Qt---ToolBox自由伸展

参考:Qt实战12.可自由展开的ToolBox - Qt小罗 - 博客园 (cnblogs.com)  

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    setWindowTitle(QStringLiteral("自定义ToolBox演示  Qt小罗"));
    setMinimumSize(300, 400);
    resize(300, 450);
    QLabel *label[4];
    for(int i = 0; i < 4; i++){
        label[i] = new QLabel;
        label[i]->setFixedSize(300, 200);
    }
    label[0]->setStyleSheet("QLabel{background-color:red;}");
    label[1]->setStyleSheet("QLabel{background-color:green;}");
    label[2]->setStyleSheet("QLabel{background-color:blue;}");
    label[3]->setStyleSheet("QLabel{background-color:black;}");

    ToolBox *toolBox = new ToolBox(this);
    toolBox->addWidget(QStringLiteral("Qt小罗Box1"), label[0]);
    toolBox->addWidget(QStringLiteral("Qt小罗Box2"), label[1]);
    toolBox->addWidget(QStringLiteral("Qt小罗Box3"), label[2]);
    toolBox->addWidget(QStringLiteral("Qt小罗Box4"), label[3]);

    setCentralWidget(toolBox);
}

#ifndef TOOLBOX_H
#define TOOLBOX_H

#include <QWidget>
#include <QScrollArea>
#include <QVBoxLayout>
#include "toolpage.hpp"

class QVBoxLayout;
class ToolBox : public QWidget
{
    Q_OBJECT

private:
    QVBoxLayout *m_pContentVBoxLayout;
    QScrollArea *scrollArea;

public:
    explicit ToolBox(QWidget *parent = nullptr)
        : QWidget(parent)
    {
        QWidget *widget = new QWidget(this);

        scrollArea = new QScrollArea(this);
        scrollArea->setWidgetResizable(true);

        QVBoxLayout *outerLayout = new QVBoxLayout(this);
        outerLayout->setSpacing(0);
        outerLayout->setContentsMargins(0, 0, 0, 0);
        outerLayout->addWidget(scrollArea);
        this->setLayout(outerLayout);
        scrollArea->setWidget(widget);

        m_pContentVBoxLayout = new QVBoxLayout;
        m_pContentVBoxLayout->setSpacing(2);
        m_pContentVBoxLayout->setContentsMargins(0, 0, 0, 0);

        QVBoxLayout *innerLayout = new QVBoxLayout(widget);
        innerLayout->setSpacing(2);
        innerLayout->setContentsMargins(0, 0, 0, 0);
        innerLayout->addLayout(m_pContentVBoxLayout);
        innerLayout->addStretch(1);
    }

    void addWidget(const QString &title, QWidget *widget)
    {
        m_pContentVBoxLayout->addWidget(new ToolPage(title, widget, this));
    }

};

#endif // TOOLBOX_H

#ifndef TOOLPAGE_H
#define TOOLPAGE_H

#include <QWidget>
#include <QPushButton>
#include <QVBoxLayout>

namespace Ui {
class ToolPage;
}

class QFormLayout;
class QLabel;

class ToolPage : public QWidget
{
    Q_OBJECT

private:
    QVBoxLayout *widgetLayout;
    QWidget *widgetContent;
    QPushButton *pushButtonFold;

public:
    explicit ToolPage(const QString &title, QWidget *widget, QWidget *parent = nullptr)
        : QWidget(parent)
    {
        widgetContent = new QWidget(this);
        widgetContent->hide();
        widgetLayout = new QVBoxLayout(widgetContent);
        widgetLayout->setContentsMargins(0, 0, 0, 0);
        widgetLayout->setSpacing(0);

        pushButtonFold = new QPushButton(this);
        pushButtonFold->setMinimumHeight(26);

        QVBoxLayout *mainLayout = new QVBoxLayout(this);
        mainLayout->addWidget(pushButtonFold);
        mainLayout->addWidget(widgetContent);
        mainLayout->setSpacing(0);
        mainLayout->setContentsMargins(0, 0, 0, 0);
        connect(pushButtonFold, &QPushButton::clicked, this, [=](){
            widgetContent->setVisible(!widgetContent->isVisible());
        });
        pushButtonFold->setText(title);
        widgetLayout->addWidget(widget);
    }

private:
    void addWidget(const QString &title, QWidget *widget)
    {
        pushButtonFold->setText(title);
        widgetLayout->addWidget(widget);
    }



};

#endif // TOOLPAGE_H