I have a circle that displays information in 1-degree increments -
there are 90 such increments that comprise the circle. I need a
pointer within the circle that rotates. The pointer must include areas
to the left and right of the center line so that a person is better
able to see when something is within 2 or 3 or 4 or 5 marks (degrees)
of its neighbors. I can use a line and get it to rotate - that is no
problem. The problem is drawing an arc and redrawing that arc every
time I rotate the pointer. The circle command allows me to draw an arc
as a pie-section. That is wonderful. But when I rotate the pointer,
how do I get the previous arc to go away, then draw the new arc
without having to redraw the entire form, which is too time-consuming?
I have tried a shape control, but that does not allow pie-sections to
be drawn. I have experimented with a picture box, an image box, and a
frame, but none of these are transparent and allow me to see something
underneath them (if I put my line control(s) within these containers).
In effect, all I want to do is keep drawing and redrawing new
pie-sections on top of my form when I rotate my pointer around the
wheel - without having to redraw everything from scratch each time I
move the pointer/arc.
Thanks for your help.
I have tried the below and it does not do what I want regarding
erasing the previous info before drawing the new info (in effect, is
there a cls command for the circle?):
Me.DrawMode = 12
Me.DrawStyle = 5
Me.FillColor = QBColor(14) 'gives a soft blue color on a gray
background form
Me.FillStyle = 0
Me.Circle (0, 0), outer_radius%, QBColor(14), -start_angle * PI /
180, -end_angle * PI / 180
---
Allen
