private void RealPaintingPanel_Paint(object sender, PaintEventArgs e)
{
//https://stackoverflow.com/questions/1485745/flip-coordinates-when-drawing-to-control
// Call the OnPaint method of the base class.
base.OnPaint(e);
// Begin graphics container
System.Drawing.Drawing2D.GraphicsContainer containerState = e.Graphics.BeginContainer();
double offset2X = 0.0; double offset2Y = 0.0;
// Flip the Y-Axis
e.Graphics.ScaleTransform(1.0F, -1.0F);
e.Graphics.TranslateTransform(0.0F, -(float)Height + 1.0f);
e.Graphics.Clear(Color.White);
//let's have all entries shown on field, no matter how far or close are they located
double deltaDrawingOffsetX = (0 - structToRender.GetBoundingBox().XLowerLeft) * internalScaleFactor;
double deltaDrawingOffsetY = (0 - structToRender.GetBoundingBox().YLowerLeft) * internalScaleFactor;
// do not cling pixel-to-pixel to lower bottom
double deltaTinyOffsetW = Math.Abs(1 - prescaleKoefficient) / 2.0 * this.Width;
double deltaTinyOffsetH = Math.Abs(1 - prescaleKoefficient) / 2.0 * this.Height;
//render all
using (System.Drawing.Pen myPen = new System.Drawing.Pen(Color.Black))
{
int totalNumber = structToRender.getSize();
for (int i = 0; i < totalNumber; i++)
{
DXFdrawingEntry tmpEntryFromList = structToRender.getItemByIndex(i);
if (tmpEntryFromList is MyDxfLine)
{
e.Graphics.DrawLine(myPen,
(float)((tmpEntryFromList as MyDxfLine).XStart * internalScaleFactor + deltaDrawingOffsetX + deltaTinyOffsetW),
(float)((tmpEntryFromList as MyDxfLine).YStart * internalScaleFactor + deltaDrawingOffsetY + deltaTinyOffsetH),
(float)((tmpEntryFromList as MyDxfLine).XEnd * internalScaleFactor + deltaDrawingOffsetX + deltaTinyOffsetW),
(float)((tmpEntryFromList as MyDxfLine).YEnd * internalScaleFactor + deltaDrawingOffsetY + deltaTinyOffsetH));
}
else if (tmpEntryFromList is MyDxfArc)
{
//width and height (3 and 4 parametrs) should be scaled and not translated
e.Graphics.DrawArc(myPen,
(float)((tmpEntryFromList as MyDxfArc).drawUpperLeftX * internalScaleFactor + deltaDrawingOffsetX + deltaTinyOffsetW),
(float)((tmpEntryFromList as MyDxfArc).drawUpperLeftY * internalScaleFactor + deltaDrawingOffsetY + deltaTinyOffsetH),
(float)((tmpEntryFromList as MyDxfArc).drawDimensionHorizontal * internalScaleFactor),
(float)((tmpEntryFromList as MyDxfArc).drawDimensionVertical * internalScaleFactor),
(float)((tmpEntryFromList as MyDxfArc).drawStartAngleDegreeCW),
(float)((tmpEntryFromList as MyDxfArc).drawSweepAngleDegree));
}
}
}
e.Graphics.EndContainer(containerState);
}
/// <summary>
/// Setup only INITIAL logical and graphical datastructures.
/// </summary>
/// <param name="in_savedStructureOfDxf">Logical structure of DXF as read from file</param>
public void setupLogicalAndGraphicalDXFstructures(LOGICAL.completeDxfStruct in_savedStructureOfDxf)
{
savedStructureOfDxf = in_savedStructureOfDxf;
//generate primal drawing structure
MyDxfBoundingBox obtainedBox2 = savedStructureOfDxf.GetBoundingBox();
if (obtainedBox2.XLowerLeft != 0)
{
offsetOfDxfHorizontal = 0 - obtainedBox2.XLowerLeft;
}
if (obtainedBox2.YLowerLeft != 0)
{
offsetOfDxfVertical = 0 - obtainedBox2.YLowerLeft;
}
primalDrawingStructure = new CompleteDxfDrawingStruct(null);
int currentSizeOfDxfStruct = savedStructureOfDxf.getSize();
for (int i = 0; i < currentSizeOfDxfStruct; i++)
{
DXFdrawingEntry someEntry = savedStructureOfDxf.getItemByIndex(i);
MyDxfBoundingBox obtainedBox = someEntry.GetBoundingBox();
//offsets to centralize the drawing in the box
Pen usedPen = null;
if ((collectionOfLayerDefinitions != null) && (collectionOfLayerDefinitions.ContainsKey(someEntry.layerIdentifier)))
{
usedPen = collectionOfLayerDefinitions[someEntry.layerIdentifier].Item2;
}
else
{
usedPen = new Pen(Color.Black);
}
if (someEntry is MyDxfLine)
{
MyDxfLine castLine = someEntry as MyDxfLine;
DXFentryForDisplay theLineForDisplay = new MyDxfLineForDisplay(castLine.XStart + offsetOfDxfHorizontal, castLine.YStart + offsetOfDxfVertical, castLine.XEnd + offsetOfDxfHorizontal, castLine.YEnd + offsetOfDxfVertical, usedPen);
primalDrawingStructure.addSingleEntry(theLineForDisplay, obtainedBox.XLowerLeft + offsetOfDxfHorizontal, obtainedBox.YLowerLeft + offsetOfDxfVertical, obtainedBox.XUpperRight + offsetOfDxfHorizontal, obtainedBox.YUpperRight + offsetOfDxfVertical);
}
else if (someEntry is MyDxfArc)
{
MyDxfArc castArc = someEntry as MyDxfArc;
DXFentryForDisplay theArcForDisplay = new MyDxfArcForDisplay(castArc.XCenter + offsetOfDxfHorizontal, castArc.YCenter + offsetOfDxfVertical, castArc.Radius, castArc.StartAngleDegree, castArc.EndAngleDegree, usedPen);
primalDrawingStructure.addSingleEntry(theArcForDisplay, obtainedBox.XLowerLeft + offsetOfDxfHorizontal, obtainedBox.YLowerLeft + offsetOfDxfVertical, obtainedBox.XUpperRight + offsetOfDxfHorizontal, obtainedBox.YUpperRight + offsetOfDxfVertical);
}
}
//performing flip on draw structure is done by means of graphical container
}
