从QItemDelegate的自定义编辑器调用getOpenFileName时崩溃 [英] Crash when calling getOpenFileName from QItemDelegate's custom editor

问题描述

先决条件:

我有一个自定义QItemDelegate，它为树视图项目创建了自定义编辑器. 编辑器由QLineEdit和QToolButton组成.该按钮用于打开文件对话框，以选择文件并将其路径放入行编辑中. 我使用对QFileDialog :: getOpenFileName的调用来打开文件对话框.该对话框是Windows的本机文件对话框(这很重要).

I have a custom QItemDelegate which creates custom editor for treeview items. The editor consists of a QLineEdit and QToolButton. The button is used to open the file dialog for selecting the file and placing it's path into line edit. I use a call to QFileDialog::getOpenFileName to open the file dialog. The dialog is native Windows file dialog (this is important).

第一次创建编辑器时，无论我按该按钮多少次，一切正常.但是在关闭编辑器并再次将其重新打开后，第一次按下该按钮会导致崩溃.崩溃的原因是我的自定义编辑器最终被删除了.

When the editor is created the first time, everything works ok no matter how often I press that button. But after the editor is closed and reopened again the first press on the button results in a crash. The reason of the crash is that my custom editor eventually gets deleted.

这是一些代码:

void CCustomEditor::on_RunSetupBtn_clicked()
{
    auto qFilename = QFileDialog::getOpenFileName(this,
        "Select application to run",
        QString(),
        "Executable files (*.exe)");

    if (qFilename.isEmpty())
        return;

    SetCommandLine(QDir::toNativeSeparators(qFilename), m_qParameters);
}

推荐答案

我对getOpenFileName和getSaveFileName有类似的问题.我的解决方案是，在getOpenFileName之后，getSaveFileName之后或在函数末尾使用activateWindow()将窗口设置为活动窗口.

I have a similar problem with getOpenFileName and getSaveFileName. My solution is, after getOpenFileName, getSaveFileName or at the end of the function set the windows as active with activateWindow().

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