djkato/egui
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Move Memory and Region to own files

Browse source
This commit is contained in:
Emil Ernerfeldt 2020-04-17 15:29:48 +02:00
parent 1d3836ba80
commit de76cb6190
6 changed files with 504 additions and 521 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
emigui/src/emigui.rs
View file

@ -1,13 +1,6 @@
use std::sync::Arc; use std::sync::Arc;
use crate::{ use crate::{layout, mesher::Mesher, widgets::*, *};
label, layout,
layout::Region,
mesher::Mesher,
types::{GuiInput, PaintCmd},
widgets::*,
FontDefinitions, Fonts, Layer, Mesh, RawInput, Texture,
};
#[derive(Clone, Copy, Default)] #[derive(Clone, Copy, Default)]
struct Stats { struct Stats {

509
emigui/src/layout.rs
View file

@ -1,20 +1,9 @@
use std::{ use std::{
collections::{HashMap, HashSet},
hash::Hash, hash::Hash,
sync::{Arc, Mutex}, sync::{Arc, Mutex},
}; };
use crate::{ use crate::{widgets::*, *};
color::{self, Color},
font::TextFragment,
fonts::{Fonts, TextStyle},
math::*,
style::Style,
types::*,
widgets::{Label, Widget},
window::WindowState,
GraphicLayers, Layer,
};
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------
@ -33,7 +22,7 @@ pub struct GuiResponse {
pub rect: Rect, pub rect: Rect,
/// Used for showing a popup (if any) /// Used for showing a popup (if any)
data: Arc<Data>, pub data: Arc<Data>,
} }
impl GuiResponse { impl GuiResponse {
@ -61,55 +50,6 @@ impl GuiResponse {
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------
#[derive(Clone, Debug, Default)]
pub struct Memory {
/// The widget being interacted with (e.g. dragged, in case of a slider).
active_id: Option<Id>,
/// Which foldable regions are open.
open_foldables: HashSet<Id>,
windows: HashMap<Id, WindowState>,
/// Top is last
window_order: Vec<Id>,
}
impl Memory {
/// default_rect: where to put it if it does NOT exist
pub fn get_or_create_window(&mut self, id: Id, default_rect: Rect) -> WindowState {
if let Some(state) = self.windows.get(&id) {
*state
} else {
let state = WindowState { rect: default_rect };
self.windows.insert(id, state);
self.window_order.push(id);
state
}
}
pub fn set_window_state(&mut self, id: Id, state: WindowState) {
self.windows.insert(id, state);
}
pub fn layer_at(&self, pos: Vec2) -> Layer {
for window_id in self.window_order.iter().rev() {
if let Some(state) = self.windows.get(window_id) {
if state.rect.contains(pos) {
return Layer::Window(*window_id);
}
}
}
Layer::Background
}
pub fn move_window_to_top(&mut self, _id: Id) {
// TODO
}
}
// ----------------------------------------------------------------------------
#[derive(Clone, Copy, Debug, PartialEq)] #[derive(Clone, Copy, Debug, PartialEq)]
pub enum Direction { pub enum Direction {
Horizontal, Horizontal,
@ -217,8 +157,6 @@ impl Data {
pub fn interact(&self, layer: Layer, rect: Rect, interaction_id: Option<Id>) -> InteractInfo { pub fn interact(&self, layer: Layer, rect: Rect, interaction_id: Option<Id>) -> InteractInfo {
let mut memory = self.memory.lock().unwrap(); let mut memory = self.memory.lock().unwrap();
// TODO: check for windows on top of the current rect!
let hovered = if let Some(mouse_pos) = self.input.mouse_pos { let hovered = if let Some(mouse_pos) = self.input.mouse_pos {
if rect.contains(mouse_pos) { if rect.contains(mouse_pos) {
let is_something_else_active = let is_something_else_active =
@ -307,446 +245,3 @@ where
}, },
); );
} }
// ----------------------------------------------------------------------------
/// Represents a region of the screen
/// with a type of layout (horizontal or vertical).
/// TODO: make Region a trait so we can have type-safe HorizontalRegion etc?
pub struct Region {
pub(crate) data: Arc<Data>,
/// Where to put the graphics output of this Region
pub(crate) layer: Layer,
pub(crate) style: Style,
/// Unique ID of this region.
pub(crate) id: Id,
/// Doesn't change.
pub(crate) dir: Direction,
pub(crate) align: Align,
/// Where the next widget will be put.
