Qt QScrollArea and layout in code
Qt QScrollArea and layout in code 一、参考文档: 1. Qt 第六章 QScrollArea类给QWidget添加滚动条 http://blog.csdn.net/commshare/article/details/6753978 2. 24小时学会QT编程──窗口的缩放和滚动条的使用 http://blog.163.com/vic_kk/blog/static/4947052420083308325238/ 3. QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout http://blog.csdn.net/zhuyingqingfen/article/details/6562246 4. QWidget::setLayout: Attempting to set QLayout "" on MainWindow "", which already has a layout http://yebaoshan.blog.163.com/blog/static/20423116720126267524060/ 二、cat main.cpp #include "mainwindow.h" #include <QApplication> #include <QScrollArea> int main(int argc, char *argv[]) { QApplication a(argc, argv); MainWindow mainWindow; // 加入滚动条 QScrollArea scrollArea; scrollArea.setWidget(&mainWindow); scrollArea.show(); return a.exec(); } 三、cat mainwindow.cpp #include "mainwindow.h" #include <QSize> #include <QPushButton> #include <QHBoxLayout> #include <QTextEdit> #include <QWidget> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { // 设置大小 this->setMinimumSize(QSize(300, 300)); this->setMaximumSize(QSize(300, 300)); // 设置标题 this->setWindowTitle("About"); QPushButton *button = new QPushButton("zengjf"); QTextEdit *leftEdit = new QTextEdit(this); QTextEdit *rightEdit = new QTextEdit(this); QHBoxLayout *layout = new QHBoxLayout(this); layout->addWidget(leftEdit); layout->addWidget(button); layout->addWidget(rightEdit); QWidget *widget = new QWidget(this); widget->setLayout(layout); setCentralWidget(widget); } MainWindow::~MainWindow() { }