xlui 0.2.2

Rust GUI库
Documentation 
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pub mod bar;

use crate::frame::context::UpdateType;
use crate::layout::{Layout, LayoutKind};
use crate::render::rectangle::param::RectParam;
use crate::render::{RenderParam, WrcRender};
use crate::response::Response;
use crate::size::border::Border;
use crate::size::padding::Padding;
use crate::size::pos::Pos;
use crate::size::radius::Radius;
use crate::size::rect::Rect;
use crate::style::color::Color;
use crate::style::ClickStyle;
use crate::ui::Ui;
use crate::widgets::scroll::bar::ScrollBar;
use crate::widgets::{Widget, WidgetChange, WidgetSize};
use crate::{Offset, VerticalLayout};

pub struct ScrollWidget {
    pub(crate) id: String,
    context_rect: Rect,
    pub(crate) layout: Option<LayoutKind>,
    v_bar: ScrollBar,
    h_bar: ScrollBar,
    fill_render: RenderParam<RectParam>,
    a: f32,
    padding: Padding,
    horiz_scrollable: bool,
    vert_scrollable: bool,
    width: f32,
    height: f32,
}

impl ScrollWidget {
    fn new() -> ScrollWidget {
        let mut fill_style = ClickStyle::new();
        fill_style.border.inactive = Border::new(1.0).color(Color::rgba(144, 209, 255, 255)).radius(Radius::same(2));
        fill_style.border.hovered = Border::new(1.0).color(Color::rgba(144, 209, 255, 255)).radius(Radius::same(2));
        fill_style.border.clicked = Border::new(1.0).color(Color::rgba(144, 209, 255, 255)).radius(Radius::same(2));
        ScrollWidget {
            id: crate::gen_unique_id(),
            context_rect: Rect::new(),
            layout: None,
            v_bar: ScrollBar::vertical(),
            h_bar: ScrollBar::horizontal(),
            fill_render: RenderParam::new(RectParam::new(Rect::new(), fill_style)),
            a: 0.0,
            padding: Padding::same(5.0),
            horiz_scrollable: false,
            vert_scrollable: false,
            width: 400.0,
            height: 300.0,
        }
    }

    pub fn vertical() -> ScrollWidget {
        ScrollWidget::new().enable_vscroll()
    }

    pub fn horizontal() -> ScrollWidget {
        ScrollWidget::new().enable_hscroll()
    }

    pub fn enable_vscroll(mut self) -> Self {
        self.vert_scrollable = true;
        self
    }

    pub fn enable_hscroll(mut self) -> Self {
        self.horiz_scrollable = true;
        self
    }

    pub fn with_layout(mut self, layout: impl Layout + 'static) -> Self {
        self.set_layout(LayoutKind::new(layout));
        self
    }

    pub fn set_layout(&mut self, layout: LayoutKind) {
        self.layout = Some(layout);
    }

    pub fn set_size(&mut self, w: f32, h: f32) {
        self.set_with(w);
        self.set_height(h);
    }

    pub fn with_size(mut self, width: f32, height: f32) -> Self {
        self.set_size(width, height);
        self
    }

    pub fn with_width(mut self, w: f32) -> Self {
        self.set_with(w);
        self
    }

    pub fn set_with(&mut self, w: f32) {
        self.width = w;
    }

    pub fn with_height(mut self, h: f32) -> Self {
        self.set_height(h);
        self
    }

    pub fn set_height(&mut self, h: f32) {
        self.height = h;
    }


    pub fn padding(mut self, padding: Padding) -> Self {
        self.padding = padding;
        self
    }

    pub fn set_style(&mut self, style: ClickStyle) {
        self.fill_render.param.style = style;
    }

    pub(crate) fn draw(&mut self, ui: &mut Ui, mut callback: impl FnMut(&mut Ui)) {
        // self.context_rect = self.fill_render.param.rect.clone();
        // let cw = self.fill_render.param.rect.width() - self.v_bar.width() - self.padding.horizontal();
        // let ch = self.fill_render.param.rect.height() - self.h_bar.height() - self.padding.vertical();
        // let current_layout = VerticalLayout::top_to_bottom().with_size(cw, ch);

        // let mut current_layout = VerticalLayout::top_to_bottom().max_rect(self.context_rect.clone(), self.padding.clone());
        // current_layout.size_mode = SizeMode::Fix;
        let mut current_layout = self.layout.take().unwrap_or_else(|| LayoutKind::new(VerticalLayout::top_to_bottom()));
        let lw = self.width - self.padding.horizontal() - self.v_bar.width();
        let lh = self.height - self.padding.vertical() - self.h_bar.height();
        current_layout.set_size(lw, lh);
        // layout.set_width();
        // layout.set_height();
        let previous_layout = ui.layout.replace(current_layout).unwrap();
        //视图内容
        callback(ui);
        let mut current_layout = ui.layout.replace(previous_layout).unwrap();
        let resp = current_layout.update(ui);
        self.fill_render.param.rect.set_size(self.width, self.height);
        self.v_bar.set_height(self.height - self.h_bar.height() - self.padding.vertical());
        self.v_bar.set_context_height(resp.size.rh);
        self.h_bar.set_width(self.width - self.v_bar.width() - self.padding.horizontal());
        self.h_bar.set_context_width(resp.size.rw);
        self.layout = Some(current_layout);
    }

