use super::*;
use crate::canvas::*;
use crossterm::event::{Event, KeyCode, KeyModifiers};
use std::rc::Rc;
pub type NumericValueChangedCallback = dyn Fn(&mut Numeric);
pub type NumericKeyHandler = fn(&mut Numeric, event: &mut WindowEvent);
pub struct Numeric {
base: WidgetBase,
has_focus: bool,
value: i32,
stepcount: u8,
radix: Radix,
callback: Rc<NumericValueChangedCallback>,
key_handler: NumericKeyHandler,
focus_color: Option<Color>,
min_range: i32,
max_range: i32,
}
impl Default for Numeric {
fn default() -> Self {
let mut slf = Self {
base: WidgetBase::default(),
has_focus: false,
value: 0,
stepcount: 1,
radix: Radix::Decimal,
callback: Rc::new(Self::default_callback),
key_handler: Self::default_key_handler,
focus_color: None,
min_range: i32::MIN,
max_range: i32::MAX,
};
slf.base.constraints.x.min = NonZero::new(3).unwrap();
slf.value_changed_hook();
slf
}
}
impl Numeric {
pub const ARROW_UP: Grapheme = ScrollViewer::ARROW_UP;
pub const ARROW_DOWN: Grapheme = ScrollViewer::ARROW_DOWN;
pub const ARROW_UP_DISABLED: Grapheme = ScrollViewer::ARROW_UP_DISABLED;
pub const ARROW_DOWN_DISABLED: Grapheme = ScrollViewer::ARROW_DOWN_DISABLED;
pub const NUMERIC_PLACEHOLDER: Grapheme = Grapheme::new_unchecked("x", GlyphWidth::Half);
pub fn default_key_handler(&mut self, event: &mut WindowEvent) {
if let Event::Key(k) = event.raw() {
if k.modifiers.contains(KeyModifiers::ALT) {
if k.code == KeyCode::Up {
self.step_up();
event.handled = true;
}
else if k.code == KeyCode::Down {
self.step_down();
event.handled = true;
}
}
}
}
pub fn default_callback(_: &mut Self) {}
pub fn set_changed_value_callback<F: Fn(&mut Numeric) + 'static>(&mut self, callback: F) {
self.callback = Rc::new(callback);
}
pub fn set_key_handler(&mut self, f: NumericKeyHandler) {
self.key_handler = f;
}
pub fn set_min_range(&mut self, min_range: i32) {
if self.min_range < self.max_range {
self.min_range = min_range;
if !(self.min_range..self.max_range).contains(&self.value) {
self.value = self.min_range;
self.value_changed_hook();
}
}
}
pub fn set_max_range(&mut self, max_range: i32) {
if self.max_range > self.min_range {
self.max_range = max_range;
if !(self.min_range..self.max_range).contains(&self.value) {
self.value = self.min_range;
self.value_changed_hook();
}
}
}
pub fn set_value(&mut self, value: i32) {
self.value = value;
self.value_changed_hook();
}
pub fn get_value(&self) -> i32 {
self.value
}
pub fn set_base(&mut self, base: Radix) {
if base != self.radix {
self.radix = base;
self.value_changed_hook();
}
}
pub fn get_base(&self) -> Radix {
self.radix
}
pub fn step_up(&mut self) {
let cb = self.callback.clone();
if self.value <= self.max_range - self.stepcount as i32 {
self.value += self.stepcount as i32;
}
else {
self.value = self.max_range;
}
self.value_changed_hook();
cb(self);
}
pub fn step_down(&mut self) {
let cb = self.callback.clone();
if self.value > self.min_range + self.stepcount as i32 {
self.value -= self.stepcount as i32;
}
else {
self.value = self.min_range;
}
self.value_changed_hook();
cb(self);
}
pub fn get_stepcount(&self) -> u8 {
self.stepcount
}
pub fn set_stepcount(&mut self, stepcount: u8) {
self.stepcount = stepcount;
}
pub fn set_focus_color(&mut self, color: Option<Color>) {
self.focus_color = color;
}
fn value_changed_hook(&mut self) {
let old = self.base.constraints.x.max;
self.base.constraints.x.max = Size::Fixed(
NonZero::new(
self.radix.prefix_glyphs().len() as TSize
+ self
.value
.abs()
.checked_ilog(self.radix as i32)
.unwrap_or(0) as TSize
+ self.base.constraints.x.min.get()
+ self.value.is_negative() as TSize,
)
.unwrap(),
);
if old != self.base.constraints.x.max {
self.provoke_changed_property(WindowProperty::Size);
}
}
}
impl Window for Numeric {
fn render(&self, canvas: &mut Canvas) {
