I'm working on an application that requires saving and loading of files.
To load files, I'm using QtGui.QFileDialog(), and then calling file_browser.exec_(). That gives this result:
To save a file, I'm calling file_browser.getSaveFileName() which gives a completely different looking window:
Is there any way to make both of these windows look consistent?
The static functions like getSaveFileName will always use a native dialog, unless you include DontUseNativeDialog in the options argument.
On the other hand, the QFileDialog constructor will always create an instance of Qt's built-in file dialog, no matter what options are set. You can change the file-mode to get the type of dialog you want.
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I've created a small application. The GUI is ugly, I've done it quickly. I've created a ui.qml file with Qt Design Studio.
My question is : is it simple to use my ui.qml file instead of my ui file ? I mean, do I have to change all my code when I call ui->ComponentName ?
I tried to understand how ui.qml files works, but it seems it's a completely different way to use component in C++ files than ui files..
Depending on the build system you are using, files ending with .ui are used by autouic to generate C++ code that you can call to create your user interface, usually from the constructor of your class that will be the parent for those components.
This is done by calling setupUi on the member variable 'ui', which is the same class name as the parent class, just under the Ui namespace.
QML code is interpreted, however, and can be read by QQmlApplicationEngine. You can expose properties with setContextProperty, taking a QString and a QObject*, as explained further here: https://doc.qt.io/qt-6/qtqml-cppintegration-exposecppattributes.html#exposing-methods-including-qt-slots
In short: I have a method name provided via a JSON configuration file. I'd like to call a method using this provided name. The method (with a matching name) will exist in the backend. What's the best way of going about this?
I am not quite sure what I should be searching for as an example.
To detail: I am working with a legacy application, hence the VB.NET. I am building a single PDF file from multiple PDF sources. Most of these are as is, I simply read the configuration and grab the relevant files and the job is done. However some require processing, I'd like the configuration file to pass in a method name to be called that will perform extra processing on the PDF, whatever that may be.
As there can be a lot of PDF files that can vary, I cannot simply use a property such as "PostProcessing: true".
Any ideas?
You could use reflection to reflect method names back and check them against the name passed from the property in the config file.
Like so
Type magicType = Type.GetType("MagicClass");
MethodInfo magicMethod = magicType.GetMethod("ItsMagic");
object magicValue = magicMethod.Invoke(magicClassObject, new object[]{100});
That would work.. but to be honest, I'd go with a case statement as you'll be hardcoding the method names anyway (because they are code), and it'll be strongly typed (less chance of typos and errors).
I'm writing a piece of code to simulate some stuff of diagnostic.
I've created with CANalyzer, a panel with tons of information that need to be shown using a picklist (called combobox)
What I want to do is to create a giant array of that struct that need to be selected using the SPN combobox (the picklist) , and the other parameters of the struct/object need to populate the other elements of the panel.
Is this possible without doing a tons of SysSetVariableInt or SysSetVariableString for each element?
Before I was doing this stuff using another technique, I parse the file with all the information that are stored in a giant matrix, then I use the method "on sysvar update" on the variable associated to the SPN picklist, to get the index of that, so I search for that index in the matrix, then I use the SysSetVariableInt or others, to set the values to the elements in the panel.
To populate the picklist I've found a pretty nice method "sysSetVariableDescriptionForValue" that helps to add elements, but the problem with this method, is that if you want to change elements, you can just overwrite, and not change all...so, if in a next iteration you push less element in the picklist, you will see also the old ones.
With "sysSetVariableDescriptionForValue" you basically are writing via code, the value table of that sysvariable, and is not possible (according to Vector), be flushed, on runtime... :/
I would love to do this thing using another approach, maybe with the struct is possible...i really don't know.
Any help will be very appreciated!
Regards!
TLDR; build a tool to create a .sysvar file from a structured input (comma-separated for instance), run it, get the .sysvar file and link it to the CANalyzer configuration.
I once had to create the entire testing interface with some components of the software. We didn't have a structured release procedure, and the test environment was rebuilt every time from scratch based on the new internal software interfaces. I too had to add hundreds of variables.
My solution was to generate .sysvar files programatically outside CANalyzer. Links to the .sysvar files are symbolic in the CANalyzer configuration, meaning if a file by the right name is in the right location, that file is going to be loaded.
What I want to do is to create a giant array of that struct that need
to be selected using the SPN combobox (the picklist) , and the other
parameters of the struct/object need to populate the other elements
of the panel. Is this possible without doing a tons of
SysSetVariableInt or SysSetVariableString for each element?
Create an external script to generate the .sysvar file. In the end it is just an xml file, you may study the structure of a demo one you save. Then, import that file in the CANalyzer config. You may need to close/re-open the configuration in case the .sysvar file changes.
PROs: no need to write a complicated CAPL script and update it every time a variable changes.
CONs: you must have a source for all the information, even a simple excel sheet, with all the description and such, and you have to create a tool that accepts the input file (let's assume a .csv file) and turns it into a .xml file with .sysvar extension instead.
Suppose I have a non-qt object. For example, the QT static-only log handler. How does one cause this file handler to know where to go to look for the current configuration file without, say, hard-coding the application name, organization etc. into the static log-handler function?
I have tried defining a global pointer to the configuration that gets initialized during a startup phase, but this turns out to be a hairy problem to solve during the linking phase. Is there some particular "only-way-is-the-best-way" solution?
(New to QT; if there is an "accepted" or "intended" approach, I would like to take that)
May be create global singleton class?
Or set QSettings::setDefaultFormat() to ini near your binary?
OK my project uses an xml file called Chart-app.xml inside this XML file there is a tag called <version></version> which I keep in the format like: <version>1.2.128</version> I am wondering if I can set it to append to the third number every time I run my project.
So if I ran it now it would be 1.2.129, then if i ran it again it would be 1.2.130
Thanks!!
After reading VonC's answer I don't know anything about ANT or creating custom builds, but he did give me an idea that seems to be working:
I already have a method to tell if the app is running in the ADL (within eclipse), so if it is, I just have my app open the file itself and change the value.
I am not sure there is a native Eclipse way to do this.
You can increment the number within that xml file either:
programmatically, launching a special class which do that, and then call your primary application Class
through a dependency during launch, for instance, you can make a JUnit test suite which will first call a Java class doing the increment, and then call your main method.
But in both case, you would have to somehow code the increment process.
Note: it is easier when you want to increment something each time you build, because you can add a custom builder.