/**************************************************************************** ** ** Copyright (C) 2016 Olivier Goffart ** 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.qt.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.util.TypedValue; 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 float m_offsetX; private float m_offsetY; private boolean m_pressed = false; 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 = ev.getRawX(); m_offsetY = ev.getRawY() + getHeight() / 2; m_pressed = true; break; } case MotionEvent.ACTION_MOVE: { if (!m_pressed) return false; mHandle.updatePosition(Math.round(ev.getRawX() - m_offsetX), Math.round(ev.getRawY() - m_offsetY)); break; } case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: m_pressed = false; 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 = 0; private int m_posY = 0; private int m_lastX; private int m_lastY; int tolerance; private boolean m_rtl; int m_yShift; public CursorHandle(Activity activity, View layout, int id, int attr, boolean rtl) { m_activity = activity; m_id = id; m_attr = attr; m_layout = layout; DisplayMetrics metrics = new DisplayMetrics(); activity.getWindowManager().getDefaultDisplay().getMetrics(metrics); m_yShift = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_MM, 1f, metrics); tolerance = Math.min(1, (int)(m_yShift / 2f)); m_lastX = m_lastY = -1 - tolerance; m_rtl = rtl; } 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_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[] layoutLocation = new int[2]; m_layout.getLocationOnScreen(layoutLocation); // This value is used for handling split screen case final int[] activityLocation = new int[2]; m_activity.getWindow().getDecorView().getLocationOnScreen(activityLocation); int x2 = x + layoutLocation[0] - activityLocation[0]; int y2 = y + layoutLocation[1] + m_yShift - activityLocation[1]; if (m_id == QtNative.IdCursorHandle) { x2 -= m_popup.getWidth() / 2 ; } else if ((m_id == QtNative.IdLeftHandle && !m_rtl) || (m_id == QtNative.IdRightHandle && m_rtl)) { x2 -= m_popup.getWidth() * 3 / 4; } else { x2 -= m_popup.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 int bottom() { initOverlay(); final int[] location = new int[2]; m_cursorView.getLocationOnScreen(location); return location[1] + m_cursorView.getHeight(); } 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) { y -= m_yShift; 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; } }