add better brush drawing feedback

1 files changed, 21 insertions, 15 deletions

diff --git a/src/brush.rs b/src/brush.rs
index 98c2b23..1a365b1 100644
--- a/src/brush.rs
+++ b/src/brush.rs
@@ -23,27 +23,28 @@ pub enum Brush {
 }
 
 impl Brush {
-    pub fn grow(&mut self) -> Result<(), BrushError> {
+    pub fn grow(&mut self) {
         match self {
             Brush::Line { ref mut size, .. } => *size += 1,
             Brush::Circle { ref mut size, .. } => *size += 1,
             Brush::Custom { ref mut size, .. } => *size += 1,
-            _ => return Err(BrushError::CannotIncreaseSize),
+            _ => (),
         }
-        Ok(())
     }
-    pub fn shrink(&mut self) -> Result<(), BrushError> {
+
+    pub fn shrink(&mut self) {
         match self {
-            Brush::Line { ref mut size, .. } => *size += size.saturating_sub(1),
-            Brush::Circle { ref mut size, .. } => *size += size.saturating_sub(1),
-            Brush::Custom { ref mut size, .. } => *size += size.saturating_sub(1),
-            _ => return Err(BrushError::CannotIncreaseSize),
+            Brush::Line { ref mut size, .. } => *size = size.saturating_sub(1),
+            Brush::Circle { ref mut size, .. } => *size = size.saturating_sub(1),
+            Brush::Custom { ref mut size, .. } => *size = size.saturating_sub(1),
+            _ => (),
         }
-        Ok(())
     }
-    pub fn new() -> Self {
-        Brush::Circle { size: 0 }
+
+    pub fn new(size: u8) -> Self {
+        Brush::Circle { size }
     }
+
     pub fn line(size: u8, extend: bool) -> Self {
         Brush::Line {
             size,
@@ -51,9 +52,18 @@ impl Brush {
             extend,
         }
     }
+
     pub fn is_line(&self) -> bool {
         matches!(self, Self::Line { .. })
     }
+
+    pub fn size(&self) -> Option<u8> {
+        match self {
+            Brush::Line { size, .. } => Some(size.clone()),
+            Brush::Circle { size } => Some(size.clone()),
+            _ => None,
+        }
+    }
 }
 
 impl fmt::Display for Brush {
@@ -67,7 +77,3 @@ impl fmt::Display for Brush {
         }
     }
 }
-
-pub enum BrushError {
-    CannotIncreaseSize,
-}