public Font GetFont(IDeviceContext dc, FontProperty prop)
{
if( dc == null ){
throw new ArgumentNullException("dc");
}
//valid values are 0xa29 to 0xa29
if (!ClientUtils.IsEnumValid(prop, (int)prop, (int)FontProperty.GlyphFont, (int)FontProperty.GlyphFont))
{
throw new InvalidEnumArgumentException("prop", (int)prop, typeof(FontProperty));
}
NativeMethods.LOGFONT logfont = new NativeMethods.LOGFONT();
using( WindowsGraphicsWrapper wgr = new WindowsGraphicsWrapper( dc, AllGraphicsProperties ) ) {
HandleRef hdc = new HandleRef( wgr, wgr.WindowsGraphics.DeviceContext.Hdc );
lastHResult = SafeNativeMethods.GetThemeFont( new HandleRef( this, Handle ), hdc, part, state, (int) prop, logfont );
}
Font font = null;
//check for a failed HR.
if (NativeMethods.Succeeded(lastHResult)) {
// SECREVIEW: Safe to assert here, since the logfont comes from a native api and not from the
// caller of this method. The system creates the font handle.
//
IntSecurity.ObjectFromWin32Handle.Assert();
try {
font = Font.FromLogFont(logfont);
}
catch (Exception e) {
if (ClientUtils.IsSecurityOrCriticalException(e)) {
throw;
}
//Looks like the font was not true type
font = null;
}
}
return font;
}
private static NativeMethods.FONTDESC GetFONTDESCFromFont(Font font) {
NativeMethods.FONTDESC fdesc = null;
if (fontTable == null) {
fontTable = new Hashtable();
}
else {
fdesc = (NativeMethods.FONTDESC)fontTable[font];
}
if (fdesc == null) {
fdesc = new NativeMethods.FONTDESC();
fdesc.lpstrName = font.Name;
fdesc.cySize = (long)(font.SizeInPoints * 10000);
NativeMethods.LOGFONT logfont = new NativeMethods.LOGFONT();
font.ToLogFont(logfont);
fdesc.sWeight = (short) logfont.lfWeight;
fdesc.sCharset = logfont.lfCharSet;
fdesc.fItalic = font.Italic;
fdesc.fUnderline = font.Underline;
fdesc.fStrikethrough = font.Strikeout;
fontTable[font] = fdesc;
}
return fdesc;
}
/// <include file='doc\FontDialog.uex' path='docs/doc[@for="FontDialog.RunDialog"]/*' />
/// <internalonly/>
/// <devdoc>
/// <para>
/// The actual implementation of running the dialog. Inheriting classes
/// should override this if they want to add more functionality, and call
/// base.runDialog() if necessary
///
/// </para>
/// </devdoc>
protected override bool RunDialog(IntPtr hWndOwner) {
NativeMethods.WndProc hookProcPtr = new NativeMethods.WndProc(this.HookProc);
NativeMethods.CHOOSEFONT cf = new NativeMethods.CHOOSEFONT();
IntPtr screenDC = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef);
NativeMethods.LOGFONT lf = new NativeMethods.LOGFONT();
Graphics graphics = Graphics.FromHdcInternal(screenDC);
// SECREVIEW : The Font.ToLogFont method is marked with the 'unsafe' modifier cause it needs to write bytes into the logFont struct,
// here we are passing that struct so the assert is safe.
//
IntSecurity.ObjectFromWin32Handle.Assert();
try {
Font.ToLogFont(lf, graphics);
}
finally {
CodeAccessPermission.RevertAssert();
graphics.Dispose();
}
UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, screenDC));
IntPtr logFontPtr = IntPtr.Zero;
try {
logFontPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(NativeMethods.LOGFONT)));
Marshal.StructureToPtr(lf, logFontPtr, false);
cf.lStructSize = Marshal.SizeOf(typeof(NativeMethods.CHOOSEFONT));
cf.hwndOwner = hWndOwner;
cf.hDC = IntPtr.Zero;
cf.lpLogFont = logFontPtr;
cf.Flags = Options | NativeMethods.CF_INITTOLOGFONTSTRUCT | NativeMethods.CF_ENABLEHOOK;
if (minSize > 0 || maxSize > 0) {
cf.Flags |= NativeMethods.CF_LIMITSIZE;
}
//if ShowColor=true then try to draw the sample text in color,
//if ShowEffects=false then we will draw the sample text in standard control text color regardless.
