public unsafe DCMapping(Gdi32.HDC hDC, Rectangle bounds)
{
if (hDC.IsNull)
{
throw new ArgumentNullException(nameof(hDC));
}
bool success;
_dc = DeviceContext.FromHdc(hDC);
_dc.SaveHdc();
// Retrieve the x-coordinates and y-coordinates of the viewport origin for the specified device context.
success = Gdi32.GetViewportOrgEx(hDC, out Point viewportOrg).IsTrue();
Debug.Assert(success, "GetViewportOrgEx() failed.");
// Create a new rectangular clipping region based off of the bounds specified, shifted over by the x & y specified in the viewport origin.
var hClippingRegion = new Gdi32.RegionScope(
viewportOrg.X + bounds.Left,
viewportOrg.Y + bounds.Top,
viewportOrg.X + bounds.Right,
viewportOrg.Y + bounds.Bottom);
Debug.Assert(!hClippingRegion.IsNull, "CreateRectRgn() failed.");
try
{
var hOriginalClippingRegion = new Gdi32.RegionScope(hDC);
// Shift the viewpoint origint by coordinates specified in "bounds".
var lastViewPort = new Point();
success = Gdi32.SetViewportOrgEx(hDC, viewportOrg.X + bounds.Left, viewportOrg.Y + bounds.Top, &lastViewPort).IsTrue();
Debug.Assert(success, "SetViewportOrgEx() failed.");
RegionType originalRegionType;
if (!hOriginalClippingRegion.IsNull)
{
// Get the origninal clipping region so we can determine its type (we'll check later if we've restored the region back properly.)
RECT originalClipRect = new RECT();
originalRegionType = Gdi32.GetRgnBox(hOriginalClippingRegion, ref originalClipRect);
Debug.Assert(
originalRegionType != RegionType.ERROR,
"ERROR returned from SelectClipRgn while selecting the original clipping region..");
if (originalRegionType == RegionType.SIMPLEREGION)
{
// Find the intersection of our clipping region and the current clipping region (our parent's)
RegionType combineResult = Gdi32.CombineRgn(
hClippingRegion,
hClippingRegion,
hOriginalClippingRegion,
Gdi32.CombineMode.RGN_AND);
Debug.Assert(
(combineResult == RegionType.SIMPLEREGION) || (combineResult == RegionType.NULLREGION),
"SIMPLEREGION or NULLREGION expected.");
}
}
else
{
// If there was no clipping region, then the result is a simple region.
originalRegionType = RegionType.SIMPLEREGION;
}
// Select the new clipping region; make sure it's a SIMPLEREGION or NULLREGION
RegionType selectResult = Gdi32.SelectClipRgn((Gdi32.HDC)hDC, hClippingRegion);
Debug.Assert(
selectResult == RegionType.SIMPLEREGION || selectResult == RegionType.NULLREGION,
"SIMPLEREGION or NULLLREGION expected.");
}
catch (Exception ex) when(!ClientUtils.IsCriticalException(ex))
{
_dc.RestoreHdc();
_dc.Dispose();
}
}
public unsafe DCMapping(IntPtr hDC, Rectangle bounds)
{
if (hDC == IntPtr.Zero)
{
throw new ArgumentNullException(nameof(hDC));
}
bool success;
IntPtr hOriginalClippingRegion = IntPtr.Zero;
_translatedBounds = bounds;
_graphics = null;
_dc = DeviceContext.FromHdc(hDC);
_dc.SaveHdc();
// Retrieve the x-coordinates and y-coordinates of the viewport origin for the specified device context.
success = Gdi32.GetViewportOrgEx(hDC, out Point viewportOrg).IsTrue();
Debug.Assert(success, "GetViewportOrgEx() failed.");
// Create a new rectangular clipping region based off of the bounds specified, shifted over by the x & y specified in the viewport origin.
