Qt中设置对话框的属性

因为最近才深入的使用Qt，所以很多常用的属性还不知道怎么设置。今天在写Qt中的弹出对话框的时候，对话框是出来了，但是没处理完对话框，点击对话框以外的窗体位置还是可以和主窗体交互，我记得在winForm编程的时候，应该设置主窗体之类的。而在Qt下称为模态和非模态对话框。

对应的英文文档为：

enum Qt::WindowModality

This enum specifies the behavior of a modal window. A modal window is one that blocks input to other windows. Note that windows that are children of a modal window are not blocked.

The values are:

Constant	Value	Description
Qt::NonModal	0	The window is not modal and does not block input to other windows.
Qt::WindowModal	1	The window is modal to a single window hierarchy and blocks input to its parent window, all grandparent windows, and all siblings of its parent and grandparent windows.
Qt::ApplicationModal	2	The window is modal to the application and blocks input to all windows

Constant	Value	Description
Qt::NonModal	0	非模态，可以和程序的其它窗体交互。
Qt::WindowModal	1	窗体模态，程序在未处理完对话框时将阻止和对话框的父窗体、父父窗体以及父窗体的兄弟姐妹窗体及其父窗体交互。
Qt::ApplicationModal	2	应用程序模态，阻止和任何其它窗体进行交互。

属性设置：dialog->setWindowModality(Qt::ApplicationModal);