[swift-users] Waiting for mouse input in a while loop (OS X)

[Ramakrishna Mallireddy]

Make the loop into a function.
call the function everytime a mouseevent happened with appropriate input
counters.

var i = 1
var innerloopCounter = 1
var innerloopRunning = false
// this is the os mouseevent handler
func mouseevent(event:Event) {
if i < toSort.count {
sort(toSort)
}
}
// ++, -- operators will be dropped from swift 3.0
// now these operators are deprecated.
func sort(toSort:[Element]) {
var j = innerloopCounter > 0 ? innerloopCounter : i
if(toSort[j-1] > toSort[j]) {
    let temp: Int = toSort[j]
    toSort[j] = toSort[j-1]
    toSort[j-1] = temp
    innerloopCounter = j - 1
    print(toSort)
  }
  if innerloopCounter == 0 {
i += 1
}
}



On Wed, Mar 23, 2016 at 11:36 PM, Ergin Bilgin via swift-users <
swift-users at swift.org> wrote:

> "print(toSort)" is only a placeholder there. Yes, it will be a
> visualization. I am thinking of saving each state of "toSort" to another
> array and show a fake visualization after sorting is finished. Using stdin
> also might be a good solution but not very presentable.
>
> Ergin
>
> On 23 March 2016 at 19:55, George King <gwk.lists at gmail.com> wrote:
>
>> I don't know of an easy way to block the main thread and wait for GUI
>> input, without disrupting Cocoa. If you do not need the GUI, then I suggest
>> using the debugger to set a breakpoint; in general it's worth the effort to
>> learn to use the debugger, rather than just print statements.
>> Alternatively, you could read a line from stdin, and then step through your
>> algorithm by hitting return in the terminal. If you are trying to visualize
>> your algorithm it gets trickier to do so without restructuring it to
>> operate within the runloop.
>>
>> On Mar 23, 2016, at 1:48 PM, Ergin Bilgin <erginbil at gmail.com> wrote:
>>
>> Thank you for help. Maybe I have over simplified my problem. In my first
>> example, your advice was totally fine. But when I want to do something more
>> complex, I could not figure out how to use it. For example, I want to print
>> each step in my insertion sort. Like this:
>>
>> for i in 1..<toSort.count{
>>     var j: Int = i
>>     while ((j > 0) && (toSort[j-1] > toSort[j])){
>>         let temp: Int = toSort[j]
>>         toSort[j] = toSort[j-1]
>>         toSort[j-1] = temp
>>         j--
>>         print(toSort)
>>         //Wait here.
>>     }
>> }
>>
>> I am looking for a solution without tearing the sorting algorithm into
>> pieces. (If it is possible.)
>>
>> Ergin
>>
>> On 23 March 2016 at 18:52, George King <gwk.lists at gmail.com> wrote:
>>
>>> Hi Ergin,
>>> Are you familiar with how events are delivered via the application
>>> runloop? Essentially, you should not create a top-level loop that waits for
>>> input; the application runloop does this for you. If you want to accumulate
>>> 50 clicks, create the counter variable in the appropriate NSResponder (or
>>> UIResponder on iOS), e.g. your root NSView or your NSViewController. Then
>>> override `func mouseDown(event: NSEvent)` and increment the counter there.
>>> Hope that helps,
>>> George
>>>
>>>
>>> >
>>> > On Mar 23, 2016, at 12:35 PM, Ergin Bilgin via swift-users <
>>> swift-users at swift.org> wrote:
>>> >
>>> > Hello,
>>> >
>>> > I have a very simple while loop and I want to wait for a mouse
>>> click(can be a different input, not important) between every step.  What I
>>> want to achieve is something like this:
>>> >
>>> > while (i < 50){
>>> >
>>> >
>>> > print(i)
>>> >
>>> >     i
>>> > += 1
>>> >
>>> >     waitForMouseClick
>>> > () //Wait here for user input.
>>> > }
>>> > I also use Sprite Kit if you can think a solution related to it.
>>> >
>>> > Cheers,
>>> >
>>> > Ergin
>>> >
>>> > _______________________________________________
>>> > swift-users mailing list
>>> > swift-users at swift.org
>>> > https://lists.swift.org/mailman/listinfo/swift-users
>>>
>>>
>>
>>
>
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>
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