X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a7642be106b7d31cb7eb7b55ef74ec4072dce3a2..73486557c0f533a7da12aee1311a3898e4a6f266:/src/stc/ScintillaWX.cpp

diff --git a/src/stc/ScintillaWX.cpp b/src/stc/ScintillaWX.cpp
index e652082bb9..30a896b903 100644
--- a/src/stc/ScintillaWX.cpp
+++ b/src/stc/ScintillaWX.cpp
@@ -95,6 +95,7 @@ ScintillaWX::ScintillaWX(wxStyledTextCtrl* win) {
     wMain = win;
     wDraw = win;
     stc   = win;
+    wheelRotation = 0;
     Initialise();
 }
 
@@ -363,6 +364,22 @@ void ScintillaWX::DoVScroll(int type, int pos) {
     ScrollTo(topLineNew);
 }
 
+
+void ScintillaWX::DoMouseWheel(int rotation, int delta, int linesPerAction) {
+    int topLineNew = topLine;
+    int lines;
+
+    wheelRotation += rotation;
+    lines = wheelRotation / delta;
+    wheelRotation -= lines * delta;
+    if (lines != 0) {
+        lines *= linesPerAction;
+        topLineNew -= lines;
+        ScrollTo(topLineNew);
+    }
+}
+
+
 void ScintillaWX::DoSize(int width, int height) {
     PRectangle rcClient(0,0,width,height);
     SetScrollBarsTo(rcClient);