Copy download graph as PNG

[gameroman]

Describe the feature

Similarly to existing Download as PNG I think it would be useful to have Copy as PNG

I think this would be useful when you quickly want to copy a PNG of the graph without having to download a file on your device

Additional information

• Would you be willing to help implement this feature?

Final checks

• Read the contribution guide.
• Check existing issues.

[graphieros]

@gameroman

Some information regarding feasibility with the current state of the vue-data-ui library:

There is only one slot available for the download png action. I'm not sure yet if I'm going to add another slot just for copy, knowing that the same can be used in this case, but would force us to decide if we prefer either to copy or to download. I think for npmx it would make sense to have the copy png action instead of the download. I would however keep the svg download action as is.

To replace the 'download png' action by a 'copy png' action:

1. In the configuration object of the charts, userOptions.callbacks.img will have to be modified to copy instead of downloading

2. In the #optionImg slot of the charts, used to customise the related icon, a similar approach as the one used for the #optionAltCopy slot could be used to signal copy success or error.

3. The translation provided in the config under userOptions.buttonTitles.img should be updated (by the way, fix: typo in chart config attribute #2328 solved a typo in FacetBarChart)

4. These changes should be reflected in all chart components with this action:

• TrendsChart.vue
• VersionDistribution.vue
• FacetBarChart.vue

PS. If a hack exists to have both, feel free to propose ;)