解决“wglMakeCurrent failed in MakeCurrent(), error: 句柄无效。”问题

该问题针对QT中有两个及以上数量的QVTKWidget。

出现的问题描述：当我点击右上角的关闭按钮时，vtk提示框会出现“wglMakeCurrent failed in MakeCurrent(), error: 句柄无效”这个error。

查阅VTK相关论坛（wglMakeCurrent failed in MakeCurrent after closed a window with two vtk widget. - Support - VTK）找到了解决方案-->手动关闭vtk控件即可。

-- 头文件 --

#include <QCloseEvent>

...    
    
class ShowDicoms : public QMainWindow
{
    Q_OBJECT

public:
    ShowDicoms(QWidget *parent = nullptr);
    ~ShowDicoms();

    // 手动关闭qvtkWidget控件，以解决“wglMakeCurrent failed in MakeCurrent(), error: 句柄无效。”问题
    void closeEvent(QCloseEvent* event);

private:
    Ui::ShowDicomsClass ui;
};

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-- .cpp --
...
void ShowDicoms::closeEvent(QCloseEvent* event)
{
	delete ui.qvtkWidget;
	delete ui.qvtkWidget_2;
	delete ui.qvtkWidget_3;
	event->accept();
}