I just tried your xcf Lowpro and it works great.

Thank You very much Lowpro!

And it is so easy to add as many themes as you want !

I wonder how can you change a theme based e.g. on time. So you could have theme 1 0:00-12:00, theme 2 12:00-15:00 and theme 4 15:00-24:00? Night theme, afternoon theme and evening theme?

Well, I figured out that you could use GUI.getDisplayTime() function. But how exactly?

That's a neat idea. I'm not sure how you'd implement that via ProntoScript, but it may very well be possible. Perhaps others will chime in.

Write a function which checks the time, compares it with the time you want to change the theme, and (if past that time) sets the global variable accordingly.

Make this function a global library.

On page that you want the check to be done, reference the function in the page script and have it run, say every 30 seconds.

I use such functions a lot, for example a) to provide an alarm clock and b) to open/close my curtains at sunrise/sunset.

I try to use your example. [Link: remotecentral.com]

I ended up using following script on my Home page:

var myTime = GUI.getDisplayTime();
if(myTime.substring(2, 3) == ":") {myHour = myTime.substring(0,2);}
else if(myTime.substring(1, 2) == ":") {myHour = myTime.substring(0,1);}
myHour=1*myHour;
if (myHour<7 || myHour>=22) {System.setGlobal ("Theme","1");
doPageStart();}
else System.setGlobal ("Theme","6");
doPageStart();
function doPageStart() {
doSetBkgd();
}
//
function doSetBkgd() {
if(System.getGlobal ("Theme")=="1") {
widget("Background").setImage(CF.widget("bkgd_1","Images","Resources").getImage(0),0); return;
}
if(System.getGlobal ("Theme")=="2") {
widget("Background").setImage(CF.widget("bkgd_2","Images","Resources").getImage(0),0); return;
}
if(System.getGlobal ("Theme")=="3") {
widget("Background").setImage(CF.widget("bkgd_3","Images","Resources").getImage(0),0); return;
}
if(System.getGlobal ("Theme")=="4") {
widget("Background").setImage(CF.widget("bkgd_4","Images","Resources").getImage(0),0); return;
}
if(System.getGlobal ("Theme")=="5") {
widget("Background").setImage(CF.widget("bkgd_5","Images","Resources").getImage(0),0); return;
}
if(System.getGlobal ("Theme")=="6") {
widget("Background").setImage(CF.widget("bkgd_6","Images","Resources").getImage(0),0); return;
}
else { System.setGlobal ("Theme","1");
widget("Background").setImage(CF.widget("bkgd_1","Images","Resources").getImage(0),0);
}
}

Note that this example does not account for 12 hour vs 24 hour clock. In fact, I think it assumes 24 hour clock.

For a quick and dirty way to ascertain which clock format is in use, see here:

[Link: remotecentral.com]

I cannot figure out how to have more than 2 possibilities (day/night). If I try to put more if sentences it does not work.

OK I figured it out. Use else if ...