public override int RenderTextEx(IntPtr htheme,
IntPtr hdc,
int partid, int stateid,
string psztext, int cchtext,
NativeMethods.DT dwtextflags,
IntPtr prect, ref NativeMethods.DTTOPTS poptions)
{
switch ((Parts)partid)
{
case Parts.LVP_GROUPHEADER:
{
NativeMethods.GetThemeColor(htheme, partid, stateid, poptions.iColorPropId,
out var crefText);
var color = Color.FromArgb(crefText.R, crefText.G, crefText.B);
var adaptedColor = color.AdaptTextColor();
// do not render, just modify text color
poptions.iColorPropId = 0;
poptions.crText = ColorTranslator.ToWin32(adaptedColor);
// proceed to default implementation with modified poptions parameter
return(Unhandled);
}
}
return(Unhandled);
}
public override int RenderTextEx(IntPtr htheme, IntPtr hdc, int partid, int stateid,
string psztext, int cchtext, NativeMethods.DT dwtextflags,
IntPtr prect, ref NativeMethods.DTTOPTS poptions)
{
Color textColor;
switch ((Parts)partid)
{
case Parts.CP_READONLY:
switch ((State.Readonly)stateid)
{
case State.Readonly.CBRO_NORMAL:
case State.Readonly.CBRO_HOT:
case State.Readonly.CBRO_PRESSED:
textColor = SystemColors.ControlText;
break;
case State.Readonly.CBRO_DISABLED:
textColor = SystemColors.ControlDark;
break;
default:
return(Unhandled);
}
// do not render, just modify text color
poptions.dwFlags |= NativeMethods.DTT.TextColor;
poptions.iColorPropId = 0;
poptions.crText = ColorTranslator.ToWin32(textColor);
return(Unhandled);
default:
return(Unhandled);
}
}
public virtual int RenderTextEx(IntPtr htheme,
IntPtr hdc,
int partid, int stateid,
string psztext, int cchtext,
NativeMethods.DT dwtextflags,
IntPtr prect, ref NativeMethods.DTTOPTS poptions)
{
return(Unhandled);
}
public override int RenderTextEx(IntPtr htheme, IntPtr hdc, int partid, int stateid,
string psztext, int cchtext,
NativeMethods.DT dwtextflags, IntPtr prect,
ref NativeMethods.DTTOPTS poptions)
{
switch ((Parts)partid)
{
case Parts.TVP_TREEITEM:
{
if (poptions.dwFlags.HasFlag(NativeMethods.DTT.TextColor))
{
return(Unhandled);
}
Color foreColor;
switch ((State.Item)stateid)
{
case State.Item.TREIS_DISABLED:
foreColor = SystemColors.GrayText;
break;
case State.Item.TREIS_SELECTED:
case State.Item.TREIS_HOTSELECTED:
case State.Item.TREIS_SELECTEDNOTFOCUS:
foreColor = SystemColors.WindowText;
break;
case State.Item.TREIS_NORMAL:
case State.Item.TREIS_HOT:
foreColor = SystemColors.WindowText;
break;
default:
return(Unhandled);
}
// do not render, just modify text color
poptions.dwFlags |= NativeMethods.DTT.TextColor;
poptions.iColorPropId = 0;
poptions.crText = ColorTranslator.ToWin32(foreColor);
break;
}
}
return(Unhandled);
}
/// <summary>
/// Measures the specified string when drawn with the specified <see cref="Font"/> and formatted with the specified <see cref="StringFormat"/>.
/// </summary>
/// <param name="g">Graphics instance.</param>
/// <param name="text">String to measure.</param>
/// <param name="font"><see cref="Font"/> defines the text format of the string.</param>
/// <param name="layoutArea">SizeF structure that specifies the maximum layout area for the text.</param>
/// <param name="stringFormat"><see cref="StringFormat"/> that represents formatting information, such as line spacing, for the string.</param>
/// <returns>This method returns a <see cref="SizeF"/> structure that represents the size, in the units specified by the PageUnit property, of the string specified by the text parameter as drawn with the font parameter.</returns>
public static SizeF MeasureString(this Graphics g, string text, Font font, SizeF layoutArea, StringFormat stringFormat)
{
IntPtr hdc = g.GetHdc();
RECT r = new RECT();
r.right = Convert.ToInt32(layoutArea.Width);
r.bottom = Convert.ToInt32(layoutArea.Height);
NativeMethods.DT dt = NativeMethods.DT.CALCRECT | NativeMethods.DT.NOCLIP;
if (stringFormat != null)
{
switch (stringFormat.Alignment)
{
case StringAlignment.Near:
dt |= NativeMethods.DT.LEFT;
break;
case StringAlignment.Center:
dt |= NativeMethods.DT.CENTER;
break;
case StringAlignment.Far:
dt |= NativeMethods.DT.RIGHT;
break;
}
}
IntPtr hfont = font.ToHfont();
NativeMethods.GdiSelectObject(hdc, hfont);
int result = NativeMethods.GdiDrawText(hdc, text, -1, ref r, dt);
g.ReleaseHdc(hdc);
layoutArea.Width = r.right;
layoutArea.Height = r.bottom;
return(layoutArea);
}
public override int RenderTextEx(IntPtr htheme, IntPtr hdc, int partid, int stateid, string psztext, int cchtext, NativeMethods.DT dwtextflags, IntPtr prect, ref NativeMethods.DTTOPTS poptions)
{
// do not render, just modify text color
var textColor = GetTextColor((States)stateid);
poptions.crText = ColorTranslator.ToWin32(textColor);
poptions.dwFlags |= NativeMethods.DTT.TextColor;
// proceed to default implementation with modified poptions parameter
return(Unhandled);
}
