Line 1: |
Line 1: |
| + | |
| + | The event '''on.timer''' is fired when a [[:Category:timer|timer]] is run. |
| + | |
| + | By default, it has no argument, but you can pass gc to it for instance. |
| + | |
| + | == Example == |
| + | |
| + | Below is an example of a program that draws a line on the screen when the user resizes the window : |
| + | <source lang="lua"> |
| + | |
| + | function on.paint(gc) |
| + | if message then |
| + | gc:setFont("sansserif", "r", 10) -- initialize font drawing |
| + | gc:drawString(message, 0, 0, "top") -- display the message at (0, 0) coordinates |
| + | message = nil -- erase the message |
| + | timer.start(1) -- start a timer to exit on.paint() but keep in mind that we have to redraw the screen |
| + | end |
| + | end |
| + | |
| + | function on.timer() |
| + | timer.stop() |
| + | platform.window:invalidate() |
| + | end |
| + | |
| + | function on.charIn(ch) |
| + | message = "Hello World !" -- store a message |
| + | platform.window:invalidate() -- force display |
| + | end |
| + | </source> |
| + | |
| + | Check out the [http://www.inspired-lua.org/2011/05/linking-events/ the full explanation of this example] in the tutorials part. |
| | | |
| | | |
| [[Category:Events]] | | [[Category:Events]] |