新增大窗口播放视频按键，窗口大小根据解码视频分辨率自动调整，关掉大窗口回到原来位置播放视频

FactoryTestTool/SourceCode/Media/VideoDecoder/FocusWindow.h

@@ -1,3 +1,4 @@
+// FocusWindow.h
 #include <QDialog>
 #include <QVBoxLayout>
 #include <QLabel>
@@ -8,12 +9,13 @@ class FocusWindowDialog : public QDialog
     Q_OBJECT
 
 public:
+    QLabel* videoDisplayLabel;
     FocusWindowDialog(QWidget* parent = nullptr, const QSize& labelSize = QSize(480, 640)) : QDialog(parent)
     {
         QVBoxLayout* layout = new QVBoxLayout(this);
-        QLabel* label = new QLabel("1111 This is a new window opened by clicking the new button.", this);
-        label->setFixedSize(labelSize); // 设置QLabel的固定大小
-        layout->addWidget(label);
+        videoDisplayLabel = new QLabel(this);
+        videoDisplayLabel->setFixedSize(labelSize); // 设置QLabel的固定大小
+        layout->addWidget(videoDisplayLabel);
 
         QPushButton* closeButton = new QPushButton("Close", this);
         layout->addWidget(closeButton);