/// Progresses along self.dir
pub(crate) cursor: Vec2,
/// Bounding box of children.
/// We keep track of our max-size along the orthogonal to self.dir
pub(crate) bounding_size: Vec2,
/// This how much more space we can take up without overflowing our parent.
/// Shrinks as cursor increments.
pub(crate) available_space: Vec2,
}
impl Region {
/// It is up to the caller to make sure there is room for this.
/// Can be used for free painting.
/// NOTE: all coordinates are screen coordinates!
pub fn add_paint_cmd(&mut self, paint_cmd: PaintCmd) {
self.data
.graphics
.lock()
.unwrap()
.layer(self.layer)
.push(paint_cmd)
}
pub fn add_paint_cmds(&mut self, mut cmds: Vec<PaintCmd>) {
self.data
.graphics
.lock()
.unwrap()
.layer(self.layer)
.append(&mut cmds)
}
/// Options for this region, and any child regions we may spawn.
pub fn style(&self) -> &Style {
&self.style
}
pub fn data(&self) -> &Arc<Data> {
&self.data
}
pub fn input(&self) -> &GuiInput {
self.data.input()
}
pub fn fonts(&self) -> &Fonts {
&*self.data.fonts
}
pub fn width(&self) -> f32 {
self.available_space.x
}
pub fn height(&self) -> f32 {
self.available_space.y
}
pub fn size(&self) -> Vec2 {
self.available_space
}
pub fn direction(&self) -> Direction {
self.dir
}
pub fn cursor(&self) -> Vec2 {
self.cursor
}
pub fn set_align(&mut self, align: Align) {
self.align = align;
}
// ------------------------------------------------------------------------
// Sub-regions:
pub fn foldable<S, F>(&mut self, text: S, add_contents: F) -> GuiResponse
where
S: Into<String>,
F: FnOnce(&mut Region),
{
assert!(
self.dir == Direction::Vertical,
"Horizontal foldable is unimplemented"
);
let text: String = text.into();
let id = self.make_child_id(&text);
let text_style = TextStyle::Button;
let font = &self.fonts()[text_style];
let (text, text_size) = font.layout_multiline(&text, self.width());
let text_cursor = self.cursor + self.style.button_padding;
let interact = self.reserve_space(
vec2(
self.available_space.x,
text_size.y + 2.0 * self.style.button_padding.y,
),
Some(id),
);
let open = {
let mut memory = self.data.memory.lock().unwrap();
if interact.clicked {
if memory.open_foldables.contains(&id) {
memory.open_foldables.remove(&id);
} else {
memory.open_foldables.insert(id);
}
}
memory.open_foldables.contains(&id)
};
let fill_color = self.style.interact_fill_color(&interact);
let stroke_color = self.style.interact_stroke_color(&interact);
self.add_paint_cmd(PaintCmd::Rect {
corner_radius: 5.0,
fill_color: Some(fill_color),
outline: Some(Outline {
width: 1.0,
color: color::WHITE,
}),
rect: interact.rect,
});
let (small_icon_rect, _) = self.style.icon_rectangles(&interact.rect);
// Draw a minus:
self.add_paint_cmd(PaintCmd::Line {
points: vec![
vec2(small_icon_rect.min().x, small_icon_rect.center().y),
vec2(small_icon_rect.max().x, small_icon_rect.center().y),
],
color: stroke_color,
width: self.style.line_width,
});
if !open {
// Draw it as a plus:
self.add_paint_cmd(PaintCmd::Line {
points: vec![
vec2(small_icon_rect.center().x, small_icon_rect.min().y),
vec2(small_icon_rect.center().x, small_icon_rect.max().y),
],
color: stroke_color,
width: self.style.line_width,
});
}
self.add_text(
text_cursor + vec2(self.style.start_icon_width, 0.0),
text_style,
text,
None,
);
if open {
let old_id = self.id;
self.id = id;
self.indent(add_contents);
self.id = old_id;
}
self.response(interact)
}
/// Create a child region which is indented to the right
pub fn indent<F>(&mut self, add_contents: F)
where
F: FnOnce(&mut Region),
{
let indent = vec2(self.style.indent, 0.0);
let mut child_region = Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.id,
dir: self.dir,
align: Align::Min,
cursor: self.cursor + indent,
bounding_size: vec2(0.0, 0.0),
available_space: self.available_space - indent,
};
add_contents(&mut child_region);
let size = child_region.bounding_size;
self.reserve_space_without_padding(indent + size);
}
/// Return a sub-region relative to the parent
pub fn relative_region(&mut self, rect: Rect) -> Region {
Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.id,
dir: self.dir,
cursor: self.cursor + rect.min(),
align: self.align,
bounding_size: vec2(0.0, 0.0),
available_space: rect.size(),
}
}
/// A column region with a given width.
