Dim loader buttons while installing

src/main.cpp

@@ -18,6 +18,12 @@ const DWORD CLR_BORDER = 0xBFC9D6;
 const DWORD CLR_HOVER = 0xE4EEFF;
 const DWORD CLR_PRESS = 0xCFE0FF;
 const DWORD CLR_TEXT = 0x14202E;
+const DWORD CLR_BUSY_BG = 0xE9ECF1;
+const DWORD CLR_BUSY_BORDER = 0xD5DAE2;
+const DWORD CLR_BUSY_TEXT = 0xA7AEBA;
+const DWORD CLR_ACTIVE_BG = 0xD8E4F8;
+const DWORD CLR_ACTIVE_BORDER = 0x9BB8E8;
+const DWORD CLR_ACTIVE_TEXT = 0x2E4A78;
 
 const wchar_t* kButtonNames[7] = {
     L"XorBoot", L"Bootmgr", L"Grub4Dos", L"Grub2",
@@ -239,11 +245,25 @@ void App::Paint(HDC dc)
         int bw = kButtonPos[i][2];
         int bh = kButtonPos[i][3];
 
-        FillRectColor(memory, x - 1, y - 1, bw + 2, bh + 2,
-                      ColorFromHex(CLR_BORDER));
-        FillRectColor(memory, x, y, bw, bh, buttonBg[i]);
+        COLORREF background = buttonBg[i];
+        COLORREF border = ColorFromHex(CLR_BORDER);
+        COLORREF text = ColorFromHex(CLR_TEXT);
+        if (busy) {
+            if (i == activeButton) {
+                background = ColorFromHex(CLR_ACTIVE_BG);
+                border = ColorFromHex(CLR_ACTIVE_BORDER);
+                text = ColorFromHex(CLR_ACTIVE_TEXT);
+            } else {
+                background = ColorFromHex(CLR_BUSY_BG);
+                border = ColorFromHex(CLR_BUSY_BORDER);
+                text = ColorFromHex(CLR_BUSY_TEXT);
+            }
+        }
+
+        FillRectColor(memory, x - 1, y - 1, bw + 2, bh + 2, border);
+        FillRectColor(memory, x, y, bw, bh, background);
         DrawTextRect(memory, kButtonNames[i], fontButton, x, y, bw, bh,
-                     ColorFromHex(CLR_TEXT), DT_CENTER | DT_VCENTER);
+                     text, DT_CENTER | DT_VCENTER);
     }
 
     BitBlt(dc, 0, 0, w, h, memory, 0, 0, SRCCOPY);
@@ -265,6 +285,18 @@ void App::OnPoll()
     ScreenToClient(hwnd, &client);
     HitResult hit = HitTest(client);
 
+    if (busy) {
+        downButton = -1;
+        for (int i = 0; i < 7; ++i) {
+            buttonBg[i] = (i == activeButton) ? ColorFromHex(CLR_ACTIVE_BG)
+                                              : ColorFromHex(CLR_BUSY_BG);
+        }
+        minBg = ColorFromHex(CLR_HEAD);
+        closeBg = ColorFromHex(CLR_HEAD);
+        InvalidateRect(hwnd, nullptr, FALSE);
+        return;
+    }
+
     COLORREF minColor = ColorFromHex(CLR_HEAD);
     COLORREF closeColor = ColorFromHex(CLR_HEAD);
     if (hit.kind == HitKind::Min) {
@@ -324,12 +356,6 @@ void App::OnPoll()
         buttonBg[i] = background;
     }
 
-    if (busy) {
-        downButton = -1;
-        InvalidateRect(hwnd, nullptr, FALSE);
-        return;
-    }
-
     if (leftDown) {
         if (hit.kind == HitKind::Button) {
             downButton = hit.index;