Feat: ZOOM IN/OUT/WINDOW commands; ZoomToWindow CmdResult

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/modules/view/mod.rs

@@ -15,6 +15,7 @@ mod xray;
 mod zoom_ext;
 mod zoom_in;
 mod zoom_out;
+pub mod zoom_window;
 
 use crate::modules::{CadModule, RibbonGroup};
 

src/modules/view/zoom_window.rs

@@ -0,0 +1,72 @@
+// ZOOM WINDOW command — pick two corners to define the zoom area.
+
+use glam::Vec3;
+
+use crate::command::{CadCommand, CmdResult};
+use crate::scene::wire_model::WireModel;
+
+pub struct ZoomWindowCommand {
+    first: Option<Vec3>,
+}
+
+impl ZoomWindowCommand {
+    pub fn new() -> Self {
+        Self { first: None }
+    }
+}
+
+impl CadCommand for ZoomWindowCommand {
+    fn name(&self) -> &'static str {
+        "ZOOM WINDOW"
+    }
+
+    fn prompt(&self) -> String {
+        if self.first.is_none() {
+            "ZOOM WINDOW  Specify first corner:".into()
+        } else {
+            "ZOOM WINDOW  Specify opposite corner:".into()
+        }
+    }
+
+    fn on_point(&mut self, pt: Vec3) -> CmdResult {
+        if let Some(p1) = self.first {
+            CmdResult::ZoomToWindow { p1, p2: pt }
+        } else {
+            self.first = Some(pt);
+            CmdResult::NeedPoint
+        }
+    }
+
+    fn on_enter(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+
+    fn on_escape(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+
+    fn on_mouse_move(&mut self, pt: Vec3) -> Option<WireModel> {
+        let p1 = self.first?;
+        let min = p1.min(pt);
+        let max = p1.max(pt);
+        // Draw a rectangle preview
+        Some(WireModel {
+            name: "zoom_window_preview".into(),
+            points: vec![
+                [min.x, min.y, 0.0],
+                [max.x, min.y, 0.0],
+                [max.x, max.y, 0.0],
+                [min.x, max.y, 0.0],
+                [min.x, min.y, 0.0],
+            ],
+            color: WireModel::CYAN,
+            selected: false,
+            pattern_length: 0.0,
+            pattern: [0.0; 8],
+            line_weight_px: 1.0,
+            snap_pts: vec![],
+            tangent_geoms: vec![],
+            key_vertices: vec![],
+        })
+    }
+}