public IntNativeMethods.TEXTMETRIC GetTextMetrics()
{
IntNativeMethods.TEXTMETRIC lptm = new IntNativeMethods.TEXTMETRIC();
HandleRef hDC = new HandleRef(this.dc, this.dc.Hdc);
bool flag = this.dc.MapMode != DeviceContextMapMode.Text;
if (flag)
{
this.dc.SaveHdc();
}
try
{
if (flag)
{
DeviceContextMapMode mode = this.dc.SetMapMode(DeviceContextMapMode.Text);
}
IntUnsafeNativeMethods.GetTextMetrics(hDC, ref lptm);
}
finally
{
if (flag)
{
this.dc.RestoreHdc();
}
}
return(lptm);
}
/// <summary>
/// Returns a TEXTMETRIC structure for the font selected in the device context
/// represented by this object, in units of pixels.
/// </summary>
public Gdi32.TEXTMETRICW GetTextMetrics()
{
var tm = new Gdi32.TEXTMETRICW();
HandleRef hdc = new HandleRef(DeviceContext, DeviceContext.Hdc);
// Set the mapping mode to MM_TEXT so we deal with units of pixels.
DeviceContextMapMode mapMode = DeviceContext.MapMode;
bool setupDC = mapMode != DeviceContextMapMode.Text;
if (setupDC)
{
// Changing the MapMode will affect viewport and window extent and origin, we save the dc
// state so all those properties can be properly restored once done.
DeviceContext.SaveHdc();
}
try
{
if (setupDC)
{
mapMode = DeviceContext.SetMapMode(DeviceContextMapMode.Text);
}
Gdi32.GetTextMetricsW(hdc, ref tm);
}
finally
{
if (setupDC)
{
DeviceContext.RestoreHdc();
}
}
return(tm);
}
/// <summary>
/// Returns a TEXTMETRIC structure for the font selected in the device context
/// represented by this object, in units of pixels.
/// </summary>
public IntNativeMethods.TEXTMETRIC GetTextMetrics()
{
IntNativeMethods.TEXTMETRIC tm = new IntNativeMethods.TEXTMETRIC();
HandleRef hdc = new HandleRef(dc, dc.Hdc);
// Set the mapping mode to MM_TEXT so we deal with units of pixels.
DeviceContextMapMode mapMode = dc.MapMode;
bool setupDC = mapMode != DeviceContextMapMode.Text;
if (setupDC)
{
// Changing the MapMode will affect viewport and window extent and origin, we save the dc
// state so all those properties can be properly restored once done.
dc.SaveHdc();
}
try
{
if (setupDC)
{
mapMode = dc.SetMapMode(DeviceContextMapMode.Text);
}
IntUnsafeNativeMethods.GetTextMetrics(hdc, ref tm);
}
finally
{
if (setupDC)
{
dc.RestoreHdc();
}
}
return(tm);
}
/// <devdoc>
/// Sets the DC map mode and returns the old value.
/// </devdoc>
public DeviceContextMapMode SetMapMode(DeviceContextMapMode newMode)
{
return((DeviceContextMapMode)IntUnsafeNativeMethods.SetMapMode(new HandleRef(this, this.Hdc), (int)newMode));
}
public DeviceContextMapMode SetMapMode(DeviceContextMapMode newMode)
{
return (DeviceContextMapMode) IntUnsafeNativeMethods.SetMapMode(new HandleRef(this, this.Hdc), (int) newMode);
}
void RestoreMirrorDC() {
if (parent.IsMirrored && mirrordc != null) {
mirrordc.ViewportExtent = mirrordcExtent;
mirrordc.ViewportOrigin = mirrordcOrigin;
mirrordc.SetMapMode(mirrordcMode);
mirrordc.RestoreHdc();
mirrordc.Dispose();
}
mirrordc= null;
mirrordcExtent = Size.Empty;
mirrordcOrigin = Point.Empty;
mirrordcMode = DeviceContextMapMode.Text;
}
/// <devdoc>
///
/// VSWhidbey #455702.
///
/// Since we added mirroring to certain controls, we need to make sure the
/// error icons show up in the correct place. We cannot mirror the errorwindow
/// in EnsureCreated (although that would have been really easy), since we use
/// GDI+ for some of this code, and as we all know, GDI+ does not handle mirroring
/// at all.
///
/// To work around that we create our own mirrored dc when we need to.
///
/// </devdoc>
void CreateMirrorDC(IntPtr hdc, int originOffset) {
Debug.Assert(mirrordc == null, "Why is mirrordc non-null? Did you not call RestoreMirrorDC?");
mirrordc = DeviceContext.FromHdc(hdc);
if (parent.IsMirrored && mirrordc != null) {
mirrordc.SaveHdc();
mirrordcExtent = mirrordc.ViewportExtent;
mirrordcOrigin = mirrordc.ViewportOrigin;
mirrordcMode = mirrordc.SetMapMode(DeviceContextMapMode.Anisotropic);
mirrordc.ViewportExtent = new Size(-(mirrordcExtent.Width), mirrordcExtent.Height);
mirrordc.ViewportOrigin = new Point(mirrordcOrigin.X + originOffset, mirrordcOrigin.Y);
}
}
private void CreateMirrorDC(IntPtr hdc, int originOffset)
{
this.mirrordc = DeviceContext.FromHdc(hdc);
if (this.parent.IsMirrored && (this.mirrordc != null))
{
this.mirrordc.SaveHdc();
this.mirrordcExtent = this.mirrordc.ViewportExtent;
this.mirrordcOrigin = this.mirrordc.ViewportOrigin;
this.mirrordcMode = this.mirrordc.SetMapMode(DeviceContextMapMode.Anisotropic);
this.mirrordc.ViewportExtent = new Size(-this.mirrordcExtent.Width, this.mirrordcExtent.Height);
this.mirrordc.ViewportOrigin = new Point(this.mirrordcOrigin.X + originOffset, this.mirrordcOrigin.Y);
}
}
private void RestoreMirrorDC()
{
if (this.parent.IsMirrored && (this.mirrordc != null))
{
this.mirrordc.ViewportExtent = this.mirrordcExtent;
this.mirrordc.ViewportOrigin = this.mirrordcOrigin;
this.mirrordc.SetMapMode(this.mirrordcMode);
this.mirrordc.RestoreHdc();
this.mirrordc.Dispose();
}
this.mirrordc = null;
this.mirrordcExtent = Size.Empty;
this.mirrordcOrigin = Point.Empty;
this.mirrordcMode = DeviceContextMapMode.Text;
}
