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drawing lines in IDL [message #11516]

Tue, 31 March 1998 00:00

morph account
Messages: 4
Registered: March 1998

Junior Member

Does anyone know how to use the mouse to draw free hand lines over a
displayed image? The image is displayed in a window created with the
WIDGET_DRAW function. When I click the mouse over the image, I am able
to store the coordinates of mouse movement unit I click the mouse a
second time. I am able to display the line using the PLOT command,
however, the scaling of the plot area is different from the image area.
For example, I am unable to draw in the upper right portion of the image
because the drawing area is slightly smaller than the image area. This
draws a line, but not at the current position of the mouse.

If anyone knows how to correct this problem, or knows of a better
solution, I would greatly appreciate the information.

Thanks,
Steve Hartmann

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