Added Table.OnSelected() and implemented it on Windows.

redo/future

@@ -62,6 +62,7 @@ windows
 	- OpenFile() not modal
 	- OpenFile() won't stop Do()
 	- labels draw over themselves
+	- fine-tune Table checkbox behavior (especially with regards to selection)
 gtk+
 	- Area: figure out how Enter is processed in Entry
 		https://git.gnome.org/browse/gtk+/tree/gtk/gtkwindow.c#n1229

redo/table.go

@@ -47,6 +47,9 @@ type Table interface {
 	// TODO bounds checking
 	Selected() int
 	Select(index int)
+
+	// OnSelected is an event that gets triggered after the selection in the Table changes in whatever way (item selected or item deselected).
+	OnSelected(func())
 }
 
 type tablebase struct {

redo/table_windows.c

@@ -25,39 +25,11 @@ static void handle(HWND hwnd, WPARAM wParam, LPARAM lParam, void (*handler)(void
 	(*handler)(data, ht.iItem, ht.iSubItem);
 }
 
-static struct {int code; char *name;} lvnnames[] = {
-{ LVN_ITEMCHANGING, "LVN_ITEMCHANGING" },
-{ LVN_ITEMCHANGED, "LVN_ITEMCHANGED" },
-{ LVN_INSERTITEM, "LVN_INSERTITEM" },
-{ LVN_DELETEITEM, "LVN_DELETEITEM" },
-{ LVN_DELETEALLITEMS, "LVN_DELETEALLITEMS" },
-{ LVN_BEGINLABELEDITA, "LVN_BEGINLABELEDITA" },
-{ LVN_BEGINLABELEDITW, "LVN_BEGINLABELEDITW" },
-{ LVN_ENDLABELEDITA, "LVN_ENDLABELEDITA" },
-{ LVN_ENDLABELEDITW, "LVN_ENDLABELEDITW" },
-{ LVN_COLUMNCLICK, "LVN_COLUMNCLICK" },
-{ LVN_BEGINDRAG, "LVN_BEGINDRAG" },
-{ LVN_BEGINRDRAG, "LVN_BEGINRDRAG" },
-//{ LVN_ODCACHEHINT, "LVN_ODCACHEHINT" },
-{ LVN_ODFINDITEMA, "LVN_ODFINDITEMA" },
-{ LVN_ODFINDITEMW, "LVN_ODFINDITEMW" },
-{ LVN_ITEMACTIVATE, "LVN_ITEMACTIVATE" },
-{ LVN_ODSTATECHANGED, "LVN_ODSTATECHANGED" },
-{ LVN_SETDISPINFOA, "LVN_SETDISPINFOA" },
-{ LVN_SETDISPINFOW, "LVN_SETDISPINFOW" },
-//{ LVN_KEYDOWN, "LVN_KEYDOWN" },
-{ LVN_MARQUEEBEGIN, "LVN_MARQUEEBEGIN" },
-{ LVN_GETINFOTIPA, "LVN_GETINFOTIPA" },
-{ LVN_GETINFOTIPW, "LVN_GETINFOTIPW" },
-{ LVN_BEGINSCROLL, "LVN_BEGINSCROLL" },
-{ LVN_ENDSCROLL, "LVN_ENDSCROLL" },
-{ 0, NULL },
-};
-
 static LRESULT CALLBACK tableSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR id, DWORD_PTR data)
 {
 	NMHDR *nmhdr = (NMHDR *) lParam;
 	NMLVDISPINFOW *fill = (NMLVDISPINFO *) lParam;
+	NMLISTVIEW *nlv = (NMLISTVIEW *) lParam;
 
 	switch (uMsg) {
 	case msgNOTIFY:
@@ -65,8 +37,15 @@ static LRESULT CALLBACK tableSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM
 		case LVN_GETDISPINFO:
 			tableGetCell((void *) data, &(fill->item));
 			return 0;
+		case LVN_ITEMCHANGED:
+			if ((nlv->uChanged & LVIF_STATE) == 0)
+				break;
+			// if both old and new states have the same value for the selected bit, then the selection state did not change, regardless of selected or deselected
+			if ((nlv->uOldState & LVIS_SELECTED) == (nlv->uNewState & LVIS_SELECTED))
+				break;
+			tableOnSelected((void *) data);
+			return 0;
 		}
-for(int i=0;lvnnames[i].code!=0;i++)if(lvnnames[i].code==nmhdr->code)printf("%s\n",lvnnames[i].name);
 		return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
 	case WM_MOUSEMOVE:
 		handle(hwnd, wParam, lParam, tableSetHot, (void *) data);

redo/table_windows.go

@@ -20,6 +20,7 @@ type table struct {
 	hotcol		C.int
 	pushedrow	C.int
 	pushedcol	C.int
+	selected		*event
 }
 
 func finishNewTable(b *tablebase, ty reflect.Type) Table {
@@ -32,6 +33,7 @@ func finishNewTable(b *tablebase, ty reflect.Type) Table {
 		hotcol:		-1,
 		pushedrow:	-1,
 		pushedcol:	-1,
+		selected:		newEvent(),
 	}
 	C.setTableSubclass(t._hwnd, unsafe.Pointer(t))
 	// LVS_EX_FULLROWSELECT gives us selection across the whole row, not just the leftmost column; this makes the list view work like on other platforms
@@ -74,6 +76,10 @@ func (t *table) Select(index int) {
 	C.tableSelectItem(t._hwnd, C.intptr_t(index))
 }
 
+func (t *table) OnSelected(f func()) {
+	t.selected.set(f)
+}
+
 //export tableGetCell
 func tableGetCell(data unsafe.Pointer, item *C.LVITEMW) {
 	t := (*table)(data)
@@ -181,6 +187,12 @@ func tableToggled(data unsafe.Pointer, row C.int, col C.int) {
 	panic(fmt.Errorf("tableSetHot() on non-checkbox at (%d, %d)", row, col))
 }
 
+//export tableOnSelected
+func tableOnSelected(data unsafe.Pointer) {
+	t := (*table)(data)
+	t.selected.fire()
+}
+
 func (t *table) hwnd() C.HWND {
 	return t._hwnd
 }

redo/zz_test.go

@@ -140,6 +140,16 @@ func (tw *testwin) make(done chan struct{}) {
 	*idq = tw.icons
 	tw.icontbl.Unlock()
 	tw.icontbl.LoadImageList(tw.il)
+	tw.icontbl.OnSelected(func() {
+		s := fmt.Sprintf("%d ", tw.icontbl.Selected())
+		tw.icontbl.RLock()
+		defer tw.icontbl.RUnlock()
+		idq := tw.icontbl.Data().(*[]icon)
+		for _, v := range *idq {
+			s += strings.ToUpper(fmt.Sprintf("%v", v.Bool)[0:1]) + " "
+		}
+		tw.w.SetTitle(s)
+	})
 	tw.t.Append("Image List Table", tw.icontbl)
 	tw.group2 = NewGroup("Group", NewButton("Button in Group"))
 	tw.t.Append("Filled Group", tw.group2)