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#include "stdafx.h"
#include "DrawArrow.h"
/****************************************************************************
* DrawArrow
* Inputs:
* CDC & dc: DC
*
* CRect r: Rectangle to draw in
* Result: void
*
* Effect:
* Draws an arrow
****************************************************************************/
void DrawArrow::Draw(CDC & dc, CRect r, Direction direction)
{
CArray <CPoint, CPoint&> points;
#define ARROW_BODY_RATIO 5
switch(direction)
{ /* direction */
case ARROW_N:
{ /* up */
/****************************************************************
[0]
+-----.-----+
| / \ |
| / \ |
| / \ |
| / \ |
[6]|/__[5|2]__\| [1]
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
+---.---.---+
[4] [3]
****************************************************************/
int dx = r.Width() / ARROW_BODY_RATIO;
points.Add(CPoint(r.left + r.Width() / 2, r.top)); // [0]
points.Add(CPoint(r.right, r.top + r.Width() / 2)); // [1]
points.Add(CPoint(points[0].x + dx, points[1].y)); // [2]
points.Add(CPoint(points[2].x, r.bottom)); // [3]
points.Add(CPoint(points[0].x - dx, r.bottom)); // [4]
points.Add(CPoint(points[4].x, points[1].y)); // [5]
points.Add(CPoint(r.left, points[1].y)); // [6]
dc.BeginPath();
dc.Polyline(points.GetData(), points.GetSize());
dc.CloseFigure();
dc.EndPath();
dc.StrokeAndFillPath();
} /* up */
break;
case ARROW_S:
{ /* down */
/****************************************************************
[4] [3]
+---.---.---+
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
[6]|___| |___| [1]
|\ [5] [2] /|
| \ / |
| \ / |
| \ / |
| \ / |
+-----.-----+
[0]
****************************************************************/
int dx = r.Width() / ARROW_BODY_RATIO;
points.Add(CPoint(r.left + r.Width() / 2, r.bottom)); // [0]
points.Add(CPoint(r.right, r.bottom - r.Width() / 2));// [1]
points.Add(CPoint(points[0].x + dx, points[1].y)); // [2]
points.Add(CPoint(points[2].x, r.top)); // [3]
points.Add(CPoint(points[0].x - dx, r.top)); // [4]
points.Add(CPoint(points[4].x, points[1].y)); // [5]
points.Add(CPoint(r.left, points[1].y)); // [6]
dc.BeginPath();
dc.Polyline(points.GetData(), points.GetSize());
dc.CloseFigure();
dc.EndPath();
dc.StrokeAndFillPath();
} /* down */
break;
case ARROW_NONE:
// Do not draw anything
break;
case ARROW_W:
{ /* left */
/****************************************************************
[1]
+----.---------------------------------+
| /| |
| / |_________________________________. [3]
| /[2] |
[0]. |
| \[5]_________________________________. [4]
| \ | |
| \| |
+----.---------------------------------+
[6]
****************************************************************/
int dy = r.Height() / ARROW_BODY_RATIO;
points.Add(CPoint(r.left, r.top + r.Height() / 2)); // [0]
points.Add(CPoint(r.left + r.Height() / 2, r.top)); // [1]
points.Add(CPoint(points[1].x, points[0].y - dy)); // [2]
points.Add(CPoint(r.right, points[2].y)); // [3]
points.Add(CPoint(r.right, points[0].y + dy)); // [4]
points.Add(CPoint(points[1].x, points[4].y)); // [5]
points.Add(CPoint(points[1].x, r.bottom)); // [6]
dc.BeginPath();
dc.Polyline(points.GetData(), points.GetSize());
dc.CloseFigure();
dc.EndPath();
dc.StrokeAndFillPath();
} /* left */
break;
case ARROW_E:
{ /* right */
/****************************************************************
[1]
+---------------------------------.----+
| |\ |
| | \ |
[3]._________________________________. \ |
| [2] \. [0]
| [5] /|
[4]._________________________________. / |
| | / |
| |/ |
+---------------------------------.----+
[6]
****************************************************************/
int dy = r.Height() / ARROW_BODY_RATIO;
points.Add(CPoint(r.right, r.top + r.Height() / 2)); // [0]
points.Add(CPoint(r.right - r.Height() / 2, r.top)); // [1]
points.Add(CPoint(points[1].x, points[0].y - dy)); // [2]
points.Add(CPoint(r.left, points[2].y)); // [3]
points.Add(CPoint(r.left, points[0].y + dy)); // [4]
points.Add(CPoint(points[1].x, points[4].y)); // [5]
points.Add(CPoint(points[1].x, r.bottom)); // [6]
dc.BeginPath();
dc.Polyline(points.GetData(), points.GetSize());
dc.CloseFigure();
dc.EndPath();
dc.StrokeAndFillPath();
} /* right */
break;
default:
ASSERT(FALSE); // only up and down implemented right now
break;
} /* direction */
} // DrawArrow
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