Legend and title - ability to set chart title and legend about hellocharts-android

[lecho]

Hi, I'm not working on that. I don't understand what's the problem and why many people ask about that. Legend can be created as separated view so you and anybody else could create it on your own. It is even a good idea to separate legend from chart view because legend view don't have to be invalidated so often. Data sharing between chart and legend is also not an issue. What's more everyone want the legend to look in a different way.
So I have no plans to add legend until someone provide or propose some viable solution.

[lecho]

Hi, thanks for your feedback:) I didn't plan to add legend or title as I've explained in issue #4 but already few people have asked about it so I'll keep this issue open. If I find some time I'll try to implement it.

[mendhak]

Sorry, I should have searched. Yeah, probably keep the issue open for a bit.

It's easy to implement anyway, with a RelativeLayout and by setting a TextView at an absolute position I'm able to get a chart title.

[Alireza-Farahani]

@lecho I too think legends and title are part of the graph and should be implemented as a part of this great and beautiful library's API.

[lecho]

Ok:) I'll try to do this in next few days.

[douglasjunior]

@lecho Could you give us an example of how to make a legend out of the chart? Which components you use for this?

[lecho]

@douglasjunior Hi, legend component is not finished yet, for now you need to create legend on your own.

[gtcompscientist]

@lecho The legend is the only thing holding me back from using this library. Do you have an updated ETA for it being implemented?

[lecho]

Sorry, for now time is the issue, I can't promise anything in that matter.

[alvinwo]

hello, when will be this api ready?

[abdeladim-s]

Hi all,
if someone still need to add titles as legend to their charts,this is my own implementation:

public void addTitles(LineChartView chart, List<Line> lines,
   		String[] titles, int textSize, String backgroundColor, int backgrounfAlpha) {
   	if (lines.size() != titles.length) {
   		return;
   	}
   	// set a linear layout container
   	LinearLayout listOfTitles = new LinearLayout(getActivity());
   	listOfTitles.setOrientation(LinearLayout.VERTICAL);
   	LayoutParams LLParams = new LayoutParams(LayoutParams.WRAP_CONTENT,
   			LayoutParams.WRAP_CONTENT);
   	listOfTitles.setLayoutParams(LLParams);
              // set radius corners 
   	GradientDrawable shape = new GradientDrawable();
   	shape.setCornerRadius(8);
   	shape.setColor(Color.parseColor(backgroundColor));
   	shape.setAlpha(backgrounfAlpha);
   	listOfTitles.setBackground(shape);

   	TextView[] textViewTitles = new TextView[titles.length];

   	for (int i = 0; i < titles.length; i++) {
   		textViewTitles[i] = new TextView(getActivity());
   		textViewTitles[i].setTextColor(lines.get(i).getColor());
   		textViewTitles[i].setText(titles[i]);
   		textViewTitles[i].setTextSize(textSize);
   		listOfTitles.addView(textViewTitles[i]);
   	}

   	// get chart parent
   	ViewGroup v = (ViewGroup) chart.getParent();

   	v.addView(listOfTitles);

   	listOfTitles.bringToFront();
   	
   	// make the view draggable 
   	listOfTitles.setOnTouchListener(this);

   }

if you want to make the legend draggable :
1 - add implements OnTouchListener to your activity
and then :

        float dX = 0;
	float dY = 0;
	@Override
	public boolean onTouch(View view, MotionEvent event) {
		switch (event.getActionMasked()) {
		case MotionEvent.ACTION_DOWN:
			dX = view.getX() - event.getRawX();
			dY = view.getY() - event.getRawY();
			break;

		case MotionEvent.ACTION_MOVE:
			view.setY(event.getRawY() + dY);
			view.setX(event.getRawX() + dX);
			break;

		default:
			return false;
		}
		return true;
	}

Thanks @lecho for the library!