From 4fa2b3a6e99bbb11abc68d1b1e87a6c71cc09f54 Mon Sep 17 00:00:00 2001
From: David Rowe <david@ctrlaltstudio.com>
Date: Mon, 9 Feb 2015 22:07:12 -0800
Subject: [PATCH] Fix maximized Windows window unintentionally changing to
 windowed

This stops a maximized Windows window changing to being windowed when
you click on a menu item.
---
 interface/src/Application.cpp | 13 +++++++++++--
 interface/src/Application.h   |  2 ++
 interface/src/main.cpp        |  3 +--
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 95b8cbb835..aa24711509 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -156,18 +156,27 @@ public:
     bool nativeEventFilter(const QByteArray &eventType, void* msg, long* result) Q_DECL_OVERRIDE {
         if (eventType == "windows_generic_MSG") {
             MSG* message = (MSG*)msg;
+
             if (message->message == UWM_IDENTIFY_INSTANCES) {
                 *result = UWM_IDENTIFY_INSTANCES;
                 return true;
             }
-            if (message->message == WM_SHOWWINDOW) {
-                Application::getInstance()->getWindow()->showNormal();
+
+            if (message->message == UWM_SHOW_APPLICATION) {
+                MainWindow* applicationWindow = Application::getInstance()->getWindow();
+                if (applicationWindow->isMinimized()) {
+                    applicationWindow->showNormal();  // Restores to windowed or maximized state appropriately.
+                }
+                Application::getInstance()->setActiveWindow(applicationWindow);  // Flashes the taskbar icon if not focus.
+                return true;
             }
+
             if (message->message == WM_COPYDATA) {
                 COPYDATASTRUCT* pcds = (COPYDATASTRUCT*)(message->lParam);
                 QUrl url = QUrl((const char*)(pcds->lpData));
                 if (url.isValid() && url.scheme() == HIFI_URL_SCHEME) {
                     DependencyManager::get<AddressManager>()->handleLookupString(url.toString());
+                    return true;
                 }
             }
         }
diff --git a/interface/src/Application.h b/interface/src/Application.h
index e131766309..d015d09035 100644
--- a/interface/src/Application.h
+++ b/interface/src/Application.h
@@ -117,6 +117,8 @@ static const QString INFO_EDIT_ENTITIES_PATH = "html/edit-entities-commands.html
 #ifdef Q_OS_WIN
 static const UINT UWM_IDENTIFY_INSTANCES = 
     RegisterWindowMessage("UWM_IDENTIFY_INSTANCES_{8AB82783-B74A-4258-955B-8188C22AA0D6}");
+static const UINT UWM_SHOW_APPLICATION =
+    RegisterWindowMessage("UWM_SHOW_APPLICATION_{71123FD6-3DA8-4DC1-9C27-8A12A6250CBA}");
 #endif
 
 class Application;
diff --git a/interface/src/main.cpp b/interface/src/main.cpp
index 4881bd4ff4..61278821ee 100644
--- a/interface/src/main.cpp
+++ b/interface/src/main.cpp
@@ -46,8 +46,7 @@ int main(int argc, const char * argv[]) {
         HWND otherInstance = NULL;
         EnumWindows(enumWindowsCallback, (LPARAM)&otherInstance);
         if (otherInstance) {
-            ShowWindow(otherInstance, SW_RESTORE);
-            SetForegroundWindow(otherInstance);
+            SendMessage(otherInstance, UWM_SHOW_APPLICATION, 0, 0);
 
             QUrl url = QUrl(argv[1]);
             if (url.isValid() && url.scheme() == HIFI_URL_SCHEME) {