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Custom spinner - fast increment/decrement

MrGarbage

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  • "MrGarbage" started this thread

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Thursday, October 11th 2007, 5:28pm

Custom spinner - fast increment/decrement

Hi,

I am implementing a custom spinner control built using 2 small
buttons and a QLineEdit. Everything is in place and working. One
button increments the linedit, the other decrements it.

I would like to add functionality where if you click and hold
one of the buttons then after 2 secs or so the increment/decrement
speed is much faster.

I have some ideas using a timer and so forth, but perhaps there
is some already available functionality I am not aware of.

Any suggestions?

Many thanks!

Mark

mchara

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Friday, October 12th 2007, 6:55am

I think timer is good idea here, but I advise you to start the timer on mousePress and stop it after those 2 sec. to not let the timer working unused(lots of them can slowdown your application).
I would change some bool when timer stops after 2 seconds from mouse press and reset it on mouseRelease.
But if you'll need second timer to control increments/decrements timing when button is pressed, there's no sense of having two timers per widget, so maybe changing increment speed after some number of ticks instead of waiting those 2 seconds on sec timer.
You may also check QTime class - it allows you to get time on mousePress and measure time that passed without second timer.
mc