fix alt+tab behavior and improve keys mapping on windows

data/layout.xml

@@ -1566,7 +1566,8 @@ Here's a list of what's available in this release.
           <text text="About"/>
         </button-custom>
         <!--<button id="btn-anim" width="70" height="100%" margin="1 0 0 10" text="Animate"/>-->
-        <node dir="row" margin="0 0 0 50">
+        
+        <node dir="row" margin="0 0 0 0" grow="1" justify="center">
           <!--panel togglers-->
           <button-custom id="btn-stroke" width="50" height="50" margin="0 5 0 0" thickness="1" border-color=".1" pad="2">
             <image path="data/ui/stroke.png" width="100%" height="100%" align="center" justify="flex-end"/>
@@ -1588,6 +1589,13 @@ Here's a list of what's available in this release.
             <image path="data/ui/grid.png" width="100%" height="100%" align="center" justify="flex-end" mips="true"/>
           </button-custom>
         </node>
+        
+        <button-custom id="btn-undo" width="50" height="100%" margin="0 5 0 0" thickness="1" border-color="0 0 0 1" pad="2">
+          <image path="data/ui/undo.png" width="100%" height="100%" align="center" justify="flex-end"/>
+        </button-custom>
+        <button-custom id="btn-redo" width="50" height="100%" margin="0 5 0 0" thickness="1" border-color="0 0 0 1" pad="2">
+          <image path="data/ui/redo.png" width="100%" height="100%" align="center" justify="flex-end"/>
+        </button-custom>
         <!--
         <button-custom id="btn-layer" width="50" height="100%" margin="0 5 0 0" thickness="1" border-color="0 0 0 1" pad="6" align="center" justify="center">
           <icon width="100%" height="100%" icon="disk"/>
@@ -1632,12 +1640,6 @@ Here's a list of what's available in this release.
               <image path="data/ui/notouch.png" width="100%" height="100%" align="center" justify="flex-end"/>
             </button-custom>
             
-            <button-custom id="btn-undo" width="40" height="40" margin="46 0 2 5" thickness="1" border-color="0 0 0 1" pad="2">
-              <image path="data/ui/undo.png" width="100%" height="100%" align="center" justify="flex-end"/>
-            </button-custom>
-            <button-custom id="btn-redo" width="40" height="40" margin="2 0 2 5" thickness="1" border-color="0 0 0 1" pad="2">
-              <image path="data/ui/redo.png" width="100%" height="100%" align="center" justify="flex-end"/>
-            </button-custom>
           </node>
         </border>
         

src/main.cpp

@@ -28,6 +28,7 @@ bool      keys[256];
 std::mutex gl_mutex;
 std::mutex async_mutex;
 std::thread::id gl_thread;
+std::map<kKey, int> vkey_map;
 
 std::thread hmd_renderer;
 std::thread renderer;
@@ -406,6 +407,29 @@ static void SetupExceptionHandler()
     }, 0);
 }
 
+// create a reverse map from kKey to VK_XXX
+void init_vk_map()
+{
+    for (int k = 1; k < 256; k++) // ignore kKey::Unknown = 0
+    {
+        for (int vk = 0; vk < 256; vk++)
+        {
+            if (k == (int)convert_key(k))
+            {
+                if (vkey_map.find((kKey)k) == vkey_map.end())
+                {
+                    vkey_map.insert({ (kKey)k, vk });
+                }
+                else
+                {
+                    LOG("KEY MAP COLLISION %d and %d maps to", 
+                        (int)vk, (int)vkey_map[(kKey)k], (int)k);
+                }
+            }
+        }
+    }
+}
+
 int main(int argc, char** argv)
 {
     WNDCLASS wc;
@@ -416,6 +440,7 @@ int main(int argc, char** argv)
     if (argc == 1)
         App::I.initLog();
 
+    init_vk_map();
 /*
     if (!App::I.check_license())
     {
@@ -863,31 +888,20 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
         tasklist.emplace_back([=] {
             int active = GET_WM_ACTIVATE_STATE(wp, lp);
             WacomTablet::I.set_focus(active);
-            for (int k = 0; k < 256; k++)
+            static BYTE keys[256];
+            if (GetKeyboardState(keys))
             {
-                if (App::I.keys[k])
+                bool alt = keys[VK_TAB] & 0x80;
+                for (auto k : vkey_map)
                 {
-                    for (int i = 0; i < 256; i++)
+                    // ignore alt + tab
-                    {
+                    if (alt && k.first == kKey::KeyAlt)
-                        if ((int)convert_key(i) == k)
+                        continue;
-                        {
+                    bool down = keys[k.second] & 0x80;
-                            bool down = GetKeyState(i) & 0x8000;
+                    if (App::I.keys[(int)k.first] && !down)
-                            if (!down)
+                        App::I.key_up(k.first);
-                                App::I.key_up((kKey)k);
+                    else if(!App::I.keys[(int)k.first] && down)
-                        }
+                        App::I.key_down(k.first);
-                    }
-                }
-                else
-                {
-                    for (int i = 0; i < 256; i++)
-                    {
-                        if ((int)convert_key(i) == k)
-                        {
-                            bool down = GetKeyState(i) & 0x8000;
-                            if (down)
-                                App::I.key_down((kKey)k);
-                        }
-                    }
                 }
             }
         });
@@ -913,9 +927,9 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
     }
     case WM_SYSKEYDOWN:
     case WM_KEYDOWN:
-        if ((lp >> 30 & 1) == 0) // ignore repeated
+        if ((lp >> 30 & 1) == 0 &&  // ignore repeated
+            !(wp == VK_TAB && App::I.keys[(int)kKey::KeyAlt])) // ignore alt+tab
         {
-
             std::lock_guard<std::mutex> lock(task_mutex);
             tasklist.emplace_back([wp] {
                 App::I.key_down(convert_key((int)wp));
@@ -924,6 +938,7 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
         break;
     case WM_SYSKEYUP:
     case WM_KEYUP:
+        if (!(wp == VK_TAB && App::I.keys[(int)kKey::KeyAlt])) // ignore alt+tab
         {
             std::lock_guard<std::mutex> lock(task_mutex);
             tasklist.emplace_back([wp] {