| msg250013 - (view) |
Author: Terry J. Reedy (terry.reedy) *  |
Date: 2015-09-06 19:16 |
| https://stackoverflow.com/questions/32414942/python-scroll-speed At least on Win7, tk.Texts scroll, by default, at an anemic 2-3 lines per wheel click, ignoring the system wheel setting. What happens on other systems? I consider this a probable tk bug, at least on Widows, but we can override the default (on Windows) with def mousescroll(event): return 'break' text.bind('', mousescroll) turtledemo.__main__ has wheel code (for font resizing) for Windows, Linux, and Mac. Unless we can access system settings, we might add a config option. |
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| msg250026 - (view) |
Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2015-09-06 22:11 |
| On X Window the scroll step in text widget is constant (50 pixels). On Windows and Mac OS it should depend on mouse settings. Run with, execute bind . {puts %D} and try to roll mouse wheel on Tk window with different speed and settings. |
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| msg250073 - (view) |
Author: Terry J. Reedy (terry.reedy) * |
Date: 2015-09-07 05:40 |
| The SO OP reported Idle Shell and Editor behavior. I retested minimal tk.Text(root).pack(), eliminating Idle as a factor, before and after changing system lines setting from 3 to 9, and got the constant same behavior. The now too small 50 pixels seems about what it is doing. Serhiy, I do not understand your 'Run ...' sentence. |
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| msg250078 - (view) |
Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2015-09-07 06:04 |
| You can measure your mouse speed with following pure Tcl/Tk script. |
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| msg250079 - (view) |
Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2015-09-07 06:05 |
| Or with following Python script. |
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| msg296411 - (view) |
Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2017-06-20 10:53 |
| > Serhiy, I do not understand your 'Run ...' sentence. Sorry, there was a typo in my sentence. I meant "Run the program 'wish' and enter the following command". |
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| msg317820 - (view) |
Author: Terry J. Reedy (terry.reedy) * |
Date: 2018-05-28 00:52 |
| This is 'out of date' in the sense that I have decided that the root problem is scrolling by pixels instead of lines. Once we do the latter, for #33664, we can just scroll by, say, 5 lines instead of 3, which I think is sufficient. |
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