public void DrawRectangle(WindowsPen pen, int x, int y, int width, int height)
{
Debug.Assert(pen != null, "pen == null");
HandleRef hdc = new HandleRef(DeviceContext, DeviceContext.Hdc);
if (pen != null)
{
DeviceContext.SelectObject(pen.HPen, GdiObjectType.Pen);
}
Gdi32.R2 rasterOp = DeviceContext.BinaryRasterOperation;
if (rasterOp != Gdi32.R2.COPYPEN)
{
rasterOp = DeviceContext.SetRasterOperation(Gdi32.R2.COPYPEN);
}
Gdi32.SelectObject(hdc, Gdi32.GetStockObject(Gdi32.StockObject.HOLLOW_BRUSH));
// Add 1 to width and height to create the 'bounding box' (convert from point to size).
IntUnsafeNativeMethods.Rectangle(hdc, x, y, x + width, y + height);
if (rasterOp != Gdi32.R2.COPYPEN)
{
DeviceContext.SetRasterOperation(rasterOp);
}
}
public unsafe void DrawLine(WindowsPen pen, int x1, int y1, int x2, int y2)
{
HandleRef hdc = new HandleRef(DeviceContext, DeviceContext.Hdc);
Gdi32.R2 rasterOp = DeviceContext.BinaryRasterOperation;
Gdi32.BKMODE bckMode = DeviceContext.BackgroundMode;
if (rasterOp != Gdi32.R2.COPYPEN)
{
rasterOp = DeviceContext.SetRasterOperation(Gdi32.R2.COPYPEN);
}
if (bckMode != Gdi32.BKMODE.TRANSPARENT)
{
bckMode = DeviceContext.SetBackgroundMode(Gdi32.BKMODE.TRANSPARENT);
}
if (pen != null)
{
DeviceContext.SelectObject(pen.HPen, GdiObjectType.Pen);
}
Point oldPoint = new Point();
IntUnsafeNativeMethods.MoveToEx(hdc, x1, y1, &oldPoint);
IntUnsafeNativeMethods.LineTo(hdc, x2, y2);
if (bckMode != Gdi32.BKMODE.TRANSPARENT)
{
DeviceContext.SetBackgroundMode(bckMode);
}
if (rasterOp != Gdi32.R2.COPYPEN)
{
DeviceContext.SetRasterOperation(rasterOp);
}
IntUnsafeNativeMethods.MoveToEx(hdc, oldPoint.X, oldPoint.Y, &oldPoint);
}
public unsafe void DrawLine(WindowsPen pen, int x1, int y1, int x2, int y2)
{
HandleRef hdc = new HandleRef(DeviceContext, DeviceContext.Hdc);
DeviceContextBinaryRasterOperationFlags rasterOp = DeviceContext.BinaryRasterOperation;
DeviceContextBackgroundMode bckMode = DeviceContext.BackgroundMode;
if (rasterOp != DeviceContextBinaryRasterOperationFlags.CopyPen)
{
rasterOp = DeviceContext.SetRasterOperation(DeviceContextBinaryRasterOperationFlags.CopyPen);
}
if (bckMode != DeviceContextBackgroundMode.Transparent)
{
bckMode = DeviceContext.SetBackgroundMode(DeviceContextBackgroundMode.Transparent);
}
if (pen != null)
{
DeviceContext.SelectObject(pen.HPen, GdiObjectType.Pen);
}
Point oldPoint = new Point();
IntUnsafeNativeMethods.MoveToEx(hdc, x1, y1, &oldPoint);
IntUnsafeNativeMethods.LineTo(hdc, x2, y2);
if (bckMode != DeviceContextBackgroundMode.Transparent)
{
DeviceContext.SetBackgroundMode(bckMode);
}
if (rasterOp != DeviceContextBinaryRasterOperationFlags.CopyPen)
{
DeviceContext.SetRasterOperation(rasterOp);
}
IntUnsafeNativeMethods.MoveToEx(hdc, oldPoint.X, oldPoint.Y, &oldPoint);
}
