fix(ui): B never quits (Steam sends Esc for it), Ctrl+Q does; started from Steam, the hints show the Steam Controller's buttons

ui/qml/AppState.qml

@@ -215,7 +215,9 @@ Item {
                 boot = a === "left" ? "gamescope" : "desktop";
             else if (a === "apply") goReview(false);
             else if (a === "reapply") goReview(true);
-            else if (a === "back") Qt.quit();
+            // B/Esc/Back don't quit: Steam's desktop layout sends Esc for a
+            // Steam Controller's B, which should only ever go back.
+            else if (a === "quit") Qt.quit();
         } else if (screen === "review") {
             if (a === "accept" || a === "apply") onApplyPressed();
             else if (a === "back") { reapply = false; screen = "menu"; }
@@ -254,7 +256,7 @@ Item {
         if (screen === "bios2" && Input.type !== "keyboard" && (e.key === Qt.Key_Return || e.key === Qt.Key_Enter)) {
             if (!e.isAutoRepeat) act("hold"); e.accepted = true; return;
         }
-        if (!fromRemote) Input.type = "keyboard";
+        if (!fromRemote) Input.type = Input.fromSteam ? "steam" : "keyboard";
         var k = e.key;
         if (k === Qt.Key_Up) act("up");
         else if (k === Qt.Key_Down) act("down");
@@ -268,6 +270,7 @@ Item {
         else if (k === Qt.Key_Return || k === Qt.Key_Enter) act("accept");
         else if (k === Qt.Key_Escape || k === Qt.Key_Back || k === Qt.Key_Backspace) { if (!e.isAutoRepeat) act("back"); }
         else if (k === Qt.Key_R) act("reapply");
+        else if (k === Qt.Key_Q && (e.modifiers & Qt.ControlModifier)) act("quit");
         else return;
         e.accepted = true;
     }

ui/qml/Glyph.qml

@@ -6,7 +6,7 @@ Rectangle {
     property string k
     property bool dark: false
     height: 26; width: Math.max(26, gt.implicitWidth + 14)
-    radius: Input.type === "controller" && k.length === 1 ? 13 : 7
+    radius: (Input.type === "controller" || Input.type === "steam") && k.length === 1 ? 13 : 7
     color: dark ? Theme.ink : Theme.key
     Text { id: gt; anchors.centerIn: parent; text: glyph.k; color: glyph.dark ? Theme.accent : Theme.textHi
            font.family: Theme.body; font.pixelSize: 12; font.weight: Font.DemiBold }

ui/qml/Input.qml

@@ -5,10 +5,15 @@ import QtQuick
 
 QtObject {
     property string type: "keyboard"
+    // Started from Steam: keys come from a Steam Controller through Steam's
+    // desktop layout (A = Enter, B = Esc, Y = Space, X = Steam's keyboard),
+    // shown as "steam" with the controller's buttons.
+    property bool fromSteam: false
     readonly property var glyphs: ({
-        controller: { toggle: "A", choose: "◀ ▶", reapply: "Y", quit: "B", apply: "X", ok: "A", back: "B" },
-        keyboard: { toggle: "Enter", choose: "← →", reapply: "R", quit: "Esc", apply: "Ctrl+Enter", ok: "Enter", back: "Esc" },
-        remote: { toggle: "OK", choose: "◀ ▶", reapply: "Red", quit: "Back", apply: "↓ Apply", ok: "OK", back: "Back" }
+        controller: { toggle: "A", choose: "◀ ▶", reapply: "Y", quit: "", apply: "X", ok: "A", back: "B" },
+        keyboard: { toggle: "Enter", choose: "← →", reapply: "R", quit: "Ctrl+Q", apply: "Ctrl+Enter", ok: "Enter", back: "Esc" },
+        steam: { toggle: "A", choose: "◀ ▶", reapply: "", quit: "", apply: "↓ A", ok: "A", back: "B" },
+        remote: { toggle: "OK", choose: "◀ ▶", reapply: "Red", quit: "", apply: "↓ Apply", ok: "OK", back: "Back" }
     })
     readonly property var g: glyphs[type]
 }

ui/qml/Main.qml

@@ -12,6 +12,8 @@ ApplicationWindow {
     required property var gamepad
     required property bool fullscreen
     required property string iconUrl
+    required property bool fromSteam
+    Component.onCompleted: Input.fromSteam = fromSteam
 
     width: 1280; height: 720
     minimumWidth: 960; minimumHeight: 540

ui/qml/MenuScreen.qml

@@ -59,7 +59,10 @@ Item {
         Row {
             anchors.left: parent.left; anchors.leftMargin: 40; anchors.verticalCenter: parent.verticalCenter; spacing: 28
             Repeater {
+                // Quit only has a key on a keyboard (Ctrl+Q), and re-apply has
+                // none through Steam's layout; a controller quits through Steam.
                 model: [[screen.g.toggle, "Toggle"], [screen.g.choose, "Choose"], [screen.g.reapply, "Re-apply what's on"], [screen.g.quit, "Quit"]]
+                           .filter(function (h) { return h[0] !== ""; })
                 Row { required property var modelData; spacing: 8
                     Glyph { k: parent.modelData[0]; anchors.verticalCenter: parent.verticalCenter }
                     Text { text: parent.modelData[1]; color: Theme.label; font.family: Theme.body; font.pixelSize: 14; anchors.verticalCenter: parent.verticalCenter } }

ui/qml/PasswordScreen.qml

@@ -47,7 +47,7 @@ Rectangle {
             Text { visible: app.wrongPassword; text: "That password didn't work. Try again."; color: Theme.bad; font.family: Theme.body; font.pixelSize: 14 }
             Rectangle { width: parent.width; height: 46; radius: 12; color: Theme.note
                 Text { anchors.verticalCenter: parent.verticalCenter; x: 14; color: Theme.soft; font.family: Theme.body; font.pixelSize: 14
-                       text: ({ controller: "Press Steam + X for the on-screen keyboard.", keyboard: "Type your password and press Enter.", remote: "Select the field for the on-screen keyboard." })[Input.type] } }
+                       text: ({ controller: "Press Steam + X for the on-screen keyboard.", keyboard: "Type your password and press Enter.", steam: "Press X for Steam's on-screen keyboard, type your password and press A.", remote: "Select the field for the on-screen keyboard." })[Input.type] } }
             Item { width: parent.width; height: 48
                 Btn { k: Input.g.back; text: "Back"; onClicked: app.act("back") }
                 Btn { anchors.right: parent.right; k: Input.g.ok; text: "Apply"; primary: true; onClicked: screen.submit() } }