WINGs: wpopupbutton add two functions to change the displayed item

This patch is adding WMSelectPopUpButtonPreviousItem and
WMSelectPopUpButtonNextItem functions to the widget.
The WINGs lib version is bumped.

WINGs/WINGs/WINGs.h

@@ -1462,6 +1462,10 @@ void WMSetPopUpButtonEnabled(WMPopUpButton *bPtr, Bool flag);
 
 Bool WMGetPopUpButtonEnabled(WMPopUpButton *bPtr);
 
+int WMSelectPopUpButtonPreviousItem(WMPopUpButton *bPtr);
+
+int WMSelectPopUpButtonNextItem(WMPopUpButton *bPtr);
+
 /* ---[ WINGs/wprogressindicator.c ]------------------------------------- */
 
 WMProgressIndicator* WMCreateProgressIndicator(WMWidget *parent);

WINGs/wpopupbutton.c

@@ -252,6 +252,56 @@ WMMenuItem *WMGetPopUpButtonMenuItem(WMPopUpButton * bPtr, int index)
 	return WMGetFromArray(bPtr->items, index);
 }
 
+int WMSelectPopUpButtonPreviousItem(WMPopUpButton * bPtr)
+{
+	int testIndex;
+
+	CHECK_CLASS(bPtr, WC_PopUpButton);
+
+	if (bPtr->flags.pullsDown || bPtr->selectedItemIndex < 0)
+		return -1;
+
+	testIndex = bPtr->selectedItemIndex - 1;
+
+	while (testIndex >= 0 && !WMGetPopUpButtonItemEnabled(bPtr, testIndex))
+		testIndex--;
+
+	if (testIndex != -1) {
+		WMSetPopUpButtonSelectedItem(bPtr, testIndex);
+		if (bPtr->action)
+			(*bPtr->action) (bPtr, bPtr->clientData);
+		return testIndex;
+	}
+
+	return -1;
+}
+
+int WMSelectPopUpButtonNextItem(WMPopUpButton * bPtr)
+{
+	int itemCount;
+	int testIndex;
+
+	CHECK_CLASS(bPtr, WC_PopUpButton);
+
+	if (bPtr->flags.pullsDown || bPtr->selectedItemIndex < 0)
+		return -1;
+
+	itemCount = WMGetArrayItemCount(bPtr->items);
+	testIndex = bPtr->selectedItemIndex + 1;
+
+	while (testIndex < itemCount && !WMGetPopUpButtonItemEnabled(bPtr, testIndex))
+		testIndex++;
+
+	if (testIndex != itemCount) {
+		WMSetPopUpButtonSelectedItem(bPtr, testIndex);
+		if (bPtr->action)
+			(*bPtr->action) (bPtr, bPtr->clientData);
+		return testIndex;
+	}
+
+	return -1;
+}
+
 static void paintPopUpButton(PopUpButton * bPtr)
 {
 	W_Screen *scr = bPtr->view->screen;

configure.ac

@@ -78,9 +78,9 @@ WRASTER_VERSION=$WRASTER_CURRENT:$WRASTER_REVISION:$WRASTER_AGE
 AC_SUBST(WRASTER_VERSION)
 dnl
 dnl libWINGs
-WINGS_CURRENT=5
+WINGS_CURRENT=6
 WINGS_REVISION=0
-WINGS_AGE=2
+WINGS_AGE=3
 WINGS_VERSION=$WINGS_CURRENT:$WINGS_REVISION:$WINGS_AGE
 AC_SUBST(WINGS_VERSION)
 dnl