[feat] add Windows privacy screen and prefer DXGI capture

apps/desktop/src/gui/ui/main_window.slint

@@ -50,6 +50,7 @@ export global UiStrings {
     in-out property <string> self-hosted: "Self-hosted server";
     in-out property <string> autostart: "Start with system";
     in-out property <string> daemon: "Run in background";
+    in-out property <string> privacy-on-connect: "Privacy screen on connect";
     in-out property <string> file-save-path: "File save path";
     in-out property <string> default-desktop: "Desktop";
     in-out property <string> server-host: "Server host";
@@ -246,6 +247,8 @@ export component MainWindow inherits Window {
     in-out property <bool> self-hosted-enabled: false;
     in-out property <bool> autostart-enabled: false;
     in-out property <bool> daemon-enabled: false;
+    in-out property <bool> privacy-setting-visible: false;
+    in-out property <bool> privacy-on-connect-enabled: true;
     in-out property <string> file-save-path: "";
     in-out property <string> server-host: "";
     in-out property <string> server-port: "";
@@ -1445,6 +1448,11 @@ export component MainWindow inherits Window {
                         Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 162px; height: 24px; text: UiStrings.language; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
                         CompactComboBox { x: root.compact-language ? 106px : 174px; y: 2px; model: ["中文", "English", "Русский"]; current-index <=> root.language-index; }
                     }
+                    if root.privacy-setting-visible: Rectangle {
+                        height: 30px;
+                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.privacy-on-connect; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
+                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.privacy-on-connect-enabled; }
+                    }
                     Rectangle {
                         height: 30px;
                         Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 162px; height: 24px; text: UiStrings.video-quality; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }

apps/desktop/src/gui/ui/stream_window.slint

@@ -25,6 +25,9 @@ export struct NetworkStatsRow {
 export global StreamStrings {
     in-out property <string> select-display: "Select Display";
     in-out property <string> send-shortcut: "Send Shortcut";
+    in-out property <string> privacy-enable: "Enable privacy screen";
+    in-out property <string> privacy-disable: "Turn privacy off / recover";
+    in-out property <string> privacy-block-input: "Block local input on enable";
     in-out property <string> control-mouse: "Control Mouse";
     in-out property <string> release-mouse: "Release Mouse";
     in-out property <string> audio: "Audio Capture";
@@ -134,6 +137,12 @@ export component StreamWindow inherits Window {
     in property <[string]> displays;
     in-out property <int> selected-display: 0;
     in property <bool> mouse-control-enabled: true;
+    in property <bool> privacy-can-toggle: false;
+    in property <bool> privacy-active: false;
+    in property <bool> privacy-block-input: true;
+    in property <bool> privacy-can-change-input: false;
+    in property <bool> privacy-remote-paused: false;
+    in property <string> privacy-status-text: "Privacy screen: waiting for host";
     // Numeric values mirror crossdesk::RemoteCursorShape and Slint's MouseCursor.
     in property <bool> remote-cursor-active: false;
     in property <int> remote-cursor-shape: 0;
@@ -154,6 +163,8 @@ export component StreamWindow inherits Window {
     callback switch-display(int);
     callback send-shortcut(string);
     callback toggle-mouse-control;
+    callback toggle-privacy;
+    callback toggle-privacy-input;
     callback toggle-audio;
     callback select-file;
     callback close-file-transfer;
@@ -232,9 +243,9 @@ export component StreamWindow inherits Window {
         let shortcut-menu-y = control.y + 40px;
         let over-shortcut-menu = root.shortcut-menu-open
             && pointer-x >= shortcut-menu-x
-            && pointer-x <= shortcut-menu-x + 150px
+            && pointer-x <= shortcut-menu-x + 360px
             && pointer-y >= shortcut-menu-y
-            && pointer-y <= shortcut-menu-y + 68px;
+            && pointer-y <= shortcut-menu-y + 200px;
         return over-control || over-display-menu || over-shortcut-menu;
     }
 
