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stiletto
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canvas-element-enum #3

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enrico merged 11 commits from canvas-element-enum into master 2020-11-08 15:44:20 +01:00
Conversation 0 Commits 11 Files Changed 8 +16 -14
1 changed files with 16 additions and 14 deletions
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Showing only changes of commit 01b7f569f9 - Show all commits

30
src/main.rs
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@ -29,13 +29,13 @@ mod stiletto {
#[derive(Clone, druid::Data)]
pub enum CanvasElement {
Path(Path),
Freehand(Path),
}
impl CanvasElement {
pub fn bounding_box(&self) -> druid::Rect {
match self {
CanvasElement::Path(p) => {
CanvasElement::Freehand(p) => {
use druid::kurbo::Shape;
p.kurbo_path.bounding_box()
}
@ -43,7 +43,7 @@ mod stiletto {
}
pub fn draw(&self, ctx: &mut druid::PaintCtx) {
match self {
CanvasElement::Path(p) => {
CanvasElement::Freehand(p) => {
let stroke_color = druid::Color::rgb8(0, 128, 0);
ctx.stroke(&p.kurbo_path, &stroke_color, 2.0);
}
@ -52,7 +52,7 @@ mod stiletto {
pub fn get_path_mut(&mut self) -> Option<&mut Path> {
match self {
CanvasElement::Path(p) => Some(p),
CanvasElement::Freehand(p) => Some(p),
}
}
}
@ -66,20 +66,24 @@ use stiletto::CanvasElement;
struct CanvasData {
current_element: Option<CanvasElement>,
elements: Vector<CanvasElement>,
is_drawing: bool,
}
impl CanvasData {
fn is_drawing(&self) -> bool {
self.current_element.is_some()
}
}
impl Widget<CanvasData> for CanvasWidget {
fn event(&mut self, _ctx: &mut EventCtx, event: &Event, data: &mut CanvasData, _env: &Env) {
match event {
Event::MouseDown(mouse_event) => {
data.is_drawing = true;
let mut kurbo_path = BezPath::new();
kurbo_path.move_to((mouse_event.pos.x, mouse_event.pos.y));
data.current_element = Some(CanvasElement::Path(stiletto::Path { kurbo_path }));
data.current_element = Some(CanvasElement::Freehand(stiletto::Path { kurbo_path }));
}
Event::MouseMove(mouse_event) => {
if data.is_drawing {
if data.is_drawing() {
if let Some(current_element) = data.current_element.as_mut() {
current_element
.get_path_mut()
@ -90,10 +94,9 @@ impl Widget<CanvasData> for CanvasWidget {
}
}
Event::MouseUp(_) => {
if data.is_drawing {
if data.is_drawing() {
if let Some(current_element) = data.current_element.take() {
data.elements.push_back(current_element);
data.is_drawing = false;
}
}
}
@ -118,10 +121,10 @@ impl Widget<CanvasData> for CanvasWidget {
_env: &Env,
) {
// the current_element is moved to the elements array, no need to repaint
if old_data.is_drawing && !data.is_drawing {
if old_data.is_drawing() && !data.is_drawing() {
return;
}
if data.is_drawing {
if data.is_drawing() {
data.current_element.as_ref().map(|e| {
ctx.request_paint_rect(e.bounding_box());
});
@ -170,14 +173,13 @@ impl Widget<CanvasData> for CanvasWidget {
pub fn main() {
let window = WindowDesc::new(|| CanvasWidget {})
//.window_size((1024.0, 1400.0))
.window_size((1024.0, 1400.0))
.title(
LocalizedString::new("custom-widget-demo-window-title").with_placeholder("Stiletto"),
);
let canvas_data = CanvasData {
current_element: None,
elements: vector![],
is_drawing: false,
};
AppLauncher::with_window(window)
.use_simple_logger()