[1.8][Solved] Problem with mouse coordinates on GUI

[badner]

Hi,

 

I have a problem with the mouse position on different gui.

 

Picture 1:   http://www.pic-upload.de/view-28275565/pic1.png.html    ---> GuiMain

 

mouseclick to button "Details" open a new gui/window:

mc.displayGuiScreen(null); //<--- close GuiMain 
mc.displayGuiScreen(new GuiDetails(someStuff));  //<--- open gui/window GuiDetails

 

Picture 2:   http://www.pic-upload.de/view-28275596/pic2.png.html  ---> GuiDetails

 

I expect the mouse position on the same coordinates (x, y -> red triangle) like on the GuiMain, but the mouse position is at the cross at the center of the screen (red circle).

 

How can I pass the x, y coordinates of the mouse position from GuiMain to GuiDetails?