speedometer division control of values

[EPapadopoulou]

Hi, great work with the speedometers!

I have a question/request!

Example: Given the following: minSpeed=0, maxSpeed=20000, lowSpeedPercent=50, mediumSpeedPercent=35, can we have the low zone between the values 0 and 1000, the medium zone between 1000 and 2000 and the high zone between 2000 and 20000?

Also, is it possible to assign labels to the ticks? For example, instead of showing 1000m, I would like to show 1km!

Thanks in advance!

[anastr]

Hello @EPapadopoulou ,
to set low zone between the values 0 and 1'000 easily we calculate percent value for (1'000 of 20'000).
which means lowSpeedPercent = 1'000 * 100 / 20'000 = 5%.
same way for mediumSpeedPercent = 2'000 * 100 / 20'000 = 10%
by default High zone will take the remaining space.
and be careful, lowSpeedPercent must be smaller than mediumSpeedPercent, or it may throw IllegalArgumentException.

for ticks issue, it doesn't support ... it can be considered in the next version.

[EPapadopoulou]

Hi! Thanks for the quick reply. That's not what I meant. I did not explain it well enough. I understand how to setup the lowSpeedPercent and mediumSpeedPercent to reflect what I want and I've already done that. What I really want is to have the gauge to function in a logarithmic scale. i.e. I want the values between 0 and 2000 to cover most of the gauge.
Thanks!

[anastr]

mmmm, unfortunately, this kind of speedometer doesn't supported 😞 .
to do this in not-practical way you can use ImageSpeedometer, but it is not very good for dealing with values.

any suggestions !!

[EPapadopoulou]

Actually, that's what I was thinking of. I was going to create my own image so that the appropriate values are displayed and I was going to calculate the values with speedTo. However, I will not be able to control the value displayed in the center.

[anastr]

After you build your own image, build costum speedometer by extends Image Speedometer and override getDegreeAtSpeed(float speed) method to return custom degree at current speed value like so:

@Override
protected float getDegreeAtSpeed(float speed) {
     int maxDegree = getEndDegree() - getStartDegree();
     // calculate your degree, must be between [0, maxDegree]
     float degree = ....;
     // we add startDegree to make sure our degree between startDegree and endDegree.
     return degree + getStartDegree();
}

I hope it will help...

[anastr]

since version 1.1.6 you can change tick label as you wish use OnPrintTickLabel :

speedometer.setOnPrintTickLabel(new OnPrintTickLabel() {
    @Override
    public String getTickLabel(int tickPosition, int tick) {
        if(tick >= 1000)
            return String.format(Locale.getDefault(), "%.1f Km", tick / 1000f);
        return String.format(Locale.getDefault(), "%d M", tick);
    }
});

this will show 1km instead of showing 1000m 👍
read release 1.1.6 note to know what is changes.

[wenmin92]

@anastr 1.4.0(kotlin) should open fun getDegreeAtSpeed(speed: Float) for override. I need override it to draw a speed view which ticks not equal, see below:

[anastr]

Hi @wenmin92
You can use Custom Ticks for this:

    speedometer.setTicks(0, 2, 5, 10, 25, 50, 75, 150, 300)

Or maybe you need Custom Tick Label

[anastr]

this kind of behavior will not be implemented, since you can add it in ImageSpeedometer, Custom Ticks, Custom Tick Label and SpeedTextListener.