advotracker: reorganize the project using a crate based structure

* advotracker: the framework project
* crate/advotrackerdb: implementation of the database backend
* crate/advotrackerd: implementation of the backend (daemon)
* crate/adovtracker: implementaton of the application (CLI and GUI)

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

crates/advotracker_client/examples/messages_test/receiver/mod.rs

@@ -0,0 +1,5 @@
+/// The reciever state
+pub mod receiver_state;
+
+/// The receiver view
+pub mod receiver_view;

crates/advotracker_client/examples/messages_test/receiver/receiver_state.rs

@@ -0,0 +1,70 @@
+/*
+ * OrbTK - The Orbital Widget Toolkit
+ *
+ * Copyright 2021 Ralf Zerres <ralf.zerres@networkx.de>
+ * SPDX-License-Identifier: (0BSD or MIT)
+ */
+
+use orbtk::prelude::*;
+
+use crate::sender::sender_state::{SenderAction, SenderState};
+
+/// Enumeration of valid `action variants` that need to be handled as
+/// state changes for the `SenderView` widget.
+pub enum TestMessageAction {
+    // Toggle visibility of a message TextBox.
+    ToggleMessageBox
+}
+
+/// Valid `structure members` of the `ReceiverState` used to react on
+/// state changes inside the `ReceiverView` widget.
+#[derive(Default, AsAny)]
+pub struct ReceiverState {
+    message_box: Option<Entity>,
+    progress_bar: Entity
+}
+
+/// Method definitions, we provide inside the `ReceiverState`.
+impl ReceiverState {
+    fn toggle_message_box(&self, ctx: &mut Context) {
+        if let Some(message_box) = self.message_box {
+            ctx.get_widget(message_box)
+                .set("visibility", Visibility::Visible);
+        }
+    }
+}
+
+/// Trait methods provided for the `SenderState`
+impl State for ReceiverState {
+    // initialize the view entities
+    fn init(&mut self, _: &mut Registry, ctx: &mut Context) {
+        self.progress_bar = ctx.entity_of_child("progress_bar")
+            .expect("Cannot find ProgressBar!");
+    }
+
+    // handle messages targeting the view
+    fn messages(
+        &mut self,
+        mut messages: MessageReader,
+        _registry: &mut Registry,
+        ctx: &mut Context
+    ) {
+        for message in messages.read::<SenderAction>() {
+            match message {
+                SenderAction::UpdateProgress(amount) => {
+                    println!("Message received");
+                    let mut progress_bar = ctx.get_widget(self.progress_bar);
+                    let current_progress = progress_bar.clone::<f64>("val");
+                    progress_bar.set::<f64>("val", current_progress + amount);
+                }
+            }
+        }
+        for action in messages.read::<TestMessageAction>() {
+            match action {
+                TestMessageAction::ToggleMessageBox => {
+                    self.toggle_message_box(ctx);
+                }
+            }
+        }
+    }
+}

crates/advotracker_client/examples/messages_test/receiver/receiver_view.rs

@@ -0,0 +1,37 @@
+/*
+ * OrbTK - The Orbital Widget Toolkit
+ *
+ * Copyright 2021 Ralf Zerres <ralf.zerres@networkx.de>
+ * SPDX-License-Identifier: (0BSD or MIT)
+ */
+
+use orbtk::prelude::*;
+
+use crate::receiver::receiver_state::{TestMessageAction, ReceiverState};
+
+widget!(ReceiverView<ReceiverState>);
+
+impl Template for ReceiverView {
+    fn template(self, _id: Entity, bc: &mut BuildContext) -> Self {
+        self.name("ReceiverView")
+            .child(
+                Stack::new()
+                    .orientation("vertical")
+                    .spacing(16)
+                    .child(
+                        ProgressBar::new()
+                            .id("progress_bar")
+                            .build(bc)
+                    )
+                    .child(
+                        TextBox::new()
+                            .id("message_box")
+                            .h_align("center")
+                            .text("message received. Box toggled!")
+                            .visibility("hidden")
+                            .build(bc)
+                    )
+                    .build(bc)
+            )
+    }
+}