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# isigraph events

An isigraph control supports character and mouse events. The Code Dialog in the form editor lists all events for an isigraph control.

char | isij with boxes
size | resize event (OpenGL, gl2 must request with glwantresize)
paint | paint event (OpenGL only)
mmove | mouse move event
mbldbl | mouse button left double-click
mbldown | mouse button left down
mblup | mouse button left up
mbrdbl | mouse button right double-click
mbrdown | mouse button right down
mbrup | mouse button right up

For mouse events the wdhandler variable sysdata contains:
x y width height leftbutton rightbutton ctrl shift

The x y width and height are in pixels and the other values are 1 if the corresponding button or key was down when the event occurred.

For a char event sysdata contains the value of the character. Characters, such as HOME, END, or the arrow keys are returned as 128+VK_name (virtual key) as defined in packages\graphics\vkeys.js.

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