Automatically hide word candidate list

This change adds support for automatically hiding word candidate list
when inactive. This feature includes the following enhancements:

- Added new settings:
  * VirtualKeyboardSettings.wordCandidateList.autoHideDelay
  * VirtualKeyboardSettings.wordCandidateList.alwaysVisible
- Automatic hiding of word candidate list when inactive and when
  autoHideDelay elapsed.
- alwaysVisible setting restores the old functionality.
- Added new signal selectionListsChanged() to input method, allowing
  the input method to dynamically allocate or deallocate selection
  lists.
- HunspellInputMethod does not allocate selection list when
  dictionary cannot be loaded, or Qt::ImhNoPredictiveText is enabled.
  Also, it will no longer use pre-edit text in this case.
- OpenWnnInputMethod does not allocate selection list if not needed.

[ChangeLog] Automatically hide word candidate list when inactive.

Change-Id: Ifa95ae8a7c47a96719ffdc2929601ff2ef9c0d2e
Reviewed-by: Gordan Markus <gordan.markus@pelagicore.com>
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 35 insertions, 1 deletions

diff --git a/src/virtualkeyboard/settings.cpp b/src/virtualkeyboard/settings.cpp
index f01c506d..55faca8c 100644
--- a/src/virtualkeyboard/settings.cpp
+++ b/src/virtualkeyboard/settings.cpp
@@ -42,7 +42,9 @@ public:
         locale(),
         availableLocales(),
         activeLocales(),
-        layoutPath()
+        layoutPath(),
+        wclAutoHideDelay(5000),
+        wclAlwaysVisible(false)
     {}
 
     QString style;
@@ -51,6 +53,8 @@ public:
     QStringList availableLocales;
     QStringList activeLocales;
     QUrl layoutPath;
+    int wclAutoHideDelay;
+    bool wclAlwaysVisible;
 };
 
 static QScopedPointer<Settings> s_settingsInstance;
@@ -162,4 +166,34 @@ void Settings::setLayoutPath(const QUrl &layoutPath)
     }
 }
 
+int Settings::wclAutoHideDelay() const
+{
+    Q_D(const Settings);
+    return d->wclAutoHideDelay;
+}
+
+void Settings::setWclAutoHideDelay(int wclAutoHideDelay)
+{
+    Q_D(Settings);
+    if (d->wclAutoHideDelay != wclAutoHideDelay) {
+        d->wclAutoHideDelay = wclAutoHideDelay;
+        emit wclAutoHideDelayChanged();
+    }
+}
+
+bool Settings::wclAlwaysVisible() const
+{
+    Q_D(const Settings);
+    return d->wclAlwaysVisible;
+}
+
+void Settings::setWclAlwaysVisible(bool wclAlwaysVisible)
+{
+    Q_D(Settings);
+    if (d->wclAlwaysVisible != wclAlwaysVisible) {
+        d->wclAlwaysVisible = wclAlwaysVisible;
+        emit wclAlwaysVisibleChanged();
+    }
+}
+
 } // namespace QtVirtualKeyboard