hello,
I’m looking for an example on how to create custom widget : I want to be able to create something similar to a light, but using a custom svn image.
I.E : to be able to draw or not an image on top of the module.
what is the most simple way?
(I found answer for custom switch, but I don’t need the user interaction part)
Maybe there is an easier way, but what I would do is make a new custom widget inheriting from TransparentWidget which basically copies SvgButton without the click functionality. I think this is what the widget should look like, but WARNING: I didn’t actually run this code so there are probably errors.
struct ChCustomWidget : TransparentWidget {
ChModule *module;
widget::FramebufferWidget *fb;
widget::SvgWidget *sw;
ChCustomWidget() {
addFrame(APP->window->loadSvg(asset::plugin(chPluginInstance,"res/svg1.svg"));
addFrame(APP->window->loadSvg(asset::plugin(chPluginInstance,"res/svg2.svg"));
}
void addFrame(std::shared_ptr<Svg> svg) {
frames.push_back(svg);
// If this is our first frame, automatically set SVG and size
if (!sw->svg) {
sw->setSvg(svg);
box.size = sw->box.size;
fb->box.size = sw->box.size;
}
};
void draw(const DrawArgs &args) override {
if (module) {
sw->setSvg(frames[module->svgIndex]);
fb->dirty = true;
}
else {
}
}
}
Your Module (of type ChModule in my example) must have a member svgIndex which tells the widget which svg to show. Instantiate the ChCustomWidget in your ModuleWidget constructor like this:
I adapted @computerscare 's code and got it working. One big difference is that I pass in a pointer to a boolean instead of a pointer to the entire module. I’m hoping that this will make the code more reusable between different modules.
Here’s what I came up with:
struct StepLightWidget : SvgWidget
{
bool *state_bool_ptr = NULL;
std::vector<std::shared_ptr<window::Svg>> frames;
StepLightWidget(bool *state)
{
addFrame(APP->window->loadSvg(asset::plugin(pluginInstance, "res/groovebox/groove_box_led.svg")));
addFrame(APP->window->loadSvg(asset::plugin(pluginInstance, "res/groovebox/groove_box_led_lit.svg")));
this->state_bool_ptr = state;
}
void addFrame(std::shared_ptr<Svg> svg)
{
this->frames.push_back(svg);
// If this is our first frame, automatically set SVG and size
if (!this->svg)
{
this->setSvg(svg);
box.size = svg->getSize();
}
};
void step() override
{
SvgWidget::step();
if (state_bool_ptr != NULL)
{
this->setSvg(frames[(*state_bool_ptr) ? 1 : 0]);
}
else
{
this->setSvg(frames[0]);
}
}
};
And here’s how I add it to the ModuleWidget constructor:
StepLightWidget *step_light_widget = new StepLightWidget((module) ? &module->light_status_boolean : &dummy_boolean);
step_light_widget->box.pos = Vec(20.0, 20.0); // Adjust this to place it where you want it
addChild(step_light_widget);
// Where dummy_boolean is defined in the module widget as bool dummy_boolean = false;