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use super::GraphNode;
use crate::graphics::*;
// inactive - culoara data de mine
// selected - culoarea data de mine
// focus - culoarea data de utilizator (sau daca e None - culoarea sugerata de mine)
// normal - culoarea data de mine
// pentru margine si pentru text
pub struct Node<T: GraphNode> {
pub(super) obj: T,
pub(super) rect: Rect,
pub(super) border: Option<LineType>,
pub(super) text_align: TextAlignment,
pub(super) text_attr: Option<CharAttribute>,
pub(super) edges_in: Vec<u32>,
pub(super) edges_out: Vec<u32>,
pub(super) filtered: bool,
/// Multi-selection membership when multi-select mode is enabled on the owning `GraphView`.
pub(super) selected: bool,
}
impl<T> Node<T>
where
T: GraphNode,
{
/// Returns a reference to the user data (`T`) stored in this node.
pub fn value(&self) -> &T {
&self.obj
}
/// Whether this node is included in the multi-selection set (only meaningful when multi-select UI is enabled).
#[inline(always)]
pub fn is_selected(&self) -> bool {
self.selected
}
/// Label size derived from the current bounds (inverse of [`Node::resize`](Self::resize) padding rules).
///
/// `multiselect_ui` must match how this node’s `rect` was last laid out (same flag passed to [`Node::resize`](Self::resize)).
pub(super) fn label_content_size(&self, multiselect_ui: bool) -> Size {
let gutter = if multiselect_ui { 2u32 } else { 0u32 };
let mut w = self.rect.width();
let mut h = self.rect.height();
if self.border.is_some() {
w = w.saturating_sub(2);
h = h.saturating_sub(2);
// Bordered + multi-select: first inner row is reserved for ☑/☐ (see `resize` / `paint`).
if multiselect_ui {
h = h.saturating_sub(1);
}
} else {
w = w.saturating_sub(2);
}
w = w.saturating_sub(gutter);
Size::new(w, h)
}
pub(super) fn resize(&mut self, mut size: Size, multiselect_ui: bool) {
let p = self.rect.top_left();
let gutter = if multiselect_ui { 2u32 } else { 0u32 };
if self.border.is_some() {
// First inner row for checkbox when multi-select is on (glyph on first row of frame).
if multiselect_ui {
size.height += 1;
}
// 2 characters (left/right for the border)
// 2 characters (top/bottom for the border)
size.width += 2;
size.height += 2;
} else {
// one extra space on left and right
size.width += 2;
}
size.width += gutter;
self.rect = Rect::with_point_and_size(p, size);
}
#[inline]
pub(super) fn contains(&self, x: i32, y: i32) -> bool {
self.rect.contains(Point::new(x, y))
}
pub(super) fn paint(&self, surface: &mut Surface, attr: CharAttribute, out: &mut String, multiselect_ui: bool) {
surface.fill_rect(self.rect, Character::with_attributes(' ', attr));
let mut clip_rect = if let Some(line_type) = self.border {
surface.draw_rect(self.rect, line_type, attr);
Rect::new(self.rect.left() + 1, self.rect.top() + 1, self.rect.right() - 1, self.rect.bottom() - 1)
} else {
self.rect
};
// paint the checkbox
if multiselect_ui {
surface.write_char(
clip_rect.left(),
clip_rect.top(),
Character::with_attributes(if self.selected { '☑' } else { '☐' }, attr),
);
clip_rect.set_left(clip_rect.left() + 2, false);
}
// paint the text
if self.obj.write_label(out, clip_rect.size()).is_err() {
out.clear();
out.push_str("???");
}
let w = clip_rect.width() as u16;
let x = match self.text_align {
TextAlignment::Left => clip_rect.left(),
TextAlignment::Center => {
let mut len = 0;
for c in out.chars() {
if c == '\n' || c == '\r' {
break;
} else {
len += 1;
if len >= w {
break;
}
}
}
if ((len + w) & 1) ==0 {
// ambele pare sau ambele impare
clip_rect.left() + (w / 2) as i32
} else {
clip_rect.center_x()
}
}
TextAlignment::Right => clip_rect.right(),
};
let format = TextFormatBuilder::new()
.align(self.text_align)
.attribute(attr)
.wrap_type(WrapType::WordWrap(w))
.position(x, clip_rect.top())
.build();
surface.set_relative_clip(clip_rect.left(), clip_rect.top(), clip_rect.right(), clip_rect.bottom());
surface.write_text(out, &format);
surface.reset_clip();
}
}
pub struct NodeBuilder<T>
where
T: GraphNode,
{
node: Node<T>,
size: Option<Size>,
}
impl<T> NodeBuilder<T>
where
T: GraphNode,
{
/// Create a new NodeBuilder
pub fn new(obj: T) -> Self {
Self {
node: Node {
obj,
rect: Rect::new(0, 0, 0, 0),
border: None,
text_align: TextAlignment::Center,
text_attr: None,
edges_in: Vec::new(),
edges_out: Vec::new(),
filtered: false,
selected: false,
},
size: None,
}
}
/// Set a border for the node
pub fn border(mut self, line_type: LineType) -> Self {
self.node.border = Some(line_type);
self
}
/// Set the text attribute for the node label and border
/// If not set, the default attribute will be used
/// These attributes will only be used if the graphview control is focused and the node is not filtered
pub fn text_attribute(mut self, attr: CharAttribute) -> Self {
self.node.text_attr = Some(attr);
self
}
/// Set the text alignment for the node label (default is center)
pub fn text_alignment(mut self, align: TextAlignment) -> Self {
self.node.text_align = align;
self
}
/// Set the size of the node (if not set, the prefered size as it is returned by the GraphNode implementation will be used)
pub fn size(mut self, size: Size) -> Self {
self.size = Some(size);
self
}
/// Set the position of the node (top-left corner)
pub fn position(mut self, p: Point) -> Self {
self.node.rect.set_left(p.x, true);
self.node.rect.set_top(p.y, true);
self
}
/// Builds the actual node. If the size was not set, the prefered size as it is returned by the GraphNode implementation will be used
#[inline(always)]
pub fn build(mut self) -> Node<T> {
if let Some(size) = self.size {
self.node.resize(size, false);
} else {
let sz = self.node.obj.prefered_size();
self.node.resize(sz, false);
}
self.node
}
}
pub struct EditableNode<'a, T: GraphNode + 'a> {
node: &'a mut Node<T>,
changed: &'a mut bool,
}
impl<'a, T> EditableNode<'a, T>
where
T: GraphNode + 'a,
{
pub(super) fn new(node: &'a mut Node<T>, changed: &'a mut bool) -> Self {
Self { node, changed }
}
/// Returns an immutable reference to the node's user data.
