#include "widget.h"

 #include "ui_widget.h"

 #include "windows.h"

 #include <QWindow>

 #include <QProcess>

 Widget::Widget(QWidget *parent) :

     QWidget(parent),

     ui(new Ui::Widget)

 {

     ui->setupUi(this);

 }

 Widget::~Widget()

 {

     delete ui;

 }

 //网上找到的把窗体嵌入桌面的函数

 static BOOL enumUserWindowsCB(HWND hwnd,LPARAM lParam)

 {

     long wflags = GetWindowLong(hwnd, GWL_STYLE);

     if(!(wflags & WS_VISIBLE)) return TRUE;

     HWND sndWnd;

     if( !(sndWnd=FindWindowEx(hwnd, NULL, L"SHELLDLL_DefView", NULL)) ) return TRUE;

     HWND targetWnd;

      if( !(targetWnd=FindWindowEx(sndWnd, NULL, L"SysListView32", L"FolderView")) ) return TRUE;

     HWND* resultHwnd = (HWND*)lParam;

     *resultHwnd = targetWnd;

     return FALSE;

  }

 //网上找到的把窗体嵌入桌面的函数

 HWND findDesktopIconWnd()

  {

     HWND resultHwnd = NULL;

     EnumWindows((WNDENUMPROC)enumUserWindowsCB, (LPARAM)&resultHwnd);

     return resultHwnd;

  }

 void Widget::on_pushButton_clicked()

 {

     HWND hwnWindow=FindWindow(NULL,L"DemoGame");

     HWND desktopHwnd=findDesktopIconWnd();

     QWindow *window=QWindow::fromWinId((WId)hwnWindow);

 //    //将窗口嵌入到桌面上

 //    LONG styleValue=GetWindowLong(hwnWindow,GWL_STYLE);

 //    styleValue&=~WS_CAPTION;

 //    SetWindowLong(hwnWindow,GWL_STYLE,styleValue);

 //    SetParent(hwnWindow,desktopHwnd);

 //    //嵌入Qt窗口

 //    SetParent(hwnWindow,(HWND)QWidget::winId());

 //    window->showFullScreen();

     //嵌入Qt窗口,需要设置焦点让Ue4接受按键事件

     QWidget *windowWidget=QWidget::createWindowContainer(window);

     ui->verticalLayout->addWidget(windowWidget);

     windowWidget->setFocusPolicy(Qt::StrongFocus);

     windowWidget->setFocus();

     windowWidget->grabKeyboard();

     windowWidget->grabMouse();

     this->setFocusPolicy(Qt::ClickFocus);

 }