Improve preview popup

res/values/colors.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-	<item name="bg" type="color">#151515</item>
+	<item name="bg" type="color">#1B1B1B</item>
 	<item name="key_bg" type="color">#303030</item>
 	<item name="key_down_bg" type="color">#1B1B1B</item>
 	<item name="key_label" type="color">#FFFFFF</item>
@@ -8,7 +8,7 @@
 	<item name="key_sub_label" type="color">#A0A0A0</item>
 	<item name="preview_text" type="color">#FFFFFF</item>
 	<item name="preview_bg" type="color">#202020</item>
-	<item name="preview_stroke" type="color">#1B1B1B</item>
+	<item name="preview_stroke" type="color">#666666</item>
 	<item name="emoji_button_bg" type="color">#202020</item>
 	<item name="emoji_color" type="color">#FFFFFF</item>
 	<item name="emoji_key_bg" type="color">@color/emoji_button_bg</item>

res/values/dimens.xml

@@ -4,12 +4,12 @@
 	<dimen name="margin_top">2dp</dimen>
 	<dimen name="margin_bottom">5dp</dimen>
 	<dimen name="key_padding">2dp</dimen>
-	<dimen name="key_bg_padding">1.4dp</dimen>
+	<dimen name="key_bg_padding">1.3dp</dimen>
 	<dimen name="key_height">50dp</dimen>
 	<dimen name="key_round">4dp</dimen>
 	<dimen name="label_text_size">16dp</dimen>
 	<dimen name="sublabel_text_size">10dp</dimen>
-	<dimen name="preview_text">18dp</dimen>
+	<dimen name="preview_text">16dp</dimen>
 	<dimen name="preview_corners">6dp</dimen>
 	<dimen name="preview_stroke">1dp</dimen>
 	<dimen name="preview_margin">4dp</dimen>

srcs/juloo.keyboard2/KeyPreviewPopup.java

@@ -1,5 +1,7 @@
 package juloo.keyboard2;
 
+import android.os.Handler;
+import android.os.Message;
 import android.view.Gravity;
 import android.view.View;
 import android.view.View.MeasureSpec;
@@ -8,12 +10,19 @@ import android.widget.PopupWindow;
 import android.widget.TextView;
 
 class KeyPreviewPopup extends PopupWindow
+	implements Handler.Callback
 {
-	private TextView	_content;
+	private final TextView	_content;
-	private View		_anchor;
+	private final View		_anchor;
-	private int			_bottomMargin;
 
-	public KeyPreviewPopup(View anchor)
+	private final int		_bottomMargin;
+	private final long		_dismissTimeout;
+
+	private final Handler	_handler;
+
+	private int				_minWidth;
+
+	public KeyPreviewPopup(View anchor, long dismissTimeout)
 	{
 		super(anchor.getContext());
 		_content = new TextView(anchor.getContext());
@@ -25,6 +34,9 @@ class KeyPreviewPopup extends PopupWindow
 		_content.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);
 		_anchor = anchor;
 		_bottomMargin = (int)anchor.getResources().getDimension(R.dimen.preview_margin);
+		_dismissTimeout = dismissTimeout;
+		_handler = new Handler(this);
+		setMinWidth(0);
 		setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
 		setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
 		setBackgroundDrawable(anchor.getResources().getDrawable(R.drawable.preview_popup));
@@ -33,26 +45,63 @@ class KeyPreviewPopup extends PopupWindow
 		setTouchable(false);
 	}
 
-	public void			setPreview(String preview)
+	@Override
+	public boolean		handleMessage(Message msg)
 	{
-		if (preview == null)
+		forceDismiss();
+		return (true);
+	}
+
+	public void			forceDismiss()
 	{
-			System.out.println("popup preview dismiss");
+		setMinWidth(0);
 		dismiss();
 	}
-		else
+
+	public void			setPreview(KeyValue key, int flags)
 	{
-			System.out.println("popup preview: " + preview);
+		StringBuilder		preview;
-			_content.setText(preview);
+
-			if (!isShowing())
+		if (key == null)
+		{
+			_handler.sendEmptyMessageDelayed(0, _dismissTimeout);
+			return ;
+		}
+		_handler.removeMessages(0);
+		preview = new StringBuilder();
+		if ((flags & KeyValue.FLAG_CTRL) != 0)
+			preview.append("Ctrl-");
+		if ((flags & KeyValue.FLAG_ALT) != 0)
+			preview.append("Alt-");
+		if ((flags & KeyValue.FLAG_SHIFT) != 0 && !Character.isLetter(key.getChar(0)))
+			preview.append("Shift-");
+		preview.append(key.getSymbol(flags));
+		_content.setText(preview.toString());
 		show();
 	}
+
+	private void		setMinWidth(int minWidth)
+	{
+		_minWidth = minWidth;
+		_content.setMinWidth(minWidth);
 	}
 
