From 2b5527d644ea5736ed6c6c3847ba42f35d083189 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 12 Jul 2020 22:25:44 +0100
Subject: [PATCH] divide mouse buttons

---
 templates/script.ts    | 22 +++++++++++++++++++++-
 templates/session.tera |  2 +-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/templates/script.ts b/templates/script.ts
index 4f6eb757..8b18245d 100644
--- a/templates/script.ts
+++ b/templates/script.ts
@@ -203,8 +203,28 @@ function drag_add_piece(piece: PieceId, p: PieceInfo) {
   });
 }
 
-function drag_mousedown(e : MouseEvent) {
+function some_mousedown(e : MouseEvent) {
   console.log('mousedown', e);
+
+  if (e.button != 0) { return }
+  if (e.altKey) { return }
+  if (e.metaKey) { return }
+  if (e.shiftKey) {
+    if (e.ctrlKey) {
+      return;
+    } else {
+      // group select
+    }
+  } else {
+    if (e.ctrlKey) {
+      // region indication
+    } else {
+      drag_mousedown(e);
+    }
+  }
+}
+
+function drag_mousedown(e : MouseEvent) {
   var target = e.target as SVGGraphicsElement; // we check this just now!
   var piece = target.dataset.piece!;
   if (!piece) { return; }
diff --git a/templates/session.tera b/templates/session.tera
index 953fe443..3775f02b 100644
--- a/templates/session.tera
+++ b/templates/session.tera
@@ -12,7 +12,7 @@
 <p>
     <svg id="space"
 	 xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 110"
- 	 onmousedown="drag_mousedown(event)"
+ 	 onmousedown="some_mousedown(event)"
 	 >
       <rect fill="green" x="20" y="5" width="200" height="100"/>
       <g id="pieces_marker"></g>
-- 
2.30.2