pub fn column(&mut self, column_position: Align, width: f32) -> Region {
let x = match column_position {
Align::Min => 0.0,
Align::Center => self.available_space.x / 2.0 - width / 2.0,
Align::Max => self.available_space.x - width,
};
self.relative_region(Rect::from_min_size(
vec2(x, 0.0),
vec2(width, self.available_space.y),
))
}
pub fn left_column(&mut self, width: f32) -> Region {
self.column(Align::Min, width)
}
pub fn centered_column(&mut self, width: f32) -> Region {
self.column(Align::Center, width)
}
pub fn right_column(&mut self, width: f32) -> Region {
self.column(Align::Max, width)
}
pub fn inner_layout<F>(&mut self, dir: Direction, align: Align, add_contents: F)
where
F: FnOnce(&mut Region),
{
let mut child_region = Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.id,
dir,
align,
cursor: self.cursor,
bounding_size: vec2(0.0, 0.0),
available_space: self.available_space,
};
add_contents(&mut child_region);
let size = child_region.bounding_size;
self.reserve_space_without_padding(size);
}
/// Start a region with horizontal layout
pub fn horizontal<F>(&mut self, align: Align, add_contents: F)
where
F: FnOnce(&mut Region),
{
self.inner_layout(Direction::Horizontal, align, add_contents)
}
/// Start a region with vertical layout
pub fn vertical<F>(&mut self, align: Align, add_contents: F)
where
F: FnOnce(&mut Region),
{
self.inner_layout(Direction::Vertical, align, add_contents)
}
/// Temporarily split split a vertical layout into several columns.
///
/// region.columns(2, |columns| {
/// columns[0].add(emigui::widgets::label!("First column"));
/// columns[1].add(emigui::widgets::label!("Second column"));
/// });
pub fn columns<F, R>(&mut self, num_columns: usize, add_contents: F) -> R
where
F: FnOnce(&mut [Region]) -> R,
{
// TODO: ensure there is space
let padding = self.style.item_spacing.x;
let total_padding = padding * (num_columns as f32 - 1.0);
let column_width = (self.available_space.x - total_padding) / (num_columns as f32);
let mut columns: Vec<Region> = (0..num_columns)
.map(|col_idx| Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.make_child_id(&("column", col_idx)),
dir: Direction::Vertical,
align: self.align,
cursor: self.cursor + vec2((col_idx as f32) * (column_width + padding), 0.0),
bounding_size: vec2(0.0, 0.0),
available_space: vec2(column_width, self.available_space.y),
})
.collect();
let result = add_contents(&mut columns[..]);
let mut max_height = 0.0;
for region in columns {
let size = region.bounding_size;
max_height = size.y.max(max_height);
}
self.reserve_space_without_padding(vec2(self.available_space.x, max_height));
result
}
// ------------------------------------------------------------------------
pub fn add<W: Widget>(&mut self, widget: W) -> GuiResponse {
widget.add_to(self)
}
// ------------------------------------------------------------------------
pub fn reserve_space(&mut self, size: Vec2, interaction_id: Option<Id>) -> InteractInfo {
let pos = self.reserve_space_without_padding(size + self.style.item_spacing);
let rect = Rect::from_min_size(pos, size);
self.data.interact(self.layer, rect, interaction_id)
}
/// Reserve this much space and move the cursor.
