Attempting to add QLayout "" to MainWindow "", which already has a layout 给QWidget或者QDialog设置布局的时候方
来源:互联网 发布:麻瓜编程怎么样 编辑:程序博客网 时间:2024/05/29 12:41
Attempting to add QLayout "" to MainWindow "", which already has a layout
给QWidget或者QDialog设置布局的时候方式很简单。创建好一个布局:mainLayout,然后不停地把各个控件往mainLayout里面放,最后调用setLayout(mainLayout)就行了。
QMainWindow中使用这个方法的时候却不管用,因为QMainWindow是默认有layout的,所以再次设置layout会失效。
会出现这种提示:
QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout
这句话的意思是说,你已经给MainWindow设置过一个布局了,再设置一个会出错。
该如何给QMainWindow正确地设置布局呢
要想QMainWidget创建布局,合理的步骤应该是这样的:
第一步创建一个QWidget实例,并将这个实例设置为centralWidget:
然后创建一个主布局mainLayout,并把所需要的所有控件都往里面放(工具栏、菜单栏、状态栏除外):
...
最一步就是将widget的布局设置为mainLayout
1
2
3
4
5
6
7
8
9
10
11
12
widget =
new
QWidget();
this
->setCentralWidget(widget);
cbox =
new
QCheckBox(
this
);
cbox->setText(
"choose"
);
cbox->setChecked(
false
);
button =
new
QPushButton(
this
);
QVBoxLayout *layout =
new
QVBoxLayout(
this
);
layout->addWidget(cbox);
layout->addWidget(button);
widget->setLayout(layout);
阅读全文
0 0
- Attempting to add QLayout "" to MainWindow "", which already has a layout 给QWidget或者QDialog设置布局的时候方
- qt QLayout: Attempting to add QLayout "" to MainWindow "", which already has a layout. 错误
- QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout
- QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout
- QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout
- QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout
- Qt:Attempting to add QLayout "" to MainWindow "", which already has a layout
- setLayout: Attempting to set QLayout "" on MainWindow "MainWindow", which already has a layout
- setLayout: Attempting to set QLayout "" on MainWindow "MainWindow", which already has a layout
- setLayout: Attempting to set QLayout "" on MainWindow "MainWindow", which already has a layout
- Qt提示:setLayout: Attempting to set QLayout "" on MainWindow "MainWindow", which already has a layout
- setLayout: Attempting to set QLayout "" on MainWindow "MainWindow", which already has a layout
- QT Widget::setLayout: Attempting to set QLayout “” on Widget “”, which already has a layout
- Qt中使用setLayout()函数时报错------Attempting to set QLayout "" on MainWindow "MainWindow",which already has
- pyqt 出现Attempting to add QLayout
- QMainWindow与QWidget和QDialog设置布局的不同之处
- QMainWindow与QWidget和QDialog设置布局的不同之处
- QT中QWidget、QDialog以及MainWindow的区别
- 利用软引用和弱引用避免OOM
- BZOJ 3643: Phi的反函数 搜索
- 做IT的,不管你是运维、开发或架构师,这些安全知识你不得不懂
- 在Windows2012-64位-安装oracle10的经验:成功解决“TNS-12546: TNS: 权限被拒绝 (permission denied)”问题
- Java时间日期格式转换
- Attempting to add QLayout "" to MainWindow "", which already has a layout 给QWidget或者QDialog设置布局的时候方
- Java基础知识总结一
- shell脚本基础知识
- 设计模式三(单例设计模式)
- STM32低功耗设计
- oracle-基本操作
- 代码中设置View
- Python创建目录文件夹
- 经典的图算法