let len = self
.value
.abs()
.checked_ilog(self.radix as i32)
.unwrap_or(0) as TSize
+ 1;
let updown = 2;
let mut row = canvas.get_row(0, GlyphWidth::Half).unwrap();
row.get(row.length() - 1)
.unwrap()
.set_grapheme(Self::ARROW_UP)
.unwrap();
row.get(row.length() - 2)
.unwrap()
.set_grapheme(Self::ARROW_DOWN)
.unwrap();
if self.value == self.max_range {
row.get(row.length() - 1)
.unwrap()
.set_grapheme(Self::ARROW_UP_DISABLED)
.unwrap();
}
else if self.value == self.min_range {
row.get(row.length() - 2)
.unwrap()
.set_grapheme(Self::ARROW_DOWN_DISABLED)
.unwrap();
}
if row.length()
>= len
+ updown + self.value.is_negative() as TSize
+ self.radix.prefix_glyphs().len() as TSize
{
let focus_color = match self.has_focus {
true => self.focus_color,
false => None,
};
let mut start = 0;
if self.value < 0 {
let mut item = row.get(0).unwrap();
item.set_grapheme(Radix::NEGATIVE_INDICATOR).unwrap();
start += 1;
if let Some(color) = focus_color {
item.set_fg(color);
}
}
let end = row.length() - updown;
for g in self.radix.prefix_glyphs() {
let mut item = row.get(start).unwrap();
item.set_grapheme(*g).unwrap();
start += 1;
}
let mut rem = self.value.abs();
for idx in (start..end).rev() {
let mut item = row.get(idx).unwrap();
item.set_grapheme(self.radix.first_literal(rem as usize))
.unwrap();
rem /= self.radix as i32;
}
}
else {
let mut item = row.get(row.length() - 3).unwrap();
item.set_grapheme(Self::NUMERIC_PLACEHOLDER).unwrap();
}
if let Some(color) = self.focus_color
&& self.has_focus
{
row.fill_foreground(color);
}
else if let Some(color) = self.base.colors.base_fg {
row.fill_foreground(color);
}
if let Some(color) = self.base.colors.disabled
&& !self.base.enabled
{
row.fill_foreground(color);
}
if let Some(color) = self.base.colors.base_bg {
row.fill_background(color);
}
}
fn handle_event(&mut self, event: &mut WindowEvent) {
match event.raw() {
Event::FocusGained => self.has_focus = true,
Event::FocusLost => self.has_focus = false,
_ => (self.key_handler)(self, event),
}
}
fn is_enabled(&self) -> bool {
self.base.enabled
}
}
impl WindowLayout for Numeric {
fn desired_size(&self, available_size: TPoint) -> TPoint {
self.base.desired_size(available_size)
}
fn border(&self) -> BorderStyle {
self.base.border
}
fn alignment(&self) -> (HorizontalAlignment, VerticalAlignment) {
self.base.alignment
}
fn is_visible(&self) -> bool {
self.base.visibility
}
fn margin(&self) -> Thickness {
self.base.margin
}
}
impl HasWindowUID for Numeric {
fn uid(&self) -> WindowUID {
self.base.uid
}
}
impl Widget for Numeric {
fn set_visibility(&mut self, visibility: bool) {
self.base.visibility = visibility;
self.provoke_changed_property(WindowProperty::IsVisible);
}
fn set_width(&mut self, _: Size) {}
fn set_height(&mut self, _: Size) {}
fn set_margin(&mut self, margin: Thickness) {
self.base.margin = margin;
self.provoke_changed_property(WindowProperty::Margin);
}
fn set_border(&mut self, border: BorderStyle) {
self.base.border = border;
self.provoke_changed_property(WindowProperty::Border);
}
fn set_alignment(&mut self, horizontal: HorizontalAlignment, vertical: VerticalAlignment) {
self.base.alignment = (horizontal, vertical);
self.provoke_changed_property(WindowProperty::Alignment);
}
fn set_enabled_state(&mut self, is_enabled: bool) {
self.base.enabled = is_enabled;
}
fn set_width_constraint(&mut self, _: SizeConstraint) {}
fn set_height_constraint(&mut self, _: SizeConstraint) {}
}
impl WidgetColors for Numeric {
fn set_disabled_color(&mut self, color: Option<Color>) {
self.base.colors.disabled = color;
}
fn set_base_fg_color(&mut self, color: Option<Color>) {
self.base.colors.base_fg = color;
}
fn set_base_bg_color(&mut self, color: Option<Color>) {
self.base.colors.base_bg = color;
}
}