Better window events; pause on minimize; always on top

src/stremio_app/app.rs

@@ -7,9 +7,10 @@ use std::sync::Arc;
 use std::thread;
 use winapi::shared::windef::HWND__;
 use winapi::um::winuser::{
-    GetActiveWindow, GetSystemMetrics, GetWindowLongA, IsIconic, IsZoomed, SetWindowLongA,
+    GetForegroundWindow, GetSystemMetrics, GetWindowLongA, IsIconic, IsZoomed, SetWindowLongA,
-    GWL_EXSTYLE, GWL_STYLE, SM_CXSCREEN, SM_CYSCREEN, WS_CAPTION, WS_EX_CLIENTEDGE,
+    SetWindowPos, GWL_EXSTYLE, GWL_STYLE, HWND_NOTOPMOST, HWND_TOPMOST, SM_CXSCREEN, SM_CYSCREEN,
-    WS_EX_DLGMODALFRAME, WS_EX_STATICEDGE, WS_EX_WINDOWEDGE, WS_THICKFRAME,
+    SWP_FRAMECHANGED, SWP_NOMOVE, SWP_NOSIZE, WS_CAPTION, WS_EX_CLIENTEDGE, WS_EX_DLGMODALFRAME,
+    WS_EX_STATICEDGE, WS_EX_TOPMOST, WS_EX_WINDOWEDGE, WS_THICKFRAME,
 };
 
 use crate::stremio_app::ipc::{RPCRequest, RPCResponse, RPCResponseData, RPCResponseDataTransport};
@@ -17,6 +18,7 @@ use crate::stremio_app::stremio_player::Player;
 use crate::stremio_app::stremio_wevbiew::WebView;
 use crate::stremio_app::systray::SystemTray;
 
+// https://doc.qt.io/qt-5/qt.html#WindowState-enum
 bitflags! {
     struct WindowState: u8 {
         const MINIMIZED = 0x01;
@@ -37,28 +39,20 @@ pub struct WindowStyle {
 
 impl WindowStyle {
     pub fn get_window_state(self, hwnd: *mut HWND__) -> u32 {
-        let mut visibility: WindowState = WindowState::empty();
+        let mut state: WindowState = WindowState::empty();
-        visibility |= if 0 != unsafe { IsIconic(hwnd) } {
+        if 0 != unsafe { IsIconic(hwnd) } {
-            WindowState::MINIMIZED
+            state |= WindowState::MINIMIZED;
-        } else {
+        }
-            WindowState::empty()
+        if 0 != unsafe { IsZoomed(hwnd) } {
-        };
+            state |= WindowState::MAXIMIZED;
-        visibility |= if 0 != unsafe { IsZoomed(hwnd) } {
+        }
-            WindowState::MAXIMIZED
+        if hwnd == unsafe { GetForegroundWindow() } {
-        } else {
+            state |= WindowState::ACTIVE
-            WindowState::empty()
+        }
-        };
+        if self.full_screen {
-        visibility |= if hwnd == unsafe { GetActiveWindow() } {
+            state |= WindowState::FULL_SCREEN;
-            WindowState::ACTIVE
+        }
-        } else {
+        state.bits() as u32
-            WindowState::empty()
-        };
-        visibility |= if self.full_screen {
-            WindowState::FULL_SCREEN
-        } else {
-            WindowState::empty()
-        };
-        visibility.bits() as u32
     }
 }
 