#[inline(always)]
pub fn value(&self) -> &T {
&self.node.obj
}
/// Returns a mutable reference to the node's user data.
#[inline(always)]
pub fn value_mut(&mut self) -> &mut T {
&mut self.node.obj
}
/// Replaces the node's user data and marks the graph as changed.
#[inline(always)]
pub fn set_value(&mut self, value: T) {
self.node.obj = value;
*self.changed = true;
}
/// Returns the node's bounding rectangle in graph coordinates.
#[inline(always)]
pub fn bounds(&self) -> Rect {
self.node.rect
}
/// Sets the node's bounding rectangle. No-op if unchanged; otherwise marks the graph as changed.
#[inline(always)]
pub fn set_bounds(&mut self, r: Rect) {
if self.node.rect != r {
self.node.rect = r;
*self.changed = true;
}
}
/// Returns the top-left corner of the node's bounds.
#[inline(always)]
pub fn position(&self) -> Point {
self.node.rect.top_left()
}
/// Moves the node so its top-left is `p`, preserving size.
#[inline(always)]
pub fn set_position(&mut self, p: Point) {
self.set_bounds(Rect::with_point_and_size(p, self.node.rect.size()));
}
/// Returns the width and height of the node's bounds.
#[inline(always)]
pub fn size(&self) -> Size {
self.node.rect.size()
}
/// Resizes the node, keeping its current top-left corner.
#[inline(always)]
pub fn set_size(&mut self, size: Size) {
self.set_bounds(Rect::with_point_and_size(self.node.rect.top_left(), size));
}
/// Returns how the label text is aligned inside the node.
#[inline(always)]
pub fn text_alignment(&self) -> TextAlignment {
self.node.text_align
}
/// Sets label text alignment. Marks the graph as changed if the value differs.
#[inline(always)]
pub fn set_text_alignment(&mut self, align: TextAlignment) {
if self.node.text_align != align {
self.node.text_align = align;
*self.changed = true;
}
}
/// Returns the optional custom text (and border) attribute when the control is focused.
#[inline(always)]
pub fn text_attribute(&self) -> Option<CharAttribute> {
self.node.text_attr
}
/// Sets a custom text attribute. Marks the graph as changed if the value differs.
#[inline(always)]
pub fn set_text_attribute(&mut self, attr: CharAttribute) {
if self.node.text_attr != Some(attr) {
self.node.text_attr = Some(attr);
*self.changed = true;
}
}
/// Clears a previously set text attribute so theme defaults apply.
#[inline(always)]
pub fn clear_text_attribute(&mut self) {
if self.node.text_attr.is_some() {
self.node.text_attr = None;
*self.changed = true;
}
}
/// Returns the border line style, if any.
#[inline(always)]
pub fn border(&self) -> Option<LineType> {
self.node.border
}
/// Sets the border style. Ensures minimum height when enabling a border. Marks the graph as changed if needed.
#[inline(always)]
pub fn set_border(&mut self, border: LineType) {
if self.node.border != Some(border) {
self.node.border = Some(border);
if self.node.rect.height() < 3 {
self.node.rect.set_bottom(self.node.rect.top() + 2, false);
}
*self.changed = true;
}
}
/// Removes the node's border. Marks the graph as changed if a border was present.
#[inline(always)]
pub fn clear_border(&mut self) {
if self.node.border.is_some() {
self.node.border = None;
*self.changed = true;
}
}
/// Sets the node's selected state. Marks the graph as changed if the value differs.
#[inline(always)]
pub fn set_selected(&mut self, selected: bool) {
if self.node.selected != selected {
self.node.selected = selected;
*self.changed = true;
}
}
/// Returns whether the node is selected.
#[inline(always)]
pub fn is_selected(&self) -> bool {
self.node.selected
}
}