See video: https://youtu.be/bVJ3WBRHAEg
Note This video was made for teaching and demonstration of LV2UI. The use of GTK and Qt within plugins is not recommended.
Coding the GTK3 UI, main steps:
- create a container (box) as a top level widget (in constructor)
- create a vertical scale (slider)
- add the slider to the box
- set the slider value by values received from the plugin DSP
(in
portEvent) - define a callback function (
valueChangedCallback) to handle changed slider values - link the callback function (in constructor)
- send changed slider values to the plugin DSP
(in
valueChangedCallback)
Build:
- plugin DSP:
gcc myAmp.c -fvisibility=hidden -fPIC -DPIC -shared -pthread -lm `pkg-config --cflags --libs lv2` -o myAmp.so- UI:
g++ myAmp_GTK3.c -fvisibility=hidden -fPIC -DPIC -shared -pthread -lm `pkg-config --cflags --libs lv2 gtk+-3.0` -o myAmp_GTK3.so- Copy both .so files and the two .ttl files into a subfolder (e.g.: _myAmp_GTK3.lv2) of your lv2 directory.