Allow to obtain virtual keyboard height

On mobile platforms virtual keyboards take up significant amount of
screen space and UI containing a text box may need to be adjusted
after the keyboard appears to keep the text box visible to user. This
commit adds a way to obtain virtual keyabord height so that controls
are aware of how much they need to move.

2 files changed, 17 insertions, 0 deletions

diff --git a/platform/android/java/src/org/godotengine/godot/Godot.java b/platform/android/java/src/org/godotengine/godot/Godot.java
index 53a90e4cfe..053dfa631a 100644
--- a/platform/android/java/src/org/godotengine/godot/Godot.java
+++ b/platform/android/java/src/org/godotengine/godot/Godot.java
@@ -277,6 +277,21 @@ public class Godot extends Activity implements SensorEventListener, IDownloaderC
 		edittext.setView(mView);
 		io.setEdit(edittext);
 
+		final Godot godot = this;
+		mView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+				@Override
+				public void onGlobalLayout() {
+					Point fullSize = new Point();
+					godot.getWindowManager().getDefaultDisplay().getSize(fullSize);
+					Rect gameSize = new Rect();
+					godot.mView.getWindowVisibleDisplayFrame(gameSize);
+
+					final int keyboardHeight = fullSize.y - gameSize.bottom;
+					Log.d("GODOT", "setVirtualKeyboardHeight: " + keyboardHeight);
+					GodotLib.setVirtualKeyboardHeight(keyboardHeight);
+				}
+		});
+
 		// Ad layout
 		adLayout = new RelativeLayout(this);
 		adLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
diff --git a/platform/android/java/src/org/godotengine/godot/GodotLib.java b/platform/android/java/src/org/godotengine/godot/GodotLib.java
index 47a690140f..e0ed4cd38c 100644
--- a/platform/android/java/src/org/godotengine/godot/GodotLib.java
+++ b/platform/android/java/src/org/godotengine/godot/GodotLib.java
@@ -69,4 +69,6 @@ public class GodotLib {
 	public static native void callobject(int p_ID, String p_method, Object[] p_params);
 	public static native void calldeferred(int p_ID, String p_method, Object[] p_params);
 
+	public static native void setVirtualKeyboardHeight(int p_height);
+
 }