    fn re_init(&mut self, ui: &mut Ui) {
        //滚动区域
        self.fill_render.init_rectangle(ui, false, false);
        self.v_bar.update(ui);
        self.h_bar.update(ui);
    }

    pub fn show(mut self, ui: &mut Ui, callback: impl FnMut(&mut Ui)) {
        self.draw(ui, callback);
        ui.add(self);
    }

    pub fn reset_context_height(&mut self, h: f32) {
        self.v_bar.set_context_height(h);
        self.bar_offset(0.0, 0.0);
        // let layout: &mut VerticalLayout = self.layout.as_mut().unwrap().as_mut_().unwrap();
        // self.v_bar.set_context_height(layout.height() + layout.item_space());
    }

    fn bar_offset(&mut self, ox: f32, oy: f32) {
        let roy = self.v_bar.set_vbar_value_by_offset(-oy);
        let rox = self.h_bar.set_hbar_value_by_offset(-ox);
        let offset = Offset::new(Pos::new())
            .with_x(if self.horiz_scrollable { rox } else { 0.0 })
            .with_y(if self.vert_scrollable { roy } else { 0.0 });
        self.layout.as_mut().unwrap().set_offset(offset);
    }

    pub(crate) fn redraw(&mut self, ui: &mut Ui) {
        // println!("{:?}-{:?}-{}", ui.update_type, ui.draw_rect, ui.widget_changed as u32);
        if self.a != 0.0 {
            let oy = self.a * 10.0 * 10.0;
            let mut pos = Pos::new();
            pos.x = self.fill_render.param.rect.dx().center();
            pos.y = self.fill_render.param.rect.dy().center();
            // ui.update_type = UpdateType::Offset(Offset::new(pos).with_y(-oy));
            if self.a.abs() - 0.001 < 0.0 {
                self.a = 0.0;
            } else if self.a > 0.0 {
                self.a -= 0.001;
            } else if self.a < 0.0 {
                self.a += 0.001;
            }
            self.bar_offset(0.0, oy);
            // self.v_bar.update(ui);
            // if !self.v_bar.scrolling() { self.a = 0.0; }
            ui.context.window.request_redraw();
        }
        if ui.widget_changed.contains(WidgetChange::Position) {
            self.fill_render.param.rect.offset_to_rect(&ui.draw_rect);
            self.fill_render.update(ui, false, false);
        }

        let pass = ui.pass.as_mut().unwrap();

        //背景
        ui.context.render.rectangle.render(&self.fill_render, pass);
        let clip = self.fill_render.param.rect.clone_add_padding(&self.padding);
        // println!("{:?}", clip);
        pass.set_scissor_rect(clip.dx().min as u32, clip.dy().min as u32, clip.width() as u32, clip.height() as u32);
        let resp = if ui.widget_changed.contains(WidgetChange::Position) {
            self.context_rect = ui.draw_rect.clone();
            self.context_rect.set_width(self.fill_render.param.rect.width() - self.padding.horizontal() - self.v_bar.width());
            self.context_rect.set_height(self.fill_render.param.rect.height() - self.padding.vertical() - self.h_bar.height());
            self.context_rect.add_min_x(self.padding.left);
            self.context_rect.add_min_y(self.padding.top);
            // self.context_rect.add_min_x(self.padding.left);
            // self.context_rect.add_max_x(-self.v_bar.width() - self.padding.right);
            // self.context_rect.add_min_y(self.padding.left);
            // self.context_rect.add_max_y(-self.h_bar.height() - self.padding.bottom);
            let previous_rect = ui.draw_rect.clone();
            ui.draw_rect = self.context_rect.clone();
            let resp = self.layout.as_mut().unwrap().update(ui);
            ui.draw_rect = previous_rect;
            resp
        } else {
            self.layout.as_mut().unwrap().update(ui)
        };
        let pass = ui.pass.as_mut().unwrap();
        pass.set_scissor_rect(0, 0, ui.device.surface_config.width, ui.device.surface_config.height);
        // let resp = self.layout.as_mut().unwrap().update(ui);

        if self.vert_scrollable {
            //垂直滚动条
            if ui.widget_changed.contains(WidgetChange::Position) {
                let previous_rect = ui.draw_rect.clone();
                let mut v_bar_rect = previous_rect.clone();
                v_bar_rect.add_min_x(resp.size.dw + self.padding.left);
                v_bar_rect.add_max_x(-self.padding.right);
                v_bar_rect.add_min_y(self.padding.top);
                v_bar_rect.add_max_y(-self.padding.bottom);
                ui.draw_rect = v_bar_rect;
                self.v_bar.redraw(ui);
                ui.draw_rect = previous_rect;
            } else {
                self.v_bar.redraw(ui);
            }
        }

