コード例 #1
0
        public void ParkingWindow_SystemAware()
        {
            // run tests only on Windows 10 versions that support thread dpi awareness.
            if (!PlatformDetection.IsWindows10Version1803OrGreater)
            {
                return;
            }

            // set thread awareness context to PermonitorV2(PMv2).
            // if process/thread is not in PMv2, calling 'EnterDpiAwarenessScope' is a no-op and that is by design.
            // In this case, we will be setting thread to PMv2 mode and then scope to UNAWARE
            IntPtr originalAwarenessContext = User32.SetThreadDpiAwarenessContext(User32.DPI_AWARENESS_CONTEXT.PER_MONITOR_AWARE_V2);

            try
            {
                using (DpiHelper.EnterDpiAwarenessScope(User32.DPI_AWARENESS_CONTEXT.SYSTEM_AWARE))
                {
                    using var control = new Control();
                    ThreadContext ctx = GetContextForHandle(new HandleRef(this, control.Handle));
                    Assert.NotNull(ctx);
                    ParkingWindow parkingWindow = ctx.GetParkingWindowForContext(User32.DPI_AWARENESS_CONTEXT.SYSTEM_AWARE);
                    Assert.NotNull(parkingWindow);

                    IntPtr dpiContext = User32.GetWindowDpiAwarenessContext(parkingWindow.Handle);
                    Assert.True(User32.AreDpiAwarenessContextsEqual(User32.DPI_AWARENESS_CONTEXT.SYSTEM_AWARE, dpiContext));
                }
            }
            finally
            {
                // reset back to original awareness context.
                User32.SetThreadDpiAwarenessContext(originalAwarenessContext);
            }
        }
コード例 #2
0
ファイル: DpiHelper.cs プロジェクト: silvrwolfboy/winforms
        /// <summary>
        ///  Gets the DPI awareness.
        /// </summary>
        /// <returns>The thread's/process' current HighDpi mode</returns>
        internal static HighDpiMode GetWinformsApplicationDpiAwareness()
        {
            // For Windows 10 RS2 and above
            if (OsVersion.IsWindows10_1607OrGreater)
            {
                IntPtr dpiAwareness = User32.GetThreadDpiAwarenessContext();

                if (User32.AreDpiAwarenessContextsEqual(dpiAwareness, User32.DPI_AWARENESS_CONTEXT.SYSTEM_AWARE))
                {
                    return(HighDpiMode.SystemAware);
                }

                if (User32.AreDpiAwarenessContextsEqual(dpiAwareness, User32.DPI_AWARENESS_CONTEXT.UNAWARE))
                {
                    return(HighDpiMode.DpiUnaware);
                }

                if (User32.AreDpiAwarenessContextsEqual(dpiAwareness, User32.DPI_AWARENESS_CONTEXT.PER_MONITOR_AWARE_V2))
                {
                    return(HighDpiMode.PerMonitorV2);
                }

                if (User32.AreDpiAwarenessContextsEqual(dpiAwareness, User32.DPI_AWARENESS_CONTEXT.PER_MONITOR_AWARE))
                {
                    return(HighDpiMode.PerMonitor);
                }

                if (User32.AreDpiAwarenessContextsEqual(dpiAwareness, User32.DPI_AWARENESS_CONTEXT.UNAWARE_GDISCALED))
                {
                    return(HighDpiMode.DpiUnawareGdiScaled);
                }
            }
            else if (OsVersion.IsWindows8_1OrGreater)
            {
                SHCore.GetProcessDpiAwareness(IntPtr.Zero, out SHCore.PROCESS_DPI_AWARENESS processDpiAwareness);
                switch (processDpiAwareness)
                {
                case SHCore.PROCESS_DPI_AWARENESS.UNAWARE:
                    return(HighDpiMode.DpiUnaware);

                case SHCore.PROCESS_DPI_AWARENESS.SYSTEM_AWARE:
                    return(HighDpiMode.SystemAware);

                case SHCore.PROCESS_DPI_AWARENESS.PER_MONITOR_AWARE:
                    return(HighDpiMode.PerMonitor);
                }
            }
            else
            {
                // Available on Vista and higher
                return(User32.IsProcessDPIAware().IsTrue() ? HighDpiMode.SystemAware : HighDpiMode.DpiUnaware);
            }

            // We should never get here, except someone ported this with force to < Windows 7.
            return(HighDpiMode.DpiUnaware);
        }
コード例 #3
0
        /// <summary>
        /// Tries to compare two DPIawareness context values. Return true if they were equal.
        /// Return false when they are not equal or underlying OS does not support this API.
        /// </summary>
        /// <returns>true/false</returns>
        public static bool TryFindDpiAwarenessContextsEqual(DpiAwarenessContext?dpiContextA, DpiAwarenessContext?dpiContextB)
        {
            if (dpiContextA == null)
            {
                return(dpiContextB == null);  // true if both null but not either
            }
            else if (dpiContextB == null)
            {
                return(false); // because we know A is not null
            }

            if (AreDpiAwarenessContextsEqualIsAvailable())
            {
                return(User32.AreDpiAwarenessContextsEqual((DpiAwarenessContext)dpiContextA, (DpiAwarenessContext)dpiContextB));
            }

            // legacy OS that does not have this API available.
            return(false);
        }