//(limitation of windows control)
//
if (ShowColor || ShowEffects) {
cf.rgbColors = ColorTranslator.ToWin32(color);
}
else {
cf.rgbColors = ColorTranslator.ToWin32(SystemColors.ControlText);
}
cf.lpfnHook = hookProcPtr;
cf.hInstance = UnsafeNativeMethods.GetModuleHandle(null);
cf.nSizeMin = minSize;
if (maxSize == 0) {
cf.nSizeMax = Int32.MaxValue;
}
else {
cf.nSizeMax = maxSize;
}
Debug.Assert(cf.nSizeMin <= cf.nSizeMax, "min and max font sizes are the wrong way around");
if (!SafeNativeMethods.ChooseFont(cf)) return false;
NativeMethods.LOGFONT lfReturned = null;
lfReturned = (NativeMethods.LOGFONT)UnsafeNativeMethods.PtrToStructure(logFontPtr, typeof(NativeMethods.LOGFONT));
if (lfReturned.lfFaceName != null && lfReturned.lfFaceName.Length > 0) {
lf = lfReturned;
UpdateFont(lf);
UpdateColor(cf.rgbColors);
}
return true;
}
finally {
if (logFontPtr != IntPtr.Zero)
Marshal.FreeCoTaskMem(logFontPtr);
}
}
protected override IntPtr HookProc(IntPtr hWnd, int msg, IntPtr wparam, IntPtr lparam) {
switch (msg) {
case NativeMethods.WM_COMMAND:
if ((int)wparam == 0x402) {
NativeMethods.LOGFONT lf = new NativeMethods.LOGFONT();
UnsafeNativeMethods.SendMessage(new HandleRef(null, hWnd), NativeMethods.WM_CHOOSEFONT_GETLOGFONT, 0, lf);
UpdateFont(lf);
int index = (int)UnsafeNativeMethods.SendDlgItemMessage(new HandleRef(null, hWnd), 0x473, NativeMethods.CB_GETCURSEL, IntPtr.Zero, IntPtr.Zero);
if (index != NativeMethods.CB_ERR) {
UpdateColor((int)UnsafeNativeMethods.SendDlgItemMessage(new HandleRef(null, hWnd), 0x473,
NativeMethods.CB_GETITEMDATA, (IntPtr) index, IntPtr.Zero));
}
if (NativeWindow.WndProcShouldBeDebuggable) {
OnApply(EventArgs.Empty);
}
else {
try
{
OnApply(EventArgs.Empty);
}
catch (Exception e)
{
Application.OnThreadException(e);
}
}
}
break;
case NativeMethods.WM_INITDIALOG:
if (!showColor) {
IntPtr hWndCtl = UnsafeNativeMethods.GetDlgItem(new HandleRef(null, hWnd), NativeMethods.cmb4);
SafeNativeMethods.ShowWindow(new HandleRef(null, hWndCtl), NativeMethods.SW_HIDE);
hWndCtl = UnsafeNativeMethods.GetDlgItem(new HandleRef(null, hWnd), NativeMethods.stc4);
SafeNativeMethods.ShowWindow(new HandleRef(null, hWndCtl), NativeMethods.SW_HIDE);
}
break;
}
return base.HookProc(hWnd, msg, wparam, lparam);
}
// Returns whether or not target was changed
internal static bool FontToIFont(Font source, UnsafeNativeMethods.IFont target) {
bool changed = false;
// we need to go through all the pain of the diff here because
// it looks like setting them all has different results based on the
// order and each individual IFont implementor...
//
string fontName = target.GetName();
if (!source.Name.Equals(fontName)) {
target.SetName(source.Name);
changed = true;
}
// [....], Review: this always seems to come back as
// the point size * 10000 (HIMETRIC?), regardless
// or ratio or mapping mode, and despite what
// the documentation says...
//
// Either figure out what's going on here or
// do the process that the windows forms FONT object does here
// or, worse case, just create another Font object
// from the handle, but that's pretty heavy...
