}classWidget :publicQWidget { Q_OBJECTpublic:explicitWidget(QWidget *parent =0);~Widget();privateslots:voidon_pushButton_clicked();voidnewConnection();voidreadMessage();voidsendMessage();voiddisplayError(QAbstractSocket::SocketError); private: Ui::Widget*ui; QTcpSocket*tcpSocket; QString message...
If I want to write the widget in the main.cpp, what should I do? This is my code. #include <QApplication> #include <QWidget> class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = 0); ~Widget(); }; Widget::Widget(QWidget *parent) : QWidget(parent) { }...
}classDialog:publicQDialog { Q_OBJECTpublic:Dialog(QWidget *parent =0); ~Dialog();private: Ui::Dialog *ui; };#endif// DIALOG_H dialog.cpp #include"dialog.h"#include"ui_dialog.h"Dialog::Dialog(QWidget *parent) :QDialog(parent),ui(newUi::Dialog) { ui->setupUi(this);//QObject::...
这段代码是一个主窗口类MainWindow的定义,继承自QMainWindow。其中包含了一些私有成员变量和槽函数。让我逐句解释给你听。 classMainWindow:publicQMainWindow { Q_OBJECT public: MainWindow(QWidget*parent=nullptr); ~MainWindow(); private: //枚举类型treeItemType,创建节点时用作Type参数,自定义类型必须大于1000 ...
Q_OBJECT宏直接用默认的,不用修改。写了这个宏,就支持了Qt中的信号和槽机制MyWideget(QWidget *parent = 0)里面的默认构造函数为0,就是基类的parent为0. 注意:类名里的冒号是继承。classMyWidget : public QMainWindow 构造函数里的冒号是初始化, 下面是QT中常见的快捷键 ...
class MyWidget : public QWidget { Q_OBJECT public: explicit MyWidget(MyWidget* widget, QWidget* parent = 0); private: some_class obj1; some_class obj2; }; and the constructor code as this: MyWidget::MyWidget(MyWidget* widget, QWidget *parent) : QWidget(parent), ui(new Ui::My...
class MyWidget:public QWidget { Q_OBJECT 公众: 进myWidget(); signals: void buttonClicked(); 私人: QPushButton * myButton; }; MyWidget :: MyWidget() { myButton = new QPushButton(this); connect(myButton , SIGNAL(clicked()), this , SIGNAL(buttonClicked())); } ...
QWidget *parent = nullptr is the parent of the new widget. If it is nullptr (the default), the new widget will be a window. If not, it will be a child of parent, and be constrained by parent's geometry (unless you specify Qt::Window as window flag). Qt::WindowFlags f = { ...
class MyWidget : public QWidget { Q_OBJECT public: MyWidget(); signals: void myUsefulSignal(); private: QPushButton *aButton; }; MyWidget::MyWidget() { aButton = new QPushButton( this ); connect( aButton, SIGNAL(clicked()), SIGNAL(myUsefulSignal()) ); } ...
Qt 里经常见 #include 和 class QXXX。前者是包含头文件,头文件中一般来说包含了 QXXX 类的定义,编译代码时预处理器要做 include 头文件的...