@@ -943,7 +954,7 @@ export component StreamWindow inherits Window {
             }
 
             if root.shortcut-menu-open: Rectangle {
-                x: control.x + (root.control-docked-left ? 41px : 74px); y: control.y + 40px; width: 150px; height: 68px;
+                x: control.x + (root.control-docked-left ? 41px : 74px); y: control.y + 40px; width: 360px; height: 200px;
                 background: white; border-width: 1px; border-color: ImGuiLineStyle.border; border-radius: 5px; z: 11;
                 VerticalLayout {
                     padding: 4px; spacing: 1px;
@@ -959,9 +970,34 @@ export component StreamWindow inherits Window {
                             clicked => { root.send-shortcut(shortcut); root.shortcut-menu-open = false; }
                         }
                     }
+                    Rectangle {
+                        height: 29px; background: privacy-touch.has-hover ? #e8eef9 : transparent;
+                        Text { x: 8px; text: root.privacy-active ? StreamStrings.privacy-disable : StreamStrings.privacy-enable; color: root.privacy-can-toggle ? #30343b : #8a8f96; font-size: ImGuiFontStyle.body; vertical-alignment: center; }
+                        privacy-touch := TouchArea {
+                            enabled: root.privacy-can-toggle;
+                            pointer-event(event) => { if event.kind == PointerEventKind.down { root.suppress-next-remote-pointer-release = true; } }
+                            clicked => { root.toggle-privacy(); }
+                        }
+                    }
+                    Rectangle {
+                        height: 29px; background: privacy-input-touch.has-hover ? #e8eef9 : transparent;
+                        Text { x: 8px; text: (root.privacy-block-input ? "[✓] " : "[ ] ") + StreamStrings.privacy-block-input; color: root.privacy-can-change-input ? #30343b : #8a8f96; font-size: ImGuiFontStyle.body; vertical-alignment: center; }
+                        privacy-input-touch := TouchArea {
+                            enabled: root.privacy-can-change-input;
+                            pointer-event(event) => { if event.kind == PointerEventKind.down { root.suppress-next-remote-pointer-release = true; } }
+                            clicked => { root.toggle-privacy-input(); }
+                        }
+                    }
+                    Text { height: 68px; text: root.privacy-status-text; wrap: word-wrap; color: #555b66; font-size: ImGuiFontStyle.body; }
                 }
             }
 
+            if root.privacy-remote-paused: Rectangle {
+                x: 0px; y: 65px; width: parent.width; height: parent.height - 65px;
+                background: #16181d; z: 6;
+                Text { x: 30px; width: parent.width - 60px; text: root.privacy-status-text; color: #eeeeee; wrap: word-wrap; horizontal-alignment: center; vertical-alignment: center; }
+            }
+
             // Transfer progress overlay at bottom-left.
             if root.file-transfer-visible: Rectangle {
                 x: 18px; y: parent.height - min(210px, parent.height * 0.35); width: min(430px, parent.width * 0.6); height: min(190px, parent.height * 0.32);

apps/desktop/src/gui/ui/ui_localization.h

@@ -71,6 +71,7 @@ inline int ApplyMainWindowStrings(
       Text(localization::self_hosted_server_config[language]));
   strings.set_autostart(Text(localization::enable_autostart[language]));
   strings.set_daemon(Text(localization::enable_daemon[language]));
+  strings.set_privacy_on_connect(Text(localization::privacy_on_connect[language]));
   strings.set_file_save_path(
       Text(localization::file_transfer_save_path[language]));
   strings.set_default_desktop(Text(localization::default_desktop[language]));
@@ -138,6 +139,9 @@ inline int ApplyStreamWindowStrings(
   auto& strings = window->template global<ui::StreamStrings>();
   strings.set_select_display(Text(localization::select_display[language]));
   strings.set_send_shortcut(Text(localization::send_shortcut[language]));
+  strings.set_privacy_enable(Text(localization::privacy_enable[language]));
+  strings.set_privacy_disable(Text(localization::privacy_disable[language]));
+  strings.set_privacy_block_input(Text(localization::privacy_block_input[language]));
   strings.set_control_mouse(Text(localization::control_mouse[language]));
   strings.set_release_mouse(Text(localization::release_mouse[language]));
   strings.set_audio(Text(localization::audio_capture[language]));
@@ -167,4 +171,4 @@ inline int ApplyStreamWindowStrings(
 }  // namespace crossdesk::ui_localization
 
 
-#endif
+#endif