Printing: Try to duplex print with manual dialog

2026-08-11 18:09:51 +02:00
parent 470c6e09e5
commit 07b197958d
1 changed files with 7 additions and 5 deletions
@@ -163,15 +163,17 @@ namespace Elwig.Helpers.Printing {

            public bool TrySetDuplex(Duplexing duplex) {
                var devMode = Marshal.PtrToStructure<DEVMODE>(_devMode);
+                switch (duplex) {
+                    case Duplexing.OneSided: devMode.dmDuplex = DMDUP_SIMPLEX; break;
+                    case Duplexing.TwoSidedShortEdge: devMode.dmDuplex = DMDUP_HORIZONTAL; break;
+                    case Duplexing.TwoSidedLongEdge: devMode.dmDuplex = DMDUP_VERTICAL; break;
+                }
                if ((devMode.dmFields & DM_DUPLEX) != 0) {
-                    switch (duplex) {
-                        case Duplexing.OneSided: devMode.dmDuplex = DMDUP_SIMPLEX; break;
-                        case Duplexing.TwoSidedShortEdge: devMode.dmDuplex = DMDUP_HORIZONTAL; break;
-                        case Duplexing.TwoSidedLongEdge: devMode.dmDuplex = DMDUP_VERTICAL; break;
-                    }
                    Marshal.StructureToPtr(devMode, _devMode, false);
                    return true;
                } else {
+                    devMode.dmFields |= DM_DUPLEX;
+                    Marshal.StructureToPtr(devMode, _devMode, false);
                    return false;
                }
            }