 	private void		show()
 	{
+		int					x;
+		int					y;
+		int					width;
+		int					height;
+
 		_content.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
-		showAtLocation(_anchor, Gravity.CENTER_HORIZONTAL | Gravity.TOP, 0,
+		width = _content.getMeasuredWidth();
-			-(_content.getMeasuredHeight() + _bottomMargin));
+		height = _content.getMeasuredHeight();
+		if (width > _minWidth)
+			setMinWidth(width);
+		x = (_anchor.getMeasuredWidth() - width) / 2;
+		y = -(height + _bottomMargin);
+		if (!isShowing())
+			showAtLocation(_anchor, Gravity.NO_GRAVITY, x, y);
+		update(x, y, width, height);
 	}
 }

srcs/juloo.keyboard2/Keyboard2View.java

@@ -43,7 +43,11 @@ public class Keyboard2View extends View
 	** TODO: move config values in a Config object
 	** TODO: settings: preview_enabled
 	** TODO: settings: preview_text_size
+	** TODO: settings: preview_timeout
+	** TODO: disable preview in password fields
 	*/
+	private long			_previewDismissTimeout = 150; // especialy this one
+
 	private float			_marginTop;
 	private float			_keyWidth;
 	private float			_keyPadding;
@@ -77,7 +81,7 @@ public class Keyboard2View extends View
 		super(context, attrs);
 		_vibratorService = (Vibrator)context.getSystemService(Context.VIBRATOR_SERVICE);
 		_handler = new Handler(this);
-		_previewPopup = new KeyPreviewPopup(this);
+		_previewPopup = new KeyPreviewPopup(this, _previewDismissTimeout);
 		_horizontalMargin = getResources().getDimension(R.dimen.horizontal_margin);
 		_marginTop = getResources().getDimension(R.dimen.margin_top);
 		_marginBottom = getResources().getDimension(R.dimen.margin_bottom);
@@ -311,13 +315,22 @@ public class Keyboard2View extends View
 	{
 		if (key.value != null && (key.flags & (KeyValue.FLAG_LOCKED | KeyValue.FLAG_NOCHAR)) == 0)
 			((Keyboard2)getContext()).handleKeyUp(key.value, _flags);
-		_previewPopup.setPreview(null); // TODO: preview next down key
+		// previewNextKeyDown
+		for (KeyDown k : _downKeys)
+			if ((k.value.getFlags() & (KeyValue.FLAG_KEY_FONT | KeyValue.FLAG_NOREPEAT | KeyValue.FLAG_NOCHAR)) == 0)
+			{
+				_previewPopup.setPreview(k.value, _flags);
+				return ;
+			}
+		_previewPopup.setPreview(null, 0);
 	}
 
 	private void		handleKeyDown(KeyValue key)
 	{
-		if (key != null)
+		if (key == null)
-			_previewPopup.setPreview(key.getSymbol(_flags));
+			return ;
+		if ((key.getFlags() & (KeyValue.FLAG_KEY_FONT | KeyValue.FLAG_NOREPEAT | KeyValue.FLAG_NOCHAR)) == 0)
+			_previewPopup.setPreview(key, _flags);
 		vibrate();
 	}
 
@@ -422,7 +435,7 @@ public class Keyboard2View extends View
 	public void			onDetachedFromWindow()
 	{
 		super.onDetachedFromWindow();
-		_previewPopup.setPreview(null);
+		_previewPopup.forceDismiss();
 	}
 
 	private void		drawLabel(Canvas canvas, KeyValue k, float x, float y, boolean locked)