QSizeDemo.rar《Qt基础类05-尺寸类QSize》配套例程

/** ****************************************************************************** * @link https://blog.csdn.net/sy_lixiang * @author EMMA * @version V1.0.0 * @date 2024.09.13 * @brief 转载请注明出处 ****************************************************************************** */ #include "qsizedemo.h" #include <QIcon> #include <QGroupBox> #include "source/widget_btnqsize.h" #include "source/widget_btnqsize2.h" #include "source/widget_btnboundedto.h" #include "source/widget_btnexpandedto.h" #include "source/widget_btnheight.h" #include "source/widget_btnisempty.h" #include "source/widget_btnisnull.h" #include "source/widget_btnisvalid.h" #include "source/widget_btnrheight.h" #include "source/widget_btnrwidth.h" #include "source/widget_btnscale.h" #include "source/widget_btnscale2.h" #include "source/widget_btnscaled.h" #include "source/widget_btnscaled2.h" #include "source/widget_btnsetheight.h" #include "source/widget_btnsetwidth.h" #include "source/widget_btntocgsize.h" #include "source/widget_btntranspose.h" #include "source/widget_btntransposed.h" #include "source/widget_btnwidth.h" #include "source/widget_btnoperator1.h" #include "source/widget_btnoperator2.h" #include "source/widget_btnoperator3.h" #include "source/widget_btnoperator4.h" #include "source/widget_btnoperator5.h" #include "source/widget_btnoperator6.h" #include "source/widget_btnoperator7.h" #include "source/widget_btnoperator8.h" #include "source/widget_btnoperator9.h" #include "source/widget_btnoperator10.h" #include "source/widget_btnoperator11.h" #include "source/widget_btnoperator12.h" #include "source/widget_btnoperator13.h" QSizeDemo::QSizeDemo(QWidget *parent) : QWidget(parent) { //设置窗体标题 setWindowTitle(tr("CH2105，Qt基础类之QSize尺寸类")); //设置窗体图标 QString iconPath="E:\\Git-workdir\\learn_QT5\\learn_-qt5\\QT5\\CH21\\CH2105\\QSizeDemo\\"; QString iconFileName="application-one.png"; QString iconFullPath=iconPath+iconFileName; setWindowIcon(QIcon(iconFullPath)); //左侧GroupBox leftGroupBox=new QGroupBox(); leftGroupBox->setTitle(tr("成员函数")); //右上GroupBox rightTopGroupBox=new QGroupBox(); rightTopGroupBox->setTitle(tr("非成员函数")); //右下GroupBox rightBottomGroupBox=new QGroupBox(); rightBottomGroupBox->setTitle(tr("QSize帮助")); //左侧功能按钮设置 //成员函数按钮 btnQSize=new QPushButton(); btnQSize2=new QPushButton(); btnboundedTo=new QPushButton(); btnexpandedTo=new QPushButton(); btnheight=new QPushButton(); btnisEmpty=new QPushButton(); btnisNull=new QPushButton(); btnisValid=new QPushButton(); btnrheight=new QPushButton(); btnrwidth=new QPushButton(); btnscale=new QPushButton(); btnscale2=new QPushButton(); btnscaled=new QPushButton(); btnscaled2=new QPushButton(); btnsetHeight=new QPushButton(); btnsetWidth=new QPushButton(); btntoCGSize=new QPushButton(); btntranspose=new QPushButton(); btntransposed=new QPushButton(); btnwidth=new QPushButton(); btnoperator1=new QPushButton(); btnoperator2=new QPushButton(); btnoperator3=new QPushButton(); btnoperator4=new QPushButton(); btnQSize->setText(tr("QSize::QSize()")); btnQSize2->setText(tr("QSize::QSize(int width, int height)")); btnboundedTo->setText(tr("QSize QSize::boundedTo(const QSize &&otherSize) const")); btnexpandedTo->setText(tr("QSize QSize::expandedTo(const QSize &&otherSize) const")); btnheight->setText(tr("int QSize::height() const")); btnisEmpty->setText(tr("bool