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128 lines
4.4 KiB
128 lines
4.4 KiB
use crate::{
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strutil::TString,
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ui::{
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component::{text::TextStyle, Component, Event, EventCtx, Never},
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geometry::{Alignment, Offset, Rect},
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model_mercury::theme,
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shape::{Renderer, Text},
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},
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};
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/// Component showing a task instruction (e.g. "Swipe up") and optionally task
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/// description (e.g. "Confirm transaction") to a user. A host of this component
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/// is responsible of providing the exact area considering also the spacing. The
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/// height must be 18px (only instruction) or 37px (both description and
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/// instruction). The content and style of both description and instruction is
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/// configurable separatedly.
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pub struct Footer<'a> {
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area: Rect,
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text_instruction: TString<'a>,
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text_description: Option<TString<'a>>,
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style_instruction: &'static TextStyle,
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style_description: &'static TextStyle,
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}
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impl<'a> Footer<'a> {
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/// height of the component with only instruction [px]
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pub const HEIGHT_SIMPLE: i16 = 18;
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/// height of the component with both description and instruction [px]
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pub const HEIGHT_DEFAULT: i16 = 37;
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pub fn new<T: Into<TString<'a>>>(instruction: T) -> Self {
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Self {
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area: Rect::zero(),
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text_instruction: instruction.into(),
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text_description: None,
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style_instruction: &theme::TEXT_SUB,
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style_description: &theme::TEXT_SUB,
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}
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}
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pub fn with_description<T: Into<TString<'a>>>(self, description: T) -> Self {
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Self {
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text_description: Some(description.into()),
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..self
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}
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}
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pub fn update_instruction<T: Into<TString<'a>>>(&mut self, ctx: &mut EventCtx, s: T) {
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self.text_instruction = s.into();
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ctx.request_paint();
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}
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pub fn update_description<T: Into<TString<'a>>>(&mut self, ctx: &mut EventCtx, s: T) {
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self.text_description = Some(s.into());
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ctx.request_paint();
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}
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pub fn update_instruction_style(&mut self, ctx: &mut EventCtx, style: &'static TextStyle) {
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self.style_instruction = style;
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ctx.request_paint();
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}
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pub fn update_description_style(&mut self, ctx: &mut EventCtx, style: &'static TextStyle) {
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self.style_description = style;
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ctx.request_paint();
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}
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}
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impl<'a> Component for Footer<'a> {
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type Msg = Never;
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fn place(&mut self, bounds: Rect) -> Rect {
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let h = bounds.height();
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assert!(h == Footer::HEIGHT_SIMPLE || h == Footer::HEIGHT_DEFAULT);
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self.area = bounds;
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bounds
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}
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fn event(&mut self, _ctx: &mut EventCtx, _event: Event) -> Option<Self::Msg> {
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None
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}
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fn paint(&mut self) {
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// TODO: remove when ui-t3t1 done
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todo!()
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}
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fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
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// show description only if there is space for it
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if self.area.height() == Footer::HEIGHT_DEFAULT {
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if let Some(description) = self.text_description {
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let area_description = self.area.split_top(Footer::HEIGHT_SIMPLE).0;
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let text_description_font_descent = self
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.style_description
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.text_font
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.visible_text_height_ex("Ay")
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.1;
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let text_description_baseline =
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area_description.bottom_center() - Offset::y(text_description_font_descent);
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description.map(|t| {
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Text::new(text_description_baseline, t)
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.with_font(self.style_description.text_font)
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.with_fg(self.style_description.text_color)
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.with_align(Alignment::Center)
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.render(target);
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});
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}
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}
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let area_instruction = self.area.split_bottom(Footer::HEIGHT_SIMPLE).1;
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let text_instruction_font_descent = self
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.style_instruction
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.text_font
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.visible_text_height_ex("Ay")
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.1;
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let text_instruction_baseline =
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area_instruction.bottom_center() - Offset::y(text_instruction_font_descent);
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self.text_instruction.map(|t| {
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Text::new(text_instruction_baseline, t)
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.with_font(self.style_instruction.text_font)
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.with_fg(self.style_instruction.text_color)
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.with_align(Alignment::Center)
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.render(target);
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});
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}
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}
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