Fixed handling of AltGr from Windows' touch keyboard

We need to test this always in order to catch Ctrl+AltGr, and to
handle release of the key properly. Hopefully there isn't any other
case where VK_MENU is sent without a scan code.

diff --git a/vncviewer/Viewport.cxx b/vncviewer/Viewport.cxx
index 165560cb2e3c2f71afa4bd455bce86e6e9c10a0c..18ed69e759cda4f7cb77356ec51e7aed9ba84fd6 100644 (file)
--- a/vncviewer/Viewport.cxx
+++ b/vncviewer/Viewport.cxx
@@ -936,6 +936,13 @@ int Viewport::handleSystemEvent(void *event, void *data)
 
     keyCode = ((msg->lParam >> 16) & 0xff);
 
+    // Windows' touch keyboard doesn't set a scan code for the Alt
+    // portion of the AltGr sequence, so we need to help it out
+    if (!isExtended && (keyCode == 0x00) && (vKey == VK_MENU)) {
+      isExtended = true;
+      keyCode = 0x38;
+    }
+
     // Windows doesn't have a proper AltGr, but handles it using fake
     // Ctrl+Alt. However the remote end might not be Windows, so we need
     // to merge those in to a single AltGr event. We detect this case
@@ -945,13 +952,6 @@ int Viewport::handleSystemEvent(void *event, void *data)
       self->altGrArmed = false;
       Fl::remove_timeout(handleAltGrTimeout);
 
-      // Windows' touch keyboard doesn't set a scan code for the Alt
-      // portion of the AltGr sequence, so we need to help it out
-      if (!isExtended && (keyCode == 0x00)) {
-        isExtended = true;
-        keyCode = 0x38;
-      }
-
       if (isExtended && (keyCode == 0x38) && (vKey == VK_MENU) &&
           ((msg->time - self->altGrCtrlTime) < 50)) {
         // Alt seen, so this is an AltGr sequence
@@ -1047,6 +1047,12 @@ int Viewport::handleSystemEvent(void *event, void *data)
 
     keyCode = ((msg->lParam >> 16) & 0xff);
 
+    // Touch keyboard AltGr (see above)
+    if (!isExtended && (keyCode == 0x00) && (vKey == VK_MENU)) {
+      isExtended = true;
+      keyCode = 0x38;
+    }
+
     // We can't get a release in the middle of an AltGr sequence, so
     // abort that detection
     if (self->altGrArmed) {