"Right click" on iOS

MacOSX and iOS
1

This is rather embarrassing to ask since it’s such a basic feature, but how are “right clicks” (= touch and hold) handled in iOS?

I have a desktop app that has some context menus on right click that I’d like to show in the iOS version, but I am too simple-minded to figure out which callbacks I need to use (or if I need to roll my own solution with a timer, which I hardly believe).

2

Well, it’s not a “right click”, it’s a “long press”, but yes, you of course need to use a timer yourself if you want that behaviour, because how else could JUCE or iOS know whether your component considers a long press to be a special event? Many (most?) components wouldn’t want anything different to happen just because you’ve held a touch down for a couple of seconds.

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3

Alright, just wanted to confirm this before I reinvent the wheel. Thanks for clearing that up.

4

Since this thread was started a few years ago, I just wanted to follow up and check whether there have been any subsequent additions to JUCE to handle “right clicks” for iOS?

5

It’s pretty simple to do this yourself, here is my shot at it:

class TouchAndHoldComponent
{
public:

	TouchAndHoldComponent():
		updateTimer(this)
	{

	}
	
	virtual ~TouchAndHoldComponent()
	{
		abortTouch();
	}
	
	virtual void touchAndHold(Point<int> downPosition) = 0;
	
	void startTouch(Point<int> downPosition)
	{
		if (isTouchEnabled())
		{
			updateTimer.startTouch(downPosition);
		}
	}

	void setDragDistance(float newDistance)
	{
		updateTimer.setDragDistance(newDistance);
	}

	void abortTouch()
	{
		updateTimer.stopTimer();
	}

	bool isTouchEnabled() const
	{
		return touchEnabled;
	}

	void setTouchEnabled(bool shouldBeEnabled)
	{
		touchEnabled = shouldBeEnabled;
	}

private:

	struct UpdateTimer : public Timer
	{
		UpdateTimer(TouchAndHoldComponent* parent_):
			parent(parent_),
			dragDistance(0.0f)
		{}

		void startTouch(Point<int>& newDownPosition)
		{
			downPosition = newDownPosition;
			startTimer(1000);
		}

		void setDragDistance(float newDistance)
		{
			dragDistance = newDistance;
		}

		void timerCallback()
		{
			stopTimer();

			if (dragDistance < 8.0f)
			{
				parent->touchAndHold(downPosition);
			}
		}

	private:

		Point<int> downPosition;

		float dragDistance;

		TouchAndHoldComponent* parent;
	};

	bool touchEnabled = true;

	UpdateTimer updateTimer;
};
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