c++ - 关闭后如何销毁子窗口？

Question

我已提出以下申请:

如您所见，单击父窗口中的设置按钮会打开一个名为“设置”的新子窗口，但不幸的是，当关闭该子窗口时，它并未关闭并保持隐藏状态。当再次打开子窗口时，它会创建另一个子窗口的实例，依此类推。

问题是在关闭父窗口时它并没有关闭，而是保留在任务管理器 -> 进程中。

// 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等待 settingWindow 显示，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。