IntPtr hClippingRegion = Gdi32.CreateRectRgn(viewportOrg.X + bounds.Left, viewportOrg.Y + bounds.Top, viewportOrg.X + bounds.Right, viewportOrg.Y + bounds.Bottom);
Debug.Assert(hClippingRegion != IntPtr.Zero, "CreateRectRgn() failed.");
try
{
// Create an empty region oriented at 0,0 so we can populate it with the original clipping region of the hDC passed in.
hOriginalClippingRegion = Gdi32.CreateRectRgn(0, 0, 0, 0);
Debug.Assert(hOriginalClippingRegion != IntPtr.Zero, "CreateRectRgn() failed.");
// Get the clipping region from the hDC: result = {-1 = error, 0 = no region, 1 = success} per MSDN
int result = Gdi32.GetClipRgn(hDC, hOriginalClippingRegion);
Debug.Assert(result != -1, "GetClipRgn() failed.");
// Shift the viewpoint origint by coordinates specified in "bounds".
var lastViewPort = new Point();
success = Gdi32.SetViewportOrgEx(hDC, viewportOrg.X + bounds.Left, viewportOrg.Y + bounds.Top, &lastViewPort).IsTrue();
Debug.Assert(success, "SetViewportOrgEx() failed.");
RegionType originalRegionType;
if (result != 0)
{
// Get the origninal clipping region so we can determine its type (we'll check later if we've restored the region back properly.)
RECT originalClipRect = new RECT();
originalRegionType = Gdi32.GetRgnBox(hOriginalClippingRegion, ref originalClipRect);
Debug.Assert(originalRegionType != RegionType.ERROR, "ERROR returned from SelectClipRgn while selecting the original clipping region..");
if (originalRegionType == RegionType.SIMPLEREGION)
{
// Find the intersection of our clipping region and the current clipping region (our parent's)
// Returns a NULLREGION, the two didn't intersect.
// Returns a SIMPLEREGION, the two intersected
// Resulting region (stuff that was in hOriginalClippingRegion AND hClippingRegion is placed in hClippingRegion
RegionType combineResult = Gdi32.CombineRgn(hClippingRegion, hClippingRegion, hOriginalClippingRegion, Gdi32.CombineMode.RGN_AND);
Debug.Assert((combineResult == RegionType.SIMPLEREGION) ||
(combineResult == RegionType.NULLREGION),
"SIMPLEREGION or NULLREGION expected.");
}
}
else
{
// If there was no clipping region, then the result is a simple region.
// We don't need to keep track of the original now, since it is empty.
Gdi32.DeleteObject(hOriginalClippingRegion);
hOriginalClippingRegion = IntPtr.Zero;
originalRegionType = RegionType.SIMPLEREGION;
}
// Select the new clipping region; make sure it's a SIMPLEREGION or NULLREGION
RegionType selectResult = Gdi32.SelectClipRgn(hDC, hClippingRegion);
Debug.Assert((selectResult == RegionType.SIMPLEREGION ||
selectResult == RegionType.NULLREGION),
"SIMPLEREGION or NULLLREGION expected.");
}
catch (Exception ex) when(!ClientUtils.IsCriticalException(ex))
{
_dc.RestoreHdc();
_dc.Dispose();
}
finally
{
// Delete the new clipping region, as the clipping region for the HDC is now set
// to this rectangle. Hold on to hOriginalClippingRegion, as we'll need to restore
// it when this object is disposed.
success = Gdi32.DeleteObject(hClippingRegion).IsTrue();
Debug.Assert(success, "DeleteObject(hClippingRegion) failed.");
if (hOriginalClippingRegion != IntPtr.Zero)
{
success = Gdi32.DeleteObject(hOriginalClippingRegion).IsTrue();
Debug.Assert(success, "DeleteObject(hOriginalClippingRegion) failed.");
}
}
}
/// <include file='doc\Panel.uex' path='docs/doc[@for="Panel.StringFromBorderStyle"]/*' />
/// <devdoc>
/// </devdoc>
/// <internalonly/>
private static string StringFromBorderStyle(BorderStyle value)
{
Type borderStyleType = typeof(BorderStyle);
return((ClientUtils.IsEnumValid(value, (int)value, (int)BorderStyle.None, (int)BorderStyle.Fixed3D)) ? (borderStyleType.ToString() + "." + value.ToString()) : "[Invalid BorderStyle]");
}
public DCMapping(HandleRef hDC, Rectangle bounds)
{
if (hDC.Handle == IntPtr.Zero)
{
throw new ArgumentNullException("hDC");
}
bool success;
NativeMethods.POINT viewportOrg = new NativeMethods.POINT();
HandleRef hOriginalClippingRegion = NativeMethods.NullHandleRef;
NativeMethods.RegionFlags originalRegionType = NativeMethods.RegionFlags.NULLREGION;
this.translatedBounds = bounds;
this.graphics = null;
this.dc = DeviceContext.FromHdc(hDC.Handle);
this.dc.SaveHdc();
// Retrieve the x-coordinates and y-coordinates of the viewport origin for the specified device context.
success = SafeNativeMethods.GetViewportOrgEx(hDC, viewportOrg);
Debug.Assert(success, "GetViewportOrgEx() failed.");
// Create a new rectangular clipping region based off of the bounds specified, shifted over by the x & y specified in the viewport origin.
