Added OpenFile(), the first dialog to be added, and implemented it on Windows... mostly.

1 files changed, 40 insertions, 0 deletions

diff --git a/redo/dialog_windows.c b/redo/dialog_windows.c
new file mode 100644
index 0000000..d5b69f7
--- /dev/null
+++ b/redo/dialog_windows.c
@@ -0,0 +1,40 @@
+// 18 august 2014
+
+#include "winapi_windows.h"
+#include "_cgo_export.h"
+
+// this should be reasonable
+#define NFILENAME 4096
+
+WCHAR *openFile(void)
+{
+	OPENFILENAMEW ofn;
+	DWORD err;
+	WCHAR *filenameBuffer;
+
+	// freed on the Go side
+	filenameBuffer = (WCHAR *) malloc((NFILENAME + 1) * sizeof (WCHAR));
+	if (filenameBuffer == NULL)
+		xpanic("memory exhausted in OpenFile()", GetLastError());
+	filenameBuffer[0] = L'\0';			// required by GetOpenFileName() to indicate no previous filename
+	ZeroMemory(&ofn, sizeof (OPENFILENAMEW));
+	ofn.lStructSize = sizeof (OPENFILENAMEW);
+	ofn.hwndOwner = NULL;
+	ofn.hInstance = hInstance;
+	ofn.lpstrFilter = NULL;			// no filters
+	ofn.lpstrFile = filenameBuffer;
+	ofn.nMaxFile = NFILENAME + 1;	// TODO include + 1?
+	ofn.lpstrInitialDir = NULL;			// let system decide
+	ofn.lpstrTitle = NULL;			// let system decide
+	// TODO OFN_SHAREAWARE?
+	// TODO remove OFN_NODEREFERENCELINKS? or does no filters ensure that anyway?
+	ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_FORCESHOWHIDDEN | OFN_HIDEREADONLY | OFN_LONGNAMES | OFN_NOCHANGEDIR | OFN_NODEREFERENCELINKS | OFN_NOTESTFILECREATE | OFN_PATHMUSTEXIST;
+	if (GetOpenFileNameW(&ofn) == FALSE) {
+		// TODO stringify
+		err = CommDlgExtendedError();
+		if (err == 0)				// user cancelled
+			return NULL;
+		xpanic("error running open file dialog", GetLastError());
+	}
+	return filenameBuffer;
+}