robtk facilitates creating LV2 plugins UIs with emphasis to allow porting existing gtk+ plugin UIs.
robtk provides implementations for these existing gtk+ widgets:
- label
- separator
- push button
- toggle button
- radio button
- spin box
- text combo-box
- drawing-area
as well as gtk+ container and layout objects:
- horizontal box
- vertical box
- table layout
and additional widgets
- x/y plot area
- rgb/rgba image
- (volume, gain) slider
- multi-state button
A subset of gtk's functionality and widgets were re-implemented in cairo. On compile-time GTK+ as well as openGL variants of the UI can be produced.
The complete toolkit consists of header files to be included with
the UI source-code and maps functions to the underlying implementation
e.g. robtk_lbl_new() to gtk_label_new().
no additional libraries or dependencies are required.
Similar to widgets and layout, the event-structure and callbacks of robtk lean onto the GTK API providing
- mouse-events: move, click up/down, scoll
- widget-events: enter, leave
- widget-allocation: size-request, allocate, position
- window-events: resize, limit-size
- widget-exposure: complete and partial redraw
robtk includes LV2-GUI wrappers and gnu-make definitions for easy use in a LV2 project. Currently it is used by meters.lv2, sisco.lv2, tuna.lv2 and mixtri.lv2