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use crate::render::layout::{Layout, LayoutPosition};
use crate::render::widget_cache::WidgetContainer;
use crate::render::widget_config::{PaddingConstraint, CONFIG_ORIGIN, CONFIG_SIZE};
use crate::render::{Points, Size, SIZE_HEIGHT, SIZE_WIDTH};
pub struct VerticalLayout {
widget_ids: Vec<i32>,
widget_positions: Vec<LayoutPosition>,
origin: Points,
size: Size,
padding: PaddingConstraint,
invalidated: bool,
}
impl VerticalLayout {
pub fn new(x: i32, y: i32, w: u32, h: u32, padding: PaddingConstraint) -> Self {
Self {
widget_ids: Vec::new(),
widget_positions: Vec::new(),
origin: vec![x, y],
size: vec![w, h],
padding,
invalidated: false,
}
}
}
impl Layout for VerticalLayout {
fn insert_widget(&mut self, widget_id: i32, widget_position: LayoutPosition) {
self.widget_ids.push(widget_id);
self.widget_positions.push(widget_position);
self.invalidated = true;
}
fn append_widget(&mut self, widget_id: i32) {
let positions = self.widget_positions.len();
let widget_position = if self.widget_positions.is_empty() {
LayoutPosition::new(0, 0)
} else {
LayoutPosition::new(self.widget_positions[positions - 1].x + 1, 0)
};
self.insert_widget(widget_id, widget_position);
}
fn set_padding(&mut self, padding: PaddingConstraint) {
self.padding = padding;
self.invalidated = true;
}
fn get_padding(&self) -> PaddingConstraint {
self.padding
}
fn do_layout(&mut self, _widgets: &[WidgetContainer]) {
if self.widget_ids.len() <= 1 {
return;
}
let offset_x: i32 = self.origin[0];
let offset_y: i32 = self.origin[1];
let num_widgets = self.widget_ids.len() as u32;
let widget_height = self.size[SIZE_HEIGHT] / num_widgets as u32;
let subtractor_bottom = ((self.padding.spacing as f64 / 2.0).ceil()) as u32;
let subtractor_top = ((self.padding.spacing as f64 / 2.0).floor()) as u32;
for i in 0..num_widgets {
let set_y: i32;
let mut set_height: u32 = widget_height;
let widget_id = self.widget_ids[i as usize];
if i == 0 {
set_y = (i * set_height) as i32 + self.padding.top;
set_height = widget_height - subtractor_bottom - self.padding.top as u32;
} else if i == num_widgets - 1 {
set_y = (i * set_height) as i32 + subtractor_top as i32;
set_height = widget_height - subtractor_top - self.padding.bottom as u32;
} else {
set_y = (i * set_height) as i32 + subtractor_top as i32;
set_height = widget_height - subtractor_top - subtractor_bottom;
}
_widgets[widget_id as usize]
.widget
.borrow_mut()
.get_config()
.set_point(
CONFIG_ORIGIN,
offset_x + self.padding.left,
offset_y + set_y,
);
_widgets[widget_id as usize]
.widget
.borrow_mut()
.get_config()
.set_size(
CONFIG_SIZE,
self.size[SIZE_WIDTH] - self.padding.right as u32 - self.padding.left as u32,
set_height,
);
_widgets[widget_id as usize]
.widget
.borrow_mut()
.get_config()
.set_invalidated(true);
}
self.invalidated = false;
}
fn needs_layout(&self) -> bool {
self.invalidated
}
}