* library/demos/cscroll.tcl: add MouseWheel bindings for aqua.

	* macosx/tkMacOSXCarbonEvents.c (TkMacOSXInitCarbonEvents):
	* macosx/tkMacOSXMouseEvent.c (TkMacOSXProcessMouseEvent,
	GenerateMouseWheelEvent): add support for kEventMouseScroll events
	(smooth mouse wheel scrolling from mighty mouse or scrolling trackpad)
	by handling kEventMouseWheelMoved on application target as well as on
	dispatcher, in order to pick up synthesized MouseWheel events from
	HIObject handler (c.f. QA1453); add support for horizontal scrolling
	events by generating MouseWheel XEvent with Shift modifier.

1 files changed, 27 insertions, 15 deletions

diff --git a/macosx/tkMacOSXMouseEvent.c b/macosx/tkMacOSXMouseEvent.c
index ea9919d..b5f7a06 100644
--- a/macosx/tkMacOSXMouseEvent.c
+++ b/macosx/tkMacOSXMouseEvent.c
@@ -54,7 +54,7 @@
  *      software in accordance with the terms specified in this
  *      license.
  *
- * RCS: @(#) $Id: tkMacOSXMouseEvent.c,v 1.15 2005/11/27 02:36:15 das Exp $
+ * RCS: @(#) $Id: tkMacOSXMouseEvent.c,v 1.16 2005/12/13 03:44:34 das Exp $
  */
 
 #include "tkInt.h"
@@ -128,7 +128,7 @@ TkMacOSXProcessMouseEvent(TkMacOSXEvent *eventPtr, MacEventStatus * statusPtr)
     Point	   where, where2;
     int		   xOffset, yOffset, result;
     TkDisplay *	   dispPtr;
-    OSStatus	    status;
+    OSStatus	   status;
     MouseEventData mouseEventData, * medPtr = &mouseEventData;
 
     switch (eventPtr->eKind) {
@@ -208,17 +208,24 @@ TkMacOSXProcessMouseEvent(TkMacOSXEvent *eventPtr, MacEventStatus * statusPtr)
     }
     if (eventPtr->eKind == kEventMouseWheelMoved) {
 	status = GetEventParameter(eventPtr->eventRef,
-		kEventParamMouseWheelDelta,
-		typeLongInteger, NULL,
+		kEventParamMouseWheelDelta, typeLongInteger, NULL,
 		sizeof(long), NULL, &medPtr->delta);
 	if (status != noErr ) {
 #ifdef TK_MAC_DEBUG
-	     fprintf (stderr,
-		 "Failed to retrieve mouse wheel delta, %d\n", (int) status);
+	    fprintf (stderr,
+		"Failed to retrieve mouse wheel delta, %d\n", (int) status);
 #endif
-	     statusPtr->err = 1;
-	     return false;
-	 }
+	    statusPtr->err = 1;
+	    return false;
+	} else {
+	    EventMouseWheelAxis axis;
+	    status = GetEventParameter(eventPtr->eventRef,
+		    kEventParamMouseWheelAxis, typeMouseWheelAxis, NULL,
+		    sizeof(EventMouseWheelAxis), NULL, &axis);
+	    if (status == noErr && axis == kEventMouseWheelAxisX) {
+		 medPtr->state |= ShiftMask;
+	    }
+	}
     }
 
     dispPtr = TkGetDisplayList();
@@ -226,11 +233,15 @@ TkMacOSXProcessMouseEvent(TkMacOSXEvent *eventPtr, MacEventStatus * statusPtr)
 
     if (eventPtr->eKind != kEventMouseDown) {
 	/*
-	 * MouseMoved, MouseDragged or kEventMouseWheelMoved 
+	 * MouseMoved, MouseDragged or MouseWheelMoved 
 	 */
 
 	if (eventPtr->eKind == kEventMouseWheelMoved) {
-	    return GenerateMouseWheelEvent(medPtr);
+	    int res = GenerateMouseWheelEvent(medPtr);
+	    if (res) {
+		 statusPtr->stopProcessing = 1;
+	    }
+	    return res;
 	} else {
 	    return GeneratePollingEvents(medPtr);
 	}
@@ -534,7 +545,6 @@ static int
 GenerateMouseWheelEvent(MouseEventData * medPtr)
 {
     Tk_Window tkwin, rootwin, grabWin;
-    int local_x, local_y;
     TkDisplay *dispPtr;
     TkWindow  *winPtr;
     XEvent     xEvent;
@@ -550,7 +560,7 @@ GenerateMouseWheelEvent(MouseEventData * medPtr)
 	} else {
 	    tkwin = Tk_TopCoordsToWindow(rootwin, 
 		    medPtr->local.h, medPtr->local.v, 
-		    &local_x, &local_y);
+		    &xEvent.xbutton.x, &xEvent.xbutton.y);
 	}
     }
     
@@ -565,12 +575,14 @@ GenerateMouseWheelEvent(MouseEventData * medPtr)
 	tkwin = grabWin;
     }
     if (!tkwin) {
-       return true;
+       return false;
     }
     winPtr = (TkWindow *) tkwin;
     xEvent.type = MouseWheelEvent;
     xEvent.xkey.keycode = medPtr->delta;
-    xEvent.xbutton.state = TkMacOSXButtonKeyState();
+    xEvent.xbutton.x_root = medPtr->global.h;
+    xEvent.xbutton.y_root = medPtr->global.v;
+    xEvent.xbutton.state = medPtr->state;
     xEvent.xany.serial = LastKnownRequestProcessed(winPtr->display);
     xEvent.xany.send_event = false;
     xEvent.xany.display = winPtr->display;