X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/fd657b8a5907c8584db84c85535ce281bdd65193..2d611b5cf26c2b16ba3a7d91d79d06e759be2b3d:/contrib/src/ogl/lines.cpp

diff --git a/contrib/src/ogl/lines.cpp b/contrib/src/ogl/lines.cpp
index ebdb997d07..b0f0d6dca2 100644
--- a/contrib/src/ogl/lines.cpp
+++ b/contrib/src/ogl/lines.cpp
@@ -25,7 +25,7 @@
 #include <wx/wx.h>
 #endif
 
-#if wxUSE_DEPRECATED
+#if wxUSE_PROLOGIO
 #include <wx/deprecated/wxexpr.h>
 #endif
 
@@ -36,13 +36,8 @@
 #include <ctype.h>
 #include <math.h>
 
-#include <wx/ogl/basic.h>
-#include <wx/ogl/basicp.h>
-#include <wx/ogl/lines.h>
-#include <wx/ogl/linesp.h>
-#include <wx/ogl/drawn.h>
-#include <wx/ogl/misc.h>
-#include <wx/ogl/canvas.h>
+#include "wx/ogl/ogl.h"
+
 
 // Line shape
 IMPLEMENT_DYNAMIC_CLASS(wxLineShape, wxShape)
@@ -509,22 +504,23 @@ bool wxLineShape::HitTest(double x, double y, int *attachment, double *distance)
     wxRealPoint *point1 = (wxRealPoint *)node->GetData();
     wxRealPoint *point2 = (wxRealPoint *)node->GetNext()->GetData();
 
-    // Allow for inaccurate mousing or vert/horiz lines
+    // For inaccurate mousing allow 8 pixel corridor
     int extra = 4;
-    double left = wxMin(point1->x, point2->x) - extra;
-    double right = wxMax(point1->x, point2->x) + extra;
 
-    double bottom = wxMin(point1->y, point2->y) - extra;
-    double top = wxMax(point1->y, point2->y) + extra;
-
-    if ((x > left && x < right && y > bottom && y < top) || inLabelRegion)
+    double dx = point2->x - point1->x;
+    double dy = point2->y - point1->y;
+    double seg_len = sqrt(dx*dx+dy*dy);
+    double distance_from_seg =
+      seg_len*((x-point1->x)*dy-(y-point1->y)*dx)/(dy*dy+dx*dx);
+    double distance_from_prev =
+      seg_len*((y-point1->y)*dy+(x-point1->x)*dx)/(dy*dy+dx*dx);
+
+    if ((fabs(distance_from_seg) < extra &&
+         distance_from_prev >= 0 && distance_from_prev <= seg_len)
+        || inLabelRegion)
     {
-      // Work out distance from centre of line
-      double centre_x = (double)(left + (right - left)/2.0);
-      double centre_y = (double)(bottom + (top - bottom)/2.0);
-
       *attachment = 0;
-      *distance = (double)sqrt((centre_x - x)*(centre_x - x) + (centre_y - y)*(centre_y - y));
+      *distance = distance_from_seg;
       return TRUE;
     }