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

   1 // TrimAction.cpp: Action class for mirroring selected objects
   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  08/27/2011  Created this file
  12 //
  13
  14 #include "trimaction.h"
  15 #include "applicationwindow.h"
  16 #include "container.h"
  17 #include "drawingview.h"
  18 #include "line.h"
  19 #include "mathconstants.h"
  20 #include "painter.h"
  21
  22
  23 enum { FIRST_POINT, NEXT_POINT };
  24
  25
  26 TrimAction::TrimAction(): state(FIRST_POINT), line(NULL),
  27         shiftWasPressedOnNextPoint(false), ctrlWasPressed(false),
  28         mirror(new Container(Vector()))
  29 {
  30         ApplicationWindow::drawing->document.CopySelectedContentsTo(mirror);
  31         mirror->Save();
  32 }
  33
  34
  35 TrimAction::~TrimAction()
  36 {
  37 }
  38
  39
  40 /*virtual*/ void TrimAction::Draw(Painter * painter)
  41 {
  42         painter->SetPen(QPen(Qt::red, 2.0, Qt::DotLine));
  43
  44         if (state == FIRST_POINT)
  45         {
  46                 painter->DrawHandle(p1);
  47         }
  48         else
  49         {
  50                 Vector reflectedP2 = -(p2 - p1);
  51                 Point newP2 = p1 + reflectedP2;
  52                 painter->DrawLine(newP2, p2);
  53                 painter->DrawHandle(p1);
  54
  55                 double absAngle = (Vector(p2 - p1).Angle()) * RADIANS_TO_DEGREES;
  56
  57                 // Keep the angle between 0 and 180 degrees
  58                 if (absAngle > 180.0)
  59                         absAngle -= 180.0;
  60
  61                 QString text = QChar(0x2221) + QObject::tr(": %1");
  62                 text = text.arg(absAngle);
  63
  64                 if (ctrlWasPressed)
  65                         text += " (Copy)";
  66
  67                 painter->DrawInformativeText(text);
  68
  69                 // Draw the mirror only if there's been a line to mirror around
  70                 if (p1 != p2)
  71                         mirror->Draw(painter);
  72         }
  73 }
  74
  75
  76 /*virtual*/ void TrimAction::MouseDown(Vector point)
  77 {
  78         // Clear our override...
  79         shiftWasPressedOnNextPoint = false;
  80
  81         if (state == FIRST_POINT)
  82                 p1 = point;
  83         else
  84                 p2 = point;
  85 }
  86
  87
  88 /*virtual*/ void TrimAction::MouseMoved(Vector point)
  89 {
  90         if (state == FIRST_POINT)
  91                 p1 = point;
  92         else
  93         {
  94                 p2 = point;
  95                 mirror->Restore();
  96                 mirror->Mirror(p1, p2);
  97         }
  98 }
  99
 100
 101 /*virtual*/ void TrimAction::MouseReleased(void)
 102 {
 103         if (state == FIRST_POINT)
 104         {
 105                 p2 = p1;
 106                 state = NEXT_POINT;
 107         }
 108         else if (state == NEXT_POINT)
 109         {
 110                 if (!ctrlWasPressed)
 111                 {
 112                         state = FIRST_POINT;
 113                         ApplicationWindow::drawing->document.MirrorSelected(p1, p2);
 114
 115                         mirror->Clear();
 116                         ApplicationWindow::drawing->document.CopySelectedContentsTo(mirror);
 117                         mirror->Save();
 118                 }
 119                 else
 120                 {
 121                         mirror->CopyContentsTo(&(ApplicationWindow::drawing->document));
 122                 }
 123         }
 124 }
 125
 126
 127 /*virtual*/ void TrimAction::KeyDown(int key)
 128 {
 129         if ((key == Qt::Key_Shift) && (state == NEXT_POINT))
 130         {
 131                 shiftWasPressedOnNextPoint = true;
 132                 p1Save = p1;
 133                 p1 = p2;
 134                 state = FIRST_POINT;
 135                 emit NeedRefresh();
 136         }
 137         else if (key == Qt::Key_Control)
 138         {
 139                 ctrlWasPressed = true;
 140                 emit NeedRefresh();
 141         }
 142 }
 143
 144
 145 /*virtual*/ void TrimAction::KeyReleased(int key)
 146 {
 147         if ((key == Qt::Key_Shift) && shiftWasPressedOnNextPoint)
 148         {
 149                 shiftWasPressedOnNextPoint = false;
 150                 p2 = p1;
 151                 p1 = p1Save;
 152                 state = NEXT_POINT;
 153                 emit NeedRefresh();
 154         }
 155         else if (key == Qt::Key_Control)
 156         {
 157                 ctrlWasPressed = false;
 158                 emit NeedRefresh();
 159         }
 160 }
 161