/// Returns where to put the widget.
pub fn reserve_space_without_padding(&mut self, size: Vec2) -> Vec2 {
let mut pos = self.cursor;
if self.dir == Direction::Horizontal {
pos.y += match self.align {
Align::Min => 0.0,
Align::Center => 0.5 * (self.available_space.y - size.y),
Align::Max => self.available_space.y - size.y,
};
self.cursor.x += size.x;
self.available_space.x -= size.x;
self.bounding_size.x += size.x;
self.bounding_size.y = self.bounding_size.y.max(size.y);
} else {
pos.x += match self.align {
Align::Min => 0.0,
Align::Center => 0.5 * (self.available_space.x - size.x),
Align::Max => self.available_space.x - size.x,
};
self.cursor.y += size.y;
self.available_space.y -= size.x;
self.bounding_size.y += size.y;
self.bounding_size.x = self.bounding_size.x.max(size.x);
}
pos
}
pub fn make_child_id<H: Hash>(&self, child_id: &H) -> Id {
use std::hash::Hasher;
let mut hasher = std::collections::hash_map::DefaultHasher::new();
hasher.write_u64(self.id);
child_id.hash(&mut hasher);
hasher.finish()
}
pub fn combined_id(&self, child_id: Option<Id>) -> Option<Id> {
child_id.map(|child_id| {
use std::hash::Hasher;
let mut hasher = std::collections::hash_map::DefaultHasher::new();
hasher.write_u64(self.id);
child_id.hash(&mut hasher);
hasher.finish()
})
}
// Helper function
pub fn floating_text(
&mut self,
pos: Vec2,
text: &str,
text_style: TextStyle,
align: (Align, Align),
text_color: Option<Color>,
) -> Vec2 {
let font = &self.fonts()[text_style];
let (text, text_size) = font.layout_multiline(text, std::f32::INFINITY);
let x = match align.0 {
Align::Min => pos.x,
Align::Center => pos.x - 0.5 * text_size.x,
Align::Max => pos.x - text_size.x,
};
let y = match align.1 {
Align::Min => pos.y,
Align::Center => pos.y - 0.5 * text_size.y,
Align::Max => pos.y - text_size.y,
};
self.add_text(vec2(x, y), text_style, text, text_color);
text_size
}
pub fn add_text(
&mut self,
pos: Vec2,
text_style: TextStyle,
text: Vec<TextFragment>,
color: Option<Color>,
) {
let color = color.unwrap_or_else(|| self.style().text_color());
for fragment in text {
self.add_paint_cmd(PaintCmd::Text {
color,
pos: pos + vec2(0.0, fragment.y_offset),
text: fragment.text,
text_style,
x_offsets: fragment.x_offsets,
});
}
}
pub fn response(&mut self, interact: InteractInfo) -> GuiResponse {
// TODO: unify GuiResponse and InteractInfo. They are the same thing!
GuiResponse {
hovered: interact.hovered,
clicked: interact.clicked,
active: interact.active,
rect: interact.rect,
data: self.data.clone(),
}
}
}

6
emigui/src/lib.rs
View file

@ -14,7 +14,9 @@ mod fonts;
mod layers; mod layers;
mod layout; mod layout;
pub mod math; pub mod math;
mod memory;
pub mod mesher; pub mod mesher;
mod region;
mod style; mod style;
mod texture_atlas; mod texture_atlas;
mod types; mod types;
@ -26,9 +28,11 @@ pub use {
color::Color, color::Color,
fonts::{FontDefinitions, Fonts, TextStyle}, fonts::{FontDefinitions, Fonts, TextStyle},
layers::*, layers::*,
layout::{Align, Id, Region}, layout::{Align, Id},
math::*, math::*,
memory::Memory,
mesher::{Mesh, Vertex}, mesher::{Mesh, Vertex},
region::Region,
style::Style, style::Style,
texture_atlas::Texture, texture_atlas::Texture,
types::*, types::*,

50
emigui/src/memory.rs Normal file
View file

@ -0,0 +1,50 @@
use std::collections::{HashMap, HashSet};
use crate::{window::WindowState, *};
#[derive(Clone, Debug, Default)]
pub struct Memory {
/// The widget being interacted with (e.g. dragged, in case of a slider).
pub(crate) active_id: Option<Id>,
/// Which foldable regions are open.
