Improve ticks for scale slider

[jstein]

there are 5 ticks at the scale

|--,--|--,--|
0       249m

why is the 3rd and the 5th tick larger?

The value "249m" is centered below the 4th tick. It should nominate the whole length.

Is it possible, to draw a individual bar with more human readable values?

Zoom A

|--,--|--,--|
0     50    100 m 

Zoom B

|---,---|---,---|
0       .5      1 km

[stoecker]

(In [3234]) fixed #4889 - map scale middle line was too long

[anonymous]

it looks if only the Line was fixed:
g.drawLine(49, 3, 49, 7);

the ticks should partition the distance in parts that make sense:

BAD:
1/4 of 249m = ?

NICE:
1/4 of 100m = 25 m

[stoecker]

Well, we have no real fine zoom steps, so there would be lots of work involved to have nice parts. Also it would confuse users when the scale changes verytime.

[jstein]

it would only need to find the next matching scale.

at least each tick should represent an integer value of meter, else the ticks dont make any sense.

its confusion to divide 29 m in quarters, not to change the length of a bar.
There is nothing bad to change this bar to fit the scale of the map.

one could plot
length mod (4 * 10^{x) = 0 for values (0.. 32) * 10}x
length mod (4 * 5 * 10^{x) = 0 for values (32..100) * 10}x

where x is a factor to fit on all scales.

That should be easy to code and the ticks make sense then.

[bastiK]

Replying to jstein:

That should be easy to code and the ticks make sense then.

Go ahead, then. :)

Currently we have too many requests for too view developers. Your suggestion makes sense, but maybe it'll take a while till someone does it.

[Don-vip]

Closed as duplicate of #12644.
Replying to bastiK:

maybe it'll take a while till someone does it.

6 years :)