HandleRef hClippingRegion = new HandleRef(null, SafeNativeMethods.CreateRectRgn(viewportOrg.x + bounds.Left, viewportOrg.y + bounds.Top, viewportOrg.x + bounds.Right, viewportOrg.y + bounds.Bottom));
Debug.Assert(hClippingRegion.Handle != IntPtr.Zero, "CreateRectRgn() failed.");
try
{
// Create an empty region oriented at 0,0 so we can populate it with the original clipping region of the hDC passed in.
hOriginalClippingRegion = new HandleRef(this, SafeNativeMethods.CreateRectRgn(0, 0, 0, 0));
Debug.Assert(hOriginalClippingRegion.Handle != IntPtr.Zero, "CreateRectRgn() failed.");
// Get the clipping region from the hDC: result = {-1 = error, 0 = no region, 1 = success} per MSDN
int result = SafeNativeMethods.GetClipRgn(hDC, hOriginalClippingRegion);
Debug.Assert(result != -1, "GetClipRgn() failed.");
// Shift the viewpoint origint by coordinates specified in "bounds".
NativeMethods.POINT lastViewPort = new NativeMethods.POINT();
success = SafeNativeMethods.SetViewportOrgEx(hDC, viewportOrg.x + bounds.Left, viewportOrg.y + bounds.Top, lastViewPort);
Debug.Assert(success, "SetViewportOrgEx() failed.");
if (result != 0)
{
// Get the origninal clipping region so we can determine its type (we'll check later if we've restored the region back properly.)
NativeMethods.RECT originalClipRect = new NativeMethods.RECT();
originalRegionType = (NativeMethods.RegionFlags)SafeNativeMethods.GetRgnBox(hOriginalClippingRegion, ref originalClipRect);
Debug.Assert(originalRegionType != NativeMethods.RegionFlags.ERROR, "ERROR returned from SelectClipRgn while selecting the original clipping region..");
if (originalRegionType == NativeMethods.RegionFlags.SIMPLEREGION)
{
// Find the intersection of our clipping region and the current clipping region (our parent's)
// Returns a NULLREGION, the two didn't intersect.
// Returns a SIMPLEREGION, the two intersected
// Resulting region (stuff that was in hOriginalClippingRegion AND hClippingRegion is placed in hClippingRegion
NativeMethods.RegionFlags combineResult = (NativeMethods.RegionFlags)SafeNativeMethods.CombineRgn(hClippingRegion, hClippingRegion, hOriginalClippingRegion, NativeMethods.RGN_AND);
Debug.Assert((combineResult == NativeMethods.RegionFlags.SIMPLEREGION) ||
(combineResult == NativeMethods.RegionFlags.NULLREGION),
"SIMPLEREGION or NULLREGION expected.");
}
}
else
{
// If there was no clipping region, then the result is a simple region.
// We don't need to keep track of the original now, since it is empty.
SafeNativeMethods.DeleteObject(hOriginalClippingRegion);
hOriginalClippingRegion = new HandleRef(null, IntPtr.Zero);
originalRegionType = NativeMethods.RegionFlags.SIMPLEREGION;
}
// Select the new clipping region; make sure it's a SIMPLEREGION or NULLREGION
NativeMethods.RegionFlags selectResult = (NativeMethods.RegionFlags)SafeNativeMethods.SelectClipRgn(hDC, hClippingRegion);
Debug.Assert((selectResult == NativeMethods.RegionFlags.SIMPLEREGION ||
selectResult == NativeMethods.RegionFlags.NULLREGION),
"SIMPLEREGION or NULLLREGION expected.");
}
catch (Exception ex)
{
if (ClientUtils.IsSecurityOrCriticalException(ex))
{
throw;
}
this.dc.RestoreHdc();
this.dc.Dispose();
}
finally {
// Delete the new clipping region, as the clipping region for the HDC is now set
// to this rectangle. Hold on to hOriginalClippingRegion, as we'll need to restore
// it when this object is disposed.
success = SafeNativeMethods.DeleteObject(hClippingRegion);
Debug.Assert(success, "DeleteObject(hClippingRegion) failed.");
if (hOriginalClippingRegion.Handle != IntPtr.Zero)
{
success = SafeNativeMethods.DeleteObject(hOriginalClippingRegion);
Debug.Assert(success, "DeleteObject(hOriginalClippingRegion) failed.");
}
}
}
// IsValidTextImageRelation
// valid values are 0,1,2,4,8
// Method for verifying
// Verify that the number is between 0 and 8
// Verify that the bit that is on - thus forcing it to be a power of two.