pub(crate) open_foldables: HashSet<Id>,
windows: HashMap<Id, WindowState>,
/// Top is last
window_order: Vec<Id>,
}
impl Memory {
/// default_rect: where to put it if it does NOT exist
pub fn get_or_create_window(&mut self, id: Id, default_rect: Rect) -> WindowState {
if let Some(state) = self.windows.get(&id) {
*state
} else {
let state = WindowState { rect: default_rect };
self.windows.insert(id, state);
self.window_order.push(id);
state
}
}
pub fn set_window_state(&mut self, id: Id, state: WindowState) {
self.windows.insert(id, state);
}
pub fn layer_at(&self, pos: Vec2) -> Layer {
for window_id in self.window_order.iter().rev() {
if let Some(state) = self.windows.get(window_id) {
if state.rect.contains(pos) {
return Layer::Window(*window_id);
}
}
}
Layer::Background
}
pub fn move_window_to_top(&mut self, _id: Id) {
// TODO
}
}

444
emigui/src/region.rs Normal file
View file

@ -0,0 +1,444 @@
use std::{hash::Hash, sync::Arc};
use crate::{font::TextFragment, layout::*, widgets::*, *};
/// Represents a region of the screen
/// with a type of layout (horizontal or vertical).
/// TODO: make Region a trait so we can have type-safe HorizontalRegion etc?
pub struct Region {
pub(crate) data: Arc<Data>,
/// Where to put the graphics output of this Region
pub(crate) layer: Layer,
pub(crate) style: Style,
/// Unique ID of this region.
pub(crate) id: Id,
/// Doesn't change.
pub(crate) dir: Direction,
pub(crate) align: Align,
/// Where the next widget will be put.
/// Progresses along self.dir
pub(crate) cursor: Vec2,
/// Bounding box of children.
/// We keep track of our max-size along the orthogonal to self.dir
pub(crate) bounding_size: Vec2,
/// This how much more space we can take up without overflowing our parent.
/// Shrinks as cursor increments.
pub(crate) available_space: Vec2,
}
impl Region {
/// It is up to the caller to make sure there is room for this.
/// Can be used for free painting.
/// NOTE: all coordinates are screen coordinates!
pub fn add_paint_cmd(&mut self, paint_cmd: PaintCmd) {
self.data
.graphics
.lock()
.unwrap()
.layer(self.layer)
.push(paint_cmd)
}
pub fn add_paint_cmds(&mut self, mut cmds: Vec<PaintCmd>) {
self.data
.graphics
.lock()
.unwrap()
.layer(self.layer)
.append(&mut cmds)
}
/// Options for this region, and any child regions we may spawn.
pub fn style(&self) -> &Style {
&self.style
}
pub fn data(&self) -> &Arc<Data> {
&self.data
}
pub fn input(&self) -> &GuiInput {
self.data.input()
}
pub fn fonts(&self) -> &Fonts {
&*self.data.fonts
}
pub fn width(&self) -> f32 {
self.available_space.x
}
pub fn height(&self) -> f32 {
self.available_space.y
}
pub fn size(&self) -> Vec2 {
self.available_space
}
pub fn direction(&self) -> Direction {
self.dir
}
pub fn cursor(&self) -> Vec2 {
self.cursor
}
pub fn set_align(&mut self, align: Align) {
self.align = align;
}
// ------------------------------------------------------------------------
// Sub-regions:
pub fn foldable<S, F>(&mut self, text: S, add_contents: F) -> GuiResponse
where
S: Into<String>,
F: FnOnce(&mut Region),
{
assert!(
self.dir == Direction::Vertical,
"Horizontal foldable is unimplemented"
);
let text: String = text.into();
let id = self.make_child_id(&text);
let text_style = TextStyle::Button;
let font = &self.fonts()[text_style];
let (text, text_size) = font.layout_multiline(&text, self.width());
let text_cursor = self.cursor + self.style.button_padding;
let interact = self.reserve_space(
vec2(
self.available_space.x,
text_size.y + 2.0 * self.style.button_padding.y,
),
Some(id),
);
let open = {
let mut memory = self.data.memory.lock().unwrap();
if interact.clicked {
if memory.open_foldables.contains(&id) {
memory.open_foldables.remove(&id);
} else {
memory.open_foldables.insert(id);
}
}
memory.open_foldables.contains(&id)
};
let fill_color = self.style.interact_fill_color(&interact);
let stroke_color = self.style.interact_stroke_color(&interact);
self.add_paint_cmd(PaintCmd::Rect {
corner_radius: 5.0,
fill_color: Some(fill_color),
outline: Some(Outline {
width: 1.0,
color: color::WHITE,
}),
rect: interact.rect,
});
let (small_icon_rect, _) = self.style.icon_rectangles(&interact.rect);
// Draw a minus:
self.add_paint_cmd(PaintCmd::Line {
points: vec![
vec2(small_icon_rect.min().x, small_icon_rect.center().y),
vec2(small_icon_rect.max().x, small_icon_rect.center().y),
],
color: stroke_color,
width: self.style.line_width,
});
if !open {
// Draw it as a plus:
self.add_paint_cmd(PaintCmd::Line {
