tarsila 0.1.1

GUI image editor for pixel art
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152

use crate::{util, Effect, Resources};
use egui::Color32;
use lapix::{Event, Size, Tool};
use macroquad::prelude::*;
use std::collections::HashMap;

const TOOL_BTN_IMG_SIZE: Size<usize> = Size { x: 16, y: 16 };
const TOOLS: [Tool; 8] = [
    Tool::Brush,
    Tool::Bucket,
    Tool::Eraser,
    Tool::Eyedropper,
    Tool::Line,
    Tool::Selection,
    Tool::Move,
    Tool::Rectangle,
];

pub struct Toolbar {
    tools: HashMap<Tool, ToolButton>,
    brush: [u8; 3],
    brush_alpha: String,
}

impl Toolbar {
    pub fn new() -> Self {
        Self {
            tools: TOOLS.iter().map(|t| (*t, ToolButton::new(*t))).collect(),
            brush: [0, 0, 0],
            brush_alpha: "255".to_owned(),
        }
    }

    pub fn sync(&mut self, main_color: [u8; 4]) {
        self.brush = util::rgba_to_rgb_u8(main_color);
        self.brush_alpha = main_color[3].to_string();
    }

    pub fn get_mut(&mut self, tool: Tool) -> Option<&mut ToolButton> {
        self.tools.get_mut(&tool)
    }

    pub fn update(&mut self, egui_ctx: &egui::Context, selected_tool: Tool) -> Vec<Effect> {
        let mut events = Vec::new();

        egui::Window::new("Toolbox")
            //            .default_pos((15., 280.))
            .show(egui_ctx, |ui| {
                ui.horizontal(|ui| {
                    let colorpicker = ui.color_edit_button_srgb(&mut self.brush);
                    let label = ui.label("a:");
                    let text_edit = ui
                        .add(
                            egui::widgets::TextEdit::singleline(&mut self.brush_alpha)
                                .desired_width(30.0),
                        )
                        .labelled_by(label.id);
                    let color = [
                        self.brush[0],
                        self.brush[1],
                        self.brush[2],
                        self.brush_alpha.parse().unwrap_or(255),
                    ];

                    if colorpicker.changed() || text_edit.changed() {
                        events.push(Event::SetMainColor(color.into()).into());
                    }

                    let btn = ui.button("+").on_hover_text("add to palette");
                    if btn.clicked() {
                        events.push(Event::AddToPalette(color.into()).into());
                    }
                });

                ui.horizontal_wrapped(|ui| {
                    ui.set_max_width(160.);
                    for tool in TOOLS {
                        if let Some(btn) = self.get_mut(tool) {
                            btn.add_to_ui(ui, selected_tool == tool, || {
                                events.push(Event::SetTool(tool).into())
                            });
                        }
                    }
                });
            });

        events
    }
}

pub struct ToolButton {
    tool: Tool,
    image: egui::ColorImage,
    texture: Option<egui::TextureHandle>,
}

impl ToolButton {
    pub fn new(tool: Tool) -> Self {
        let bytes = Resources::tool_icon(tool);
        let img = Image::from_file_with_format(bytes, None);

        let x = TOOL_BTN_IMG_SIZE.x;
        let y = TOOL_BTN_IMG_SIZE.y;
        let image = egui::ColorImage::from_rgba_unmultiplied([x, y], &img.bytes);

        Self {
            tool,
            image,
            texture: None,
        }
    }

    pub fn add_to_ui<F: FnMut()>(&mut self, ui: &mut egui::Ui, selected: bool, mut action: F) {
        let tooltip: &'static str = self.tooltip();

        let texture: &egui::TextureHandle = self.texture.get_or_insert_with(|| {
            ui.ctx()
                .load_texture("", self.image.clone(), Default::default())
        });
        let prev_bg_fill = ui.style().visuals.widgets.inactive.weak_bg_fill;
        // Highlight the currently selected tool.
        //
        // FIXME: Ui::scope destroys the toolbar's wrapping layout, so we're forced to temporarily
        // set the style and then set back the old style manually after we're done.
        if selected {
            ui.style_mut().visuals.widgets.inactive.weak_bg_fill = Color32::from_rgb(218, 218, 218);
        }
        if ui
            .add(egui::ImageButton::new(texture, texture.size_vec2()))
            .on_hover_text(tooltip)
            .clicked()
        {
            (action)();
        }
        ui.style_mut().visuals.widgets.inactive.weak_bg_fill = prev_bg_fill;
    }

    // TODO: the shortcut being hardcoded here is a problem since it's
    // configurable
    fn tooltip(&self) -> &'static str {
        match self.tool {
            Tool::Brush => "brush tool (B)",
            Tool::Bucket => "bucket tool (G)",
            Tool::Eraser => "eraser tool (E)",
            Tool::Eyedropper => "eyedropper tool (I)",
            Tool::Line => "line tool (L)",
            Tool::Selection => "selection tool (S)",
            Tool::Move => "move tool (M)",
            Tool::Rectangle => "rectangle tool (R)",
        }
    }
}