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use num::Float;
use text;
use utils::{map_range, val_to_string};
use widget;
use {Borderable, Color, Colorable, FontSize, Labelable, Positionable, Scalar, Widget};
#[derive(WidgetCommon_)]
pub struct XYPad<'a, X, Y> {
#[conrod(common_builder)]
common: widget::CommonBuilder,
x: X,
min_x: X,
max_x: X,
y: Y,
min_y: Y,
max_y: Y,
maybe_label: Option<&'a str>,
style: Style,
pub enabled: bool,
}
#[derive(Copy, Clone, Debug, Default, PartialEq, WidgetStyle_)]
pub struct Style {
#[conrod(default = "theme.shape_color")]
pub color: Option<Color>,
#[conrod(default = "theme.border_width")]
pub border: Option<Scalar>,
#[conrod(default = "theme.border_color")]
pub border_color: Option<Color>,
#[conrod(default = "theme.label_color")]
pub label_color: Option<Color>,
#[conrod(default = "theme.font_size_medium")]
pub label_font_size: Option<FontSize>,
#[conrod(default = "theme.font_id")]
pub label_font_id: Option<Option<text::font::Id>>,
#[conrod(default = "14")]
pub value_font_size: Option<FontSize>,
#[conrod(default = "2.0")]
pub line_thickness: Option<Scalar>,
}
widget_ids! {
struct Ids {
rectangle,
label,
h_line,
v_line,
value_label,
}
}
pub struct State {
ids: Ids,
}
impl<'a, X, Y> XYPad<'a, X, Y> {
pub fn new(x_val: X, min_x: X, max_x: X, y_val: Y, min_y: Y, max_y: Y) -> Self {
XYPad {
common: widget::CommonBuilder::default(),
style: Style::default(),
x: x_val,
min_x: min_x,
max_x: max_x,
y: y_val,
min_y: min_y,
max_y: max_y,
maybe_label: None,
enabled: true,
}
}
pub fn label_font_id(mut self, font_id: text::font::Id) -> Self {
self.style.label_font_id = Some(Some(font_id));
self
}
builder_methods! {
pub line_thickness { style.line_thickness = Some(Scalar) }
pub value_font_size { style.value_font_size = Some(FontSize) }
pub enabled { enabled = bool }
}
}
impl<'a, X, Y> Widget for XYPad<'a, X, Y>
where
X: Float + ToString + ::std::fmt::Debug + ::std::any::Any,
Y: Float + ToString + ::std::fmt::Debug + ::std::any::Any,
{
type State = State;
type Style = Style;
type Event = Option<(X, Y)>;
fn init_state(&self, id_gen: widget::id::Generator) -> Self::State {
State {
ids: Ids::new(id_gen),
}
}
fn style(&self) -> Self::Style {
self.style.clone()
}
fn update(self, args: widget::UpdateArgs<Self>) -> Self::Event {
use position::{Direction, Edge};
let widget::UpdateArgs {
id,
state,
rect,
style,
ui,
..
} = args;
let XYPad {
x,
min_x,
max_x,
y,
min_y,
max_y,
maybe_label,
..
