3 files changed, 46 insertions, 5 deletions
diff --git a/generic/ttk/ttkButton.c b/generic/ttk/ttkButton.c
index bc44f25..c00754b 100644
--- a/generic/ttk/ttkButton.c
+++ b/generic/ttk/ttkButton.c
@@ -136,6 +136,15 @@ BaseCleanup(void *recordPtr)
     	TtkFreeImageSpec(basePtr->base.imageSpec);
 }
 
+static void
+BaseImageChanged(
+	ClientData clientData, int x, int y, int width, int height,
+	int imageWidth, int imageHeight)
+{
+    Base *basePtr = (Base *)clientData;
+    TtkResizeWidget(&basePtr->core);
+}
+
 static int BaseConfigure(Tcl_Interp *interp, void *recordPtr, int mask)
 {
     Base *basePtr = recordPtr;
@@ -149,8 +158,8 @@ static int BaseConfigure(Tcl_Interp *interp, void *recordPtr, int mask)
     }
 
     if (basePtr->base.imageObj) {
-	imageSpec = TtkGetImageSpec(
-	    interp, basePtr->core.tkwin, basePtr->base.imageObj);
+	imageSpec = TtkGetImageSpecEx(
+	    interp, basePtr->core.tkwin, basePtr->base.imageObj, BaseImageChanged, basePtr);
 	if (!imageSpec) {
 	    goto error;
 	}
diff --git a/generic/ttk/ttkImage.c b/generic/ttk/ttkImage.c
index 2b12864..c435a50 100644
--- a/generic/ttk/ttkImage.c
+++ b/generic/ttk/ttkImage.c
@@ -25,6 +25,8 @@ struct TtkImageSpec {
     int 		mapCount;	/* #state-specific overrides */
     Ttk_StateSpec	*states;	/* array[mapCount] of states ... */
     Tk_Image		*images;	/* ... per-state images to use */
+    Tk_ImageChangedProc *imageChanged;
+    ClientData		imageChangedClientData;
 };
 
 /* NullImageChanged --
@@ -34,15 +36,41 @@ static void NullImageChanged(ClientData clientData,
     int x, int y, int width, int height, int imageWidth, int imageHeight)
 { /* No-op */ }
 
+/* ImageSpecImageChanged --
+ *     Image changes should trigger a repaint.
+ */
+static void ImageSpecImageChanged(ClientData clientData,
+    int x, int y, int width, int height, int imageWidth, int imageHeight)
+{
+    Ttk_ImageSpec *imageSpec = (Ttk_ImageSpec *)clientData;
+    if (imageSpec->imageChanged != NULL) {
+	imageSpec->imageChanged(imageSpec->imageChangedClientData,
+		x, y, width, height,
+		imageWidth, imageHeight);
+    }
+}
+
 /* TtkGetImageSpec --
  * 	Constructs a Ttk_ImageSpec * from a Tcl_Obj *.
- * 	Result must be released using TtkFreeImageSpec.  
+ * 	Result must be released using TtkFreeImageSpec.
  *
- * TODO: Need a variant of this that takes a user-specified ImageChanged proc
  */
 Ttk_ImageSpec *
 TtkGetImageSpec(Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj *objPtr)
 {
+    return TtkGetImageSpecEx(interp, tkwin, objPtr, NULL, NULL);
+}
+
+/* TtkGetImageSpecEx --
+ * 	Constructs a Ttk_ImageSpec * from a Tcl_Obj *.
+ * 	Result must be released using TtkFreeImageSpec.
+ * 	imageChangedProc will be called when not NULL when
+ * 	the image changes to allow widgets to repaint.
+ */
+Ttk_ImageSpec *
+TtkGetImageSpecEx(Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj *objPtr,
+    Tk_ImageChangedProc *imageChangedProc, ClientData imageChangedClientData)
+{
     Ttk_ImageSpec *imageSpec = 0;
     int i = 0, n = 0, objc;
     Tcl_Obj **objv;
@@ -52,6 +80,8 @@ TtkGetImageSpec(Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj *objPtr)
     imageSpec->mapCount = 0;
     imageSpec->states = 0;
     imageSpec->images = 0;
+    imageSpec->imageChanged = imageChangedProc;
+    imageSpec->imageChangedClientData = imageChangedClientData;
 
     if (Tcl_ListObjGetElements(interp, objPtr, &objc, &objv) != TCL_OK) {
 	goto error;
@@ -73,7 +103,7 @@ TtkGetImageSpec(Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj *objPtr)
     /* Get base image:
     */
     imageSpec->baseImage = Tk_GetImage(
-	    interp, tkwin, Tcl_GetString(objv[0]), NullImageChanged, NULL);
+	    interp, tkwin, Tcl_GetString(objv[0]), ImageSpecImageChanged, imageSpec);
     if (!imageSpec->baseImage) {
     	goto error;
     }
diff --git a/generic/ttk/ttkTheme.h b/generic/ttk/ttkTheme.h
index 7bf2a7f..9251dea 100644
--- a/generic/ttk/ttkTheme.h
+++ b/generic/ttk/ttkTheme.h
@@ -372,6 +372,8 @@ MODULE_SCOPE void Ttk_RegisterNamedColor(Ttk_ResourceCache, const char *, XColor
 
 typedef struct TtkImageSpec Ttk_ImageSpec;
 TTKAPI Ttk_ImageSpec *TtkGetImageSpec(Tcl_Interp *, Tk_Window, Tcl_Obj *);
+TTKAPI Ttk_ImageSpec *TtkGetImageSpecEx(Tcl_Interp *, Tk_Window, Tcl_Obj *,
+					Tk_ImageChangedProc *, ClientData);
 TTKAPI void TtkFreeImageSpec(Ttk_ImageSpec *);
 TTKAPI Tk_Image TtkSelectImage(Ttk_ImageSpec *, Ttk_State);