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This article mainly explains "what are the skills for the use of Qt". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what are the skills for using Qt".

Get the properties of the class

Const QMetaObject * metaobject = object- > metaObject (); int count = metaobject- > propertyCount (); for (int I = 0; I

Property (I); const char * name = metaproperty.name (); QVariant value = object- > property (name); qDebug () lineEdit- > height ()); QHBoxLayout * layout = new QHBoxLayout (ui- > lineEdit); layout- > setMargin (0); layout- > addStretch (); layout- > addWidget (btn)

To style the QLCDNumber control, you need to set the segmentstyle of QLCDNumber to flat.

Ingenious use of findChildren can find all the child controls under this control. FindChild is to find a single.

/ / find the control QList widgets = parentWidget.findChildren ("widgetname") of the specified class name objectName; / / find all QPushButtonQList allPButtons = parentWidget.findChildren (); / / find first-level child controls, otherwise all child controls QList childButtons = parentWidget.findChildren (QString (), Qt::FindDirectChildrenOnly) will be traversed all the time.

Ingenious use of inherits to determine whether it belongs to a certain category.

QTimer * timer = new QTimer; / / QTimer inherits QObjecttimer- > inherits ("QTimer"); / / returns truetimer- > inherits ("QObject"); / / returns truetimer- > inherits ("QAbstractButton"); / / returns false

Using the weak attribute mechanism, you can store temporary values for passing judgment. You can list all weak attribute names by widget- > dynamicPropertyNames (), and then fetch the values of the corresponding weak attributes by widget- > property ("name").

During development, whether for maintenance convenience or memory savings, there should be a qss file to hold all the stylesheets, instead of writing setStyleSheet everywhere. If it is the beginner stage or the test phase can directly UI right-click to set the stylesheet, the formal project is recommended to be unified into a qss stylesheet file is better, unified management.

Thank you for your reading, these are the contents of "what are the skills for the use of Qt?" after the study of this article, I believe you have a deeper understanding of what skills you have in the use of Qt, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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