Split layout and Window on Windows to use two separate window classes. This is the first half of the two-part migration of the Windows backend to use container.

1 files changed, 84 insertions, 0 deletions

diff --git a/redo/container_windows.c b/redo/container_windows.c
new file mode 100644
index 0000000..5db4548
--- /dev/null
+++ b/redo/container_windows.c
@@ -0,0 +1,84 @@
+/* 17 july 2014 */
+
+#include "winapi_windows.h"
+#include "_cgo_export.h"
+
+/*
+This could all just be part of Window, but doing so just makes things complex.
+In this case, I chose to waste a window handle rather than keep things super complex.
+If this is seriously an issue in the future, I can roll it back.
+*/
+
+#define containerclass L"gouicontainer"
+
+static LRESULT CALLBACK containerWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+	void *data;
+	RECT r;
+
+	data = (void *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
+	if (data == NULL) {
+		/* the lpParam is available during WM_NCCREATE and WM_CREATE */
+		if (uMsg == WM_NCCREATE) {
+			storelpParam(hwnd, lParam);
+			data = (void *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
+			storeContainerHWND(data, hwnd);
+		}
+		/* act as if we're not ready yet, even during WM_NCCREATE (nothing important to the switch statement below happens here anyway) */
+		return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+	}
+
+	switch (uMsg) {
+	case WM_COMMAND:
+		return forwardCommand(hwnd, uMsg, wParam, lParam);
+	case WM_NOTIFY:
+		return forwardNotify(hwnd, uMsg, wParam, lParam);
+	case WM_SIZE:
+		if (GetClientRect(hwnd, &r) == 0)
+			xpanic("error getting client rect for Window in WM_SIZE", GetLastError());
+		containerResize(data, &r);
+		return 0;
+	default:
+		return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+	}
+	xmissedmsg("container", "containerWndProc()", uMsg);
+	return 0;		/* unreached */
+}
+
+DWORD makeContainerWindowClass(char **errmsg)
+{
+	WNDCLASSW wc;
+
+	ZeroMemory(&wc, sizeof (WNDCLASSW));
+	wc.lpfnWndProc = containerWndProc;
+	wc.hInstance = hInstance;
+	wc.hIcon = hDefaultIcon;
+	wc.hCursor = hArrowCursor;
+	wc.hbrBackground = (HBRUSH) GetStockObject(HOLLOW_BRUSH);
+	if (wc.hbrBackground == NULL) {
+		*errmsg = "error getting hollow brush for container window class";
+		return GetLastError();
+	}
+	wc.lpszClassName = containerclass;
+	if (RegisterClassW(&wc) == 0) {
+		*errmsg = "error registering container window class";
+		return GetLastError();
+	}
+	return 0;
+}
+
+HWND newContainer(void *data)
+{
+	HWND hwnd;
+
+	hwnd = CreateWindowExW(
+		0,
+		containerclass, L"",
+		WS_CHILD | WS_VISIBLE,
+		CW_USEDEFAULT, CW_USEDEFAULT,
+		100, 100,
+		msgwin, NULL, hInstance, data);
+	if (hwnd == NULL)
+		xpanic("container creation failed", GetLastError());
+	return hwnd;
+}