QSize::isEmpty() const")); btnisNull->setText(tr("bool QSize::isNull() const")); btnisValid->setText(tr("bool QSize::isValid() const")); btnrheight->setText(tr("int &&QSize::rheight()")); btnrwidth->setText(tr("int &&QSize::rwidth()")); btnscale->setText(tr("void QSize::scale(int width, int height, Qt::AspectRatioMode mode)")); btnscale2->setText(tr("void QSize::scale(const QSize &&size, Qt::AspectRatioMode mode)")); btnscaled->setText(tr("QSize QSize::scaled(int width, int height, Qt::AspectRatioMode mode) const")); btnscaled2->setText(tr("QSize QSize::scaled(const QSize &&s, Qt::AspectRatioMode mode) const")); btnsetHeight->setText(tr("void QSize::setHeight(int height)")); btnsetWidth->setText(tr("void QSize::setWidth(int width)")); btntoCGSize->setText(tr("CGSize QSize::toCGSize() const")); btntranspose->setText(tr("void QSize::transpose()")); btntransposed->setText(tr("QSize QSize::transposed() const")); btnwidth->setText(tr("int QSize::width() const")); btnoperator1->setText(tr("QSize &&QSize::operator*=(qreal factor)")); btnoperator2->setText(tr("QSize &&QSize::operator+=(const QSize &&size)")); btnoperator3->setText(tr("QSize &&QSize::operator-=(const QSize &&size)")); btnoperator4->setText(tr("QSize &&QSize::operator/=(qreal divisor)")); //右上功能按钮设置 //非成员函数按钮 btnoperator5=new QPushButton(); btnoperator6=new QPushButton(); btnoperator7=new QPushButton(); btnoperator8=new QPushButton(); btnoperator9=new QPushButton(); btnoperator10=new QPushButton(); btnoperator11=new QPushButton(); btnoperator12=new QPushButton(); btnoperator13=new QPushButton(); btnoperator5->setText(tr("bool operator!=(const QSize &&s1, const QSize &&s2)")); btnoperator6->setText(tr("const QSize operator*(const QSize &&size, qreal factor)")); btnoperator7->setText(tr("const QSize operator*(qreal factor, const QSize &&size)")); btnoperator8->setText(tr("const QSize operator+(const QSize &&s1, const QSize &&s2)")); btnoperator9->setText(tr("const QSize operator-(const QSize &&s1, const QSize &&s2)")); btnoperator10->setText(tr("const QSize operator/(const QSize &&size, qreal divisor)")); btnoperator11->setText(tr("QDataStream &&operator<<(QDataStream &&stream, const QSize &&size)")); btnoperator12->setText(tr("bool operator==(const QSize &&s1, const QSize &&s2)")); btnoperator13->setText(tr("QDataStream &&operator>>(QDataStream &&stream, QSize &&size)")); //多文本框设置 textEdit=new QTextEdit(); textEdit->setReadOnly(true); textEdit->setText(tr("帮助：")); textEdit->append(tr("")); textEdit->append(tr("1.QSize类使用整数点精度定义二维对象的大小。")); textEdit->append(tr("")); textEdit->append(tr("2.大小由width()和height()指定。它可以在构造函数中设置，并使用setWidth()， setHeight()或scale()函数或使用算术运算符进行更改。大小也可以通过使用rwidth()和rheight()函数检索对宽度和高度的引用来直接操作。最后，宽度和高度可以使用转置()函数进行交换。")); textEdit->append(tr("")); textEdit->append(tr("3.isValid()函数的作用是:确定一个大小是否有效(一个有效的大小的宽度和高度都大于等于零)。isEmpty()函数在宽度和高度中的任何一个小于或等于零时返回true，而isNull()函数仅在宽度和高度都为零时返回true。")); textEdit->append(tr("")); textEdit->append(tr("4.使用expandedTo()函数来检索保存该大小和给定大小的最大高度和宽度的大小。类似地，boundedTo()函数返回一个大小，该大小包含该大小和给定大小的最小高度和宽度。")); textEdit->append(tr("")); textEdit->append(tr("5.QSize对象可以流化也可以比较。")); textEdit->append(tr("")); /*********左侧布局*********/ leftLayout=new QVBoxLayout; leftLayout->addWidget(btnQSize); leftLayout->addWidget(btnQSize2); leftLayout->addWidget(btnboundedTo); leftLayout->addWidget(btnexpandedTo);