Viewport inertial scroll - still available? - (JUCE 6.07)

General JUCE discussion
1

My viewports used to feature inertial scrolling in both Mac and Windows desktop/plugin builds (back in JUCE 5.x times), and I have called ‘setScrollOnDragEnabled(true)’ - is this feature still supported with mouse dragging?
Did I miss a setting somewhere that initialises smooth inertial scroll? (I don’t see any options in the Viewport doc).
Thanks.

2

Anybody?

3

We’ve used Juce since version 5.0 and the viewports never had inertial scrolling for the mouse. But it would be great to add it. Also for mouse-wheel etc.

4

I’ll make a video and share later - my main graph viewport definitely had inertial scrolling, just got to dig up an older build.

5

It’s a little choppy due to both GUI refresh rate and screen recording, but you can see that when the mouse stops moving, the graph viewport continues to scroll for a little while (with deceleration).

https://www.dropbox.com/s/bru9ljjgzephons/InertialScroll.mp4?dl=0

6

Maybe you’ve used a timer and implemented that yourself?

7

No - it’s just a viewport with a component that is bigger than the viewport.

8

Maybe something about the fact the that component viewed is much bigger (maybe 5X the area) caused this effect… I don’t know - it used to look like it was designed to work that way, and the same code just instantly stops scrolling the window when I stop doing a mouse drag now (I believe since I moved to JUCE 6.07 - but I suppose I’ll have to pull old code and double check this behavior -I’d just assumed it was a built in behavior of JUCE viewport).

9

Well, I have an old project built on JUCE 5.3 and it exhibits that deceleration behavior on a viewport with viewed component that has no children and is just filled with a black background. (I even just totally stripped that JUCE 5.3 project to just a single window with a viewport (bounds to 600X600) and viewed component (TextEditor with bounds size 3000,3000) - and it still does the scroll deceleration - code:

//editor constructor
        setBounds (0, 0, 600, 600);
        addAndMakeVisible(textEditor);
        addAndMakeVisible(mViewport);
        textEditor.setBounds(juce::Rectangle<int>{3000, 3000});
        mViewport.setViewedComponent(&textEditor, false);
        mViewport.setScrollOnDragEnabled(true);
        mViewport.setScrollBarsShown(true, true);
        mViewport.setBounds(this->getBounds());

).

10

OK… well… sorry… it looks like I see this scrolling behavior with my empty test project even if based on JUCE 6.07… maybe that’s not called inertial scroll… I don’t know… nevermind… I will dig into it some more.