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Lee Lup Yuen 2023-01-25 15:58:54 +08:00
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@ -6034,9 +6034,23 @@ Now that our background processing is ready, let's render the LVGL Widgets for o
# Render Terminal with LVGL Widgets
TODO: Use the [LVGL Keyboard Widget](https://docs.lvgl.io/master/widgets/keyboard.html)
Our LVGL Terminal will have 3 LVGL Widgets...
[lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/a37872d85c865557bee740cecd6adc35ae3197d2/examples/lvgldemo/lvgldemo.c#L374-L415)
- [LVGL Text Area Widget](https://docs.lvgl.io/master/widgets/textarea.html) that shows the NSH Output
(At the top)
- [LVGL Text Area Widget](https://docs.lvgl.io/master/widgets/textarea.html) for NSH Input, to enter commands
(At the middle)
- [LVGL Keyboard Widget](https://docs.lvgl.io/master/widgets/keyboard.html) for typing commands into NSH Input
(At the bottom)
![Set Default Font to Monospace](https://lupyuen.github.io/images/lvgl2-terminal2.jpg)
This is how we render the 3 LVGL Widgets: [lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/a37872d85c865557bee740cecd6adc35ae3197d2/examples/lvgldemo/lvgldemo.c#L374-L415)
```c
// PinePhone LCD Panel Width and Height (pixels)
@ -6083,15 +6097,23 @@ static void create_widgets(void) {
}
```
`input_callback` is the Callback Function for our LVGL Keyboard. Which we'll cover in a while.
Note that we're using the LVGL Default Font for all 3 LVGL Widgets. Which has a problem...
# Set LVGL Terminal Font to Monospace
Our LVGL Terminal looks nicer with a Monospace Font. But watch what happens if we change the LVGL Default Font from Montserrat 20 (proportional) to UNSCII 16 (monospace)...
Our LVGL Terminal looks nicer with a Monospace Font.
But watch what happens if we change the LVGL Default Font from Montserrat 20 (proportional) to UNSCII 16 (monospace)...
![Set Default Font to Monospace](https://lupyuen.github.io/images/lvgl2-terminal2.jpg)
The LVGL Keyboard has missing symbols: Enter, Backspace, ...
The LVGL Keyboard has missing symbols! Enter, Backspace, ...
Thus we set the LVGL Default Font back to Montserrat 20. And we set the Font Style for NSH Input and Output to UNSCII 16: [lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/58537ff2c0111e89c4bbe23a5683dc561fad6881/examples/lvgldemo/lvgldemo.c#L405-L422)
Thus we set the LVGL Default Font back to Montserrat 20.
And instead we set the Font Style for NSH Input and Output to UNSCII 16: [lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/58537ff2c0111e89c4bbe23a5683dc561fad6881/examples/lvgldemo/lvgldemo.c#L405-L422)
```c
// Set the Font Style for NSH Input and Output to a Monospaced Font
@ -6110,10 +6132,12 @@ Thus we set the LVGL Default Font back to Montserrat 20. And we set the Font Sty
...
```
Now we see the LVGL Keyboard without missing symbols...
Now we see the LVGL Keyboard without missing symbols (pic below)...
- [Watch the Demo on YouTube](https://www.youtube.com/watch?v=WdiXaMK8cNw)
Let's look at our Callback Function for the LVGL Keyboard...
![Set Terminal Font to Monospace](https://lupyuen.github.io/images/lvgl2-terminal3.jpg)
# Handle Input from LVGL Keyboard
@ -6168,6 +6192,8 @@ static void input_callback(lv_event_t *e) {
}
```
# Handle Output from NSH Shell
TODO: Write the NSH Output to LVGL Label Widget
[lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/a37872d85c865557bee740cecd6adc35ae3197d2/examples/lvgldemo/lvgldemo.c#L320-L372)