2 Visual Components Manuals

Introduction to Visual Components 2.3
4.5.4 Ellipse and Circle
Ellipses and circles are static picture elements. They can be created in any size with individually adapted colors
in the picture editor. Drawing circles and ellipses is not supported on all displays. This hardware limitation is
taken into account by the editor if necessary.
4.5.4.1 Drawing Circles and Ellipses
Ellipses and circles can be drawn on the display by selecting the ellipse icon from the toolbar and clicking
on the screen. Pressing and holding the mouse button defines the starting point of the ellipse. Releasing the
mouse button defines where the ellipse is finished.
Drawing circles is simplified by holding down the Ctrl key while drawing. The editor ensures that the height and
width is the same and a circle is formed. The line width for a circle is always 1 pixel. The position and size of the
ellipse can be changed after it has been drawn.
Double−clicking on the circle opens up the Object Properties dialog box.
A circle can be drawn over other existing static
pictures. The circle is selected if a dashed rectangle
can be seen around it. It can now be made larger,
smaller, or be moved. Pressing the Del key deletes it.
Static picture elements can be drawn in any desired
layer.
If necessary, an exact ellipse or circle can be drawn
using the Grid or Snap−to−Grid Function.
4.5.4.2 Ellipse and Circle
4.5.4.2.1 Circle and Ellipse Properties
Circles can be drawn in different colors with or without being filled. The 'Object Properties' dialog box is used for
editing the properties of the circle.
Double−clicking on a circle opens the 'Object Properties' dialog box.
Under the Parameter tab, the corner points can be set
for a circle or ellipse. For this, the enveloping
rectangle can be defined in pixels using the Top, Left,
Right, and Bottom settings.
The Status Variable is of data type UINT. For ellipses,
bit 0 is responsible for determining whether the ellipse
is drawn or not.
BIT 0 == 1 − Circle not shown
BIT 0 == 0 − Circle shown
4.5.4 Ellipse and Circle 317