Added Window.SetTitle(). Also oops, forgot to mark the window as created.

6 files changed, 29 insertions, 2 deletions

diff --git a/main.go b/main.go
index 09fae17..273a13a 100644
--- a/main.go
+++ b/main.go
@@ -16,7 +16,10 @@ mainloop:
 		case <-w.Closing:
 			break mainloop
 		case <-b.Clicked:
-			println("clicked")
+			err := w.SetTitle("Button Clicked")
+			if err != nil {
+				panic(err)
+			}
 		}
 	}
 	w.Close()
diff --git a/sysdata.go b/sysdata.go
index 41319b1..339d73e 100644
--- a/sysdata.go
+++ b/sysdata.go
@@ -25,6 +25,9 @@ func (c *cSysData) show() error {
 func (c *cSysData) hide() error {
 	panic(runtime.GOOS + " sysData does not define hide()")
 }
+func (c *cSysData) setText(text string) error {
+	panic(runtime.GOOS + " sysData does not define setText()")
+}
 
 const (
 	c_window = iota
diff --git a/sysdata_windows.go b/sysdata_windows.go
index 586b320..9be3007 100644
--- a/sysdata_windows.go
+++ b/sysdata_windows.go
@@ -143,3 +143,21 @@ func (s *sysData) hide() (err error) {
 	<-ret
 	return nil
 }
+
+func (s *sysData) setText(text string) error {
+	ret := make(chan uiret)
+	defer close(ret)
+	uitask <- &uimsg{
+		call:		_setWindowText,
+		p:		[]uintptr{
+			uintptr(s.hwnd),
+			uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(text))),
+		},
+		ret:		ret,
+	}
+	r := <-ret
+	if r.ret == 0 {		// failure
+		return r.err
+	}
+	return nil
+}
diff --git a/todo.md b/todo.md
index 12a96c0..6accdde 100644
--- a/todo.md
+++ b/todo.md
@@ -1,6 +1,7 @@
 so I don't forget:
 - Window.SizeToFit() or WIndow.OptimalSize() (use: `Window.SetSize(Window.OptimalSize())`) for sizing a window to the control's interest
 - Control.Show()/Control.Hide()
+- Control.SetText()
 
 super ultra important things:
 - the windows build appears to be unstable:
diff --git a/window.go b/window.go
index 780414b..cdb346b 100644
--- a/window.go
+++ b/window.go
@@ -56,7 +56,7 @@ func (w *Window) SetTitle(title string) (err error) {
 	defer w.lock.Unlock()
 
 	if w.created {
-		panic("TODO")
+		return w.sysData.setText(title)
 	}
 	w.initTitle = title
 	return nil
@@ -93,6 +93,7 @@ func (w *Window) Open() (err error) {
 				return err
 			}
 		}
+		w.created = true
 	}
 	return w.sysData.show()
 }
diff --git a/windows_windows.go b/windows_windows.go
index a8eb169..16f451d 100644
--- a/windows_windows.go
+++ b/windows_windows.go
@@ -170,6 +170,7 @@ var (
 	_getClientRect = user32.NewProc("GetClientRect")
 	_enumChildWindows = user32.NewProc("EnumChildWindows")
 	_setWindowPos = user32.NewProc("SetWindowPos")
+	_setWindowText = user32.NewProc("SetWindowTextW")
 	_showWindow = user32.NewProc("ShowWindow")
 )