Use of 'ClickAt ' selenium command

Question

I\'m confused about the difference between the Click and ClickAt commands in selenium. Where can I use the ClickAt command?

Answer 1

I noticed some differences between click() and clickAt() when testing a ExtJS app. For example, if I try to click a tab in a Ext.TabPanel, click() command does not work, although I provide it with an correct xpath, and clickAt() works fine. Code looks like this:

click("//li[@id='tab-panel-id__second-tab-id']/a[2]/em/span/span")

doesn't work, but

clickAt("//li[@id='tab-panel-id__second-tab-id']/a[2]/em/span/span","0,0")

works. Notice that coordinates are (0,0)

I can't figure out why this happens...