first commit

src/modules/layout/mod.rs

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+// Layout module — paper space tools (viewports, scale, plot settings).
+// This tab is only shown when the active layout is not "Model".
+
+pub mod mview;
+
+use crate::modules::{CadModule, RibbonGroup};
+
+pub struct LayoutModule;
+
+impl CadModule for LayoutModule {
+    fn id(&self) -> &'static str {
+        "layout"
+    }
+    fn title(&self) -> &'static str {
+        "Layout"
+    }
+
+    fn ribbon_groups(&self) -> Vec<RibbonGroup> {
+        vec![RibbonGroup {
+            title: "Viewport",
+            tools: vec![mview::tool().into()],
+        }]
+    }
+}

src/modules/layout/mview.rs

@@ -0,0 +1,101 @@
+// MVIEW — interactive paper-space viewport creation.
+//
+// Two clicks define opposite corners of a new viewport rectangle.
+// The created Viewport entity is routed to add_entity_to_layout by apply_cmd_result
+// because we're in paper space.
+
+use acadrust::entities::Viewport;
+use acadrust::types::Vector3;
+use acadrust::EntityType;
+
+use crate::command::{CadCommand, CmdResult};
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+use crate::scene::wire_model::WireModel;
+use glam::Vec3;
+
+// ── Ribbon definition ─────────────────────────────────────────────────────
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "MVIEW",
+        label: "Viewport",
+        icon: IconKind::Glyph("⬜"),
+        event: ModuleEvent::Command("MVIEW".to_string()),
+    }
+}
+
+// ── Command ───────────────────────────────────────────────────────────────
+
+pub struct MviewCommand {
+    corner1: Option<Vec3>,
+}
+
+impl MviewCommand {
+    pub fn new() -> Self {
+        Self { corner1: None }
+    }
+}
+
+impl CadCommand for MviewCommand {
+    fn name(&self) -> &'static str {
+        "MVIEW"
+    }
+
+    fn prompt(&self) -> String {
+        if self.corner1.is_none() {
+            "MVIEW  İlk köşeyi belirtin:".to_string()
+        } else {
+            "MVIEW  Karşı köşeyi belirtin:".to_string()
+        }
+    }
+
+    fn on_point(&mut self, pt: Vec3) -> CmdResult {
+        if let Some(c1) = self.corner1 {
+            let w = (pt.x - c1.x).abs() as f64;
+            let h = (pt.y - c1.y).abs() as f64;
+            if w < 1.0 || h < 1.0 {
+                return CmdResult::Cancel;
+            }
+            let cx = ((c1.x + pt.x) / 2.0) as f64;
+            let cy = ((c1.y + pt.y) / 2.0) as f64;
+            let cz = c1.z as f64;
+
+            let mut vp = Viewport::new();
+            vp.center = Vector3::new(cx, cy, cz);
+            vp.width = w;
+            vp.height = h;
+            vp.id = 2; // user viewport (id > 1)
+
+            CmdResult::CommitAndExit(EntityType::Viewport(vp))
+        } else {
+            self.corner1 = Some(pt);
+            CmdResult::NeedPoint
+        }
+    }
+
+    fn on_enter(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+
+    fn on_mouse_move(&mut self, pt: Vec3) -> Option<WireModel> {
+        let c1 = self.corner1?;
+        Some(WireModel {
+            name: "mview_preview".to_string(),
+            points: vec![
+                [c1.x, c1.y, c1.z],
+                [pt.x, c1.y, c1.z],
+                [pt.x, c1.y, pt.z],
+                [c1.x, c1.y, pt.z],
+                [c1.x, c1.y, c1.z],
+            ],
+            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![],
+        })
+    }
+}