} = self;
let border = style.border(ui.theme());
let inner_rect = rect.pad(border);
let mut new_x = x;
let mut new_y = y;
if let Some(mouse) = ui.widget_input(id).mouse() {
if mouse.buttons.left().is_down() {
let mouse_abs_xy = mouse.abs_xy();
let clamped_x = inner_rect.x.clamp_value(mouse_abs_xy[0]);
let clamped_y = inner_rect.y.clamp_value(mouse_abs_xy[1]);
let (l, r, b, t) = inner_rect.l_r_b_t();
new_x = map_range(clamped_x, l, r, min_x, max_x);
new_y = map_range(clamped_y, b, t, min_y, max_y);
}
}
let event = if x != new_x || y != new_y {
Some((new_x, new_y))
} else {
None
};
let interaction_color = |ui: &::ui::UiCell, color: Color| {
ui.widget_input(id)
.mouse()
.map(|mouse| {
if mouse.buttons.left().is_down() {
color.clicked()
} else {
color.highlighted()
}
})
.unwrap_or(color)
};
let dim = rect.dim();
let color = interaction_color(&ui, style.color(ui.theme()));
let border = style.border(ui.theme());
let border_color = style.border_color(ui.theme());
widget::BorderedRectangle::new(dim)
.middle_of(id)
.graphics_for(id)
.color(color)
.border(border)
.border_color(border_color)
.set(state.ids.rectangle, ui);
let label_color = style.label_color(ui.theme());
let font_id = style.label_font_id(&ui.theme).or(ui.fonts.ids().next());
if let Some(label) = maybe_label {
let label_font_size = style.label_font_size(ui.theme());
widget::Text::new(label)
.and_then(font_id, widget::Text::font_id)
.middle_of(state.ids.rectangle)
.graphics_for(id)
.color(label_color)
.font_size(label_font_size)
.set(state.ids.label, ui);
}
let (w, h) = inner_rect.w_h();
let half_w = w / 2.0;
let half_h = h / 2.0;
let v_line_x = map_range(new_x, min_x, max_x, -half_w, half_w);
let h_line_y = map_range(new_y, min_y, max_y, -half_h, half_h);
let thickness = style.line_thickness(ui.theme());
let line_color = label_color.with_alpha(1.0);
let v_line_start = [0.0, -half_h];
let v_line_end = [0.0, half_h];
widget::Line::centred(v_line_start, v_line_end)
.color(line_color)
.thickness(thickness)
.x_y_relative_to(id, v_line_x, 0.0)
.graphics_for(id)
.parent(id)
.set(state.ids.v_line, ui);
let h_line_start = [-half_w, 0.0];
let h_line_end = [half_w, 0.0];
widget::Line::centred(h_line_start, h_line_end)
.color(line_color)
.thickness(thickness)
.x_y_relative_to(id, 0.0, h_line_y)
.graphics_for(id)
.parent(id)
.set(state.ids.h_line, ui);
let x_string = val_to_string(new_x, max_x, max_x - min_x, rect.w() as usize);
let y_string = val_to_string(new_y, max_y, max_y - min_y, rect.h() as usize);
let value_string = format!("{}, {}", x_string, y_string);
let cross_hair_xy = [inner_rect.x() + v_line_x, inner_rect.y() + h_line_y];
const VALUE_TEXT_PAD: f64 = 5.0;
let x_direction = match inner_rect.x.closest_edge(cross_hair_xy[0]) {
Edge::End => Direction::Backwards,
Edge::Start => Direction::Forwards,
};
let y_direction = match inner_rect.y.closest_edge(cross_hair_xy[1]) {
Edge::End => Direction::Backwards,
Edge::Start => Direction::Forwards,
};
let value_font_size = style.value_font_size(ui.theme());
widget::Text::new(&value_string)
.and_then(font_id, widget::Text::font_id)
.x_direction_from(state.ids.v_line, x_direction, VALUE_TEXT_PAD)
.y_direction_from(state.ids.h_line, y_direction, VALUE_TEXT_PAD)
.color(line_color)
.graphics_for(id)
.parent(id)
.font_size(value_font_size)
.set(state.ids.value_label, ui);
event
}
}
impl<'a, X, Y> Colorable for XYPad<'a, X, Y> {
builder_method!(color { style.color = Some(Color) });
}
impl<'a, X, Y> Borderable for XYPad<'a, X, Y> {
builder_methods! {
border { style.border = Some(Scalar) }
border_color { style.border_color = Some(Color) }
}
}
impl<'a, X, Y> Labelable<'a> for XYPad<'a, X, Y> {
builder_methods! {
label { maybe_label = Some(&'a str) }
label_color { style.label_color = Some(Color) }
label_font_size { style.label_font_size = Some(FontSize) }
}
}