POINT)
  62                 p1 = point;
  63         else
  64                 p2 = point;
  65 }
  66
  67
  68 /*virtual*/ void DrawLineAction::MouseMoved(Vector point)
  69 {
  70         if (state == FIRST_POINT)
  71                 p1 = point;
  72         else
  73                 p2 = point;
  74 }
  75
  76
  77 /*virtual*/ void DrawLineAction::MouseReleased(void)
  78 {
  79         if (state == FIRST_POINT)
  80         {
  81                 p2 = p1;
  82                 state = NEXT_POINT;
  83         }
  84         else if (state == NEXT_POINT)
  85         {
  86                 // We create the new object here, and then pass it off to the
  87                 // DrawingView which stuffs it into the document.
  88                 line = new Line(p1, p2);
  89                 // We don't need no stinkin' sentinels, when we have signals & slots!
  90                 emit ObjectReady(line);
  91
  92                 p1 = p2;
  93                 state = NEXT_POINT;
  94         }
  95 }
  96
  97
  98 /*virtual*/ void DrawLineAction::KeyDown(int key)
  99 {
 100         if ((key == Qt::Key_Shift) && (state == NEXT_POINT))
 101         {
 102                 shiftWasPressedOnNextPoint = true;
 103                 p1Save = p1;
 104                 p1 = p2;
 105                 state = FIRST_POINT;
 106                 emit(NeedRefresh());
 107         }
 108 }
 109
 110
 111 /*virtual*/ void DrawLineAction::KeyReleased(int key)
 112 {
 113         if ((key == Qt::Key_Shift) && shiftWasPressedOnNextPoint)
 114         {
 115                 shiftWasPressedOnNextPoint = false;
 116                 p2 = p1;
 117                 p1 = p1Save;
 118                 state = NEXT_POINT;
 119                 emit(NeedRefresh());
 120         }
 121 }
 122