130 lines
3.2 KiB
Rust
130 lines
3.2 KiB
Rust
use std::sync::Arc;
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use crate::{widgets::*, *};
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// ----------------------------------------------------------------------------
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// TODO: rename GuiResponse
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pub struct GuiResponse {
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/// The mouse is hovering above this
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pub hovered: bool,
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/// The mouse went got pressed on this thing this frame
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pub clicked: bool,
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/// The mouse is interacting with this thing (e.g. dragging it)
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pub active: bool,
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/// The region of the screen we are talking about
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pub rect: Rect,
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/// Used for showing a popup (if any)
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pub ctx: Arc<Context>,
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}
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impl GuiResponse {
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/// Show some stuff if the item was hovered
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pub fn tooltip<F>(&mut self, add_contents: F) -> &mut Self
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where
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F: FnOnce(&mut Region),
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{
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if self.hovered {
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if let Some(mouse_pos) = self.ctx.input().mouse_pos {
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let window_pos = mouse_pos + vec2(16.0, 16.0);
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show_popup(&self.ctx, window_pos, add_contents);
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}
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}
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self
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}
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/// Show this text if the item was hovered
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pub fn tooltip_text<S: Into<String>>(&mut self, text: S) -> &mut Self {
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self.tooltip(|popup| {
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popup.add(Label::new(text));
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})
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}
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}
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// ----------------------------------------------------------------------------
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub enum Direction {
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Horizontal,
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Vertical,
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}
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impl Default for Direction {
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fn default() -> Direction {
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Direction::Vertical
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}
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub enum Align {
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/// Left/Top
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Min,
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/// Note: requires a bounded/known available_width.
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Center,
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/// Right/Bottom
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/// Note: requires a bounded/known available_width.
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Max,
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}
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impl Default for Align {
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fn default() -> Align {
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Align::Min
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}
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}
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// ----------------------------------------------------------------------------
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/// Show a pop-over window
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pub fn show_popup<F>(ctx: &Arc<Context>, window_pos: Vec2, add_contents: F)
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where
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F: FnOnce(&mut Region),
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{
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let layer = Layer::Popup;
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let where_to_put_background = ctx.graphics.lock().layer(layer).len();
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let style = ctx.style();
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let window_padding = style.window_padding;
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let mut contents_region = Region {
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ctx: ctx.clone(),
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layer,
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style,
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id: Id::popup(),
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dir: Direction::Vertical,
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align: Align::Min,
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cursor: window_pos + window_padding,
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bounding_size: vec2(0.0, 0.0),
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available_space: vec2(ctx.input.screen_size.x.min(350.0), std::f32::INFINITY), // TODO: popup/tooltip width
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};
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add_contents(&mut contents_region);
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// Now insert popup background:
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// TODO: handle the last item_spacing in a nicer way
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let inner_size = contents_region.bounding_size - style.item_spacing;
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let outer_size = inner_size + 2.0 * window_padding;
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let rect = Rect::from_min_size(window_pos, outer_size);
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let mut graphics = ctx.graphics.lock();
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graphics.layer(layer).insert(
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where_to_put_background,
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PaintCmd::Rect {
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corner_radius: 5.0,
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fill_color: Some(style.background_fill_color()),
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outline: Some(Outline {
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color: color::WHITE,
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width: 1.0,
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}),
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rect,
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},
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);
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}
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