QT 中QSplitter实现界面拖拽

 通过拖拽下图红框,可以实现左右拖动窗口大小,同时自动生成滚动条

 

为了实时更新,此处重写了 showEvent 和 resizeEvent 函数  通过 setSizes 函数更改界面大小

 

 

 

 

 

 

 若想要隐藏数据,直接让一方hide就可以了如下

 

 

 

 

    //拖动
    if(true){
        QSplitter* splitter=new QSplitter(ui->groupBox__bm_set);
        splitter->addWidget(ui->groupBox__tree_set);
        splitter->addWidget(ui->table_setting);
        splitter->setOrientation(Qt::Horizontal);
        splitter->setOpaqueResize(true);//实时显示
        QList<int> li;li.append(231);li.append(ui->groupBox__bm_set->width()-231);
        splitter->setSizes(li);
        splitter->setChildrenCollapsible(false);//子窗口不折叠

        QGridLayout* layout=new QGridLayout(ui->groupBox__bm_set);
        layout->setObjectName("layout__groupBox__bm_set");
        layout->setSpacing(6);
        layout->setContentsMargins(0,0,0,0);
        layout->addWidget(splitter,23,0,1,1);
    }

 

 

void MainWindow::changeEvent(QEvent *event)
{
    if(event->type()!=QEvent::WindowStateChange) return;
    if(this->windowState()==Qt::WindowMaximized)//最大化事件
    {
       QSplitter* splitter = (QSplitter*)ui->groupBox__tree_set->parent();
       QList<int> li;li.append(331);li.append(ui->groupBox__bm_set->width()-331);
       splitter->setSizes(li);
    }
}

 

 

QList<int> li;li<<100000<<300000;//比例进行//尽量大
splitter->setSizes(li);

 

 

// 2023.10.19 使用中最大最小化发现问题,此处提供一个一个完整的解决方案

注意  针对 QStackedWidget 使用时, 需要针对子page进行操作

    //拖动 #include <QSplitter>
    if(true){
        QSplitter* splitter=new QSplitter(ui->stackedWidget_page);
        splitter->addWidget(ui->group__control);
        splitter->addWidget(ui->group__filtration);
        splitter->setOrientation(Qt::Horizontal);
        splitter->setOpaqueResize(true);//实时显示
        QList<int> li;li.append(ui->group__control->width());li.append(ui->group__filtration->width());//均分,实际情况是,UI会根据最小值自动调整
        splitter->setSizes(li);
        splitter->setChildrenCollapsible(false);//子窗口不折叠

        QGridLayout* layout=new QGridLayout(ui->stackedWidget_page);
        layout->setObjectName("layout__groupBox__stackedWidget");
        layout->setSpacing(6);
        layout->setContentsMargins(0,0,0,0);
        layout->addWidget(splitter,23,0,1,1);
    }

 

一个简单的技巧,恢复最小值

  this->resize(100,100);//设置为最小

 

此处提供一种解决方案,隐藏同时,修改窗口大小

//动态修改窗口大小
void MainWindow::on_data_filtration_clicked()
{
    if(ui->data_filtration->isChecked()==false){//隐藏
        this->setMinimumWidth(ui->group__control->minimumWidth()+20);
        this->resize(this->size().width()-ui->group__filtration->size().width(),this->size().height());
        ui->group__filtration->hide();
    }
    else {//显示
        int filtration_w1=ui->group__filtration->size().width();
        if(filtration_w1<=0){
            filtration_w1=ui->group__filtration->minimumWidth();
        }
        this->resize(this->size().width()+filtration_w1,this->size().height());
        ui->group__filtration->show();
        int filtration_w2=ui->group__filtration->size().width();
        this->resize(this->size().width()+filtration_w2-filtration_w1,this->size().height());
        ui->data_filtration_radio_continue->setChecked(true);
        ui->data_filtration_radio_stop->setChecked(false);
//        myDebug;
//        myDebugNum(this->size().width());
//        myDebugNum(ui->group__filtration->size().width());
        this->setMinimumWidth(ui->group__control->minimumWidth()+20+ui->group__filtration->minimumWidth()+30);
    }
}

 

 

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