This corresponds to screen two laid out to the right of screen one, with the right edge of screen one exactly matching the left edge of screen two. virtual screen one might go from 0 to 50 percent along the X axis and from 0 to 100 on the Y axis, while virtual screen two might go from 50 to 100 on X and also from 0 to 100 on Y. For this to work correctly, the guest and the host have to agree about which positions on the tablet correspond to which positions on the guest screens - e.g. 56 percent along the X axis from the left to the right edge and 73 percent along the Y axis from the top to the bottom edge. Unfortunately these positions are not in pixels on the screen, but in percentages - e.g. VirtualBox emulates a graphics tablet (similar to a touch screen), which can send exact positions instead of just "left", "right", "up", "down". When mouse integration is enabled, this becomes slightly more complicated. In this case, when the user moves the host pointer to the left, VirtualBox simulates left movement on the emulated mouse, and when the user clicks the right button a right button click is simulated on the guest mouse. The simplest case is when the host pointer is captured and VirtualBox is only emulating a standard (PS/2 or USB) mouse. In order to let the user control the guest system with the host input devices, VirtualBox emulates input devices inside the virtual machine. Please feel free to suggest improvements! ![]() ![]() This page gives a quick overview of the way (or ways) in which mouse input to virtual machines works in VirtualBox and some ways to get a closer look at what is happening in order to understand when things go wrong. Investigating problems with mouse input in VirtualBox Feedback about this page and suggestions for improvements are always welcome on the vbox-dev mailing list!
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