Moved it all back; the preemptive multitaksing during an event handler kills us on all platforms. Going to have to restrict ALL GUI accss to happening from one t hread, so going to need to drop uitask entirely and have just a start() callback for startup code and a post() function for posting requests to windows (like channel sends but into a perpetual buffer).

1 files changed, 85 insertions, 0 deletions

diff --git a/init_windows.go b/init_windows.go
new file mode 100644
index 0000000..b8f11a5
--- /dev/null
+++ b/init_windows.go
@@ -0,0 +1,85 @@
+// 8 february 2014
+
+package ui
+
+import (
+	"fmt"
+	"unsafe"
+)
+
+var (
+	hInstance _HANDLE
+	nCmdShow  int
+)
+
+// TODO is this documented?
+func getWinMainhInstance() (err error) {
+	r1, _, err := kernel32.NewProc("GetModuleHandleW").Call(uintptr(_NULL))
+	if r1 == 0 { // failure
+		return err
+	}
+	hInstance = _HANDLE(r1)
+	return nil
+}
+
+// this is what MinGW-w64 does (for instance, http://sourceforge.net/p/mingw-w64/code/6604/tree/trunk/mingw-w64-crt/crt/crtexe.c#l320); Burgundy in irc.freenode.net/#winapi said that the Visual C++ runtime does this too
+func getWinMainnCmdShow() {
+	var info struct {
+		cb              uint32
+		lpReserved      *uint16
+		lpDesktop       *uint16
+		lpTitle         *uint16
+		dwX             uint32
+		dwY             uint32
+		dwXSize         uint32
+		dwYSzie         uint32
+		dwXCountChars   uint32
+		dwYCountChars   uint32
+		dwFillAttribute uint32
+		dwFlags         uint32
+		wShowWindow     uint16
+		cbReserved2     uint16
+		lpReserved2     *byte
+		hStdInput       _HANDLE
+		hStdOutput      _HANDLE
+		hStdError       _HANDLE
+	}
+
+	// does not fail according to MSDN
+	kernel32.NewProc("GetStartupInfoW").Call(uintptr(unsafe.Pointer(&info)))
+	if info.dwFlags&_STARTF_USESHOWWINDOW != 0 {
+		nCmdShow = int(info.wShowWindow)
+	} else {
+		nCmdShow = _SW_SHOWDEFAULT
+	}
+}
+
+func doWindowsInit() (err error) {
+	err = getWinMainhInstance()
+	if err != nil {
+		return fmt.Errorf("error getting WinMain hInstance: %v", err)
+	}
+	getWinMainnCmdShow()
+	err = initWndClassInfo()
+	if err != nil {
+		return fmt.Errorf("error initializing standard window class auxiliary info: %v", err)
+	}
+	err = registerStdWndClass()
+	if err != nil {
+		return fmt.Errorf("error registering standard window class (for Window): %v", err)
+	}
+	err = registerAreaWndClass()
+	if err != nil {
+		return fmt.Errorf("error registering Area window class: %v", err)
+	}
+	err = getStandardWindowFonts()
+	if err != nil {
+		return fmt.Errorf("error getting standard window fonts: %v", err)
+	}
+	err = initCommonControls()
+	if err != nil {
+		return fmt.Errorf("error initializing Common Controls (comctl32.dll): %v", err)
+	}
+	// others go here
+	return nil // all ready to go
+}