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- Comments about EDPLINE (Edit Polyline)
-
-
- This program is a prototype for the standard mouse interface of
- dragging points around and rubberbanding primitives.
-
-
- To use:
- -------
-
- To add or move points, click on the LEFT mouse button.
-
- If you click within about 3 pels of an existing point, you can drag it
- around in the usual way.
-
- If you click within about 3 pels of an existing line, but not near a
- point, you will insert a point between the endpoints of the nearest line
- segment.
-
- Otherwise, you will append a control point to the list.
-
-
- To remove points, click on a point with the RIGHT mouse button.
-
- You can drag the point around, but it will disappear as
- soon as you lift up on the mouse button.
-
-
- The primitives can be displayed independently, and show up in different
- colors so they can be distinguished (especially near endpoints). Selecting
- "None" clears all the selected primitives.
-
- Rubberbanding is done by drawing in xor mode, so for each movement
- you will draw the object twice. When moving, adding, or removing control
- points, only the one currently selected will be drawn.
-
- There's a limit of 20 control points. If you try to add more than that,
- a message box appears. There's a bug that forces you to click twice after
- closing down the error message box before you can grab a point for moving
- or removing.
-