MouseDownAndKeys

MouseDownAndKeys is a simple extension of the MouseEventsInViews sample that shows how to specify that you want the mouse location in local rather than global coordinates and how to find out what modifier keys were down when you receive the mouse event.

Running the sample

Execute MouseDownAndKeysSApp. Click any mouse button in one of the views. The view reports the location of the mouse click.

Files and classes

TMouseInputView is defined in MouseInputView.h and MouseInputView.C. It is basically the same as the version in MouseEventsInViews, except for two differences: 1) It calls SetCoordinateView in HandleAfterConnectiontoViewRoot, passing a TViewHandle on itself, to get the events reported in its own coordinate system. 2) It queries the state of the keyboard that corresponds to the current event by using a static member function of TKeyboardInputDevice, GetDefaultKeyBoardInputDevice, and asking the returned TKeyBoardInputDevice about its state.

Notes

There is at present no real way of associating input devices with each other and, in particular, no real support for multiple devices of the same kind. So the term "default" is a bit misleading--the device returned is the only keyboard device, not one of many, or one that's specifically associated with the mouse.

If you are writing new devices, follow the example set by the keyboard and mouse devices, and define similar static member functions that support this kind of query.

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