文章目录QT_QT布局常用类QStackedWidget与QLayout类QLayout类(基本布局)继承体系布局案例QStackenWidget类(堆栈窗体)继承体系示例QT_QT布局常用类QStackedWidget与QLayout类QLayout类(基本布局)继承体系QLayout 是所有布局管理器的基类它继承自 QObject而非 QWidget。整体继承关系如下QObject └── QLayout// 所有布局管理器的基类├── QBoxLayout// 线性布局抽象基类│ ├── QHBoxLayout// 水平排列│ └── QVBoxLayout// 垂直排列├── QGridLayout// 网格布局二维├── QFormLayout// 表单布局标签 输入框└── QStackedLayout// 堆叠布局同一区域切换控件布局案例#includedialog.hDialog::Dialog(QWidget*parent):QDialog(parent){setWindowTitle(员工信息);// 左边控件UserNumbernewQLabel(员工编号);UserNumberEditnewQLineEdit;UserNamenewQLabel(员工姓名);UserNameEditnewQLineEdit;//(this)UserSexnewQLabel(员工性别);UserSexComboxnewQComboBox;UserSexCombox-addItem(男);UserSexCombox-addItem(女);UserDepartnewQLabel(所在部门);UserDepartEditnewQTextEdit;UserAgenewQLabel(员工年龄);UserAgeEditnewQLineEdit;// 右边控件topRightLayoutnewQHBoxLayout();topRightLayout-setSpacing(25);MySelfInfonewQLabel(个人简历);MyselfInfoTextEditnewQTextEdit;rightlayoutnewQVBoxLayout();rightlayout-addLayout(topRightLayout);rightlayout-addWidget(MySelfInfo);rightlayout-addWidget(MyselfInfoTextEdit);// 右边下部分// QPushButton *okBtn,*cancelBtn;// QHBoxLayout *buttomLayout;okBtnnewQPushButton(保存);cancelBtnnewQPushButton(退出);buttomLayoutnewQHBoxLayout();buttomLayout-addStretch();buttomLayout-addWidget(okBtn);buttomLayout-addWidget(cancelBtn);//网格布局lLayoutnewQGridLayout();lLayout-addWidget(UserNumber,0,0);lLayout-addWidget(UserNumberEdit,0,1);lLayout-addWidget(UserName,1,0);lLayout-addWidget(UserNameEdit,1,1);lLayout-addWidget(UserSex,2,0);lLayout-addWidget(UserSexCombox,2,1);lLayout-addWidget(UserDepart,3,0);lLayout-addWidget(UserDepartEdit,3,1);lLayout-addWidget(UserAge,4,0);lLayout-addWidget(UserAgeEdit,4,1);lLayout-setColumnStretch(0,1);lLayout-setColumnStretch(1,3);QGridLayout*mlayoutnewQGridLayout(this);mlayout-setMargin(20);mlayout-setSpacing(10);mlayout-addLayout(lLayout,0,0);mlayout-addLayout(rightlayout,0,1);mlayout-addLayout(buttomLayout,1,0,1,2);mlayout-setSizeConstraint(QLayout::SetFixedSize);}Dialog::~Dialog(){}QStackenWidget类(堆栈窗体)QStackedWidget 是 Qt 中用于实现多页面切换的容器控件。它在同一区域放置多个子控件页面但同一时刻只显示其中一个常用于实现选项卡、向导、设置页面等场景。继承体系QObjectQWidget └── QFrame └── QStackedWidget └── 内部使用 QStackedLayout 实现QStackedWidget 本质上是对 QStackedLayout 的封装提供了更便捷的 Widget 级操作接口。示例#includestackeddlg.h#includeQHBoxLayoutstackedDlg::stackedDlg(QWidget*parent):QDialog(parent){setWindowTitle(堆栈窗体测试);qlistnewQListWidget(this);qlist-insertItem(0,Linux1);qlist-insertItem(1,Linux2);qlist-insertItem(2,Linux3);qlist-insertItem(3,Linux4);qlist-insertItem(4,Linux5);lab1newQLabel(linux1 QT);lab2newQLabel(linux2 QT);lab3newQLabel(linux3 QT);lab4newQLabel(linux4 QT);lab5newQLabel(linux5 QT);statcksnewQStackedWidget(this);statcks-addWidget(lab1);statcks-addWidget(lab2);statcks-addWidget(lab3);statcks-addWidget(lab4);statcks-addWidget(lab5);QHBoxLayout*mlayoutnewQHBoxLayout(this);mlayout-setMargin(10);mlayout-setSpacing(20);mlayout-addWidget(qlist);mlayout-addWidget(statcks,0,Qt::AlignCenter);mlayout-setStretchFactor(qlist,1);mlayout-setStretchFactor(statcks,2);// 连接信号与槽connect(qlist,QListWidget::currentRowChanged,statcks,QStackedWidget::setCurrentIndex);}stackedDlg::~stackedDlg(){}
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