When a QFile is opened using this function, behaviour of close is controlled by the AutoCloseHandle flag. If AutoCloseHandle is specified, and this function succeeds, then calling close closes the adopted handle. Otherwise, close does not actually close the file, but only flushes it. Sequential devices, such as stdin and stdout, are unaffected by this limitation.
You need to enable support for console applications in order to use the stdin, stdout and stderr streams at the console. To do this, add the following declaration to your application's project file:. Opens the existing file descriptor fd in the given mode. Warning: If fd is not a regular file, e. In those cases, size returns 0. Warning: Since this function opens the file without specifying the file name, you cannot use this QFile with a QFileInfo. Removes the file specified by fileName.
Renames the file currently specified by fileName to newName. If a file with the name newName already exists, rename returns false i.
If the rename operation fails, Qt will attempt to copy this file's contents to newName , and then remove this file, keeping only newName. If that copy operation fails or this file can't be removed, the destination file newName is removed to restore the old state.
Renames the file oldName to newName. Sets fileName to size in bytes sz. Returns true if the resize succeeds; false otherwise.
If sz is larger than fileName currently is the new bytes will be set to 0, if sz is smaller the file is simply truncated. Sets the name of the file. The name can have no path, a relative path, or an absolute path. If the file name has no path or a relative path, the path used will be the application's current directory path at the time of the open call.
Sets the permissions for the file to the permissions specified. Any key events received in the loaded item should likely also be accepted so they are not propagated to the Loader.
Notice the focus property is set to true for the Loader as well as the Item in the dynamically loaded object:. Once KeyReader. In some cases you may wish to use a Loader within a view delegate to improve delegate loading performance. This works well in most cases, but there is one important issue to be aware of related to the creation context of a Component. In the following example, the index context property inserted by the ListView into delegateComponent 's context will be inaccessible to Text, as the Loader will use the creation context of myComponent as the parent context when instantiating it, and index does not refer to anything within that context chain.
This property is true if the Loader is currently active. The default value for this property is true. If the Loader is inactive, changing the source or sourceComponent will not cause the item to be instantiated until the Loader is made active.
Setting the value to inactive will cause any item loaded by the loader to be released, but will not affect the source or sourceComponent. The status of an inactive loader is always Null. See also source and sourceComponent. This property holds whether the component will be instantiated asynchronously. By default it is false. When used in conjunction with the source property, loading and compilation will also be performed in a background thread.
Loading asynchronously creates the objects declared by the component across multiple frames, and reduces the likelihood of glitches in animation. When loading asynchronously the status will change to Loader.
Once the entire component has been created, the item will be available and the status will change to Loader. Translating Applications. The Qt Resource System is a mechanism for storing binary files in an application. As you can see on the following image, the QPushButton that are used for the media actions play, pause, stop, and so on are using the default icons meant for such actions.
You can find more information about the rcc command, and. Please download a browser that supports JavaScript, or enable it if it's disabled i. I try to load the dwg using ertenal library but the program crash in notify in my core application.
But it works with a non resource file. But the problem is not solved. I have no problem for icons. So what i do wrong? Roy44 said:.
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