From 4d674ebd3d0e857fcaade5ff480ed6edd7eb7dd8 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Mon, 10 Feb 2014 16:00:11 -0500
Subject: [PATCH] Added listboxes and added a list box to the example window.

---
 common.go    |  3 +-
 listboxes.go | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 main.go      | 33 +++++++++++++++++--
 3 files changed, 123 insertions(+), 4 deletions(-)
 create mode 100644 listboxes.go

diff --git a/common.go b/common.go
index a51583d..51ebf6f 100644
--- a/common.go
+++ b/common.go
@@ -6,7 +6,8 @@ import (
 	"unsafe"
 )
 
-// TODO filter out commctrl.h stuff because the combobox stuff has values that differ between windows versions and bleh
+// TODO filter out commctrl.h stuff because the combobox and listbox stuff has values that differ between windows versions and bleh
+// either that or switch to ComboBoxEx and ListView because they might not have that problem???
 
 var (
 	user32 = syscall.NewLazyDLL("user32.dll")
diff --git a/listboxes.go b/listboxes.go
new file mode 100644
index 0000000..294cd96
--- /dev/null
+++ b/listboxes.go
@@ -0,0 +1,91 @@
+// 10 february 2014
+package main
+
+import (
+//	"syscall"
+//	"unsafe"
+)
+
+// Listbox styles.
+const (
+	// from winuser.h
+	LBS_NOTIFY = 0x0001
+	LBS_SORT = 0x0002
+	LBS_NOREDRAW = 0x0004
+	LBS_MULTIPLESEL = 0x0008
+	LBS_OWNERDRAWFIXED = 0x0010
+	LBS_OWNERDRAWVARIABLE = 0x0020
+	LBS_HASSTRINGS = 0x0040
+	LBS_USETABSTOPS = 0x0080
+	LBS_NOINTEGRALHEIGHT = 0x0100
+	LBS_MULTICOLUMN = 0x0200
+	LBS_WANTKEYBOARDINPUT = 0x0400
+	LBS_EXTENDEDSEL = 0x0800
+	LBS_DISABLENOSCROLL = 0x1000
+	LBS_NODATA = 0x2000
+	LBS_NOSEL = 0x4000
+	LBS_COMBOBOX = 0x8000
+	LBS_STANDARD = (LBS_NOTIFY | LBS_SORT | WS_VSCROLL | WS_BORDER)
+)
+
+// Listbox messages.
+// TODO filter out messages not provided in windows 2000
+const (
+	// from winuser.h
+	LB_ADDSTRING = 0x0180
+	LB_INSERTSTRING = 0x0181
+	LB_DELETESTRING = 0x0182
+	LB_SELITEMRANGEEX = 0x0183
+	LB_RESETCONTENT = 0x0184
+	LB_SETSEL = 0x0185
+	LB_SETCURSEL = 0x0186
+	LB_GETSEL = 0x0187
+	LB_GETCURSEL = 0x0188
+	LB_GETTEXT = 0x0189
+	LB_GETTEXTLEN = 0x018A
+	LB_GETCOUNT = 0x018B
+	LB_SELECTSTRING = 0x018C
+	LB_DIR = 0x018D
+	LB_GETTOPINDEX = 0x018E
+	LB_FINDSTRING = 0x018F
+	LB_GETSELCOUNT = 0x0190
+	LB_GETSELITEMS = 0x0191
+	LB_SETTABSTOPS = 0x0192
+	LB_GETHORIZONTALEXTENT = 0x0193
+	LB_SETHORIZONTALEXTENT = 0x0194
+	LB_SETCOLUMNWIDTH = 0x0195
+	LB_ADDFILE = 0x0196
+	LB_SETTOPINDEX = 0x0197
+	LB_GETITEMRECT = 0x0198
+	LB_GETITEMDATA = 0x0199
+	LB_SETITEMDATA = 0x019A
+	LB_SELITEMRANGE = 0x019B
+	LB_SETANCHORINDEX = 0x019C
+	LB_GETANCHORINDEX = 0x019D
+	LB_SETCARETINDEX = 0x019E
+	LB_GETCARETINDEX = 0x019F
+	LB_SETITEMHEIGHT = 0x01A0
+	LB_GETITEMHEIGHT = 0x01A1
+	LB_FINDSTRINGEXACT = 0x01A2
+	LB_SETLOCALE = 0x01A5
+	LB_GETLOCALE = 0x01A6
+	LB_SETCOUNT = 0x01A7
+	LB_INITSTORAGE = 0x01A8
+	LB_ITEMFROMPOINT = 0x01A9
+	LB_MULTIPLEADDSTRING = 0x01B1
+	LB_GETLISTBOXINFO = 0x01B2
+)
+
+// Listbox WM_COMMAND notifications and message returns.
+// TODO filter out notifications not provided in windows 2000
+const (
+	// from winuser.h
+	LB_OKAY = 0
+	LB_ERR = (-1)				// TODO this will blow up the Go compiler if it's used
+	LBN_ERRSPACE = (-2)		// TODO this will blow up the Go compiler if it's used
+	LBN_SELCHANGE = 1
+	LBN_DBLCLK = 2
+	LBN_SELCANCEL = 3
+	LBN_SETFOCUS = 4
+	LBN_KILLFOCUS = 5
+)
diff --git a/main.go b/main.go
index a5b68af..1e27088 100644
--- a/main.go
+++ b/main.go
@@ -24,9 +24,10 @@ const (
 	IDC_VARCOMBO
 	IDC_FIXCOMBO
 	IDC_EDIT
+	IDC_LIST
 )
 
