Home » Developing U++ » UppHub » Uniq : single instance applications made easy
Uniq : single instance applications made easy [message #31118] |
Sun, 06 February 2011 00:27 |
mdelfede
Messages: 1308 Registered: September 2007
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Ultimate Contributor |
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I started Uniq class, by now working just for Linux,windows part in development. It allows to have a single application instance running and other instances passing their command line to it.
Example code :
UniqTest.lay :
LAYOUT(UniqTestLayout, 404, 240)
ITEM(LineEdit, edit, SetEditable(false).WantFocus(false).LeftPosZ(8, 388).TopPosZ(8, 220))
END_LAYOUT
UniqTest.h :
#ifndef _UniqTest_UniqTest_h
#define _UniqTest_UniqTest_h
#include <CtrlLib/CtrlLib.h>
#include <Uniq/Uniq.h>
using namespace Upp;
#define LAYOUTFILE <UniqTest/UniqTest.lay>
#include <CtrlCore/lay.h>
class UniqTest : public WithUniqTestLayout<TopWindow>
{
private:
public:
typedef UniqTest CLASSNAME;
UniqTest();
// handles news app instances
void handleInstance(Vector<String> const &v);
};
UniqTest.cpp :
#include "UniqTest.h"
UniqTest::UniqTest()
{
CtrlLayout(*this, "Window title");
}
// handles news app instances
void UniqTest::handleInstance(Vector<String> const &v)
{
String s = edit.Get() + "NEW INSTANCE LAUNCHED\n Command line : '";
for(int i = 0; i < v.GetCount(); i++)
s += v[i] + ",";
if(s[s.GetCount() - 1] == ',')
s = s.Left(s.GetCount()-1);
s += "\n";
edit <<= s;
ProcessEvents();
}
GUI_APP_MAIN
{
// create Uniq object
Uniq uniq;
// if not inside first instance, send commandline
// to first instance and leave
if(!uniq)
return;
UniqTest uniqTest;
// setup callback handling other app's instances
uniq.WhenInstance = callback(&uniqTest, &UniqTest::handleInstance);
uniqTest.Run();
}
This code allows first app instance to start. If you start other instances, their Command Line is routed to it with a posted callback, allowing opened instance, for example, to open a file.
In this small example, it just echoes command line of newly started apps.
Ciao
Max
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