--- nono/wx/wxmainview.cpp	2026/04/29 17:04:30	1.1.1.2
+++ nono/wx/wxmainview.cpp	2026/04/29 17:04:33	1.1.1.3
@@ -5,6 +5,7 @@
 
 #include "wxheader.h"
 #include "keyboard.h"
+#include "mystring.h"
 #include "renderer.h"
 #include "scheduler.h"
 #include "wxmainview.h"
@@ -246,6 +247,7 @@ WXMainView::OnMouse(wxMouseEvent& event)
 	if (mousemode) {
 		bool leaving = event.Leaving();
 		bool moving  = event.Moving();
+		bool dragging = event.Dragging();
 		// LeftDown() 等は押された時、LeftIsDown() 等は押されてる間 true。
 		bool rb = event.RightIsDown();
 		bool lb = event.LeftIsDown();
@@ -254,20 +256,34 @@ WXMainView::OnMouse(wxMouseEvent& event)
 		int dx = 0;
 		int dy = 0;
 
-		DMPRINTF(
-			"OnMouse Button=%d %c%c%c Leave=%d (motion=%d) Moving=%d(%d,%d)\n",
-			event.IsButton(),
-			(lb ? 'L' : '-'),
-			(mb ? 'M' : '-'),
-			(rb ? 'R' : '-'),
-			leaving, motion_by_warp_pointer, moving, pos.x, pos.y);
+#if defined(MOUSEDEBUG)
+		std::string dstr = "OnMouse";
+		if (moving || dragging || motion_by_warp_pointer) {
+			dstr += string_format(" (%d,%d)", pos.x, pos.y);
+		}
+		if (moving)
+			dstr += " Moving";
+		if (dragging)
+			dstr += " Dragging";
+		if (motion_by_warp_pointer)
+			dstr += " MotionByWarp";
+		if (event.IsButton()) {
+			dstr += string_format(" Button(%c%c%c)",
+				(lb ? 'L' : '-'),
+				(mb ? 'M' : '-'),
+				(rb ? 'R' : '-'));
+		}
+		if (leaving)
+			dstr += " Leaving";
+		printf("%s\n", dstr.c_str());
+#endif
 
 		if (leaving) {
 			// タスクスイッチした時とかのための自動リリース
 			SetMouseMode(false);
 		}
 
-		if (moving) {
+		if (moving || dragging) {
 			// (My)WarpPointer() で自発的にマウスカーソルを移動させたことで
 			// 来る EVT_MOTION は無視する。
 			if (motion_by_warp_pointer) {
@@ -288,7 +304,12 @@ WXMainView::OnMouse(wxMouseEvent& event)
 		}
 
 		// VM に入力
-		if (dx != 0 || dy != 0 || lb || mb || rb) {
+		if (dx != 0 ||
+		    dy != 0 ||
+		    lb != prevlb ||
+		    mb != prevmb ||
+		    rb != prevrb   )
+		{
 			DMPRINTF("        Input dx=%d dy=%d %c%c%c\n",
 				dx, dy,
 				(lb ? 'L' : '-'),
@@ -297,6 +318,10 @@ WXMainView::OnMouse(wxMouseEvent& event)
 
 			gKeyboard->MouseInput(dx, dy, rb, lb, mb);
 		}
+
+		prevlb = lb;
+		prevmb = mb;
+		prevrb = rb;
 	}
 
 	// EVT_LEFT_DOWN をデフォルト処理するため