3.3 Text Commands
In this section commands are identified by their names and decimal values.
3.3.1 Auto Scroll On (254 81)
When auto scrolling is on, it causes the display to shift the entire display’s contents up to make room for
a new line of text when the text reaches the scroll position defined by the "Set font metrics" command in the
display memory (normally, the bottom right character position - default value for the GLC24064 is 64).
3.3.2 Auto Scroll Off (254 82)
When auto scrolling is disabled, text will wrap to the top left corner of the display area. Existing graphics
or text in the display area are not erased before text is placed. When using proportional fonts without auto
scrolling, care should be taken to clear areas where text is being written, particularly when wrapping occurs.
This may be done using the “Draw solid rectangle” command with the color set to white.
3.3.3 Set Text Insertion Point (254 71 [col] [row])
This command sets the insertion point to the [column] and [row] specified. The insertion point is posi-
tioned using the base size of the current font (this command does not position the insertion point at a specific
pixel). The pixel column used is determined by multiplying the width of the widest character in the font
by [column]. The pixel row used is determined by multiplying the height of the font by [row + interline
spacing]. If precise pixel-based text positioning is required, see "Set text insertion point - pixel values",
below.
3.3.4 Set Current Text Insertion Point to top Left (254 72)
This command moves the text insertion point to the top left of the display area, based on the metrics of
the current font. Refer to the "Set font metrics" command below for more details.
3.3.5 Set Text Insertion Point Using Pixel Values (254 121 [x][y])
This command sets the next position for text placement to an individual pixel location. The coordinate
([x position],[y position]) defines a pixel on the screen where the top left corner of the screen is defined as
(0,0). This pixel location will be used as the top left corner of the next character of text which is sent to the
module without any regard to ’font metrics’ like character spacing or line spacing.
Matrix Orbital
GLC24064
15
