How to add line tooltip in pyqtgraph - tooltip

I have a line chart, and I would like to add a mouse-over tool-tip on each line. But I didn't find this API. How can I implement it?

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Highchart line chart with vertical line between values

We need a line chart where each point is not connected by a straight line, but a horizontal line from one value to the next, followed by a vertical line to pick up the new value. The picture below shows what I want.
Which chart type can I solve this?
You can use the line chart, but add the required values to form the line that you need
for example:
data: [[0,3], [1,3], [1,4], [2,4], [2,2], [3,2], [3,5], [4,5], [4,0]]
get you this:
jsFiddle

Highcharts add padding between (dynamic) line charts and graph

I have a line chart which is being dynamically updated. I want to add space between the right most plotted point and the borders of the plot
I have tried solutions here and here but they do not work. Under the plotOptions API doesn't seem to be the relevant information.

Highcharts colorAxis - Hide or add dynamically

I have a system set up where the user adds a chart and then selects the type they want. If I add the chart with the colorAxis in place, how do I hide it or remove it for those charts where I don't need it?
If I create the chart without the colorAxis, what is the proper way to add the colorAxis? I tried using the addAxis just like you would for any other axis, but there are problems. The remove function removed the colorAxis from the chart object, but not from the chart. It also resulted in an error.
You can destroy colorAxis by remove legend.
chart.legend.destroy();
Example: http://jsfiddle.net/h0rkf05t/

Highcharts Line Chart Legend Symbol Disappeared When Using Gradient Fill

I'm trying to fill gradient color in my charts, with the sample code in the demo "http://www.highcharts.com/demo/pie-gradient". And then I found in line charts' legend, the line part of the symbol disappeared, while the markers were still visible. If I disable the markers, then there is nothing left.
Here is an example based on the code of a line chart demo: http://jsfiddle.net/TCbE3/
enter code here
I'm using Highcharts 3.0.1, with both latest FireFox and Chrome, and this problem occurs in both.
Any ideas how to fix this problem?

highcharts legend overlapping

highcharts legend overlapping with the name section of the series.
I have got an url : Issue example.
I want to place the legend text bellow the chart.
Please help.
You need to disable floating parameter or use y parameter (http://api.highcharts.com/highcharts#legend.y) to modify position.

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