QLabel
The QLabel widget provides a text or image display.
可以显示的文本
void clear()
void setMovie(QMovie *movie)
void setNum(
int num)
void setNum(
double num)
void setPicture(
const QPicture &picture)
void setPixmap(
const QPixmap &)
void setText(
const QString &)
属性的设置
函数描述
setScaledContents(bool)自动适应大小void setIndent(int)文本缩进几个像素单位void setMargin(int)边距void setOpenExternalLinks(bool open)可以打开链接void setAlignment(Qt::Alignment)对齐方式void QLabel::setSelection(int start, int length)选择void setTextFormat(Qt::TextFormat)文本格式void setWordWrap(bool on)自动显示全部
还有许多继承的东西,size,font,style等
判断
函数描述
hasSelectedText()判断文本是否被选择hasScaledContents()是否自动适应大小
值利用
函数描述
int QLabel::selectionStart() const选中文本的第一个char
事件
virtual void changeEvent(QEvent *ev)
override
virtual void contextMenuEvent(QContextMenuEvent *ev)
override
virtual bool event(QEvent *e)
override
virtual void focusInEvent(QFocusEvent *ev)
override
virtual bool focusNextPrevChild(
bool next)
override
virtual void focusOutEvent(QFocusEvent *ev)
override
virtual void keyPressEvent(QKeyEvent *ev)
override
virtual void mouseMoveEvent(QMouseEvent *ev)
override
virtual void mousePressEvent(QMouseEvent *ev)
override
virtual void mouseReleaseEvent(QMouseEvent *ev)
override
virtual void paintEvent(QPaintEvent *)
override
例子
#include "mywidget.h"
#include<QTextEdit
>
#include<QVBoxLayout
>
#include<QString
>
#include<QLabel
>
#include<QPixmap
>
#include<QMovie
>
mywidget
::mywidget()
{
setWindowTitle(
"my widget test");
QVBoxLayout
*layout
=new QVBoxLayout(this);
QLabel
*mylabel
=new QLabel;
mylabel
->setText(
"<p style=\"line-height:200%\">hello the world nihao<p>");
mylabel
->setAlignment(Qt
::AlignRight);
mylabel
->setWordWrap(
true);
mylabel
->setLineWidth(
30);
QString strHTML
= QString(
"<html> \
<head> \
<style> \
font{color:red;} #f{font-size:18px; color: green;} \
</style> \
</head> \
<body>\
<font>%1</font><font id=\"f\">%2</font> \
<br/><br/> \
<img src=\":/image/wz2.jpg\" width=\"100\" height=\"100\"> \
</body> \
</html>")
.arg(
"I am a ")
.arg(
"Qter");
mylabel
->setText(strHTML);
QPixmap mypixmap(
":/image/wz2.jpg");
mylabel
->setScaledContents(
true);
mylabel
->setPixmap(mypixmap);
QMovie
*mymovie
=new QMovie(
":/image/c++猿");
mylabel
->setMovie(mymovie);
mymovie
->start();
mylabel
->setText(QString(
"<a href = \"%1\">%2</a>")
.arg(
"www.baidu.com")
.arg(QStringLiteral(
"百度")));
mylabel
->setOpenExternalLinks(
true);
layout
->addWidget(mylabel);
this
->show();
}