@@ -71,10 +65,10 @@ pub struct MainWindow {
     #[nwg_resource(source_embed: Some(&data.embed), source_embed_str: Some("MAINICON"))]
     pub window_icon: nwg::Icon,
     #[nwg_control(icon: Some(&data.window_icon), title: "Stremio", flags: "MAIN_WINDOW|VISIBLE")]
-    #[nwg_events( OnWindowClose: [Self::on_quit(SELF, EVT_DATA)], OnInit: [Self::on_init], OnPaint: [Self::on_paint], OnMinMaxInfo: [Self::on_min_max(SELF, EVT_DATA)], OnWindowMaximize: [Self::on_maximize] )]
+    #[nwg_events( OnWindowClose: [Self::on_quit(SELF, EVT_DATA)], OnInit: [Self::on_init], OnPaint: [Self::on_paint], OnMinMaxInfo: [Self::on_min_max(SELF, EVT_DATA)], OnWindowMaximize: [Self::transmit_window_state_change], OnWindowMinimize: [Self::transmit_window_state_change] )]
     pub window: nwg::Window,
     #[nwg_partial(parent: window)]
-    #[nwg_events((tray_exit, OnMenuItemSelected): [Self::on_quit_notice], (tray_show_hide, OnMenuItemSelected): [Self::on_show_hide]) ]
+    #[nwg_events((tray, MousePressLeftUp): [Self::on_show_hide], (tray_exit, OnMenuItemSelected): [Self::on_quit_notice], (tray_show_hide, OnMenuItemSelected): [Self::on_show_hide], (tray_topmost, OnMenuItemSelected): [Self::on_toggle_topmost]) ]
     pub tray: SystemTray,
     #[nwg_partial(parent: window)]
     pub webview: WebView,
@@ -101,6 +95,33 @@ impl MainWindow {
     const BG_COLOR: [u8; 3] = [27, 17, 38];
     const MIN_WIDTH: i32 = 1000;
     const MIN_HEIGHT: i32 = 600;
+    fn transmit_window_full_screen_change(&self, prevent_close: bool) {
+        let web_channel = self.webview.channel.borrow();
+        let (web_tx, _) = web_channel
+            .as_ref()
+            .expect("Cannont obtain communication channel for the Web UI");
+        let web_tx_app = web_tx.clone();
+        let saved_style = self.saved_window_style.borrow();
+        web_tx_app
+            .send(RPCResponse::visibility_change(
+                self.window.visible(),
+                prevent_close as u32,
+                saved_style.full_screen,
+            ))
+            .ok();
+    }
+    fn transmit_window_state_change(&self) {
+        if let Some(hwnd) = self.window.handle.hwnd() {
+            let web_channel = self.webview.channel.borrow();
+            let (web_tx, _) = web_channel
+                .as_ref()
+                .expect("Cannont obtain communication channel for the Web UI");
+            let web_tx_app = web_tx.clone();
+            let style = self.saved_window_style.borrow();
+            let state = style.clone().get_window_state(hwnd);
+            web_tx_app.send(RPCResponse::state_change(state)).ok();
+        }
+    }
     fn on_init(&self) {
         self.webview.endpoint.set(self.webui_url.clone()).ok();
         let small_side = cmp::min(nwg::Monitor::width(), nwg::Monitor::height()) * 70 / 100;
@@ -252,20 +273,35 @@ impl MainWindow {
             self.splash_frame.set_size(w, h);
             self.splash.set_size(s, s);
             self.splash.set_position(w as i32 / 2 - s as i32 / 2, 0);
+        } else {
+            self.transmit_window_state_change();
         }
     }
     fn on_toggle_fullscreen_notice(&self) {
         if let Some(hwnd) = self.window.handle.hwnd() {
             let mut saved_style = self.saved_window_style.borrow_mut();
             if saved_style.full_screen {
+                let topmost = if saved_style.ex_style as u32 & WS_EX_TOPMOST == WS_EX_TOPMOST {
+                    HWND_TOPMOST
+                } else {
+                    HWND_NOTOPMOST
+                };
                 unsafe {
                     SetWindowLongA(hwnd, GWL_STYLE, saved_style.style);
                     SetWindowLongA(hwnd, GWL_EXSTYLE, saved_style.ex_style);
+                    SetWindowPos(
+                        hwnd,
+                        topmost,
+                        saved_style.pos.0,
+                        saved_style.pos.1,
+                        saved_style.size.0 as i32,
+                        saved_style.size.1 as i32,
+                        SWP_FRAMECHANGED,
+                    );
                 }
-                self.window
-                    .set_position(saved_style.pos.0, saved_style.pos.1);
-                self.window.set_size(saved_style.size.0, saved_style.size.1);
                 saved_style.full_screen = false;
+                self.tray.tray_topmost.set_enabled(true);
+                self.tray.tray_topmost.set_checked(topmost == HWND_TOPMOST);
             } else {
                 saved_style.pos = self.window.position();
                 saved_style.size = self.window.size();
@@ -286,29 +322,21 @@ impl MainWindow {
                                 | WS_EX_CLIENTEDGE as i32
                                 | WS_EX_STATICEDGE as i32),
                     );
+                    SetWindowPos(
+                        hwnd,
+                        HWND_NOTOPMOST,
+                        0,
+                        0,
+                        GetSystemMetrics(SM_CXSCREEN),
+                        GetSystemMetrics(SM_CYSCREEN),
+                        SWP_FRAMECHANGED,
+                    );
                 }
-                self.window.set_position(0, 0);
-                self.window
-                    .set_size(unsafe { GetSystemMetrics(SM_CXSCREEN) as u32 }, unsafe {
-                        GetSystemMetrics(SM_CYSCREEN) as u32
-                    });
                 saved_style.full_screen = true;
+                self.tray.tray_topmost.set_enabled(false);
             }
-            let visibility = saved_style.clone().get_window_state(hwnd);
-
-            let web_channel = self.webview.channel.borrow();
-            let (web_tx, _) = web_channel
-                .as_ref()
-                .expect("Cannont obtain communication channel for the Web UI");
-            let web_tx_app = web_tx.clone();
-            web_tx_app
-                .send(RPCResponse::visibility_change(
-                    true,
-                    visibility,
-                    saved_style.full_screen,
-                ))
-                .ok();
         }
+        self.transmit_window_full_screen_change(true);
     }
     fn on_quit_notice(&self) {
         nwg::stop_thread_dispatch();
@@ -316,40 +344,44 @@ impl MainWindow {
     fn on_hide_splash_notice(&self) {
         self.splash_frame.set_visible(false);
     }
-    fn on_maximize(&self) {}
+    fn on_toggle_topmost(&self) {
+        if let Some(hwnd) = self.window.handle.hwnd() {
+            let topmost = if unsafe { GetWindowLongA(hwnd, GWL_EXSTYLE) } as u32 & WS_EX_TOPMOST
+                == WS_EX_TOPMOST
+            {
+                HWND_NOTOPMOST
+            } else {
+                HWND_TOPMOST
+            };
+            unsafe {
+                SetWindowPos(
+                    hwnd,
+                    topmost,
+                    0,
+                    0,
+                    0,
+                    0,
+                    SWP_NOMOVE | SWP_NOSIZE | SWP_FRAMECHANGED,
+                );
+            }
+            let mut saved_style = self.saved_window_style.borrow_mut();
+            saved_style.ex_style = unsafe { GetWindowLongA(hwnd, GWL_EXSTYLE) };
+            self.tray
+                .tray_topmost
+                .set_checked((saved_style.ex_style as u32 & WS_EX_TOPMOST) == WS_EX_TOPMOST);
+        }
+    }
     fn on_show_hide(&self) {
         self.window.set_visible(!self.window.visible());
         self.tray.tray_show_hide.set_checked(self.window.visible());
-        let web_channel = self.webview.channel.borrow();
+        self.transmit_window_state_change();
-        let (web_tx, _) = web_channel
-            .as_ref()
-            .expect("Cannont obtain communication channel for the Web UI");
-        let web_tx_app = web_tx.clone();
-        let saved_style = self.saved_window_style.borrow();
-        web_tx_app
-            .send(RPCResponse::visibility_change(
-                self.window.visible(),
-                1,
-                saved_style.full_screen,
-            ))
-            .ok();
     }
     fn on_quit(&self, data: &nwg::EventData) {
-        if let Some(hwnd) = self.window.handle.hwnd() {
         if let nwg::EventData::OnWindowClose(data) = data {
             data.close(false);
         }
         self.window.set_visible(false);
-            let web_channel = self.webview.channel.borrow();
+        self.tray.tray_show_hide.set_checked(self.window.visible());
-            let (web_tx, _) = web_channel
+        self.transmit_window_full_screen_change(false);
-                .as_ref()
-                .expect("Cannont obtain communication channel for the Web UI");
-            let web_tx_app = web_tx.clone();
-            let saved_style = self.saved_window_style.borrow();
-            let visibility = saved_style.clone().get_window_state(hwnd);
-            web_tx_app
-                .send(RPCResponse::visibility_change(false, visibility, false))
-                .ok();
-        }
     }
 }

