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How to program real U++ applications [message #25966]

Mon, 22 March 2010 15:55

koldo
Messages: 3435
Registered: August 2008

Senior Veteran

Hello all

I would like to ask you how you design professional U++ applications.

Thinking in a GUI application with a main window, how do you connect classes with main class containing main Serialize/Xmlize configuration:

- Main class is a global variable.
- You include in classes constructor as argument a pointer to main class
- You access from a subclass the main class using dynamic_cast<MainClass *>(GetParent()->GetParent()-> ... as many times as necessary.

Best regards
Iñaki

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Re: How to program real U++ applications [message #25968 is a reply to message #25966]

Mon, 22 March 2010 16:27

mdelfede
Messages: 1308
Registered: September 2007

Ultimate Contributor

I usually separate configuration from main class, so a "Settings" class wich contains all global settings. Example :

In "settings.h"

class Settings
{
    private:
......(all app wide settings here)

    public:
......(all getters/setters for public accessible settings)

};

Settings &globalSettings();

and, in "settings.cpp"

Settings &globalSettings()
{
    static Settings settings;

    return settings;
}

So the only public stuff is the global 'globalSettings()' function wich gives access to app-wide settings.
In settings constructor you can then put code to load (Xmlize) status, and in destructor code to save (Xmlize) status.

Ciao

Max

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Re: How to program real U++ applications [message #25969 is a reply to message #25968]

Mon, 22 March 2010 16:33

mdelfede
Messages: 1308
Registered: September 2007

Ultimate Contributor

Another stuff is when you want to save app data, not just settings.
That depends too much upon your app structure....
In my app I've got files containing a 'fixed' part (customer name, site and so on...) and a 'variable' part wich is composed by an array of classes derived from a main (Page, in my app) base class, so a polymorphic class array.
For 'fixed' part I just xmlize single values, and for 'variable' part..... also Xmlize, but the full array using PolyXML bazaar stuff. That makes really easy to add new data to the application with no need to touch at a single line in main app class.

Ciao

Max

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Re: How to program real U++ applications [message #26025 is a reply to message #25966]

Fri, 26 March 2010 14:32

mirek
Messages: 14258
Registered: November 2005

Ultimate Member

koldo wrote on Mon, 22 March 2010 10:55

Never did that.

Quote:

- You include in classes constructor as argument a pointer to main class

Sometimes it is needed. Usually not.

Quote:

- You access from a subclass the main class using dynamic_cast<MainClass *>(GetParent()->GetParent()-> ... as many times as necessary.

Never did that.

Note there is nice global serialization system that perhaps is able to solve your issue.

Mirek

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Re: How to program real U++ applications [message #26026 is a reply to message #25966]

Fri, 26 March 2010 15:30

zsolt
Messages: 702
Registered: December 2005
Location: Budapest, Hungary

Contributor

koldo wrote on Mon, 22 March 2010 15:55

I usually use the global config scheme as well:

In your dialog cpp:

#define CONFIG_KEY "YourDialogClassName"

INITBLOCK {
	RegisterGlobalConfig(CONFIG_KEY);
}

before showing your dialog:

	LoadFromGlobal(*this, CONFIG_KEY);

After closing it:

	StoreToGlobal(*this, CONFIG_KEY);

And in your main window's Serialize method will be like this:

void MainWindow::Serialize(Stream& s)
{
	int version = 1;
	s / version;

	SerializePlacement(s);
	some_member.Serialize(s);
	SerializeGlobalConfigs(s);
	
	if(version<2) return;
	//this is used in newer versions
}

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Re: How to program real U++ applications [message #26044 is a reply to message #26026]

Fri, 26 March 2010 20:01

koldo
Messages: 3435
Registered: August 2008

Senior Veteran

Thank you Massimo, Mirek and Zsolt

Do you know it this global serialization is available for Xmlize?

Best regards
Iñaki

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Re: How to program real U++ applications [message #26046 is a reply to message #26044]

Fri, 26 March 2010 21:35

mdelfede
Messages: 1308
Registered: September 2007

Ultimate Contributor

koldo wrote on Fri, 26 March 2010 20:01

Thank you Massimo, Mirek and Zsolt

Do you know it this global serialization is available for Xmlize?

I don't think so... That's one of the reasons I use global Settings object.
BTW, I still use binary way/global serialization, but just for dialog placements/settings, I think app settings are better if centralized on a single object.

Ciao

Max

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