Text box for two value slider

General JUCE discussion
1

It’s a very good feature to have a text entry box for slider. But this box does not work with two valued slider. I found you only need to override two functions to make it work:

void Slider::labelTextChanged(Label* label)
{
	const String text = label->getText();
	int index = text.indexOfChar(T(','));
	if(index>0)
	{
		const String low = text.substring(0, index);
		const String high = text.substring(index+1, text.length());
		setMinValue(low.getDoubleValue());
		setMaxValue(high.getDoubleValue());
		updateText();
	}
}

const String getTextFromValue(double value)
{
	String text;
	text.printf(T("%.0f,%.0f"), getMinValue(), getMaxValue());
	return text;
}

However, the labelTextChanged in Slider is not virtual so I cannot override it. Is it possible to add this small feature? Thanks.

2

?? It’s already virtual - it’s part of the LabelListener interface…

3

But the Slider class override it with a non-virtual one. Does this work in C++?

4

It’s impossible to ‘unvirtualise’ a method! Any method that overrides a virtual method is by definition virtual, you don’t need to use the keyword.

5

Necro in case anyone is searching for how to do this (which is how I got to this thread)

slider.textFromValueFunction = [&](double v) { return juce::String(slider.getMinValue()) + ", " + juce::String(slider.getMaxValue()); }; // Defines textbox value

You can then force the textbox to refresh when slider value changes:

slider.updateText(); // Forces textbox refresh
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