private static void DrawTextInternal(
IDeviceContext dc,
string?text,
Font?font,
Rectangle bounds,
Color foreColor,
Color backColor = default,
User32.DT flags = User32.DT.CENTER | User32.DT.VCENTER)
{
if (dc is null)
{
throw new ArgumentNullException(nameof(dc));
}
// Avoid creating the HDC, etc if we're not going to do any drawing
if (string.IsNullOrEmpty(text) || foreColor == Color.Transparent)
{
return;
}
// This MUST come before retreiving the HDC, which locks the Graphics object
Gdi32.QUALITY quality = FontQualityFromTextRenderingHint(dc);
using var hdc = new DeviceContextHdcScope(dc, applyGraphicsState: false);
using WindowsGraphics wg = WindowsGraphics.FromHdc(hdc);
using WindowsFont? wf = WindowsGraphicsCacheManager.GetWindowsFont(font, quality);
wg.DrawText(text, wf, bounds, foreColor, backColor, flags);
}
/// <include file='doc\TextRenderer.uex' path='docs/doc[@for="TextRenderer.DrawText1"]/*' />
public static void DrawText(IDeviceContext dc, string text, Font font, Point pt, Color foreColor, Color backColor)
{
if (dc == null)
{
throw new ArgumentNullException("dc");
}
WindowsFontQuality fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics);
IntPtr hdc = dc.GetHdc();
try
{
using (WindowsGraphics wg = WindowsGraphics.FromHdc(hdc))
{
using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality)) {
wg.DrawText(text, wf, pt, foreColor, backColor);
}
}
}
finally
{
dc.ReleaseHdc();
}
}
public static void DrawText(IDeviceContext dc, string text, Font font, Rectangle bounds, Color foreColor)
{
if (dc == null)
{
throw new ArgumentNullException(nameof(dc));
}
Gdi32.QUALITY fontQuality = WindowsFont.WindowsFontQualityFromTextRenderingHint(dc as Graphics);
IntPtr hdc = dc.GetHdc();
try
{
using (WindowsGraphics wg = WindowsGraphics.FromHdc(hdc))
{
using (WindowsFont wf = WindowsGraphicsCacheManager.GetWindowsFont(font, fontQuality))
{
wg.DrawText(text, wf, bounds, foreColor);
}
}
}
finally
{
dc.ReleaseHdc();
}
}
private void DrawGroupBox(PaintEventArgs e)
{
Graphics graphics = e.Graphics;
Rectangle clientRectangle = base.ClientRectangle;
int num = 8;
Color disabledColor = base.DisabledColor;
Pen pen = new Pen(ControlPaint.Light(disabledColor, 1f));
Pen pen2 = new Pen(ControlPaint.Dark(disabledColor, 0f));
clientRectangle.X += num;
clientRectangle.Width -= 2 * num;
try
{
Size size;
int num2;
if (this.UseCompatibleTextRendering)
{
using (Brush brush = new SolidBrush(this.ForeColor))
{
using (StringFormat format = new StringFormat())
{
format.HotkeyPrefix = this.ShowKeyboardCues ? HotkeyPrefix.Show : HotkeyPrefix.Hide;
if (this.RightToLeft == RightToLeft.Yes)
{
format.FormatFlags |= StringFormatFlags.DirectionRightToLeft;
}
size = Size.Ceiling(graphics.MeasureString(this.Text, this.Font, clientRectangle.Width, format));
if (base.Enabled)
{
graphics.DrawString(this.Text, this.Font, brush, clientRectangle, format);
}
else
{
ControlPaint.DrawStringDisabled(graphics, this.Text, this.Font, disabledColor, clientRectangle, format);
}
}
goto Label_01E7;
}
}
using (WindowsGraphics graphics2 = WindowsGraphics.FromGraphics(graphics))
{
IntTextFormatFlags flags = IntTextFormatFlags.TextBoxControl | IntTextFormatFlags.WordBreak;
if (!this.ShowKeyboardCues)
{
flags |= IntTextFormatFlags.HidePrefix;
}
if (this.RightToLeft == RightToLeft.Yes)
{
flags |= IntTextFormatFlags.RightToLeft;
flags |= IntTextFormatFlags.Right;
}
using (WindowsFont font = WindowsGraphicsCacheManager.GetWindowsFont(this.Font))
{
size = graphics2.MeasureText(this.Text, font, new Size(clientRectangle.Width, 0x7fffffff), flags);
if (base.Enabled)
{
graphics2.DrawText(this.Text, font, clientRectangle, this.ForeColor, flags);
}
else
{
ControlPaint.DrawStringDisabled(graphics2, this.Text, this.Font, disabledColor, clientRectangle, (TextFormatFlags)flags);
}
}
}
Label_01E7:
num2 = num;
if (this.RightToLeft == RightToLeft.Yes)
{
num2 += clientRectangle.Width - size.Width;
}
int num3 = Math.Min((int)(num2 + size.Width), (int)(base.Width - 6));
int num4 = base.FontHeight / 2;
graphics.DrawLine(pen, 1, num4, 1, base.Height - 1);
graphics.DrawLine(pen2, 0, num4, 0, base.Height - 2);
graphics.DrawLine(pen, 0, base.Height - 1, base.Width, base.Height - 1);
graphics.DrawLine(pen2, 0, base.Height - 2, base.Width - 1, base.Height - 2);
graphics.DrawLine(pen2, 0, num4 - 1, num2, num4 - 1);
graphics.DrawLine(pen, 1, num4, num2, num4);
graphics.DrawLine(pen2, num3, num4 - 1, base.Width - 2, num4 - 1);
graphics.DrawLine(pen, num3, num4, base.Width - 1, num4);
graphics.DrawLine(pen, (int)(base.Width - 1), (int)(num4 - 1), (int)(base.Width - 1), (int)(base.Height - 1));
graphics.DrawLine(pen2, base.Width - 2, num4, base.Width - 2, base.Height - 2);
}
finally
{
pen.Dispose();
pen2.Dispose();
}
}
private void DrawGroupBox(PaintEventArgs e)
{
Graphics graphics = e.Graphics;
Rectangle textRectangle = ClientRectangle; // Max text bounding box passed to drawing methods to support RTL.
