Add virtual keyboard geometry support to Windows port

Overrides keyboardRect() and isInputPanelVisible() in QWindowsInputContext
in order to provide support for virtual keyboard geometry and visibility
information in the Windows platform.

Change-Id: I15382e604dc076929d253c0c1fbe64ea7da853ce
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwindowsinputcontext.cpp b/src/plugins/platforms/windows/qwindowsinputcontext.cpp
index 8c228f588e..b9dd2c557e 100644
--- a/src/plugins/platforms/windows/qwindowsinputcontext.cpp
+++ b/src/plugins/platforms/windows/qwindowsinputcontext.cpp
@@ -221,6 +221,28 @@ void QWindowsInputContext::setFocusObject(QObject *)
     updateEnabled();
 }
 
+HWND QWindowsInputContext::getVirtualKeyboardWindowHandle() const
+{
+    return ::FindWindowA("IPTip_Main_Window", nullptr);
+}
+
+QRectF QWindowsInputContext::keyboardRect() const
+{
+    if (HWND hwnd = getVirtualKeyboardWindowHandle()) {
+        RECT rect;
+        if (::GetWindowRect(hwnd, &rect)) {
+            return QRectF(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
+        }
+    }
+    return QRectF();
+}
+
+bool QWindowsInputContext::isInputPanelVisible() const
+{
+    HWND hwnd = getVirtualKeyboardWindowHandle();
+    return hwnd && ::IsWindowEnabled(hwnd) && ::IsWindowVisible(hwnd);
+}
+
 void QWindowsInputContext::updateEnabled()
 {
     if (!QGuiApplication::focusObject())