LET'S GET THIS FINAL REWRITE EVER STARTED

1 files changed, 85 insertions, 0 deletions

diff --git a/prev/window_windows.c b/prev/window_windows.c
new file mode 100644
index 0000000..57dc2a6
--- /dev/null
+++ b/prev/window_windows.c
@@ -0,0 +1,85 @@
+// 17 july 2014
+
+#include "winapi_windows.h"
+#include "_cgo_export.h"
+
+#define windowclass L"gouiwindow"
+
+#define windowBackground ((HBRUSH) (COLOR_BTNFACE + 1))
+
+static LRESULT CALLBACK windowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+	void *data;
+	RECT r;
+	LRESULT lResult;
+
+	data = (void *) getWindowData(hwnd, uMsg, wParam, lParam, &lResult);
+	if (data == NULL)
+		return lResult;
+	if (sharedWndProc(hwnd, uMsg, wParam, lParam, &lResult))
+		return lResult;
+	switch (uMsg) {
+	case WM_PRINTCLIENT:
+		// the return value of this message is not documented
+		// just to be safe, do this first, returning its value later
+		lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
+		if (GetClientRect(hwnd, &r) == 0)
+			xpanic("error getting client rect for Window in WM_PRINTCLIENT", GetLastError());
+		if (FillRect((HDC) wParam, &r, windowBackground) == 0)
+			xpanic("error filling WM_PRINTCLIENT DC with window background color", GetLastError());
+		return lResult;
+	// don't do this on WM_WINDOWPOSCHANGING; weird redraw issues will happen
+	case WM_WINDOWPOSCHANGED:
+		if (GetClientRect(hwnd, &r) == 0)
+			xpanic("error getting client rect for Window in WM_SIZE", GetLastError());
+		windowResize(data, &r);
+		return 0;
+	case WM_CLOSE:
+		windowClosing(data);
+		return 0;
+	default:
+		return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+	}
+	xmissedmsg("Window", "windowWndProc()", uMsg);
+	return 0;		// unreached
+}
+
+DWORD makeWindowWindowClass(char **errmsg)
+{
+	WNDCLASSW wc;
+
+	ZeroMemory(&wc, sizeof (WNDCLASSW));
+	wc.lpfnWndProc = windowWndProc;
+	wc.hInstance = hInstance;
+	wc.hIcon = hDefaultIcon;
+	wc.hCursor = hArrowCursor;
+	wc.hbrBackground = windowBackground;
+	wc.lpszClassName = windowclass;
+	if (RegisterClassW(&wc) == 0) {
+		*errmsg = "error registering Window window class";
+		return GetLastError();
+	}
+	return 0;
+}
+
+HWND newWindow(LPWSTR title, int width, int height, void *data)
+{
+	HWND hwnd;
+
+	hwnd = CreateWindowExW(
+		0,
+		windowclass, title,
+		WS_OVERLAPPEDWINDOW,
+		CW_USEDEFAULT, CW_USEDEFAULT,
+		width, height,
+		NULL, NULL, hInstance, data);
+	if (hwnd == NULL)
+		xpanic("Window creation failed", GetLastError());
+	return hwnd;
+}
+
+void windowClose(HWND hwnd)
+{
+	if (DestroyWindow(hwnd) == 0)
+		xpanic("error destroying window", GetLastError());
+}