points: vec![
vec2(small_icon_rect.center().x, small_icon_rect.min().y),
vec2(small_icon_rect.center().x, small_icon_rect.max().y),
],
color: stroke_color,
width: self.style.line_width,
});
}
self.add_text(
text_cursor + vec2(self.style.start_icon_width, 0.0),
text_style,
text,
None,
);
if open {
let old_id = self.id;
self.id = id;
self.indent(add_contents);
self.id = old_id;
}
self.response(interact)
}
/// Create a child region which is indented to the right
pub fn indent<F>(&mut self, add_contents: F)
where
F: FnOnce(&mut Region),
{
let indent = vec2(self.style.indent, 0.0);
let mut child_region = Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.id,
dir: self.dir,
align: Align::Min,
cursor: self.cursor + indent,
bounding_size: vec2(0.0, 0.0),
available_space: self.available_space - indent,
};
add_contents(&mut child_region);
let size = child_region.bounding_size;
self.reserve_space_without_padding(indent + size);
}
/// Return a sub-region relative to the parent
pub fn relative_region(&mut self, rect: Rect) -> Region {
Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.id,
dir: self.dir,
cursor: self.cursor + rect.min(),
align: self.align,
bounding_size: vec2(0.0, 0.0),
available_space: rect.size(),
}
}
/// A column region with a given width.
pub fn column(&mut self, column_position: Align, width: f32) -> Region {
let x = match column_position {
Align::Min => 0.0,
Align::Center => self.available_space.x / 2.0 - width / 2.0,
Align::Max => self.available_space.x - width,
};
self.relative_region(Rect::from_min_size(
vec2(x, 0.0),
vec2(width, self.available_space.y),
))
}
pub fn left_column(&mut self, width: f32) -> Region {
self.column(Align::Min, width)
}
pub fn centered_column(&mut self, width: f32) -> Region {
self.column(Align::Center, width)
}
pub fn right_column(&mut self, width: f32) -> Region {
self.column(Align::Max, width)
}
pub fn inner_layout<F>(&mut self, dir: Direction, align: Align, add_contents: F)
where
F: FnOnce(&mut Region),
{
let mut child_region = Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.id,
dir,
align,
cursor: self.cursor,
bounding_size: vec2(0.0, 0.0),
available_space: self.available_space,
};
add_contents(&mut child_region);
let size = child_region.bounding_size;
self.reserve_space_without_padding(size);
}
/// Start a region with horizontal layout
pub fn horizontal<F>(&mut self, align: Align, add_contents: F)
where
F: FnOnce(&mut Region),
{
self.inner_layout(Direction::Horizontal, align, add_contents)
}
/// Start a region with vertical layout
pub fn vertical<F>(&mut self, align: Align, add_contents: F)
where
F: FnOnce(&mut Region),
{
self.inner_layout(Direction::Vertical, align, add_contents)
}
/// Temporarily split split a vertical layout into several columns.
///
/// region.columns(2, |columns| {
/// columns[0].add(emigui::widgets::label!("First column"));
/// columns[1].add(emigui::widgets::label!("Second column"));
/// });
pub fn columns<F, R>(&mut self, num_columns: usize, add_contents: F) -> R
where
F: FnOnce(&mut [Region]) -> R,
{
// TODO: ensure there is space
let padding = self.style.item_spacing.x;
let total_padding = padding * (num_columns as f32 - 1.0);
let column_width = (self.available_space.x - total_padding) / (num_columns as f32);
let mut columns: Vec<Region> = (0..num_columns)
.map(|col_idx| Region {
data: self.data.clone(),
layer: self.layer,
style: self.style,
id: self.make_child_id(&("column", col_idx)),
dir: Direction::Vertical,
align: self.align,
cursor: self.cursor + vec2((col_idx as f32) * (column_width + padding), 0.0),
bounding_size: vec2(0.0, 0.0),
available_space: vec2(column_width, self.available_space.y),
})
.collect();
let result = add_contents(&mut columns[..]);
let mut max_height = 0.0;
for region in columns {
let size = region.bounding_size;
max_height = size.y.max(max_height);
}
self.reserve_space_without_padding(vec2(self.available_space.x, max_height));
result
}
// ------------------------------------------------------------------------
pub fn add<W: Widget>(&mut self, widget: W) -> GuiResponse {
widget.add_to(self)
}
// ------------------------------------------------------------------------
pub fn reserve_space(&mut self, size: Vec2, interaction_id: Option<Id>) -> InteractInfo {
let pos = self.reserve_space_without_padding(size + self.style.item_spacing);
let rect = Rect::from_min_size(pos, size);
self.data.interact(self.layer, rect, interaction_id)
}
/// Reserve this much space and move the cursor.
