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Annotation of os232sdk/toolkt20/c/samples/edpline/readme, revision 1.1

1.1     ! root        1: Comments about EDPLINE (Edit Polyline)
        !             2: 
        !             3: 
        !             4: This program is a prototype for the standard mouse interface of
        !             5: dragging points around and rubberbanding primitives.
        !             6: 
        !             7: 
        !             8: To use:
        !             9: -------
        !            10: 
        !            11: To add or move points, click on the LEFT mouse button.
        !            12: 
        !            13:   If you click within about 3 pels of an existing point, you can drag it
        !            14:     around in the usual way.
        !            15: 
        !            16:   If you click within about 3 pels of an existing line, but not near a
        !            17:     point, you will insert a point between the endpoints of the nearest line
        !            18:     segment.
        !            19: 
        !            20:   Otherwise, you will append a control point to the list.
        !            21: 
        !            22: 
        !            23: To remove points, click on a point with the RIGHT mouse button.
        !            24: 
        !            25:   You can drag the point around, but it will disappear as
        !            26:   soon as you lift up on the mouse button.
        !            27: 
        !            28: 
        !            29: The primitives can be displayed independently, and show up in different
        !            30: colors so they can be distinguished (especially near endpoints).  Selecting
        !            31: "None" clears all the selected primitives.
        !            32: 
        !            33: Rubberbanding is done by drawing in xor mode, so for each movement
        !            34: you will draw the object twice.  When moving, adding, or removing control
        !            35: points, only the one currently selected will be drawn.
        !            36: 
        !            37: There's a limit of 20 control points.  If you try to add more than that,
        !            38: a message box appears. There's a bug that forces you to click twice after
        !            39: closing down the error message box before you can grab a point for moving
        !            40: or removing.

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