From d1d3969d7dab76983cd91bba702518921d8c77be Mon Sep 17 00:00:00 2001
From: Rob Haarsma <phaseIV@zonnet.nl>
Date: Fri, 31 Jan 2003 17:22:20 +0000
Subject: added mousewheel support for UV Image window

---
 source/blender/src/drawimage.c | 49 ++++++++++++++++++++++++++++++++++++++++++
 source/blender/src/space.c     | 24 ++++-----------------
 2 files changed, 53 insertions(+), 20 deletions(-)

(limited to 'source')

diff --git a/source/blender/src/drawimage.c b/source/blender/src/drawimage.c
index 9c5370600e5..efe75fc4586 100644
--- a/source/blender/src/drawimage.c
+++ b/source/blender/src/drawimage.c
@@ -54,6 +54,7 @@
 #include "DNA_packedFile_types.h"
 #include "DNA_screen_types.h"
 #include "DNA_space_types.h"
+#include "DNA_userdef_types.h"
 
 #include "BKE_utildefines.h"
 #include "BKE_global.h"
@@ -541,6 +542,54 @@ void image_viewmove(void)
 	}
 }
 
+void image_viewzoom(unsigned short event)
+{
+	SpaceImage *sima= curarea->spacedata.first;
+	int width, height;
+
+	if(U.uiflag & WHEELZOOMDIR) {
+		if (event==WHEELDOWNMOUSE || event == PADPLUSKEY) {
+			sima->zoom *= 2;
+		} else {
+			sima->zoom /= 2;
+			/* Check if the image will still be visible after zooming out */
+			if (sima->zoom < 1) {
+				calc_image_view(G.sima, 'p');
+				if (sima->image) {
+					if (sima->image->ibuf) {
+						width = sima->image->ibuf->x * sima->zoom;
+						height = sima->image->ibuf->y * sima->zoom;
+						if ((width < 4) && (height < 4)) {
+							/* Image will become too small, reset value */
+							sima->zoom *= 2;
+						}
+					}
+				}
+			}
+		}
+	} else {
+		if (event==WHEELUPMOUSE || event == PADPLUSKEY) {
+			sima->zoom *= 2;
+		} else {
+			sima->zoom /= 2;
+			/* Check if the image will still be visible after zooming out */
+			if (sima->zoom < 1) {
+				calc_image_view(G.sima, 'p');
+				if (sima->image) {
+					if (sima->image->ibuf) {
+						width = sima->image->ibuf->x * sima->zoom;
+						height = sima->image->ibuf->y * sima->zoom;
+						if ((width < 4) && (height < 4)) {
+							/* Image will become too small, reset value */
+							sima->zoom *= 2;
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
 /**
  * Updates the fields of the View2D member of the SpaceImage struct.
  * Default behavior is to reset the position of the image and set the zoom to 1
diff --git a/source/blender/src/space.c b/source/blender/src/space.c
index 4be129d5679..4bb247fafac 100644
--- a/source/blender/src/space.c
+++ b/source/blender/src/space.c
@@ -1999,7 +1999,6 @@ void winqreadimagespace(unsigned short event, short val, char ascii)
 {
 	SpaceImage *sima= curarea->spacedata.first;
 	View2D *v2d= &sima->v2d;
-	int width, height;
 #ifdef NAN_TPT
 	IMG_BrushPtr brush;
 	IMG_CanvasPtr canvas;
@@ -2108,31 +2107,16 @@ void winqreadimagespace(unsigned short event, short val, char ascii)
 		case MIDDLEMOUSE:
 			image_viewmove();
 			break;
+		case WHEELUPMOUSE:
+		case WHEELDOWNMOUSE:
 		case PADPLUSKEY:
-			sima->zoom *= 2;
+		case PADMINUS:
+			image_viewzoom(event);
 			scrarea_queue_winredraw(curarea);
 			break;
 		case HOMEKEY:
 			image_home();
 			break;
-		case PADMINUS:
-			sima->zoom /= 2;
-			/* Check if the image will still be visible after zooming out */
-			if (sima->zoom < 1) {
-				calc_image_view(G.sima, 'p');
-				if (sima->image) {
-					if (sima->image->ibuf) {
-						width = sima->image->ibuf->x * sima->zoom;
-						height = sima->image->ibuf->y * sima->zoom;
-						if ((width < 4) && (height < 4)) {
-							/* Image will become too small, reset value */
-							sima->zoom *= 2;
-						}
-					}
-				}
-			}
-			scrarea_queue_winredraw(curarea);
-			break;			
 	}
 }
 
-- 
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