int textOffset = 8; // Offset from the left bound.
Color backColor = DisabledColor;
Pen light = new Pen(ControlPaint.Light(backColor, 1.0f));
Pen dark = new Pen(ControlPaint.Dark(backColor, 0f));
Size textSize;
textRectangle.X += textOffset;
textRectangle.Width -= 2 * textOffset;
try {
if (UseCompatibleTextRendering)
{
using (Brush textBrush = new SolidBrush(ForeColor)){
using (StringFormat format = new StringFormat()){
format.HotkeyPrefix = ShowKeyboardCues ? System.Drawing.Text.HotkeyPrefix.Show : System.Drawing.Text.HotkeyPrefix.Hide;
// Adjust string format for Rtl controls
if (RightToLeft == RightToLeft.Yes)
{
format.FormatFlags |= StringFormatFlags.DirectionRightToLeft;
}
textSize = Size.Ceiling(graphics.MeasureString(Text, Font, textRectangle.Width, format));
if (Enabled)
{
graphics.DrawString(Text, Font, textBrush, textRectangle, format);
}
else
{
ControlPaint.DrawStringDisabled(graphics, Text, Font, backColor, textRectangle, format);
}
}
}
}
else
{
using (WindowsGraphics wg = WindowsGraphics.FromGraphics(graphics)){
IntTextFormatFlags flags = IntTextFormatFlags.WordBreak | IntTextFormatFlags.TextBoxControl;
if (!ShowKeyboardCues)
{
flags |= IntTextFormatFlags.HidePrefix;
}
if (RightToLeft == RightToLeft.Yes)
{
flags |= IntTextFormatFlags.RightToLeft;
flags |= IntTextFormatFlags.Right;
}
using (WindowsFont wfont = WindowsGraphicsCacheManager.GetWindowsFont(this.Font)) {
textSize = wg.MeasureText(Text, wfont, new Size(textRectangle.Width, int.MaxValue), flags);
if (Enabled)
{
wg.DrawText(Text, wfont, textRectangle, ForeColor, flags);
}
else
{
ControlPaint.DrawStringDisabled(wg, Text, Font, backColor, textRectangle, ((TextFormatFlags)flags));
}
}
}
}
int textLeft = textOffset; // Left side of binding box (independent on RTL).
if (RightToLeft == RightToLeft.Yes)
{
textLeft += textRectangle.Width - textSize.Width;
}
// Math.Min to assure we paint at least a small line.
int textRight = Math.Min(textLeft + textSize.Width, Width - 6);
int boxTop = FontHeight / 2;
if (SystemInformation.HighContrast && AccessibilityImprovements.Level1)
{
Color boxColor;
if (Enabled)
{
boxColor = ForeColor;
}
else
{
boxColor = SystemColors.GrayText;
}
bool needToDispose = !boxColor.IsSystemColor;
Pen boxPen = null;
try {
if (needToDispose)
{
boxPen = new Pen(boxColor);
}
else
{
boxPen = SystemPens.FromSystemColor(boxColor);
}
// left
graphics.DrawLine(boxPen, 0, boxTop, 0, Height);
//bottom
graphics.DrawLine(boxPen, 0, Height - 1, Width, Height - 1);
//top-left
graphics.DrawLine(boxPen, 0, boxTop, textLeft, boxTop);
//top-right
graphics.DrawLine(boxPen, textRight, boxTop, Width - 1, boxTop);
//right
graphics.DrawLine(boxPen, Width - 1, boxTop, Width - 1, Height - 1);
}
finally {
if (needToDispose && boxPen != null)
{
boxPen.Dispose();
}
}
}
else
{
// left
graphics.DrawLine(light, 1, boxTop, 1, Height - 1);
graphics.DrawLine(dark, 0, boxTop, 0, Height - 2);
// bottom
graphics.DrawLine(light, 0, Height - 1, Width, Height - 1);
graphics.DrawLine(dark, 0, Height - 2, Width - 1, Height - 2);
// top-left
graphics.DrawLine(dark, 0, boxTop - 1, textLeft, boxTop - 1);
graphics.DrawLine(light, 1, boxTop, textLeft, boxTop);
// top-right
graphics.DrawLine(dark, textRight, boxTop - 1, Width - 2, boxTop - 1);
graphics.DrawLine(light, textRight, boxTop, Width - 1, boxTop);
// right
graphics.DrawLine(light, Width - 1, boxTop - 1, Width - 1, Height - 1);
graphics.DrawLine(dark, Width - 2, boxTop, Width - 2, Height - 2);
}
}
finally {
light.Dispose();
dark.Dispose();
}
}