Improved the support for input methods in Graphics View.

This patch improves the graphics view support for input
methods in several ways:

  * A new ItemAcceptsInputMethod flag is introduced to serve
    the same purpose for graphics items as WA_InputMethodEnabled
    does for widgets: Input method support can be controlled
    individually for each item.
  * The input method sensitivity of a view (i.e. the value of
    the WA_InputMethodEnabled flag) is updated dynamically
    whenever the input method support of the current focus
    item may change.
  * Input contexts are reset whenever an item that supports
    input methods loses focus.

Reviewed-by: janarve
Task-number: 254492

1 files changed, 13 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index c82c2e5..a5ee7e6 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -323,6 +323,10 @@
     performance reasons, these notifications are disabled by default. You must
     enable this flag to receive notifications for position and transform
     changes. This flag was introduced in Qt 4.6.
+
+    \value ItemAcceptsInputMethod The item supports input methods typically
+    used for Asian languages.
+    This flag was introduced in Qt 4.6.
 */
 
 /*!
@@ -1486,6 +1490,12 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags)
             d_ptr->scene->d_func()->needSortTopLevelItems = 1;
     }
 
+    if ((flags & ItemAcceptsInputMethod) != (oldFlags & ItemAcceptsInputMethod)) {
+        // Update input method sensitivity in any views.
+        if (d_ptr->scene)
+            d_ptr->scene->d_func()->updateInputMethodSensitivityInViews();
+    }
+
     if (d_ptr->scene) {
         d_ptr->scene->d_func()->markDirty(this, QRectF(),
                                           /*invalidateChildren=*/true,
@@ -9840,6 +9850,9 @@ QDebug operator<<(QDebug debug, QGraphicsItem::GraphicsItemFlag flag)
     case QGraphicsItem::ItemSendsGeometryChanges:
         str = "ItemSendsGeometryChanges";
         break;
+    case QGraphicsItem::ItemAcceptsInputMethod:
+        str = "ItemAcceptsInputMethod";
+        break;
     }
     debug << str;
     return debug;