//
float fontSize = (float)target.GetSize() / 10000;
// size must be in points
float winformsSize = source.SizeInPoints;
if (winformsSize != fontSize) {
target.SetSize((long)(winformsSize * 10000));
changed = true;
}
NativeMethods.LOGFONT logfont = new NativeMethods.LOGFONT();
IntSecurity.ObjectFromWin32Handle.Assert();
try {
source.ToLogFont(logfont);
}
finally {
CodeAccessPermission.RevertAssert();
}
short fontWeight = target.GetWeight();
if (fontWeight != logfont.lfWeight) {
target.SetWeight((short)logfont.lfWeight);
changed = true;
}
bool fontBold = target.GetBold();
if (fontBold != (logfont.lfWeight >= 700)) {
target.SetBold(logfont.lfWeight >= 700);
changed = true;
}
bool fontItalic = target.GetItalic();
if (fontItalic != (0 != logfont.lfItalic)) {
target.SetItalic(0 != logfont.lfItalic);
changed = true;
}
bool fontUnderline = target.GetUnderline();
if (fontUnderline != (0 != logfont.lfUnderline)) {
target.SetUnderline(0 != logfont.lfUnderline);
changed = true;
}
bool fontStrike = target.GetStrikethrough();
if (fontStrike != (0 != logfont.lfStrikeOut)) {
target.SetStrikethrough(0 != logfont.lfStrikeOut);
changed = true;
}
short fontCharset = target.GetCharset();
if (fontCharset != logfont.lfCharSet) {
target.SetCharset(logfont.lfCharSet);
changed = true;
}
return changed;
}
private void SetCharFormatFont(bool selectionOnly, Font value) {
ForceHandleCreate();
NativeMethods.LOGFONT logfont = new NativeMethods.LOGFONT();
FontToLogFont(value, logfont);
byte[] bytesFaceName;
int dwMask = RichTextBoxConstants.CFM_FACE | RichTextBoxConstants.CFM_SIZE | RichTextBoxConstants.CFM_BOLD |
RichTextBoxConstants.CFM_ITALIC | RichTextBoxConstants.CFM_STRIKEOUT | RichTextBoxConstants.CFM_UNDERLINE |
RichTextBoxConstants.CFM_CHARSET;
int dwEffects = 0;
if (value.Bold) dwEffects |= RichTextBoxConstants.CFE_BOLD;
if (value.Italic) dwEffects |= RichTextBoxConstants.CFE_ITALIC;
if (value.Strikeout) dwEffects |= RichTextBoxConstants.CFE_STRIKEOUT;
if (value.Underline) dwEffects |= RichTextBoxConstants.CFE_UNDERLINE;
if (Marshal.SystemDefaultCharSize == 1)
{
bytesFaceName = Encoding.Default.GetBytes(logfont.lfFaceName);
NativeMethods.CHARFORMATA cfA = new NativeMethods.CHARFORMATA();
for (int i=0; i<bytesFaceName.Length; i++) cfA.szFaceName[i] = bytesFaceName[i];
cfA.dwMask = dwMask;
cfA.dwEffects = dwEffects;
cfA.yHeight = (int) (value.SizeInPoints * 20);
cfA.bCharSet = logfont.lfCharSet;
cfA.bPitchAndFamily = logfont.lfPitchAndFamily;
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), RichTextBoxConstants.EM_SETCHARFORMAT, selectionOnly ? RichTextBoxConstants.SCF_SELECTION : RichTextBoxConstants.SCF_ALL, cfA);
}
else
{
bytesFaceName = Encoding.Unicode.GetBytes(logfont.lfFaceName);
NativeMethods.CHARFORMATW cfW = new NativeMethods.CHARFORMATW();
for (int i=0; i<bytesFaceName.Length; i++) cfW.szFaceName[i] = bytesFaceName[i];
cfW.dwMask = dwMask;
cfW.dwEffects = dwEffects;
cfW.yHeight = (int) (value.SizeInPoints * 20);
cfW.bCharSet = logfont.lfCharSet;
cfW.bPitchAndFamily = logfont.lfPitchAndFamily;
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), RichTextBoxConstants.EM_SETCHARFORMAT, selectionOnly ? RichTextBoxConstants.SCF_SELECTION : RichTextBoxConstants.SCF_ALL, cfW);
}
}
