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Re: Just one instance of application running (SingleApp) [message #24638 is a reply to message #24634]

Tue, 26 January 2010 09:37

koldo
Messages: 3437
Registered: August 2008

Senior Veteran

Hello Sc0rch

I have compiled your original version and final version and none of them work for me Sad

I have changed them a little and now they work for me:

First version (Windows only):

#include <CtrlLib/CtrlLib.h>
using namespace Upp;

class UniqueWindow : public TopWindow
{
public:
	typedef UniqueWindow CLASSNAME;
	UniqueWindow() {
		Title("SingleApp Test");
	}
	bool IsSingleApp() {
		if(::FindWindow(NULL, GetTitle().ToString())) 
			return false;
		return true;
	}
};

GUI_APP_MAIN
{
	if (!UniqueWindow().IsSingleApp()) {
		Exclamation("Another instance of application already exists!");
		return;
	}	
	UniqueWindow().Run();
}

Second version (Windows and Linux):

#include <CtrlLib/CtrlLib.h>
#include <SysInfo/SysInfo.h>
using namespace Upp;

class UniqueWindow : public TopWindow
{
public:
	typedef UniqueWindow CLASSNAME;
	UniqueWindow() {
		Title("SingleApp Test");
	}
	bool IsSingleApp() {
		if(GetWindowIdFromCaption(GetTitle().ToString()) > 0) 
			return false;
		return true;
	}
};

GUI_APP_MAIN
{
	if (!UniqueWindow().IsSingleApp()) {
		Exclamation("Another instance of application already exists!");
		return;
	}	
	UniqueWindow().Run();
}

Only change is to add #include <SysInfo/SysInfo.h> and instedad of FindWindow() I have used GetWindowIdFromCaption().

Best regards
Koldo

Best regards
Iñaki

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