//
public static bool IsValidTextImageRelation(TextImageRelation relation)
{
return(ClientUtils.IsEnumValid(relation, (int)relation, (int)TextImageRelation.Overlay, (int)TextImageRelation.TextBeforeImage, 1));
}
private static DialogResult ShowCore(IWin32Window owner, string text, string caption,
MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton,
MessageBoxOptions options, bool showHelp)
{
if (!ClientUtils.IsEnumValid(buttons, (int)buttons, (int)MessageBoxButtons.OK, (int)MessageBoxButtons.RetryCancel))
{
throw new InvalidEnumArgumentException(nameof(buttons), (int)buttons, typeof(MessageBoxButtons));
}
// valid values are 0x0 0x10 0x20 0x30 0x40, chop off the last 4 bits and check that it's between 0 and 4.
if (!WindowsFormsUtils.EnumValidator.IsEnumWithinShiftedRange(icon, /*numBitsToShift*/ 4, /*min*/ 0x0, /*max*/ 0x4))
{
throw new InvalidEnumArgumentException(nameof(icon), (int)icon, typeof(MessageBoxIcon));
}
// valid values are 0x0 0x100, 0x200, chop off the last 8 bits and check that it's between 0 and 2.
if (!WindowsFormsUtils.EnumValidator.IsEnumWithinShiftedRange(defaultButton, /*numBitsToShift*/ 8, /*min*/ 0x0, /*max*/ 0x2))
{
throw new InvalidEnumArgumentException(nameof(defaultButton), (int)defaultButton, typeof(DialogResult));
}
// options intentionally not verified because we don't expose all the options Win32 supports.
if (!SystemInformation.UserInteractive && (options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) == 0)
{
throw new InvalidOperationException(SR.CantShowModalOnNonInteractive);
}
if (owner != null && (options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) != 0)
{
throw new ArgumentException(SR.CantShowMBServiceWithOwner, nameof(options));
}
if (showHelp && (options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) != 0)
{
throw new ArgumentException(SR.CantShowMBServiceWithHelp, nameof(options));
}
MB style = (showHelp) ? MB.HELP : 0;
style |= (MB)buttons | (MB)icon | (MB)defaultButton | (MB)options;
IntPtr handle = IntPtr.Zero;
if (showHelp || ((options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) == 0))
{
if (owner is null)
{
handle = GetActiveWindow();
}
else
{
handle = Control.GetSafeHandle(owner);
}
}
IntPtr userCookie = IntPtr.Zero;
if (Application.UseVisualStyles)
{
// CLR4.0 or later, shell32.dll needs to be loaded explicitly.
if (Kernel32.GetModuleHandleW(Libraries.Shell32) == IntPtr.Zero)
{
if (Kernel32.LoadLibraryFromSystemPathIfAvailable(Libraries.Shell32) == IntPtr.Zero)
{
int lastWin32Error = Marshal.GetLastWin32Error();
throw new Win32Exception(lastWin32Error, string.Format(SR.LoadDLLError, Libraries.Shell32));
}
}
// Activate theming scope to get theming for controls at design time and when hosted in browser.
// NOTE: If a theming context is already active, this call is very fast, so shouldn't be a perf issue.
userCookie = ThemingScope.Activate(Application.UseVisualStyles);
}
Application.BeginModalMessageLoop();
DialogResult result;
try
{
result = Win32ToDialogResult(MessageBoxW(new HandleRef(owner, handle), text, caption, style));
}
finally
{
Application.EndModalMessageLoop();
ThemingScope.Deactivate(userCookie);
}
// Right after the dialog box is closed, Windows sends WM_SETFOCUS back to the previously active control
// but since we have disabled this thread main window the message is lost. So we have to send it again after
// we enable the main window.
User32.SendMessageW(new HandleRef(owner, handle), User32.WM.SETFOCUS);
return(result);
}
