Support auto-hide taskbar for panels on Windows.

views/widget/monitor_win.cc

Index: views/widget/monitor_win.cc
===================================================================
--- views/widget/monitor_win.cc	(revision 98344)
+++ views/widget/monitor_win.cc	(working copy)
@@ -4,7 +4,7 @@
 
 #include "views/widget/monitor_win.h"
 
-#include <windows.h>
+#include <shellapi.h>
 
 #include "base/logging.h"
 #include "ui/gfx/rect.h"
@@ -24,4 +24,19 @@
   return gfx::Rect();
 }
 
+HWND GetTopmostAutoHideTaskbarForEdge(UINT edge, HMONITOR monitor) {
+  if (monitor == NULL)

[Peter Kasting, 2011/08/30 18:31:32]

Nit: I'd roll this into the conditional below like the old code did.

[jianli, 2011/08/30 18:38:55]

Done.

+    return NULL;
+  APPBARDATA taskbar_data = { 0 };

[Peter Kasting, 2011/08/30 18:31:32]

Nit: Shorter:

APPBARDATA taskbar_data = { sizeof APPBARDATA, NULL, 0, edge };

[jianli, 2011/08/30 18:38:55]

Done.

+  taskbar_data.cbSize = sizeof APPBARDATA;
+  taskbar_data.uEdge = edge;
+  HWND taskbar = reinterpret_cast<HWND>(SHAppBarMessage(ABM_GETAUTOHIDEBAR,
+                                                        &taskbar_data));
+  if (::IsWindow(taskbar) &&

[Peter Kasting, 2011/08/30 18:31:32]

Nit: Shorter:

return (...) ?
    taskbar : NULL;

[jianli, 2011/08/30 18:38:55]

Done.

+      (MonitorFromWindow(taskbar, MONITOR_DEFAULTTONULL) == monitor) &&
+      (GetWindowLong(taskbar, GWL_EXSTYLE) & WS_EX_TOPMOST))
+    return taskbar;
+  return NULL;
+}
+
 }  // namespace views