关闭后如何销毁child window？

Question

我做了以下申请：

如您所见，单击 parent window 中的设置按钮会打开一个名为 "settings" 的新 child window，但是当关闭它时child window 不幸的是，它没有关闭并保持隐藏状态。当再次打开 child window 时，它会创建另一个 child window 的实例，依此类推。

问题是在关闭 parent window 时它没有关闭并保留在 task manager -> processes。

// Creates an instance of child window
void mainfrm::settings_btnOnButtonClick(wxCommandEvent & event) {
    this->settingWindow = new settingsfrm(this);
    settingWindow->ShowModal();
}

// When closing the child window
void settingsfrm::cancel_btnOnButtonClick(wxCommandEvent & event) {
    this->EndModal(0);
}

// When destroying the variable that contains the instance of child window
mainfrm::~mainfrm() {
    settingWindow = NULL;
    delete settingWindow;
}

Answer 1

根据the documentation：

the modal dialog is one of the very few examples of wxWindow-derived objects which may be created on the stack and not on the heap

所以你的第一个代码块可以这样写（假设 settingsfrm 派生自 wxDialog）：

// Creates an instance of child window
void mainfrm::settings_btnOnButtonClick(wxCommandEvent & event) {
    settingsfrm settingWindow(this);
    int i = settingWindow.ShowModal();

    //if necessary, do something with i here
}

您的主应用程序框架将在显示 settingWindow 时等待，然后当 settingWindow 超出范围时自行删除。不需要在主框架中存储用于设置窗口的指针。

关闭后如何销毁child window？

How to destroy the child window after closing?

c++

wxwidgets