private bool checkLineProximity(int indexno, int identifier, Graphics daGe) //checks whether if the mouse pointer is on an object (i.e. shape)
{
Graphics g = daGe;
Pen lePen = new Pen(Color.Yellow, 1);
//g = this.CreateGraphics();
g.TranslateTransform(8, canvasHeight + 8); //transforms point-of-origin to the lower left corner of the canvas.
g.SmoothingMode = SmoothingMode.HighQuality;
switch (identifier) //depending on the "identifier" value, the relevant object will be highlighted
{
case 2: //Line
{
Line line = (Line)drawingList[indexno];
if (mainScale == 0)
{
mainScale = 1;
}
if (line.Highlight(lePen, g, aPoint, mainScale))
{
this.Cursor = Cursors.Hand;
line.highlighted = true;
return(true);
}
break;
}
case 3: //rectangle
{
rectangle rect = (rectangle)drawingList[indexno];
if (rect.Highlight(lePen, g, aPoint))
{
this.Cursor = Cursors.Hand;
rect.highlighted = true;
return(true);
}
break;
}
case 4: //circle
{
circle tempCircle = (circle)drawingList[indexno];
if (mainScale == 0)
{
mainScale = 1;
}
if (tempCircle.Highlight(lePen, g, aPoint, mainScale))
{
this.Cursor = Cursors.Hand;
tempCircle.highlighted = true;
return(true);
}
break;
}
case 5: //polyline
{
polyline tempPoly = (polyline)drawingList[indexno];
if (mainScale == 0)
{
mainScale = 1;
}
if (tempPoly.Highlight(lePen, g, aPoint, mainScale))
{
this.Cursor = Cursors.Hand;
tempPoly.highlighted = true;
return(true);
}
break;
}
case 6: //arc
{
Arc tempArc = (Arc)drawingList[indexno];
if (mainScale == 0)
{
mainScale = 1;
}
if (tempArc.Highlight(lePen, g, aPoint, mainScale))
{
this.Cursor = Cursors.Hand;
tempArc.highlighted = true;
return(true);
}
break;
}
}
return(false);
}
private void PolylineModule(StreamReader reader) //Interpretes polyline objects in the DXF file
{
string line1, line2;
line1 = "0";
line2 = "0";
double x1 = 0;
double y1 = 0;
//double x2= 0;
//double y2 = 0;
thePolyLine = new polyline(Color.White, 1);
int ix = drawingList.Add(thePolyLine);
objectIdentifier.Add(new DrawingObject(5, ix));
int counter = 0;
int numberOfVertices = 1;
int openOrClosed = 0;
ArrayList pointList = new ArrayList();
do
{
GetLineCouple(reader, out line1, out line2);
if (line1 == "90")
{
numberOfVertices = Convert.ToInt32(line2);
}
if (line1 == "70")
{
openOrClosed = Convert.ToInt32(line2);
}
if (line1 == "10")
{
x1 = Convert.ToDouble(line2);
if (x1 > XMax)
{
XMax = x1;
}
if (x1 < XMin)
{
XMin = x1;
}
}
if (line1 == "20")
{
y1 = Convert.ToDouble(line2);
if (y1 > YMax)
{
YMax = y1;
}
if (y1 < YMin)
{
YMin = y1;
}
pointList.Add(new Point((int)(x1 * importScale), (int)-(y1 * importScale)));
counter++;
}
}while(counter < numberOfVertices);
//****************************************************************************************************//
//***************This Part is related with the drawing editor...the data taken from the dxf file******//
//***************is interpreted hereinafter***********************************************************//
for (int i = 1; i < numberOfVertices; i++)
{
thePolyLine.AppendLine(new Line((Point)pointList[i - 1], (Point)pointList[i], Color.White, 1));
}
if (openOrClosed == 1)
{
thePolyLine.AppendLine(new Line((Point)pointList[numberOfVertices - 1], (Point)pointList[0], Color.White, 1));
}
if ((Math.Abs(XMax - XMin)) > canvasWidth)
{
scaleX = (double)(canvasWidth) / (double)(Math.Abs(XMax - XMin));
}
else
{
scaleX = 1;
}
if ((Math.Abs(YMax - YMin)) > canvasHeight)
{
scaleY = (double)(canvasHeight) / (double)(Math.Abs(YMax - YMin));
}
else
{
scaleY = 1;
}
mainScale = Math.Min(scaleX, scaleY);
//////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////
}
public void Draw(Graphics g)
{
//int xOffSet = 0;
Pen lePen = new Pen(Color.White, 3);
Size scrollOffset = new Size(this.AutoScrollPosition);
g.TranslateTransform(1 + scrollOffset.Width, canvasHeight - 1 + scrollOffset.Height);
if (YMin < 0)
{
g.TranslateTransform(0, -(int)Math.Abs(YMin)); //transforms point-of-origin to the lower left corner of the canvas.
}
if (XMin < 0)
{
g.TranslateTransform((int)Math.Abs(XMin), 0);
}
// g.SmoothingMode = SmoothingMode.AntiAlias;
showForks(g, lePen.Brush);
foreach (DrawingObject obj in objectIdentifier) //iterates through the objects
{
switch (obj.shapeType)
{
case 2: //line
{
Line temp = (Line)drawingList[obj.indexNo];
lePen.Color = temp.ContourColor;
lePen.Width = temp.LineWidth;
highlightedRegion.Location = temp.GetStartPoint;
highlightedRegion.Width = temp.GetStartPoint.X - temp.GetEndPoint.X;
highlightedRegion.Height = temp.GetStartPoint.Y - temp.GetEndPoint.Y;
int centerX = (temp.GetStartPoint.X + temp.GetEndPoint.X) / 2;
int centerY = (temp.GetStartPoint.Y + temp.GetEndPoint.Y) / 2;
if (mainScale == 0)
{
mainScale = 1;
}
temp.Draw(lePen, g, mainScale);
g.DrawString("L" + obj.indexNo, new Font("宋体", 10), lePen.Brush, centerX, centerY);
break;
}
case 3: //rectangle
{
rectangle temp = (rectangle)drawingList[obj.indexNo];
lePen.Color = temp.ContourColor;
lePen.Width = temp.LineWidth;
temp.Draw(lePen, g);
break;
}
case 4: //circle
{
circle temp = (circle)drawingList[obj.indexNo];
lePen.Color = temp.ContourColor;
lePen.Width = temp.LineWidth;
if (mainScale == 0)
{
mainScale = 1;
}
temp.Draw(lePen, g, mainScale);
break;
}
case 5: //polyline
{
polyline temp = (polyline)drawingList[obj.indexNo];
lePen.Color = temp.ContourColor;
lePen.Width = temp.LineWidth;
if (mainScale == 0)
{
mainScale = 1;
}
temp.Draw(lePen, g, mainScale);
break;
}
case 6: //arc
{
Arc temp = (Arc)drawingList[obj.indexNo];
lePen.Color = temp.ContourColor;
lePen.Width = temp.LineWidth;
if (mainScale == 0)
{
mainScale = 1;
}
temp.Draw(lePen, g, mainScale);
g.DrawString("A" + obj.indexNo, new Font("宋体", 10), lePen.Brush, temp.CenterPoint);
break;
}
}
}
// g.Dispose(); //not disposed because "g" is get from the paintbackground event..
lePen.Dispose();
}