internal static extern void DrawThemeBackground(
IntPtr hTheme,
IntPtr hdc,
int iPartId,
int iStateId,
ref NativeStructs.RECT pRect,
ref NativeStructs.RECT pClipRect);
internal extern static int FillRect(
IntPtr hDC,
ref NativeStructs.RECT lprc,
IntPtr hbr);
internal static extern int DrawTextW(
IntPtr hdc,
string lpString,
int nCount,
ref NativeStructs.RECT lpRect,
uint uFormat);
// TODO: Use VisualStyles stuff in .NET 2.0 instead
/// <summary>
/// Draws a button in the appropriate system theme (Aero vs. Luna vs. Classic).
/// </summary>
/// <remarks>
/// Note to implementors: This may be implemented as a simple thunk to ControlPaint.DrawButton().
/// </remarks>
public static void DrawThemedButton(
Control hostControl,
Graphics g,
int x,
int y,
int width,
int height,
UI.ButtonState state)
{
IntPtr hTheme = OpenTheme(hostControl);
if (hTheme != IntPtr.Zero)
{
NativeStructs.RECT rect = new NativeStructs.RECT();
rect.left = x;
rect.top = y;
rect.right = x + width;
rect.bottom = y + height;
int iState;
switch (state)
{
case UI.ButtonState.Disabled:
iState = NativeConstants.PBS_DISABLED;
break;
case UI.ButtonState.Hot:
iState = NativeConstants.PBS_HOT;
break;
default:
case UI.ButtonState.Normal:
iState = NativeConstants.PBS_NORMAL;
break;
case UI.ButtonState.Pressed:
iState = NativeConstants.PBS_PRESSED;
break;
}
IntPtr hdc = g.GetHdc();
SafeNativeMethods.DrawThemeBackground(
hTheme,
hdc,
NativeConstants.BP_PUSHBUTTON,
iState,
ref rect,
ref rect);
g.ReleaseHdc(hdc);
SafeNativeMethods.CloseThemeData(hTheme);
hTheme = IntPtr.Zero;
}
else
{
System.Windows.Forms.ButtonState swfState;
switch (state)
{
case UI.ButtonState.Disabled:
swfState = System.Windows.Forms.ButtonState.Inactive;
break;
default:
case UI.ButtonState.Hot:
case UI.ButtonState.Normal:
swfState = System.Windows.Forms.ButtonState.Normal;
break;
case UI.ButtonState.Pressed:
swfState = System.Windows.Forms.ButtonState.Pushed;
break;
}
ControlPaint.DrawButton(g, x, y, width, height, swfState);
}
GC.KeepAlive(hostControl);
}
/// <summary>
/// Measures text with the given graphics context, font, string, location, and anti-aliasing flag.
/// </summary>
/// <param name="g">The Graphics context to measure for.</param>
/// <param name="font">The Font to measure with.</param>
/// <param name="text">The string of text to measure.</param>
/// <param name="antiAliasing">Whether the font should be rendered with anti-aliasing.</param>
public static Size MeasureString(Graphics g, Font font, string text, bool antiAliasing, FontSmoothing fontSmoothing)
{
if (fontSmoothing == FontSmoothing.Smooth && antiAliasing)
{
PixelOffsetMode oldPOM = g.PixelOffsetMode;
g.PixelOffsetMode = PixelOffsetMode.Half;
TextRenderingHint oldTRH = g.TextRenderingHint;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
StringFormat format = (StringFormat)StringFormat.GenericTypographic.Clone();
format.FormatFlags |= StringFormatFlags.MeasureTrailingSpaces;
SizeF sf = g.MeasureString(text, font, new PointF(0, 0), format);
sf.Height = font.GetHeight();
g.PixelOffsetMode = oldPOM;
g.TextRenderingHint = oldTRH;
return(Size.Ceiling(sf));
}
else if (fontSmoothing == FontSmoothing.Sharp || !antiAliasing)
{
IntPtr hdc = IntPtr.Zero;
IntPtr hFont = IntPtr.Zero;
IntPtr hOldObject = IntPtr.Zero;
try
{
hdc = g.GetHdc();
hFont = CreateFontObject(font, antiAliasing);
hOldObject = SafeNativeMethods.SelectObject(hdc, hFont);
NativeStructs.RECT rect = new NativeStructs.RECT();
rect.left = 0;
rect.top = 0;
rect.right = rect.left;
rect.bottom = rect.top;
int result = SafeNativeMethods.DrawTextW(
hdc,
text,
text.Length,
ref rect,
NativeConstants.DT_CALCRECT |
NativeConstants.DT_LEFT |
NativeConstants.DT_NOCLIP |
NativeConstants.DT_NOPREFIX |
NativeConstants.DT_SINGLELINE |
NativeConstants.DT_TOP);
if (result == 0)
{
NativeMethods.ThrowOnWin32Error("DrawTextW returned 0");
}
return(new Size(rect.right - rect.left, rect.bottom - rect.top));
}
finally
{
if (hOldObject != IntPtr.Zero)
{
SafeNativeMethods.SelectObject(hdc, hOldObject);
hOldObject = IntPtr.Zero;
}
if (hFont != IntPtr.Zero)
{
SafeNativeMethods.DeleteObject(hFont);
hFont = IntPtr.Zero;
}
if (hdc != IntPtr.Zero)
{
g.ReleaseHdc(hdc);
hdc = IntPtr.Zero;
}
}
}
else
{
throw new InvalidEnumArgumentException("fontSmoothing = " + (int)fontSmoothing);
}
}
/// <summary>
/// Renders text with the given graphics context, font, string, location, and anti-aliasing flag.