/// Returns where to put the widget.
pub fn reserve_space_without_padding(&mut self, size: Vec2) -> Vec2 {
let mut pos = self.cursor;
if self.dir == Direction::Horizontal {
pos.y += match self.align {
Align::Min => 0.0,
Align::Center => 0.5 * (self.available_space.y - size.y),
Align::Max => self.available_space.y - size.y,
};
self.cursor.x += size.x;
self.available_space.x -= size.x;
self.bounding_size.x += size.x;
self.bounding_size.y = self.bounding_size.y.max(size.y);
} else {
pos.x += match self.align {
Align::Min => 0.0,
Align::Center => 0.5 * (self.available_space.x - size.x),
Align::Max => self.available_space.x - size.x,
};
self.cursor.y += size.y;
self.available_space.y -= size.x;
self.bounding_size.y += size.y;
self.bounding_size.x = self.bounding_size.x.max(size.x);
}
pos
}
pub fn make_child_id<H: Hash>(&self, child_id: &H) -> Id {
use std::hash::Hasher;
let mut hasher = std::collections::hash_map::DefaultHasher::new();
hasher.write_u64(self.id);
child_id.hash(&mut hasher);
hasher.finish()
}
pub fn combined_id(&self, child_id: Option<Id>) -> Option<Id> {
child_id.map(|child_id| {
use std::hash::Hasher;
let mut hasher = std::collections::hash_map::DefaultHasher::new();
hasher.write_u64(self.id);
child_id.hash(&mut hasher);
hasher.finish()
})
}
// Helper function
pub fn floating_text(
&mut self,
pos: Vec2,
text: &str,
text_style: TextStyle,
align: (Align, Align),
text_color: Option<Color>,
) -> Vec2 {
let font = &self.fonts()[text_style];
let (text, text_size) = font.layout_multiline(text, std::f32::INFINITY);
let x = match align.0 {
Align::Min => pos.x,
Align::Center => pos.x - 0.5 * text_size.x,
Align::Max => pos.x - text_size.x,
};
let y = match align.1 {
Align::Min => pos.y,
Align::Center => pos.y - 0.5 * text_size.y,
Align::Max => pos.y - text_size.y,
};
self.add_text(vec2(x, y), text_style, text, text_color);
text_size
}
pub fn add_text(
&mut self,
pos: Vec2,
text_style: TextStyle,
text: Vec<TextFragment>,
color: Option<Color>,
) {
let color = color.unwrap_or_else(|| self.style().text_color());
for fragment in text {
self.add_paint_cmd(PaintCmd::Text {
color,
pos: pos + vec2(0.0, fragment.y_offset),
text: fragment.text,
text_style,
x_offsets: fragment.x_offsets,
});
}
}
pub fn response(&mut self, interact: InteractInfo) -> GuiResponse {
// TODO: unify GuiResponse and InteractInfo. They are the same thing!
GuiResponse {
hovered: interact.hovered,
clicked: interact.clicked,
active: interact.active,
rect: interact.rect,
data: self.data.clone(),
}
}
}

7
emigui/src/widgets.rs
View file

@ -1,11 +1,8 @@
#![allow(clippy::new_without_default_derive)] #![allow(clippy::new_without_default_derive)]
use crate::{ use crate::{
color::{self, Color}, layout::{make_id, Direction, GuiResponse},
fonts::TextStyle, *,
layout::{make_id, Align, Direction, GuiResponse, Id, Region},
math::{remap_clamp, vec2, Rect, Vec2},
types::{Outline, PaintCmd},
}; };
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------