internal static void DrawRectangle(this Gdi32.HDC hdc, Rectangle rectangle, Gdi32.HPEN hpen)
{
using var penScope = new Gdi32.SelectObjectScope(hdc, hpen);
using var ropScope = new Gdi32.SetRop2Scope(hdc, Gdi32.R2.COPYPEN);
using var brushScope = new Gdi32.SelectObjectScope(hdc, Gdi32.GetStockObject(Gdi32.StockObject.HOLLOW_BRUSH));
Gdi32.Rectangle(hdc, rectangle.X, rectangle.Y, rectangle.Right, rectangle.Bottom);
}
internal unsafe static void DrawLine(this Gdi32.HDC hdc, Gdi32.HPEN pen, int x1, int y1, int x2, int y2)
{
using var ropScope = new Gdi32.SetRop2Scope(hdc, Gdi32.R2.COPYPEN);
using var bkScope = new Gdi32.SetBkModeScope(hdc, Gdi32.BKMODE.TRANSPARENT);
using var selection = new Gdi32.SelectObjectScope(hdc, pen);
Point oldPoint = new Point();
Gdi32.MoveToEx(hdc, x1, y1, &oldPoint);
Gdi32.LineTo(hdc, x2, y2);
Gdi32.MoveToEx(hdc, oldPoint.X, oldPoint.Y, &oldPoint);
}
internal static void DrawRectangle(
this Gdi32.HDC hdc,
int left,
int top,
int right,
int bottom,
Gdi32.HPEN hpen)
{
using var penScope = new Gdi32.SelectObjectScope(hdc, hpen);
using var ropScope = new Gdi32.SetRop2Scope(hdc, Gdi32.R2.COPYPEN);
using var brushScope = new Gdi32.SelectObjectScope(hdc, Gdi32.GetStockObject(Gdi32.StockObject.NULL_BRUSH));
Gdi32.Rectangle(hdc, left, top, right, bottom);
}
/// <summary>
/// Draws lines with the <paramref name="hpen"/> using points defined in <paramref name="lines"/>.
/// </summary>
/// <param name="lines">
/// MUST be a mulitple of 4. Each group of 4 represents x1, y1, x2, y2.
/// </param>
internal unsafe static void DrawLines(this Gdi32.HDC hdc, Gdi32.HPEN hpen, ReadOnlySpan <int> lines)
{
Debug.Assert((lines.Length % 4) == 0);
using var ropScope = new Gdi32.SetRop2Scope(hdc, Gdi32.R2.COPYPEN);
using var bkScope = new Gdi32.SetBkModeScope(hdc, Gdi32.BKMODE.TRANSPARENT);
using var selection = new Gdi32.SelectObjectScope(hdc, hpen);
Point oldPoint = new Point();
for (int i = 0; i < lines.Length; i += 4)
{
Gdi32.MoveToEx(hdc, lines[i], lines[i + 1], &oldPoint);
Gdi32.LineTo(hdc, lines[i + 2], lines[i + 3]);
Gdi32.MoveToEx(hdc, oldPoint.X, oldPoint.Y, null);
}
}
private void DrawReversibleFrame(IntPtr handle, Rectangle rectangle, Color backColor)
{
//Bug # 71547 <subhag> to make drag rect visible if any the dimensions of the control are 0
if (rectangle.Width == 0)
{
rectangle.Width = 5;
}
if (rectangle.Height == 0)
{
rectangle.Height = 5;
}
// Copy of ControlPaint.DrawReversibleFrame, see VSWhidbey 581670
// If ControlPaint ever gets overrloaded, we should replace the code below by calling it:
// ControlPaint.DrawReversibleFrame(handle, rectangle, backColor, FrameStyle.Thick);
// ------ Duplicate code----------------------------------------------------------
Gdi32.R2 rop2;
Color graphicsColor;
if (backColor.GetBrightness() < .5)
{
rop2 = Gdi32.R2.NOTXORPEN;
graphicsColor = Color.White;
}
else
{
rop2 = Gdi32.R2.XORPEN;
graphicsColor = Color.Black;
}
using var dc = new User32.GetDcScope(handle);
using var pen = new Gdi32.ObjectScope(Gdi32.CreatePen(Gdi32.PS.SOLID, 2, ColorTranslator.ToWin32(backColor)));
using var rop2Scope = new Gdi32.SetRop2Scope(dc, rop2);
using var brushSelection = new Gdi32.SelectObjectScope(dc, Gdi32.GetStockObject(Gdi32.StockObject.NULL_BRUSH));
using var penSelection = new Gdi32.SelectObjectScope(dc, pen);
Gdi32.SetBkColor(dc, ColorTranslator.ToWin32(graphicsColor));
Gdi32.Rectangle(dc, rectangle.X, rectangle.Y, rectangle.Right, rectangle.Bottom);
// ------ Duplicate code----------------------------------------------------------
}