src/stremio_app/ipc.rs

@@ -1,8 +1,8 @@
+use serde::{Deserialize, Serialize};
+use serde_json::{self, json};
 use std::cell::RefCell;
 use std::sync::mpsc;
 use std::sync::{Arc, Mutex};
-use serde::{Deserialize, Serialize};
-use serde_json::{self, json};
 
 pub type Channel = RefCell<Option<(mpsc::Sender<String>, Arc<Mutex<mpsc::Receiver<String>>>)>>;
 
@@ -51,4 +51,16 @@ impl RPCResponse {
         };
         serde_json::to_string(&resp).expect("Cannot build response")
     }
+    pub fn state_change(state: u32) -> String {
+        let resp = RPCResponse {
+            id: 1,
+            object: "transport".to_string(),
+            response_type: 1,
+            args: Some(json!(["win-state-changed" ,{
+                "state": state,
+            }])),
+            ..Default::default()
+        };
+        serde_json::to_string(&resp).expect("Cannot build response")
+    }
 }

src/stremio_app/systray.rs

@@ -8,7 +8,7 @@ pub struct SystemTray {
     #[nwg_resource(source_embed: Some(&data.embed), source_embed_str: Some("MAINICON"))]
     pub tray_icon: nwg::Icon,
     #[nwg_control(icon: Some(&data.tray_icon), tip: Some("Stremio"))]
-    #[nwg_events(MousePressLeftUp: [Self::show_menu], OnContextMenu: [Self::show_menu])]
+    #[nwg_events(OnContextMenu: [Self::show_menu])]
     pub tray: nwg::TrayNotification,
     #[nwg_control(popup: true)]
     pub tray_menu: nwg::Menu,