By Mossenbock H.
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Additional info for An object-oriented extension of Oberon
A Note Regarding this Version The original version of TR 109 is out of print and not available electronically. It is of historical interest in the development of the Oberon family of languages. It is now in electronic form for the benefit of the interested. Every effort has been made to stay faithful to the original, even to the point of replicating its layout and typography. B. ch Note, that Object Oberon was designed at a time when the Oberon language differed from what is now known as Oberon-1: • Separate DEFINITION and MODULE files, as in Modula-2.
SetOrigin(x, y) sets the origin to (x, y) relative to the left top corner of the frame. All other coordinates are relative to this origin. • SetGrid(g) sets the grid to g. • SetZoom(z) zooms the frame According to the factor 2 z. g. in EditFrame) to track the mouse and to get its actual (grid aligned) coordinates ( x, y) and the buttons pressed. The mouse grid itself is aligned to the frame origin. • EditFrame(x, y, buttons) is called automatically by the system whenever the mouse is within the frame and at least one mouse button was pressed.
G. in EditFrame) to track the mouse and to get its actual (grid aligned) coordinates ( x, y) and the buttons pressed. The mouse grid itself is aligned to the frame origin. • EditFrame(x, y, buttons) is called automatically by the system whenever the mouse is within the frame and at least one mouse button was pressed. Typically an overridden EditFrame method uses Trackmouse in order to perform interactive editing. EditFrame is empty in this class. • Restore(l, t, r, b) is called automatically by the system.