如何在Qt5中正确使用QGridLayout将Widgets彼此相邻添加答案

【问题标题】：How to properly use QGridLayout to addWidgets next to each other in Qt5如何在Qt5中正确使用QGridLayout将Widgets彼此相邻添加
【发布时间】：2019-06-15 14:24:37
【问题描述】：

我在尝试将两个布局并排放置时遇到了一个小问题。

我目前的实际结果如下：

但它应该如下所示：

我错过了什么？

在我为此使用的小sn-p代码下方：

MyViz::MyViz(QWidget *parent) : QWidget(parent)
{

//  Qt Components set up......

QGridLayout* control_layout = new QGridLayout();
control_layout->addWidget(thickness_label, 0, 0);
control_layout->addWidget(thickness_slider, 0, 1);
control_layout->addWidget(cell_size_label, 1, 0);
control_layout->addWidget(cell_size_slider, 1, 1);

control_layout->addWidget(thickness_label_second_renderer, 0, 2);
control_layout->addWidget(thickness_slider_second_renderer, 0, 3);
control_layout->addWidget(cell_size_second_renderer_label, 1, 2);
control_layout->addWidget(cell_size_second_renderer_slider, 1, 3);


// construct lay-out and render panels next to each other
render_panel = new rviz::RenderPanel();
render_panel2 = new rviz::RenderPanel();

QVBoxLayout* main_layout = new QVBoxLayout;
main_layout->addLayout(control_layout);
main_layout->addWidget(render_panel);
main_layout->addWidget(render_panel2);

// set the top-leve layout for this MyViz widget
setLayout(main_layout);

// other operation....

}

【问题讨论】：

标签： c++11 qt5 qgridlayout qvboxlayout

【解决方案1】：

问题是您正在创建一个QVBoxLayout（“V”表示垂直）并将您的QGridLayout 和RenderPanel 实例放入其中。把所有东西都放在QGridLayout...

MyViz::MyViz(QWidget *parent) : QWidget(parent)
{

    //  Qt Components set up......

    QGridLayout* control_layout = new QGridLayout();
    control_layout->addWidget(thickness_label, 0, 0);
    control_layout->addWidget(thickness_slider, 0, 1);
    control_layout->addWidget(cell_size_label, 1, 0);
    control_layout->addWidget(cell_size_slider, 1, 1);

    control_layout->addWidget(thickness_label_second_renderer, 0, 2);
    control_layout->addWidget(thickness_slider_second_renderer, 0, 3);
    control_layout->addWidget(cell_size_second_renderer_label, 1, 2);
    control_layout->addWidget(cell_size_second_renderer_slider, 1, 3);


    // construct lay-out and render panels next to each other
    render_panel = new rviz::RenderPanel();
    render_panel2 = new rviz::RenderPanel();

    /*
     * At this point the QGridLayout has 4 occupied columns.  Make
     * each rviz::RenderPanel instance span 2 columns.
     */
    control_layout->addWidget(render_panel,  2, 0, 1, 2);
    control_layout->addWidget(render_panel2, 2, 2, 1, 2);

    // set the top-level layout for this MyViz widget
    setLayout(control_layout);

    // other operation....

}

注意传递给QGridLayout::addWidget的第4个和第5个参数分别是行和列跨度。

【讨论】：