Lesson5 How to open a new window from a pushbutton
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1. 右击项目,选择add new->QT->QT Designer Form class,然后template选择Dialog without buttons,将类命名为SecDialog
2.然后在主窗口里面拖一个pushbutton,双击修改它的标题为Open Second Win,右击添加clicked slot
3.由于要在Mainwindow.cpp里面引用它,所以要包含它的头文件
#include "secdialog.h"
4.在slog函数里面写入如下语句
void MainWindow::on_pushButton_3_clicked(){ SecDialog secDialog(this); secDialog.setModal(true); secDialog.exec();}
这样就得到了一个model dialog
6.下面我们建一个modeless dialog
我们拖动一个pushbutton, 建立clicked() slot,然后添加如下语句
由于是非模态的,所以我们最好创建一个成员变量指针,而不是像model dialog一样用临时变量来存
所以我们在mainwindow.h头文件里面引用secdialog.h
#include "secdialog.h"
然后创建一个指针变量
SecDialgo* m_pSecDialog;
最后我们在clicked slot函数里面写入如下语句:
void MainWindow::on_pushButton_4_clicked(){ m_pSecDialog = new SecDialog(this); m_pSecDialog->show();}
注意观察,现在main window在底下是可以被选中的
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