QT 设置QLabel内容太长时使用省略号

不念不忘少年蓝@ 2022-10-05 09:46 680阅读 0赞

在使用QLabel时，文字长度超过控件长度会显示不完整，这时候一般采用的方案就是使用省略号替代超过的部分文字。

void AssetLibraryItem::setName(QString name)
    { 
    	QList<QLabel *> labels = findChildren<QLabel *>("label_asset_name");
    	for (auto it : labels)
    	{ 
    		QString newStr = name;
    		QFontMetrics fontWidth(it->font());//得到每个字符的宽度
    		QString elideNote = fontWidth.elidedText(newStr, Qt::ElideRight, 170);//最大宽度170px
    		it->setText(elideNote);//显示省略号的字符串
    		it->setToolTip(newStr);//设置tooltips
    	}
    	/*QLabel * label = findChild<QLabel *>("label_asset_name"); if (label) { label->setText(name); }*/
    }

关于 elidedText ：

QString QFontMetrics::elidedText(const QString &text, Qt::TextElideMode mode, int width, int flags = 0) const

If the string text is wider than width, returns an elided version of the string (i.e., a string with "..." in it). Otherwise, returns the original string.
    The mode parameter specifies whether the text is elided on the left (e.g., "...tech"), in the middle (e.g., "Tr...ch"), or on the right (e.g., "Trol...").
    The width is specified in pixels, not characters.
    The flags argument is optional and currently only supports Qt::TextShowMnemonic as value.
    The elide mark follows the layoutdirection. For example, it will be on the right side of the text for right-to-left layouts if the mode is Qt::ElideLeft, and on the left side of the text if the mode is Qt::ElideRight.

关于 QFontMetrics::elidedText 第二个参数（Qt::TextElideMode）的可选项：  
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