void Fl_Cairo_Window_Wrapper::draw_cb(Fl_Cairo_Window *self, cairo_t *ctx) {
Dart_PersistentHandle *ref = (Dart_PersistentHandle*)self -> user_data();
// Create instance of CairoContext.
Dart_Handle dartCairoContextType = HandleError(Dart_GetType(
Dart_LookupLibrary(
Dart_NewStringFromCString("package:fltk/fltk.dart")),
Dart_NewStringFromCString("CairoContext"), 0, {}));
Dart_Handle dartCairoContext = Dart_New(
dartCairoContextType, Dart_EmptyString(), 0, {});
// Link cairo context to CairoContext.
Dart_SetNativeInstanceField(dartCairoContext, 0, (intptr_t)ctx);
Dart_Handle args[1] = { dartCairoContext };
HandleError(Dart_Invoke(*ref, Dart_NewStringFromCString("runDrawCb"), 1, args));
}
Dart_Handle DartConverter<TextBox>::ToDart(const TextBox& val) {
if (val.is_null)
return Dart_Null();
DartClassLibrary& class_library = DartState::Current()->class_library();
Dart_Handle type = Dart_HandleFromPersistent(
class_library.GetClass("ui", "TextBox"));
DCHECK(!LogIfError(type));
const int argc = 5;
Dart_Handle argv[argc] = {
blink::ToDart(val.sk_rect.fLeft),
blink::ToDart(val.sk_rect.fTop),
blink::ToDart(val.sk_rect.fRight),
blink::ToDart(val.sk_rect.fBottom),
blink::ToDart(static_cast<int>(val.direction)),
};
return Dart_New(type, blink::ToDart("_"), argc, argv);
}
Dart_Handle Isolate::New(const char* typeName, int argc, Dart_Handle* args)
{
// entering and leaving the scope here causes us to invalidate the instance handle!
// Dart_EnterScope();
// Get type
Dart_Handle type = Dart_GetType(library_, NewString(typeName), 0, NULL);
if(Dart_IsError(type)) {
LOG_E(Dart_GetError(type));
}
// Invoke the unnamed constructor.
Dart_Handle instance = Dart_New(type, Dart_Null(), argc, args);
if (Dart_IsError(instance)) {
// Dart_NewApiError
LOG_E(Dart_GetError(instance) << " while instantiating '"<< type <<"'")
}
// Dart_ExitScope();
return instance;
}