Fleshed out page 12.

test/page12.c

@@ -1,16 +1,60 @@
 // 22 may 2016
 #include "test.h"
 
-// TODO add buttons for event testing and Append scroll/selection changing.
+// TODO OS X: if the hboxes are empty, the text views don't show up
+
+static void meChanged(uiMultilineEntry *e, void *data)
+{
+	printf("%s changed\n", (char *) data);
+}
+
+static void setClicked(uiButton *b, void *data)
+{
+	uiMultilineEntrySetText(uiMultilineEntry(data), "set");
+}
+
+static void appendClicked(uiButton *b, void *data)
+{
+	uiMultilineEntryAppend(uiMultilineEntry(data), "append\n");
+}
+
+static uiBox *half(uiMultilineEntry *(*mk)(void), const char *which)
+{
+	uiBox *vbox, *hbox;
+	uiMultilineEntry *me;
+	uiButton *button;
+
+	vbox = newVerticalBox();
+
+	me = (*mk)();
+	uiMultilineEntryOnChanged(me, meChanged, (void *) which);
+	uiBoxAppend(vbox, uiControl(me), 1);
+
+	hbox = newHorizontalBox();
+	uiBoxAppend(vbox, uiControl(hbox), 0);
+
+	button = uiNewButton("Set");
+	uiButtonOnClicked(button, setClicked, me);
+	uiBoxAppend(hbox, uiControl(button), 0);
+
+	button = uiNewButton("Append");
+	uiButtonOnClicked(button, appendClicked, me);
+	uiBoxAppend(hbox, uiControl(button), 0);
+
+	return vbox;
+}
 
 uiBox *makePage12(void)
 {
 	uiBox *page12;
+	uiBox *b;
 
 	page12 = newHorizontalBox();
 
-	uiBoxAppend(page12, uiControl(uiNewMultilineEntry()), 1);
+	b = half(uiNewMultilineEntry, "wrap");
-	uiBoxAppend(page12, uiControl(uiNewNonWrappingMultilineEntry()), 1);
+	uiBoxAppend(page12, uiControl(b), 1);
+	b = half(uiNewNonWrappingMultilineEntry, "no wrap");
+	uiBoxAppend(page12, uiControl(b), 1);
 
 	return page12;
 }