-var varCombo, fixCombo, edit HWND
+var varCombo, fixCombo, edit, list HWND
 
 func wndProc(hwnd HWND, msg uint32, wParam WPARAM, lParam LPARAM) LRESULT {
 	switch msg {
@@ -60,13 +61,20 @@ func wndProc(hwnd HWND, msg uint32, wParam WPARAM, lParam LPARAM) LRESULT {
 				fatalf("error getting edit field text: %v", err)
 			}
 
+			listIndex, err := SendMessage(list, LB_GETCURSEL, 0, 0)
+			if err != nil {
+				fatalf("error getting fixed list box current selection: %v", err)
+			}
+			// TODO get text from index
+
 			MessageBox(hwnd,
 				fmt.Sprintf("button state: %s\n" +
 					"variable combo box text: %s\n" +
 					"fixed combo box text with WM_GETTEXT: %s\n" +
 					"fixed combo box current index: %d\n" +
-					"edit field text: %s\n",
-					buttonclick, varText, fixTextWM, fixTextIndex, editText),
+					"edit field text: %s\n" +
+					"list box current index: %d\n",
+					buttonclick, varText, fixTextWM, fixTextIndex, editText, listIndex),
 				"note",
 				MB_OK)
 		}
@@ -194,6 +202,25 @@ func main() {
 		fatalf("error creating edit field: %v", err)
 	}
 
+	list, err = CreateWindowEx(
+		0,
+		"LISTBOX", "",
+		LBS_STANDARD | controlStyle,
+		20, 80, 100, 100,
+		hwnd, HMENU(IDC_FIXCOMBO), hInstance, NULL)
+	if err != nil {
+		fatalf("error creating list box: %v", err)
+	}
+	lItems := []string{"i", "j", "k", "l"}
+	for _, v := range lItems {
+		_, err := SendMessage(list, LB_ADDSTRING, 0,
+			LPARAMFromString(v))
+		if err != nil {
+			fatalf("error adding %q to list box: %v", v, err)
+		}
+		// TODO check actual return value as THAT indicates an error
+	}
+
 	_, err = ShowWindow(hwnd, nCmdShow)
 	if err != nil {
 		fatalf("error showing window: %v", err)