设计人员如何创建Line小部件? [英] How does designer create a Line widget?

问题描述

在Qt Designer中，您可以拖动线"小部件，这将在您的布局中创建线.

In Qt Designer , you can drag a "Line" widget , which will create a line in your layout.

但是我检查了文档和标题，但是找不到"Line"标题/小部件，这是什么?

But I checked the document and headers , I didn't find the "Line" header / widget , what was it ?

推荐答案

在Qt 5.7中，由Qt Designer生成的用于水平线的代码(可以在菜单中使用表单/查看代码..."进行检查) :

In Qt 5.7 the code generated by Qt Designer for a Horizontal Line (which can be checked in the menu using "Form/View Code...") is:

QFrame *line;
line = new QFrame(Form);
line->setFrameShape(QFrame::HLine);
line->setFrameShadow(QFrame::Sunken);

这将创建您在Qt Designer中看到的行.

This will create the lines you see in Qt Designer.

当前答案似乎没有给出可行的解决方案，这是所有答案的比较(此解决方案为第一行):

The current answers do not seem to give working solutions, here is a comparison of all answers (this solution is the first line):

完整代码:

#include <QtWidgets>

int main(int argc, char **argv) 
{
  QApplication app(argc, argv);

  QWidget widget;
  auto layout = new QVBoxLayout;
  widget.setLayout(layout);
  widget.resize(200, 200);

  auto lineA = new QFrame;
  lineA->setFrameShape(QFrame::HLine);
  lineA->setFrameShadow(QFrame::Sunken);
  layout->addWidget(lineA);

  QWidget *lineB = new QWidget;
  lineB->setFixedHeight(2);
  lineB->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
  lineB->setStyleSheet(QString("background-color: #c0c0c0;"));
  layout->addWidget(lineB);

  auto lineC = new QFrame;
  lineC->setFixedHeight(3);
  lineC->setFrameShadow(QFrame::Sunken);
  lineC->setLineWidth(1);
  layout->addWidget(lineC);

  QFrame* lineD = new QFrame;
  lineD->setFrameShape(QFrame::HLine);
  layout->addWidget(lineD);

  widget.show();
  return app.exec();
}

这篇关于设计人员如何创建Line小部件?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！