        if self.horiz_scrollable {
            //水平滚动条
            if ui.widget_changed.contains(WidgetChange::Position) {
                let previous_rect = ui.draw_rect.clone();
                let mut h_bar_rect = previous_rect.clone();
                h_bar_rect.add_min_y(resp.size.dh + self.padding.top);
                h_bar_rect.add_max_y(-self.padding.bottom);
                h_bar_rect.add_min_x(self.padding.left);
                h_bar_rect.add_max_x(-self.padding.right);
                ui.draw_rect = h_bar_rect;
                self.h_bar.redraw(ui);
                ui.draw_rect = previous_rect;
            } else {
                self.h_bar.redraw(ui);
            }
        }

        // let pass = ui.pass.as_mut().unwrap();
        //视图内容

        // self.layout.as_mut().unwrap().redraw(ui);

    }
}

impl Widget for ScrollWidget {
    fn update(&mut self, ui: &mut Ui) -> Response<'_> {
        match ui.update_type {
            UpdateType::Draw => self.redraw(ui),
            UpdateType::Init => self.re_init(ui),
            UpdateType::ReInit => {
                self.re_init(ui);
                self.layout.as_mut().unwrap().update(ui);
            }
            UpdateType::MouseMove => {
                if ui.device.device_input.pressed_at(&self.context_rect) {
                    let oy = ui.device.device_input.mouse.offset_y();
                    let ox = ui.device.device_input.mouse.offset_x();
                    self.bar_offset(ox, oy);

                    // let layout: &mut VerticalLayout = self.layout.as_mut().unwrap().as_mut_().unwrap();
                    // layout.set_offset(offset);
                    ui.context.window.request_redraw();
                    // ui.update_type = UpdateType::Offset(Offset::new(ui.device.device_input.mouse.pressed_pos).with_y(-oy));
                    // ui.current_rect = self.fill_render.param.rect.clone();
                    // self.v_bar.update(ui);
                    return Response::new(&self.id, WidgetSize::same(self.fill_render.param.rect.width(), self.fill_render.param.rect.height()));
                }
                let mut offset = Offset::new(Pos::new());
                if self.vert_scrollable {
                    self.v_bar.update(ui);
                    offset.y = self.v_bar.offset();
                }
                if self.horiz_scrollable {
                    self.h_bar.update(ui);
                    offset.x = self.h_bar.offset();
                }
                self.layout.as_mut().unwrap().set_offset(offset);
                self.layout.as_mut().unwrap().update(ui);
            }
            UpdateType::MousePress => {
                self.layout.as_mut().unwrap().update(ui);
                if self.vert_scrollable { self.v_bar.update(ui); }
                if self.horiz_scrollable { self.h_bar.update(ui); }
            }
            UpdateType::MouseRelease => {
                if ui.device.device_input.hovered_at(&self.fill_render.param.rect) {
                    self.a = ui.device.device_input.mouse.a;
                }
                self.layout.as_mut().unwrap().update(ui);
            }
            UpdateType::MouseWheel => {
                if ui.device.device_input.hovered_at(&self.fill_render.param.rect) {
                    let oy = ui.device.device_input.mouse.delta_y() * 10.0;
                    self.bar_offset(0.0, oy);
                    // let roy = self.v_bar.set_vbar_value_by_offset(-oy);
                    // let rox = self.h_bar.offset();
                    // let offset = Offset::new(Pos::new())
                    //     .with_x(if self.horiz_scrollable { rox } else { 0.0 })
                    //     .with_y(if self.vert_scrollable { roy } else { 0.0 });
                    // self.layout.as_mut().unwrap().set_offset(offset);
                    // ui.update_type = UpdateType::Offset(Offset::new(ui.device.device_input.mouse.lastest).with_y());
                    // self.v_bar.update(ui);
                    // return Response::new(&self.id, WidgetSize::same(self.fill_render.param.rect.width(), self.fill_render.param.rect.height()));
                    ui.context.window.request_redraw();
                }
            }
            // UpdateType::Offset(ref mut o) => {
            //     if !self.fill_render.param.rect.has_position(o.pos) { return; }
            //     ui.can_offset = true;
            //     o.target_id = self.layout.as_ref().unwrap().id.to_string();
            //     self.layout.as_mut().unwrap().update(ui);
            //     ui.update_type = UpdateType::None;
            //     ui.can_offset = false;
            // }
            _ => {}
        }
        // ui.current_rect = self.context_rect.clone();
        // self.v_bar.update(ui);
        // if let Some(o) = ui.update_type.is_offset() {
        //     if o.y == 0.0 { self.a = 0.0; }
        //     ui.update_type = UpdateType::None;
        // }
        Response::new(&self.id, WidgetSize::same(self.fill_render.param.rect.width(), self.fill_render.param.rect.height()))
    }
}