[desktop-webview-window] Move Webview Window (#280)

Author: Iri-Hor

packages/desktop_webview_window/lib/src/webview.dart

@@ -56,6 +56,9 @@ abstract class Webview {
   /// Show or hide webview window
   Future<void> setWebviewWindowVisibility(bool visible);
 
+  /// Move and Resize the webview window
+  Future<void> moveWebviewWindow(int left, int top, int width, int height);
+
   /// Activates the webview window (giving it the focus)
   Future<void> bringToForeground();
 

packages/desktop_webview_window/lib/src/webview_impl.dart

@@ -178,6 +178,17 @@ class WebviewImpl extends Webview {
     });
   }
 
+  @override
+  Future<void> moveWebviewWindow(int left, int top, int width, int height) {
+    return channel.invokeMethod("moveWebviewWindow", {
+      "viewId": viewId,
+      "left": left,
+      "top": top,
+      "width": width,
+      "height": height,
+    });
+  }
+
   @override
   Future<void> bringToForeground() {
     return channel.invokeMethod("bringToForeground", {

packages/desktop_webview_window/windows/web_view_window_plugin.cc

@@ -176,6 +176,23 @@ void WebviewWindowPlugin::HandleMethodCall(
     }
     windows_[window_id]->setVisibility(visible);
     result->Success();
+  } else if (method_call.method_name() == "moveWebviewWindow") {
+    auto* arguments = std::get_if<flutter::EncodableMap>(method_call.arguments());
+    auto window_id = arguments->at(flutter::EncodableValue("viewId")).LongValue();
+    auto left = std::get<int>(arguments->at(flutter::EncodableValue("left")));
+    auto top = std::get<int>(arguments->at(flutter::EncodableValue("top")));
+    auto width = std::get<int>(arguments->at(flutter::EncodableValue("width")));
+    auto height = std::get<int>(arguments->at(flutter::EncodableValue("height")));
+    if (!windows_.count(window_id)) {
+      result->Error("0", "can not find webview window for id");
+      return;
+    }
+    if (!windows_[window_id]->GetWebView()) {
+      result->Error("0", "webview window not ready");
+      return;
+    }
+    windows_[window_id]->moveWebviewWindow(left, top, width, height);
+    result->Success();
   } else if (method_call.method_name() == "bringToForeground") {
     auto* arguments = std::get_if<flutter::EncodableMap>(method_call.arguments());
     auto window_id = arguments->at(flutter::EncodableValue("viewId")).LongValue();

packages/desktop_webview_window/windows/webview_window.cc

@@ -144,8 +144,11 @@ void WebviewWindow::setVisibility(bool visible)
     ::ShowWindow(hwnd_.get(), SW_HIDE);
 }
 
-void WebviewWindow::bringToForeground()
-{
+void WebviewWindow::moveWebviewWindow(int left, int top, int width, int height) {
+  ::SetWindowPos(hwnd_.get(), nullptr, left, top, width, height, SWP_NOZORDER | SWP_NOACTIVATE);
+}
+
+void WebviewWindow::bringToForeground() {
   SetForegroundWindow(hwnd_.get());
 }
 

packages/desktop_webview_window/windows/webview_window.h

@@ -58,6 +58,8 @@ class WebviewWindow {
 
   void setVisibility(bool visible);
 
+  void moveWebviewWindow(int left, int top, int width, int height);
+
   void bringToForeground();
 
   [[nodiscard]] const std::unique_ptr<webview_window::WebView> &GetWebView() const {