Layout utils

src/ui/layout/mod.rs

@@ -27,6 +27,7 @@
 pub mod components;
 pub mod props;
 pub mod view;
+pub mod utils;
 
 // locals
 use props::{PropValue, Props, PropsBuilder};
@@ -61,20 +62,11 @@ pub enum Msg {
 #[derive(std::fmt::Debug, PartialEq, Eq)]
 pub enum Payload {
     Text(String),
-    Signed(isize),
+    //Signed(isize),
     Unsigned(usize),
     None,
 }
 
-// -- RenderData
-
-/// ## RenderData
-///
-/// RenderData is the object which contains data related to the component render
-pub struct RenderData {
-    pub cursor: usize, // Cursor position
-}
-
 // -- Component
 
 /// ## Component

src/ui/layout/utils.rs

@@ -0,0 +1,71 @@
+//! ## Utils
+//!
+//! `Utils` implements utilities functions to work with layouts
+
+/*
+*
+*   Copyright (C) 2020-2021 Christian Visintin - christian.visintin1997@gmail.com
+*
+* 	This file is part of "TermSCP"
+*
+*   TermSCP is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   TermSCP is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with TermSCP.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+use tui::layout::{Constraint, Direction, Layout, Rect};
+
+/// ### draw_area_in
+///
+/// Draw an area (WxH / 3) in the middle of the parent area
+pub fn draw_area_in(parent: Rect, width: u16, height: u16) -> Rect {
+    let new_area = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints(
+            [
+                Constraint::Percentage((100 - height) / 2),
+                Constraint::Percentage(height),
+                Constraint::Percentage((100 - height) / 2),
+            ]
+            .as_ref(),
+        )
+        .split(parent);
+    Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints(
+            [
+                Constraint::Percentage((100 - width) / 2),
+                Constraint::Percentage(width),
+                Constraint::Percentage((100 - width) / 2),
+            ]
+            .as_ref(),
+        )
+        .split(new_area[1])[1]
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    #[test]
+    fn test_ui_layout_utils_draw_area_in() {
+        let area: Rect = Rect::new(0, 0, 1024, 512);
+        let child: Rect = draw_area_in(area, 75, 30);
+        println!("{:?}", child);
+        assert_eq!(child.x, 43);
+        assert_eq!(child.y, 63);
+        assert_eq!(child.width, 271);
+        assert_eq!(child.height, 54);
+    }
+}