Download e-book for kindle: An object-oriented extension of Oberon by Mossenbock H.

By Mossenbock H.

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Extra resources for An object-oriented extension of Oberon

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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. Typically an overridden EditFrame method uses Trackmouse in order to perform interactive editing. EditFrame is empty in this class.

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. Typically an overridden EditFrame method uses Trackmouse in order to perform interactive editing. EditFrame is empty in this class.

Clear erases the frame. • Show causes the whole frame to be redrawn by calling Restore. • Hide sets the internal clipping rectangle to zero extension. • Resize(r, b) causes the extended part of the frame to be redrawn by calling Restore after setting the clipping rectangle appropriately. • Move(dx, dy) moves the frame including its origin by dx, dy without drawing it on the screen. • Copy(f) returns a deep copy of the receiver in f. If f=NIL before the call, it gets the class of the receiver.

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An object-oriented extension of Oberon by Mossenbock H.


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