protected unsafe override bool RunDialog(IntPtr hwndOwner)
{
var hookProcPtr = new User32.WNDPROCINT(HookProc);
var cc = new Comdlg32.CHOOSECOLORW
{
lStructSize = (uint)Marshal.SizeOf <Comdlg32.CHOOSECOLORW>()
};
IntPtr custColorPtr = Marshal.AllocCoTaskMem(64);
try
{
Marshal.Copy(_customColors, 0, custColorPtr, 16);
cc.hwndOwner = hwndOwner;
cc.hInstance = Instance;
cc.rgbResult = ColorTranslator.ToWin32(_color);
cc.lpCustColors = custColorPtr;
Comdlg32.CC flags = (Comdlg32.CC)Options | Comdlg32.CC.RGBINIT | Comdlg32.CC.ENABLEHOOK;
// Our docs say AllowFullOpen takes precedence over FullOpen; ChooseColor implements the opposite
if (!AllowFullOpen)
{
flags &= ~Comdlg32.CC.FULLOPEN;
}
cc.Flags = flags;
cc.lpfnHook = hookProcPtr;
if (!Comdlg32.ChooseColorW(ref cc).IsTrue())
{
return(false);
}
if (cc.rgbResult != ColorTranslator.ToWin32(_color))
{
_color = ColorTranslator.FromOle(cc.rgbResult);
}
Marshal.Copy(custColorPtr, _customColors, 0, 16);
return(true);
}
finally
{
Marshal.FreeCoTaskMem(custColorPtr);
}
}
private unsafe bool ShowPrintDialog(IntPtr hwndOwner)
{
PRINTDLGW data;
if (IntPtr.Size == 4)
{
data = new PRINTDLGW_32
{
lStructSize = (uint)sizeof(PRINTDLGW_32)
};
}
else
{
data = new PRINTDLGW_64
{
lStructSize = (uint)sizeof(PRINTDLGW_64)
};
}
data.nFromPage = 1;
data.nToPage = 1;
data.nMinPage = 0;
data.nMaxPage = 9999;
data.Flags = GetFlags();
data.nCopies = (ushort)PrinterSettings.Copies;
data.hwndOwner = hwndOwner;
User32.WNDPROCINT wndproc = new User32.WNDPROCINT(HookProc);
data.lpfnPrintHook = Marshal.GetFunctionPointerForDelegate(wndproc);
try
{
if (PageSettings is null)
{
data.hDevMode = PrinterSettings.GetHdevmode();
}
else
{
data.hDevMode = PrinterSettings.GetHdevmode(PageSettings);
}
data.hDevNames = PrinterSettings.GetHdevnames();
}
catch (InvalidPrinterException)
{
// Leave those fields null; Windows will fill them in
data.hDevMode = IntPtr.Zero;
data.hDevNames = IntPtr.Zero;
}
try
{
// Windows doesn't like it if page numbers are invalid
if (AllowSomePages)
{
if (PrinterSettings.FromPage < PrinterSettings.MinimumPage ||
PrinterSettings.FromPage > PrinterSettings.MaximumPage)
{
throw new ArgumentException(string.Format(SR.PDpageOutOfRange, "FromPage"));
}
if (PrinterSettings.ToPage < PrinterSettings.MinimumPage ||
PrinterSettings.ToPage > PrinterSettings.MaximumPage)
{
throw new ArgumentException(string.Format(SR.PDpageOutOfRange, "ToPage"));
}
if (PrinterSettings.ToPage < PrinterSettings.FromPage)
{
throw new ArgumentException(string.Format(SR.PDpageOutOfRange, "FromPage"));
}
data.nFromPage = (ushort)PrinterSettings.FromPage;
data.nToPage = (ushort)PrinterSettings.ToPage;
data.nMinPage = (ushort)PrinterSettings.MinimumPage;
data.nMaxPage = (ushort)PrinterSettings.MaximumPage;
}
if (PrintDlg(ref data).IsFalse())
{
var result = CommDlgExtendedError();
return(false);
}
UpdatePrinterSettings(data.hDevMode, data.hDevNames, (short)data.nCopies, data.Flags, settings, PageSettings);
PrintToFile = (data.Flags & PD.PRINTTOFILE) != 0;
PrinterSettings.PrintToFile = PrintToFile;
if (AllowSomePages)
{
PrinterSettings.FromPage = data.nFromPage;
PrinterSettings.ToPage = data.nToPage;
}
// When the flag PD_USEDEVMODECOPIESANDCOLLATE is not set,
// PRINTDLG.nCopies or PRINTDLG.nCopies indicates the number of copies the user wants
// to print, and the PD_COLLATE flag in the Flags member indicates
// whether the user wants to print them collated.
if ((data.Flags & PD.USEDEVMODECOPIESANDCOLLATE) == 0)
{
PrinterSettings.Copies = (short)data.nCopies;
PrinterSettings.Collate = (data.Flags & PD.COLLATE) == PD.COLLATE;
}
return(true);
}
finally
{
GC.KeepAlive(wndproc);
Kernel32.GlobalFree(data.hDevMode);
Kernel32.GlobalFree(data.hDevNames);
}
}
