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Improve Ellipse Tool (#98)

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This commit is contained in:
Paul Kupper
2021-05-04 10:53:00 +02:00
committed by Keavon Chambers
parent 4ffb836673
commit 0ff9e5ff49
7 changed files with 161 additions and 30 deletions
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2
core/editor/src/dispatcher/events.rs
View File

@@ -174,6 +174,8 @@ pub enum Key {
Key7,
Key8,
Key9,
KeyShift,
KeyAlt,
}
bitflags! {

105
core/editor/src/tools/ellipse.rs
View File

@@ -37,6 +37,9 @@ impl Default for EllipseToolFsmState {
#[derive(Clone, Debug, Default)]
struct EllipseToolData {
drag_start: ViewportPosition,
drag_current: ViewportPosition,
constrain_to_circle: bool,
center_around_cursor: bool,
}
impl Fsm for EllipseToolFsmState {
@@ -46,6 +49,7 @@ impl Fsm for EllipseToolFsmState {
match (self, event) {
(EllipseToolFsmState::Ready, Event::LmbDown(mouse_state)) => {
data.drag_start = mouse_state.position;
data.drag_current = mouse_state.position;
operations.push(Operation::MountWorkingFolder { path: vec![] });
EllipseToolFsmState::LmbDown
}
@@ -58,37 +62,102 @@ impl Fsm for EllipseToolFsmState {
}
(EllipseToolFsmState::LmbDown, Event::MouseMove(mouse_state)) => {
data.drag_current = *mouse_state;
operations.push(Operation::ClearWorkingFolder);
operations.push(Operation::AddCircle {
path: vec![],
insert_index: -1,
cx: data.drag_start.x as f64,
cy: data.drag_start.y as f64,
r: data.drag_start.distance(&mouse_state),
style: style::PathStyle::new(None, Some(style::Fill::new(tool_data.primary_color))),
});
operations.push(make_operation(data, tool_data));
EllipseToolFsmState::LmbDown
}
(EllipseToolFsmState::LmbDown, Event::LmbUp(mouse_state)) => {
let r = data.drag_start.distance(&mouse_state.position);
log::info!("draw ellipse with radius: {:.2}", r);
data.drag_current = mouse_state.position;
operations.push(Operation::ClearWorkingFolder);
operations.push(Operation::AddCircle {
path: vec![],
insert_index: -1,
cx: data.drag_start.x as f64,
cy: data.drag_start.y as f64,
r: data.drag_start.distance(&mouse_state.position),
style: style::PathStyle::new(None, Some(style::Fill::new(tool_data.primary_color))),
});
operations.push(make_operation(data, tool_data));
operations.push(Operation::CommitTransaction);
EllipseToolFsmState::Ready
}
(state, Event::KeyDown(Key::KeyShift)) => {
data.constrain_to_circle = true;
if state == EllipseToolFsmState::LmbDown {
operations.push(Operation::ClearWorkingFolder);
operations.push(make_operation(data, tool_data));
}
self
}
(state, Event::KeyUp(Key::KeyShift)) => {
data.constrain_to_circle = false;
if state == EllipseToolFsmState::LmbDown {
operations.push(Operation::ClearWorkingFolder);
operations.push(make_operation(data, tool_data));
}
self
}
(state, Event::KeyDown(Key::KeyAlt)) => {
data.center_around_cursor = true;
if state == EllipseToolFsmState::LmbDown {
operations.push(Operation::ClearWorkingFolder);
operations.push(make_operation(data, tool_data));
}
self
}
(state, Event::KeyUp(Key::KeyAlt)) => {
data.center_around_cursor = false;
if state == EllipseToolFsmState::LmbDown {
operations.push(Operation::ClearWorkingFolder);
operations.push(make_operation(data, tool_data));
}
self
}
_ => self,
}
}
}
fn make_operation(data: &EllipseToolData, tool_data: &DocumentToolData) -> Operation {
let x0 = data.drag_start.x as f64;
let y0 = data.drag_start.y as f64;
let x1 = data.drag_current.x as f64;
let y1 = data.drag_current.y as f64;
let (cx, cy, r_scale) = if data.center_around_cursor { (x0, y0, 1.0) } else { ((x0 + x1) * 0.5, (y0 + y1) * 0.5, 0.5) };
if data.constrain_to_circle {
let r = f64::max((x1 - x0).abs(), (y1 - y0).abs()) * r_scale;
Operation::AddCircle {
path: vec![],
insert_index: -1,
cx,
cy,
r,
style: style::PathStyle::new(None, Some(style::Fill::new(tool_data.primary_color))),
}
} else {
let (rx, ry) = ((x1 - x0).abs() * r_scale, (y1 - y0).abs() * r_scale);
Operation::AddEllipse {
path: vec![],
insert_index: -1,
cx,
cy,
rx,
ry,
rot: 0.0,
style: style::PathStyle::new(None, Some(style::Fill::new(tool_data.primary_color))),
}
}
}