/// </summary>
/// <param name="g">The Graphics context to render to.</param>
/// <param name="font">The Font to render with.</param>
/// <param name="text">The string of text to draw.</param>
/// <param name="pt">The offset of where to start drawing (upper-left of rendering rectangle).</param>
/// <param name="antiAliasing">Whether the font should be rendered with anti-aliasing.</param>
public static void DrawText(Graphics g, Font font, string text, Point pt, bool antiAliasing, FontSmoothing fontSmoothing)
{
if (fontSmoothing == FontSmoothing.Smooth && antiAliasing)
{
PixelOffsetMode oldPOM = g.PixelOffsetMode;
g.PixelOffsetMode = PixelOffsetMode.Half;
TextRenderingHint oldTRH = g.TextRenderingHint;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
StringFormat format = (StringFormat)StringFormat.GenericTypographic.Clone();
format.FormatFlags |= StringFormatFlags.MeasureTrailingSpaces;
g.DrawString(text, font, Brushes.Black, pt, format);
g.PixelOffsetMode = oldPOM;
g.TextRenderingHint = oldTRH;
}
else if (fontSmoothing == FontSmoothing.Sharp || !antiAliasing)
{
IntPtr hdc = IntPtr.Zero;
IntPtr hFont = IntPtr.Zero;
IntPtr hOldObject = IntPtr.Zero;
try
{
hdc = g.GetHdc();
hFont = CreateFontObject(font, antiAliasing);
hOldObject = SafeNativeMethods.SelectObject(hdc, hFont);
NativeStructs.RECT rect = new NativeStructs.RECT();
rect.left = pt.X;
rect.top = pt.Y;
rect.right = rect.left;
rect.bottom = rect.top;
int result = SafeNativeMethods.DrawTextW(
hdc,
text,
text.Length,
ref rect,
NativeConstants.DT_LEFT |
NativeConstants.DT_NOCLIP |
NativeConstants.DT_NOPREFIX |
NativeConstants.DT_SINGLELINE |
NativeConstants.DT_TOP);
if (result == 0)
{
NativeMethods.ThrowOnWin32Error("DrawTextW returned 0");
}
}
finally
{
if (hOldObject != IntPtr.Zero)
{
SafeNativeMethods.SelectObject(hdc, hOldObject);
hOldObject = IntPtr.Zero;
}
if (hFont != IntPtr.Zero)
{
SafeNativeMethods.DeleteObject(hFont);
hFont = IntPtr.Zero;
}
if (hdc != IntPtr.Zero)
{
g.ReleaseHdc(hdc);
hdc = IntPtr.Zero;
}
}
}
else
{
throw new InvalidEnumArgumentException("fontSmoothing = " + (int)fontSmoothing);
}
}
// TODO: Use VisualStyles stuff in .NET 2.0 instead
/// <summary>
/// Draws a button in the appropriate system theme (Aero vs. Luna vs. Classic).
/// </summary>
/// <remarks>
/// Note to implementors: This may be implemented as a simple thunk to ControlPaint.DrawButton().
/// </remarks>
public static void DrawThemedButton(
Control hostControl,
Graphics g,
int x,
int y,
int width,
int height,
UI.ButtonState state)
{
IntPtr hTheme = OpenTheme(hostControl);
if (hTheme != IntPtr.Zero)
{
NativeStructs.RECT rect = new NativeStructs.RECT();
rect.left = x;
rect.top = y;
rect.right = x + width;
rect.bottom = y + height;
int iState;
switch (state)
{
case UI.ButtonState.Disabled:
iState = NativeConstants.PBS_DISABLED;
break;
case UI.ButtonState.Hot:
iState = NativeConstants.PBS_HOT;
break;
default:
case UI.ButtonState.Normal:
iState = NativeConstants.PBS_NORMAL;
break;
case UI.ButtonState.Pressed:
iState = NativeConstants.PBS_PRESSED;
break;
}
IntPtr hdc = g.GetHdc();
SafeNativeMethods.DrawThemeBackground(
hTheme,
hdc,
NativeConstants.BP_PUSHBUTTON,
iState,
ref rect,
ref rect);
g.ReleaseHdc(hdc);
SafeNativeMethods.CloseThemeData(hTheme);
hTheme = IntPtr.Zero;
}
else
{
System.Windows.Forms.ButtonState swfState;
switch (state)
{
case UI.ButtonState.Disabled:
swfState = System.Windows.Forms.ButtonState.Inactive;
break;
default:
case UI.ButtonState.Hot:
case UI.ButtonState.Normal:
swfState = System.Windows.Forms.ButtonState.Normal;
break;
case UI.ButtonState.Pressed:
swfState = System.Windows.Forms.ButtonState.Pushed;
break;
}
ControlPaint.DrawButton(g, x, y, width, height, swfState);
}
GC.KeepAlive(hostControl);
}