我想在QGroupBox中有一个QScrollArea,所以当我向组合框添加新的小部件时,它的大小保持不变,但我有滚动条而不是调整组框本身 .
这是我的代码:
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtCore>
#include <QtGui>
#include <QLayout>
#include <QScrollArea>
#include <QGroupBox>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QGroupBox *box = new QGroupBox(QObject::tr("Example"));
QScrollArea *sa = new QScrollArea;
QGridLayout *gridLayout = new QGridLayout;
QPushButton *b1 = new QPushButton("A");
QPushButton *b2 = new QPushButton("B");
QPushButton *b3 = new QPushButton("C");
QPushButton *b4 = new QPushButton("D");
QPushButton *b5 = new QPushButton("E");
QPushButton *b6 = new QPushButton("F");
QPushButton *b7 = new QPushButton("F");
QPushButton *b8 = new QPushButton("F");
QPushButton *b9 = new QPushButton("F");
// addWidget(*Widget, row, column, rowspan, colspan)
// 0th row
gridLayout->addWidget(b1,0,0,1,1);
gridLayout->addWidget(b2,0,1,1,1);
gridLayout->addWidget(b3,0,2,1,1);
// 1st row
gridLayout->addWidget(b4,1,0,1,1);
// 2nd row with 2-column span
gridLayout->addWidget(b5,2,0,1,2);
// 3rd row with 3-column span
gridLayout->addWidget(b6,3,0,1,3);
gridLayout->addWidget(b7,4,0,1,3);
gridLayout->addWidget(b8,5,0,1,3);
gridLayout->addWidget(b9,6,0,1,3);
box->setLayout(gridLayout);
sa->setWidget(box);
setCentralWidget(sa);
}
MainWindow::~MainWindow()
{
delete ui;
}
我现在拥有的是每次添加新的QPushButton时,QGroupBox会调整大小,不会有QScrollArea . 我应该改变什么才能拥有我想要的行为?可能吗?
1 回答
那是因为你将组合框放在滚动区域内 . 滚动区域不限制其儿童的大小 .
你应该做相反的事情,把scrollarea放在组合框中 . 这是怎么回事;
请注意,如果您使用切换按钮(例如单选按钮),则它们不会充当组 . 因为从技术上讲它们不再在同一个QGroupBox中 - 它们位于滚动区域内 . 您可以使用
QButtonGroup
实例提供组行为 .