Returns the compression type that this resource is compressed with, if any. If it is not compressed, this function returns QResource::NoCompression. If this function returns QResource::ZlibCompression , you may decompress the data using the qUncompress function.
Up until Qt 5. Qt does not provide a wrapper. Returns direct access to a segment of read-only data, that this resource represents. If the resource is compressed, the data returned is also compressed. The caller must then decompress the data or use uncompressedData. If the resource is a directory, nullptr is returned. See also uncompressedData , size , and isFile. Returns the full path to the file that this QResource represents as it was passed.
See also setFileName and absoluteFilePath. Returns true if the resource represents a directory and thus may have children in it, false if it represents a file. Returns true if the resource represents a file and thus has data backing it, false if it represents a directory. Returns true if the resource really exists in the resource hierarchy, false otherwise.
Registers the resource with the given rccFileName at the location in the resource tree specified by mapRoot , and returns true if the file is successfully opened; otherwise returns false. Registers the resource with the given rccData at the location in the resource tree specified by mapRoot , and returns true if the file is successfully opened; otherwise returns false. Warning: The data must remain valid throughout the life of any QFile that may reference the resource data.
Sets a QResource to point to file. PyQt5 comes with a command line tool to do this, which takes a. This can then be imported into your app as for any other Python file or module. To compile our resources. If you run this now, it will look exactly as before, but now the icons are being loaded from the resources.
Icons visible, loading from the QRC file. For [[ activeDiscount. While it's fairly straightforward to manage your resources by editing the QRC file directly, Qt Designer can also be used to edit the resource library. This allows you to see all the icons and other data visually, rearrange them and edit them by drag-and-drop.
If you're using the standalone Qt Designer, the resource browser is available as a dockable widget, visible in the bottom right by default. If the Resource Browser is hidden you can show it through the "View" menu on the toolbar. To add, edit and remove resource files click on the pencil icon in the Resource browser panel. This will open the resource editor.
Standalone Qt Designer view. In the resource editor view you can open an existing resource file by clicking on the document folder icon middle icon on the bottom left.
Edit Resources in Qt Designer. On the left hand panel you can also create and delete resource files from your UI. While on the right you can create new prefixes, add files to the prefix and delete items. Changes to the resource file are saved automatically.
In order to be able to add icons using the Qt Resource system from within Qt Creator you need to have an active Qt Project, and add both your UI and resource files to it. If you don't have a Qt Creator project set up you can create one in your existing source folder. Qt Creator will prompt before overwriting any of your files. Select the folder above your source folder for "Create in", and provide the name of your source folder as the project name.
You can delete any files created, except the. Select the location. The use of other separators e. You can check for a file's existence using exists , and remove a file using remove. The file is opened with open , closed with close , and flushed with flush.
QFile also inherits getChar , putChar , and ungetChar , which work one character at a time. The size of the file is returned by size. You can get the current file position using pos , or move to a new file position using seek.
If you've reached the end of the file, atEnd returns true. By default, QFile assumes binary, i. The next example uses QTextStream to read a text file line by line:. By default, it assumes that the user system's local 8-bit encoding is used e. This can be changed using QTextStream::setCodec. See the class documentation for details. On Unix, these file names are converted to an 8-bit encoding. On Unix, there are some special system files e.
In this case, however, you cannot use atEnd to determine if there is more data to read since atEnd will return true for a file that claims to have size 0. Instead, you should either call readAll , or call read or readLine repeatedly until no more data can be read. This implementation detail means that QFile is not suitable for reading and writing certain types of files, such as device files on Unix platforms. File permissions are handled differently on Unix-like systems and Windows.
In a non writable directory on Unix-like systems, files cannot be created. This is not always the case on Windows, where, for instance, the 'My Documents' directory usually is not writable, but it is still possible to create files in it. Qt's understanding of file permissions is limited, which affects especially the QFile::setPermissions function.
Constructs a new file object with the given parent to represent the file with the specified name. If the copied file is a symbolic link symlink , the file it refers to is copied, not the link itself. It's easy to find directories later with QStandardPaths, but how do you get the files deployed into them upon app installation?
Thanks for the info. Still seems a bit fussy to determine where files will end up on each platform, but I guess that's unavoidable. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science.
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