# mouse event

shalini gnana

Ranch Hand

Posts: 189

posted 9 years ago

I need to add tooltip for the mouse event i.e., In graph, when the mouse goes over the co-ordinate the values should be display.I used paint method to draw the graph,in java.Can any one say how this should be achieved...Its quite emergency..

shalini gnana

Ranch Hand

Posts: 189

posted 9 years ago

Thanks alot...

But you have taken the data as 26.2,45.5,....in that way,

i need for the co-odrinates of x and y ie.,for a graph..

Like a real graph for plotting datas..

can you help me..

But you have taken the data as 26.2,45.5,....in that way,

i need for the co-odrinates of x and y ie.,for a graph..

Like a real graph for plotting datas..

can you help me..

Craig Wood

Ranch Hand

Posts: 1535

posted 9 years ago

See how the ordinate data was scaled in the example above: from zero to the maximum value.

You can do the same for your x values - compute a scale factor that will show them in the

available space. You can scale them to fit within any limits that you want.

For example you could scale the data along either axis to fit between the minimum value

and maximum value, or from zero to the maximum value or from zero to a value above the

maximum. How you set your graph up depends on what you want to do.

The technique is the same: divide the available space by the range in data values to get

the scale. Apply the scale to your data values and offset them relative to the graph

origin.

You can do the same for your x values - compute a scale factor that will show them in the

available space. You can scale them to fit within any limits that you want.

For example you could scale the data along either axis to fit between the minimum value

and maximum value, or from zero to the maximum value or from zero to a value above the

maximum. How you set your graph up depends on what you want to do.

The technique is the same: divide the available space by the range in data values to get

the scale. Apply the scale to your data values and offset them relative to the graph

origin.