Invert text ccters

[Gert Klemmensen]

Hi,

I am trying to invert a text string on my SH-1106 display.
Tried with this code:

 GLCDCLS
  GLCDBackground = 1
  GLCDForeground = 0
  GLCDPrint(1, 0 , "Rotary Enc. Demo")
  GLCDPrint(1, 10 , "GCBASIC")

But only the first letter R in Rotary is inverted.
What am I doing wrong?

[Anobium]

Pass the background color as the 4th parameter. Does that resolve?

[Gert Klemmensen]

Thank you very much for your answer Anobium.

Didn't even notice there was a fourth parameter in the GLCDPrint command. 😯
It works in a way, but look at the attached image, there are some spaces between each character that are not inverted.

[Anobium]

Looks like this GLCD library needs a quick fix.

From my scan of the 1106 library.
- The space character is not inverted
- The background support is not correct
- No support for OLED fonts.

Joe the author has not touched this is many years.

I can update over the next few days. If you want it fixing.

Meanwhile... write the text in normal mode... and draw a box around the 'text'

Evan

[Gert Klemmensen]

Thanks for the lightning fast reply.

I would be very happy to get it fixed. I am working on a control where you can change parameters for 4-20mA sensor input with an encoder and here it will be easy to see when the selected parameter is displayed inverted.

Many thanks in advance!

[Anobium]

Give me a day or two.

Assume it is working in Program and I will release a fix ASAP. So, you can press on.

meanwhile... draw a filledbox() then GLCDprint into that box. Does that workaround?

[Gert Klemmensen]

That sounds great.

Ohh yes, filledbox works fine as a temporary workaround.

[Anobium]

OK. I will post again, soon. With a updated/replacement library.

[Anobium]

@Gert.

Attached is an updated library. You should update your existing library with this new version. See folder GCSTUDIO\GCBASIC\INCLUDE

---

The new library implements the following.

Support for inverted text
Support for GLCD_OLED_FONTS
Support to GLCD character width management

These changes bring the control of the GLCD characters to the same level of control as the ILI9341 and others.

---

Example code used.

#DEFINE GLCD_OLED_FONT  // Define this constant to use GLCD_OLED_FONT, GLCD_OLED_FONTs are smaller, faster and variable width characters, see the HELP.
#IFNDEF GLCD_OLED_FONT
    //Optionally, pull GCBASIC characters tighter, default is 7 for legacy GLCD fonts.
    // GLCDFontWidth = 6
#ENDIF

// Normal/default
GLCDBackground = 0
GLCDForeground = 1
GLCDPrint (0, 0, "GCBASIC")

// Inverted
GLCDBackground = 1
GLCDForeground = 0
GLCDPrint (0, 8, "GCBASIC")

// Will show nothing... as GLCDBackground is same as color parameter passed. 
GLCDBackground = 0
GLCDForeground = 1
GLCDPrint (0, 16, "GCBASIC", 0)

// Normal but using color paremeter 
GLCDBackground = 0
GLCDForeground = 1
GLCDPrint (0, 24, "GCBASIC", 1)

// Inverted but using color parameter 
GLCDBackground = 1
GLCDForeground = 0
GLCDPrint (0, 32, "GCBASIC", 0)

// Will show white chars and white background... as GLCDBackground is same as color parameter passed.
GLCDBackground = 1
GLCDForeground = 0
GLCDPrint (0, 40, "GCBASIC", 1)

[Gert Klemmensen]

@Anobium

This is great! I will update the library and start using it.

Thank you very much!!