Qt 布局管理之 堆栈窗体

//
// Created by simp on 2022/3/29.
//
#ifndef STACKEDWIDGET_STACKDLG_H
#define STACKEDWIDGET_STACKDLG_H
#include <QListWidget>
#include <QString>
#include <QDialog>
#include <QStackedWidget>
#include <QLabel>
class StackDlg :public QDialog{
Q_OBJECT
public:
    explicit StackDlg(QWidget *parent=0);
    ~StackDlg() override;
private:
    QListWidget *list;
    QStackedWidget *stack;
    QLabel *label1;
    QLabel *label2;
    QLabel *label3;
};
#endif //STACKEDWIDGET_STACKDLG_H

//
// Created by simp on 2022/3/29.
//
#include "StackDlg.h"
#include <QHBoxLayout>
StackDlg::StackDlg(QWidget *parent): QDialog(parent) {
    setWindowTitle(tr("StackedWidget"));
list = new QListWidget(this);//新建一个QListWidget控件对象
//新建的QListWidget控件中插入三个条目 作为选择项
list->insertItem(0, tr("Window1"));
list->insertItem(1, tr("Window2"));
list->insertItem(2, tr("Window3"));
//创建三个QLabel标签控件对象，作为堆栈窗体需要显示的三层窗体
    label1 = new QLabel(tr("WindowTest1"));
    label2 = new QLabel(tr("WindowTest2"));
    label3 = new QLabel(tr("WindowTest3"));
//新建一个QStackWidget堆栈窗口对象
stack = new QStackedWidget(this);
//将创建的三个label标签控件一次插入到堆栈窗口中
stack->addWidget(label1);
stack->addWidget(label2);
stack->addWidget(label3);
auto *mainLayout = new QHBoxLayout(this);
//对整个对话窗体进行布局
    mainLayout->setMargin(5);//设置对话窗体之间的边距为5
    mainLayout->setSpacing(5);//设定各个控件之间的间距为5
    mainLayout->addWidget(list);
    mainLayout->addWidget(stack,0,Qt::AlignCenter);
    mainLayout->setStretchFactor(list,1);
    mainLayout->setStretchFactor(stack,3);
    connect(list, SIGNAL(currentRowChanged(int)),stack, SLOT(setCurrentIndex(int)));
}
StackDlg::~StackDlg() {
}

#include <QApplication>
#include <QDebug>
#include "StackDlg.h"
int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    StackDlg w;
    w.show();
return a.exec();
}