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+/****************************************************************************
+**
+** Copyright (C) 2016 Olivier Goffart <ogoffart@woboq.com>
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Android port of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+package org.qtproject.qt5.android;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.util.DisplayMetrics;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.ImageView;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
+import android.view.MotionEvent;
+import android.widget.PopupWindow;
+import android.app.Activity;
+import android.view.ViewTreeObserver;
+
+/* This view represents one of the handle (selection or cursor handle) */
+class CursorView extends ImageView
+{
+ private CursorHandle mHandle;
+ // The coordinare which where clicked
+ private int m_offsetX;
+ private int m_offsetY;
+
+ CursorView (Context context, CursorHandle handle) {
+ super(context);
+ mHandle = handle;
+ }
+
+ // Called when the handle was moved programatically , with the delta amount in pixels
+ public void adjusted(int dx, int dy) {
+ m_offsetX += dx;
+ m_offsetY += dy;
+ }
+
+ @Override
+ public boolean onTouchEvent(MotionEvent ev) {
+ switch (ev.getActionMasked()) {
+ case MotionEvent.ACTION_DOWN: {
+ m_offsetX = Math.round(ev.getRawX());
+ m_offsetY = Math.round(ev.getRawY());
+ break;
+ }
+
+ case MotionEvent.ACTION_MOVE: {
+ mHandle.updatePosition(Math.round(ev.getRawX()) - m_offsetX,
+ Math.round(ev.getRawY()) - m_offsetY);
+ break;
+ }
+
+ case MotionEvent.ACTION_UP:
+ break;
+
+ case MotionEvent.ACTION_CANCEL:
+ break;
+ }
+ return true;
+ }
+
+}
+
+// Helper class that manages a cursor or selection handle
+public class CursorHandle implements ViewTreeObserver.OnPreDrawListener
+{
+ private View m_layout = null;
+ private CursorView m_cursorView = null;
+ private PopupWindow m_popup = null;
+ private int m_id;
+ private int m_attr;
+ private Activity m_activity;
+ private int m_posX;
+ private int m_posY;
+ private int m_lastX;
+ private int m_lastY;
+ int tolerance;
+
+ public CursorHandle(Activity activity, View layout, int id, int attr) {
+ m_activity = activity;
+ m_id = id;
+ m_attr = attr;
+ m_layout = layout;
+ DisplayMetrics metrics = new DisplayMetrics();
+ activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
+ tolerance = Math.round(2 * metrics.density);
+ m_lastX = m_lastY = -1 - tolerance;
+ }
+
+ private boolean initOverlay(){
+ if (m_popup == null){
+
+ Context context = m_layout.getContext();
+ int[] attrs = {m_attr};
+ TypedArray a = context.getTheme().obtainStyledAttributes(attrs);
+ Drawable drawable = a.getDrawable(0);
+
+ m_cursorView = new CursorView(context, this);
+ m_cursorView.setImageDrawable(drawable);
+ // m_layout.addView(m_cursorView);
+
+ m_popup = new PopupWindow(context, null, android.R.attr.textSelectHandleWindowStyle);
+ m_popup.setSplitTouchEnabled(true);
+ m_popup.setClippingEnabled(false);
+ m_popup.setContentView(m_cursorView);
+ m_popup.setWidth(drawable.getIntrinsicWidth());
+ m_popup.setHeight(drawable.getIntrinsicHeight());
+
+ m_layout.getViewTreeObserver().addOnPreDrawListener(this);
+ }
+ return true;
+ }
+
+ // Show the handle at a given position (or move it if it is already shown)
+ public void setPosition(final int x, final int y){
+ initOverlay();
+
+ final int[] location = new int[2];
+ m_layout.getLocationOnScreen(location);
+
+ int x2 = x + location[0];
+ int y2 = y + location[1];
+
+ if (m_id == QtNative.IdCursorHandle) {
+ x2 -= m_cursorView.getWidth() / 2 ;
+ } else if (m_id == QtNative.IdLeftHandle) {
+ x2 -= m_cursorView.getWidth() * 3 / 4;
+ } else if (m_id == QtNative.IdRightHandle) {
+ x2 -= m_cursorView.getWidth() / 4;
+ }
+
+ if (m_popup.isShowing()) {
+ m_popup.update(x2, y2, -1, -1);
+ m_cursorView.adjusted(x - m_posX, y - m_posY);
+ } else {
+ m_popup.showAtLocation(m_layout, 0, x2, y2);
+ }
+
+ m_posX = x;
+ m_posY = y;
+ }
+
+ public void hide() {
+ if (m_popup != null) {
+ m_popup.dismiss();
+ }
+ }
+
+ // The handle was dragged by a given relative position
+ public void updatePosition(int x, int y) {
+ if (Math.abs(m_lastX - x) > tolerance || Math.abs(m_lastY - y) > tolerance) {
+ QtNative.handleLocationChanged(m_id, x + m_posX, y + m_posY);
+ m_lastX = x;
+ m_lastY = y;
+ }
+ }
+
+ @Override
+ public boolean onPreDraw() {
+ // This hook is called when the view location is changed
+ // For example if the keyboard appears.
+ // Adjust the position of the handle accordingly
+ if (m_popup != null && m_popup.isShowing())
+ setPosition(m_posX, m_posY);
+
+ return true;
+ }
+}
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