水平平铺包含QScrollArea的QMdiArea子窗口

问题描述

以下代码（mainwindow.cpp）是我的问题的简化版本。我试图水平平铺qmdiarea子窗口，但是不知何故子窗口没有完全显示-这些子窗口底部的水平滚动条没有正确显示。在我看来，问题出在高度设置代码-如果我放大主窗口（不将平铺代码置于resize事件中），则子窗口显示为OK。所以我想解决方案将是找出合适的高度。但是，如何？

#include "mainwindow.h"
#include "ui_mainwindow.h"

// CODE added to the generated =========================================
#include <qmdiarea>
#include <QDebug>
#include <qgridLayout>
#include <QScrollArea>
#include <QScrollBar>
#include <QLabel>
#include <QString>
#include <QMdisubWindow>
// CODE END=========================================

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent),ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // CODE added to the generated =========================================
    qmdiarea *mdiArea = new qmdiarea;
    this->setCentralWidget(mdiArea);

    QLabel *lable1 = new     QLabel(QString("01234567890123456789012345678901234567890123456789012345678901234567890123456789    01234567890123456789012345678901234567890123456789012345678901234567890123456789"));
    QScrollArea *scrollArea1 = new QScrollArea;
    scrollArea1->setWidget(lable1);
    qgridLayout *grid1 = new qgridLayout;
    grid1->addWidget(scrollArea1);
    QWidget *widget1 = new QWidget;
    widget1->setLayout(grid1);
    mdiArea->addSubWindow(widget1,Qt::FramelessWindowHint);


    QLabel *lable2 = new     QLabel(QString("01234567890123456789012345678901234567890123456789012345678901234567890123456789    01234567890123456789012345678901234567890123456789012345678901234567890123456789"));
    QScrollArea *scrollArea2 = new QScrollArea;
    scrollArea2->setWidget(lable2);
    qgridLayout *grid2 = new qgridLayout;
    grid2->addWidget(scrollArea2);
    QWidget *widget2 = new QWidget;
    widget2->setLayout(grid2);
    mdiArea->addSubWindow(widget2,Qt::FramelessWindowHint);

    // horizontally tile the above widget1&2
    int subWidth = this->width() / mdiArea->subWindowList().count();
    int x = 0;
    for(auto sub : mdiArea->subWindowList()) {
        sub->resize(subWidth,height()); // what kind of height Could let the whole sub windows including horizontal scrollbars show?
        sub->move(x,0);
        x += subWidth;
    }
    // CODE END=========================================
}

MainWindow::~MainWindow()
{
    delete ui;
}

谢谢。

解决方法

万一有人遇到这种情况：QMdiArea :: tileSubWindows（）可以解决问题。

mdiArea->tileSubWindows();