confused php regular expression
I had a case to use regexp to match unicode codes of chinese characters. The unicode codes are of the form \uxxxx where x is hexidecimal digit. To match them, […]
php string
In a php file, you can define a string using ” ” or ‘ ‘. You specify what characters the string consists of in between ‘ ‘ or ” “such […]
Problem when Capturing Screen of Web Page using QWebView
The following code can print the current web page to an image. page()->setViewportSize(page()->mainFrame()->contentsSize()); QImage *image=new QImage(page()->mainFrame()->contentsSize(), QImage::Format_ARGB32); QPainter *painter = new QPainter(image); page()->mainFrame()->render(painter); image->save(QString(“images/%1.png”).arg(name)); However there are some issues […]
How to open links on new window in QWebView?
By default, if you click a link on a QWebView window, QWebView will open the url in its own window if the link has not a target=”_blank” attribute, and do […]
Debug QWebView::load() error
Today, when I opened one of my qt program(normally this program will open a website on its GUI), I found it could not load and display the website as usual. […]
QFileInfo directory name
Although it is called QFileInfo, QFileInfo not only handle files but also directories. This function is often used to traverse all items under a directory including files and sub-directories. QFileInfo::fileName() […]
How to get QWebFrame for iframe?
You may think it is easy to get the QWebFrame object for an iframe element in a web page since QWebFrame is formed by iframe/frame(http://doc.qt.io/qt-5/qwebview.html) and there must be a […]
How to get text in textarea for QWebElement?
To obtain the text on a textarea element, you may think about using QWebElement::attribute(“value”) because the text seems to be the value of the textarea element. But actually what is […]
css div size and img size
You must have encountered such case that an image is larger than its container div and can not be restricted in the div area. <div><img src=”image.png” alt=”” /></div> In the […]
QFileDialog bug
It seems QFileDialog::ShowDirsOnly does not work. It is intended to show directories only. But it actually shows both files and directories. The Qt official document talks about two options related […]